Release 4.11 arch/s390/kvm/kvm-s390.c

Directory: arch/s390/kvm
/*
 * hosting zSeries kernel virtual machines
 *
 * Copyright IBM Corp. 2008, 2009
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License (version 2 only)
 * as published by the Free Software Foundation.
 *
 *    Author(s): Carsten Otte <cotte@de.ibm.com>
 *               Christian Borntraeger <borntraeger@de.ibm.com>
 *               Heiko Carstens <heiko.carstens@de.ibm.com>
 *               Christian Ehrhardt <ehrhardt@de.ibm.com>
 *               Jason J. Herne <jjherne@us.ibm.com>
 */

#include <linux/compiler.h>
#include <linux/err.h>
#include <linux/fs.h>
#include <linux/hrtimer.h>
#include <linux/init.h>
#include <linux/kvm.h>
#include <linux/kvm_host.h>
#include <linux/mman.h>
#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/random.h>
#include <linux/slab.h>
#include <linux/timer.h>
#include <linux/vmalloc.h>
#include <linux/bitmap.h>
#include <linux/sched/signal.h>

#include <asm/asm-offsets.h>
#include <asm/lowcore.h>
#include <asm/stp.h>
#include <asm/pgtable.h>
#include <asm/gmap.h>
#include <asm/nmi.h>
#include <asm/switch_to.h>
#include <asm/isc.h>
#include <asm/sclp.h>
#include <asm/cpacf.h>
#include <asm/timex.h>
#include "kvm-s390.h"
#include "gaccess.h"


#define KMSG_COMPONENT "kvm-s390"

#undef pr_fmt

#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt


#define CREATE_TRACE_POINTS
#include "trace.h"
#include "trace-s390.h"


#define MEM_OP_MAX_SIZE 65536	
/* Maximum transfer size for KVM_S390_MEM_OP */

#define LOCAL_IRQS 32

#define VCPU_IRQS_MAX_BUF (sizeof(struct kvm_s390_irq) * \
                           (KVM_MAX_VCPUS + LOCAL_IRQS))


#define VCPU_STAT(x) offsetof(struct kvm_vcpu, stat.x), KVM_STAT_VCPU


struct kvm_stats_debugfs_item debugfs_entries[] = {
	{ "userspace_handled", VCPU_STAT(exit_userspace) },
	{ "exit_null", VCPU_STAT(exit_null) },
	{ "exit_validity", VCPU_STAT(exit_validity) },
	{ "exit_stop_request", VCPU_STAT(exit_stop_request) },
	{ "exit_external_request", VCPU_STAT(exit_external_request) },
	{ "exit_external_interrupt", VCPU_STAT(exit_external_interrupt) },
	{ "exit_instruction", VCPU_STAT(exit_instruction) },
	{ "exit_pei", VCPU_STAT(exit_pei) },
	{ "exit_program_interruption", VCPU_STAT(exit_program_interruption) },
	{ "exit_instr_and_program_int", VCPU_STAT(exit_instr_and_program) },
	{ "exit_operation_exception", VCPU_STAT(exit_operation_exception) },
	{ "halt_successful_poll", VCPU_STAT(halt_successful_poll) },
	{ "halt_attempted_poll", VCPU_STAT(halt_attempted_poll) },
	{ "halt_poll_invalid", VCPU_STAT(halt_poll_invalid) },
	{ "halt_wakeup", VCPU_STAT(halt_wakeup) },
	{ "instruction_lctlg", VCPU_STAT(instruction_lctlg) },
	{ "instruction_lctl", VCPU_STAT(instruction_lctl) },
	{ "instruction_stctl", VCPU_STAT(instruction_stctl) },
	{ "instruction_stctg", VCPU_STAT(instruction_stctg) },
	{ "deliver_emergency_signal", VCPU_STAT(deliver_emergency_signal) },
	{ "deliver_external_call", VCPU_STAT(deliver_external_call) },
	{ "deliver_service_signal", VCPU_STAT(deliver_service_signal) },
	{ "deliver_virtio_interrupt", VCPU_STAT(deliver_virtio_interrupt) },
	{ "deliver_stop_signal", VCPU_STAT(deliver_stop_signal) },
	{ "deliver_prefix_signal", VCPU_STAT(deliver_prefix_signal) },
	{ "deliver_restart_signal", VCPU_STAT(deliver_restart_signal) },
	{ "deliver_program_interruption", VCPU_STAT(deliver_program_int) },
	{ "exit_wait_state", VCPU_STAT(exit_wait_state) },
	{ "instruction_pfmf", VCPU_STAT(instruction_pfmf) },
	{ "instruction_stidp", VCPU_STAT(instruction_stidp) },
	{ "instruction_spx", VCPU_STAT(instruction_spx) },
	{ "instruction_stpx", VCPU_STAT(instruction_stpx) },
	{ "instruction_stap", VCPU_STAT(instruction_stap) },
	{ "instruction_storage_key", VCPU_STAT(instruction_storage_key) },
	{ "instruction_ipte_interlock", VCPU_STAT(instruction_ipte_interlock) },
	{ "instruction_stsch", VCPU_STAT(instruction_stsch) },
	{ "instruction_chsc", VCPU_STAT(instruction_chsc) },
	{ "instruction_essa", VCPU_STAT(instruction_essa) },
	{ "instruction_stsi", VCPU_STAT(instruction_stsi) },
	{ "instruction_stfl", VCPU_STAT(instruction_stfl) },
	{ "instruction_tprot", VCPU_STAT(instruction_tprot) },
	{ "instruction_sthyi", VCPU_STAT(instruction_sthyi) },
	{ "instruction_sie", VCPU_STAT(instruction_sie) },
	{ "instruction_sigp_sense", VCPU_STAT(instruction_sigp_sense) },
	{ "instruction_sigp_sense_running", VCPU_STAT(instruction_sigp_sense_running) },
	{ "instruction_sigp_external_call", VCPU_STAT(instruction_sigp_external_call) },
	{ "instruction_sigp_emergency", VCPU_STAT(instruction_sigp_emergency) },
	{ "instruction_sigp_cond_emergency", VCPU_STAT(instruction_sigp_cond_emergency) },
	{ "instruction_sigp_start", VCPU_STAT(instruction_sigp_start) },
	{ "instruction_sigp_stop", VCPU_STAT(instruction_sigp_stop) },
	{ "instruction_sigp_stop_store_status", VCPU_STAT(instruction_sigp_stop_store_status) },
	{ "instruction_sigp_store_status", VCPU_STAT(instruction_sigp_store_status) },
	{ "instruction_sigp_store_adtl_status", VCPU_STAT(instruction_sigp_store_adtl_status) },
	{ "instruction_sigp_set_arch", VCPU_STAT(instruction_sigp_arch) },
	{ "instruction_sigp_set_prefix", VCPU_STAT(instruction_sigp_prefix) },
	{ "instruction_sigp_restart", VCPU_STAT(instruction_sigp_restart) },
	{ "instruction_sigp_cpu_reset", VCPU_STAT(instruction_sigp_cpu_reset) },
	{ "instruction_sigp_init_cpu_reset", VCPU_STAT(instruction_sigp_init_cpu_reset) },
	{ "instruction_sigp_unknown", VCPU_STAT(instruction_sigp_unknown) },
	{ "diagnose_10", VCPU_STAT(diagnose_10) },
	{ "diagnose_44", VCPU_STAT(diagnose_44) },
	{ "diagnose_9c", VCPU_STAT(diagnose_9c) },
	{ "diagnose_258", VCPU_STAT(diagnose_258) },
	{ "diagnose_308", VCPU_STAT(diagnose_308) },
	{ "diagnose_500", VCPU_STAT(diagnose_500) },
	{ NULL }
};

/* allow nested virtualization in KVM (if enabled by user space) */

static int nested;
module_param(nested, int, S_IRUGO);
MODULE_PARM_DESC(nested, "Nested virtualization support");

/* upper facilities limit for kvm */

unsigned long kvm_s390_fac_list_mask[16] = { FACILITIES_KVM };



unsigned long kvm_s390_fac_list_mask_size(void)
{
	BUILD_BUG_ON(ARRAY_SIZE(kvm_s390_fac_list_mask) > S390_ARCH_FAC_MASK_SIZE_U64);
	return ARRAY_SIZE(kvm_s390_fac_list_mask);
}

Contributors
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Michael Müller 24 100.00% 2 100.00%
Total 24 100.00% 2 100.00%

/* available cpu features supported by kvm */
static DECLARE_BITMAP(kvm_s390_available_cpu_feat, KVM_S390_VM_CPU_FEAT_NR_BITS);
/* available subfunctions indicated via query / "test bit" */

static struct kvm_s390_vm_cpu_subfunc kvm_s390_available_subfunc;


static struct gmap_notifier gmap_notifier;

static struct gmap_notifier vsie_gmap_notifier;

debug_info_t *kvm_s390_dbf;

/* Section: not file related */


int kvm_arch_hardware_enable(void)
{
	/* every s390 is virtualization enabled ;-) */
	return 0;
}

Contributors
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Heiko Carstens 7 63.64% 1 50.00%
Alexander Graf 4 36.36% 1 50.00%
Total 11 100.00% 2 100.00%

static void kvm_gmap_notifier(struct gmap *gmap, unsigned long start,
			      unsigned long end);

/*
 * This callback is executed during stop_machine(). All CPUs are therefore
 * temporarily stopped. In order not to change guest behavior, we have to
 * disable preemption whenever we touch the epoch of kvm and the VCPUs,
 * so a CPU won't be stopped while calculating with the epoch.
 */


static int kvm_clock_sync(struct notifier_block *notifier, unsigned long val,
			  void *v)
{
	struct kvm *kvm;
	struct kvm_vcpu *vcpu;
	int i;
	unsigned long long *delta = v;

	list_for_each_entry(kvm, &vm_list, vm_list) {
		kvm->arch.epoch -= *delta;
		kvm_for_each_vcpu(i, vcpu, kvm) {
			vcpu->arch.sie_block->epoch -= *delta;
			if (vcpu->arch.cputm_enabled)
				vcpu->arch.cputm_start += *delta;
			if (vcpu->arch.vsie_block)
				vcpu->arch.vsie_block->epoch -= *delta;
		}
	}
	return NOTIFY_OK;
}

Contributors
Person Tokens Prop Commits CommitProp
Fan Zhang 83 69.75% 1 33.33%
David Hildenbrand 36 30.25% 2 66.67%
Total 119 100.00% 3 100.00%


static struct notifier_block kvm_clock_notifier = {
	.notifier_call = kvm_clock_sync,
};



int kvm_arch_hardware_setup(void)
{
	gmap_notifier.notifier_call = kvm_gmap_notifier;
	gmap_register_pte_notifier(&gmap_notifier);
	vsie_gmap_notifier.notifier_call = kvm_s390_vsie_gmap_notifier;
	gmap_register_pte_notifier(&vsie_gmap_notifier);
	atomic_notifier_chain_register(&s390_epoch_delta_notifier,
				       &kvm_clock_notifier);
	return 0;
}

Contributors
Person Tokens Prop Commits CommitProp
David Hildenbrand 12 27.91% 1 20.00%
Christian Bornträger 11 25.58% 1 20.00%
Heiko Carstens 10 23.26% 1 20.00%
Fan Zhang 9 20.93% 1 20.00%
Martin Schwidefsky 1 2.33% 1 20.00%
Total 43 100.00% 5 100.00%



void kvm_arch_hardware_unsetup(void)
{
	gmap_unregister_pte_notifier(&gmap_notifier);
	gmap_unregister_pte_notifier(&vsie_gmap_notifier);
	atomic_notifier_chain_unregister(&s390_epoch_delta_notifier,
					 &kvm_clock_notifier);
}

Contributors
Person Tokens Prop Commits CommitProp
Fan Zhang 9 32.14% 1 20.00%
Christian Bornträger 7 25.00% 1 20.00%
David Hildenbrand 6 21.43% 1 20.00%
Heiko Carstens 5 17.86% 1 20.00%
Martin Schwidefsky 1 3.57% 1 20.00%
Total 28 100.00% 5 100.00%



static void allow_cpu_feat(unsigned long nr)
{
	set_bit_inv(nr, kvm_s390_available_cpu_feat);
}

Contributors
Person Tokens Prop Commits CommitProp
David Hildenbrand 9 52.94% 1 33.33%
Heiko Carstens 4 23.53% 1 33.33%
Christian Bornträger 4 23.53% 1 33.33%
Total 17 100.00% 3 100.00%



static inline int plo_test_bit(unsigned char nr)
{
	register unsigned long r0 asm("0") = (unsigned long) nr | 0x100;
	int cc;

	asm volatile(
		/* Parameter registers are ignored for "test bit" */
		"       plo     0,0,0,0(0)\n"
                "       ipm     %0\n"
                "       srl     %0,28\n"
                : "=d" (cc)
                : "d" (r0)
                : "cc");
	return cc == 0;
}

Contributors
Person Tokens Prop Commits CommitProp
David Hildenbrand 31 75.61% 1 33.33%
Christian Bornträger 5 12.20% 1 33.33%
Heiko Carstens 5 12.20% 1 33.33%
Total 41 100.00% 3 100.00%



static void kvm_s390_cpu_feat_init(void)
{
	int i;

	for (i = 0; i < 256; ++i) {
		if (plo_test_bit(i))
			kvm_s390_available_subfunc.plo[i >> 3] |= 0x80 >> (i & 7);
	}

	if (test_facility(28)) /* TOD-clock steering */
		ptff(kvm_s390_available_subfunc.ptff,
		     sizeof(kvm_s390_available_subfunc.ptff),
		     PTFF_QAF);

	if (test_facility(17)) { /* MSA */
		__cpacf_query(CPACF_KMAC, (cpacf_mask_t *)
			      kvm_s390_available_subfunc.kmac);
		__cpacf_query(CPACF_KMC, (cpacf_mask_t *)
			      kvm_s390_available_subfunc.kmc);
		__cpacf_query(CPACF_KM, (cpacf_mask_t *)
			      kvm_s390_available_subfunc.km);
		__cpacf_query(CPACF_KIMD, (cpacf_mask_t *)
			      kvm_s390_available_subfunc.kimd);
		__cpacf_query(CPACF_KLMD, (cpacf_mask_t *)
			      kvm_s390_available_subfunc.klmd);
	}
	if (test_facility(76)) /* MSA3 */
		__cpacf_query(CPACF_PCKMO, (cpacf_mask_t *)
			      kvm_s390_available_subfunc.pckmo);
	if (test_facility(77)) { /* MSA4 */
		__cpacf_query(CPACF_KMCTR, (cpacf_mask_t *)
			      kvm_s390_available_subfunc.kmctr);
		__cpacf_query(CPACF_KMF, (cpacf_mask_t *)
			      kvm_s390_available_subfunc.kmf);
		__cpacf_query(CPACF_KMO, (cpacf_mask_t *)
			      kvm_s390_available_subfunc.kmo);
		__cpacf_query(CPACF_PCC, (cpacf_mask_t *)
			      kvm_s390_available_subfunc.pcc);
	}
	if (test_facility(57)) /* MSA5 */
		__cpacf_query(CPACF_PPNO, (cpacf_mask_t *)
			      kvm_s390_available_subfunc.ppno);

	if (MACHINE_HAS_ESOP)
		allow_cpu_feat(KVM_S390_VM_CPU_FEAT_ESOP);
	/*
         * We need SIE support, ESOP (PROT_READ protection for gmap_shadow),
         * 64bit SCAO (SCA passthrough) and IDTE (for gmap_shadow unshadowing).
         */
	if (!sclp.has_sief2 || !MACHINE_HAS_ESOP || !sclp.has_64bscao ||
	    !test_facility(3) || !nested)
		return;
	allow_cpu_feat(KVM_S390_VM_CPU_FEAT_SIEF2);
	if (sclp.has_64bscao)
		allow_cpu_feat(KVM_S390_VM_CPU_FEAT_64BSCAO);
	if (sclp.has_siif)
		allow_cpu_feat(KVM_S390_VM_CPU_FEAT_SIIF);
	if (sclp.has_gpere)
		allow_cpu_feat(KVM_S390_VM_CPU_FEAT_GPERE);
	if (sclp.has_gsls)
		allow_cpu_feat(KVM_S390_VM_CPU_FEAT_GSLS);
	if (sclp.has_ib)
		allow_cpu_feat(KVM_S390_VM_CPU_FEAT_IB);
	if (sclp.has_cei)
		allow_cpu_feat(KVM_S390_VM_CPU_FEAT_CEI);
	if (sclp.has_ibs)
		allow_cpu_feat(KVM_S390_VM_CPU_FEAT_IBS);
	/*
         * KVM_S390_VM_CPU_FEAT_SKEY: Wrong shadow of PTE.I bits will make
         * all skey handling functions read/set the skey from the PGSTE
         * instead of the real storage key.
         *
         * KVM_S390_VM_CPU_FEAT_CMMA: Wrong shadow of PTE.I bits will make
         * pages being detected as preserved although they are resident.
         *
         * KVM_S390_VM_CPU_FEAT_PFMFI: Wrong shadow of PTE.I bits will
         * have the same effect as for KVM_S390_VM_CPU_FEAT_SKEY.
         *
         * For KVM_S390_VM_CPU_FEAT_SKEY, KVM_S390_VM_CPU_FEAT_CMMA and
         * KVM_S390_VM_CPU_FEAT_PFMFI, all PTE.I and PGSTE bits have to be
         * correctly shadowed. We can do that for the PGSTE but not for PTE.I.
         *
         * KVM_S390_VM_CPU_FEAT_SIGPIF: Wrong SCB addresses in the SCA. We
         * cannot easily shadow the SCA because of the ipte lock.
         */
}

Contributors
Person Tokens Prop Commits CommitProp
David Hildenbrand 313 84.37% 12 75.00%
Martin Schwidefsky 44 11.86% 1 6.25%
Linus Torvalds 9 2.43% 1 6.25%
Heiko Carstens 3 0.81% 1 6.25%
Carsten Otte 2 0.54% 1 6.25%
Total 371 100.00% 16 100.00%



int kvm_arch_init(void *opaque)
{
	kvm_s390_dbf = debug_register("kvm-trace", 32, 1, 7 * sizeof(long));
	if (!kvm_s390_dbf)
		return -ENOMEM;

	if (debug_register_view(kvm_s390_dbf, &debug_sprintf_view)) {
		debug_unregister(kvm_s390_dbf);
		return -ENOMEM;
	}

	kvm_s390_cpu_feat_init();

	/* Register floating interrupt controller interface. */
	return kvm_register_device_ops(&kvm_flic_ops, KVM_DEV_TYPE_FLIC);
}

Contributors
Person Tokens Prop Commits CommitProp
Christian Bornträger 48 68.57% 1 25.00%
Heiko Carstens 11 15.71% 1 25.00%
Cornelia Huck 8 11.43% 1 25.00%
David Hildenbrand 3 4.29% 1 25.00%
Total 70 100.00% 4 100.00%



void kvm_arch_exit(void)
{
	debug_unregister(kvm_s390_dbf);
}

Contributors
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Christian Bornträger 12 100.00% 1 100.00%
Total 12 100.00% 1 100.00%

/* Section: device related */


long kvm_arch_dev_ioctl(struct file *filp,
			unsigned int ioctl, unsigned long arg)
{
	if (ioctl == KVM_S390_ENABLE_SIE)
		return s390_enable_sie();
	return -EINVAL;
}

Contributors
Person Tokens Prop Commits CommitProp
Heiko Carstens 32 100.00% 1 100.00%
Total 32 100.00% 1 100.00%



int kvm_vm_ioctl_check_extension(struct kvm *kvm, long ext)
{
	int r;

	switch (ext) {
	case KVM_CAP_S390_PSW:
	case KVM_CAP_S390_GMAP:
	case KVM_CAP_SYNC_MMU:
#ifdef CONFIG_KVM_S390_UCONTROL
	case KVM_CAP_S390_UCONTROL:
#endif
	case KVM_CAP_ASYNC_PF:
	case KVM_CAP_SYNC_REGS:
	case KVM_CAP_ONE_REG:
	case KVM_CAP_ENABLE_CAP:
	case KVM_CAP_S390_CSS_SUPPORT:
	case KVM_CAP_IOEVENTFD:
	case KVM_CAP_DEVICE_CTRL:
	case KVM_CAP_ENABLE_CAP_VM:
	case KVM_CAP_S390_IRQCHIP:
	case KVM_CAP_VM_ATTRIBUTES:
	case KVM_CAP_MP_STATE:
	case KVM_CAP_IMMEDIATE_EXIT:
	case KVM_CAP_S390_INJECT_IRQ:
	case KVM_CAP_S390_USER_SIGP:
	case KVM_CAP_S390_USER_STSI:
	case KVM_CAP_S390_SKEYS:
	case KVM_CAP_S390_IRQ_STATE:
	case KVM_CAP_S390_USER_INSTR0:
		r = 1;
		break;
	case KVM_CAP_S390_MEM_OP:
		r = MEM_OP_MAX_SIZE;
		break;
	case KVM_CAP_NR_VCPUS:
	case KVM_CAP_MAX_VCPUS:
		r = KVM_S390_BSCA_CPU_SLOTS;
		if (!kvm_s390_use_sca_entries())
			r = KVM_MAX_VCPUS;
		else if (sclp.has_esca && sclp.has_64bscao)
			r = KVM_S390_ESCA_CPU_SLOTS;
		break;
	case KVM_CAP_NR_MEMSLOTS:
		r = KVM_USER_MEM_SLOTS;
		break;
	case KVM_CAP_S390_COW:
		r = MACHINE_HAS_ESOP;
		break;
	case KVM_CAP_S390_VECTOR_REGISTERS:
		r = MACHINE_HAS_VX;
		break;
	case KVM_CAP_S390_RI:
		r = test_facility(64);
		break;
	default:
		r = 0;
	}
	return r;
}

Contributors
Person Tokens Prop Commits CommitProp
Carsten Otte 35 18.92% 4 11.43%
David Hildenbrand 31 16.76% 5 14.29%
Christian Bornträger 26 14.05% 5 14.29%
Cornelia Huck 15 8.11% 5 14.29%
Fan Zhang 11 5.95% 1 2.86%
Jens Freimann 9 4.86% 3 8.57%
Heiko Carstens 8 4.32% 1 2.86%
Eric Farman 8 4.32% 1 2.86%
Nick Wang 8 4.32% 1 2.86%
Thomas Huth 8 4.32% 1 2.86%
Dominik Dingel 6 3.24% 2 5.71%
Alexander Graf 6 3.24% 1 2.86%
Eugene (jno) Dvurechenski 4 2.16% 1 2.86%
Paolo Bonzini 3 1.62% 1 2.86%
Jason J. Herne 3 1.62% 1 2.86%
Ekaterina Tumanova 3 1.62% 1 2.86%
Martin Schwidefsky 1 0.54% 1 2.86%
Total 185 100.00% 35 100.00%



static void kvm_s390_sync_dirty_log(struct kvm *kvm,
					struct kvm_memory_slot *memslot)
{
	gfn_t cur_gfn, last_gfn;
	unsigned long address;
	struct gmap *gmap = kvm->arch.gmap;

	/* Loop over all guest pages */
	last_gfn = memslot->base_gfn + memslot->npages;
	for (cur_gfn = memslot->base_gfn; cur_gfn <= last_gfn; cur_gfn++) {
		address = gfn_to_hva_memslot(memslot, cur_gfn);

		if (test_and_clear_guest_dirty(gmap->mm, address))
			mark_page_dirty(kvm, cur_gfn);
		if (fatal_signal_pending(current))
			return;
		cond_resched();
	}
}

Contributors
Person Tokens Prop Commits CommitProp
Jason J. Herne 89 87.25% 1 20.00%
Christian Bornträger 8 7.84% 2 40.00%
Martin Schwidefsky 5 4.90% 2 40.00%
Total 102 100.00% 5 100.00%

/* Section: vm related */
static void sca_del_vcpu(struct kvm_vcpu *vcpu);

/*
 * Get (and clear) the dirty memory log for a memory slot.
 */


int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm,
			       struct kvm_dirty_log *log)
{
	int r;
	unsigned long n;
	struct kvm_memslots *slots;
	struct kvm_memory_slot *memslot;
	int is_dirty = 0;

	if (kvm_is_ucontrol(kvm))
		return -EINVAL;

	mutex_lock(&kvm->slots_lock);

	r = -EINVAL;
	if (log->slot >= KVM_USER_MEM_SLOTS)
		goto out;

	slots = kvm_memslots(kvm);
	memslot = id_to_memslot(slots, log->slot);
	r = -ENOENT;
	if (!memslot->dirty_bitmap)
		goto out;

	kvm_s390_sync_dirty_log(kvm, memslot);
	r = kvm_get_dirty_log(kvm, log, &is_dirty);
	if (r)
		goto out;

	/* Clear the dirty log */
	if (is_dirty) {
		n = kvm_dirty_bitmap_bytes(memslot);
		memset(memslot->dirty_bitmap, 0, n);
	}
	r = 0;
out:
	mutex_unlock(&kvm->slots_lock);
	return r;
}

Contributors
Person Tokens Prop Commits CommitProp
Jason J. Herne 131 75.72% 1 25.00%
Heiko Carstens 18 10.40% 1 25.00%
Paolo Bonzini 13 7.51% 1 25.00%
Janosch Frank 11 6.36% 1 25.00%
Total 173 100.00% 4 100.00%



static void icpt_operexc_on_all_vcpus(struct kvm *kvm)
{
	unsigned int i;
	struct kvm_vcpu *vcpu;

	kvm_for_each_vcpu(i, vcpu, kvm) {
		kvm_s390_sync_request(KVM_REQ_ICPT_OPEREXC, vcpu);
	}
}

Contributors
Person Tokens Prop Commits CommitProp
David Hildenbrand 37 100.00% 1 100.00%
Total 37 100.00% 1 100.00%



static int kvm_vm_ioctl_enable_cap(struct kvm *kvm, struct kvm_enable_cap *cap)
{
	int r;

	if (cap->flags)
		return -EINVAL;

	switch (cap->cap) {
	case KVM_CAP_S390_IRQCHIP:
		VM_EVENT(kvm, 3, "%s", "ENABLE: CAP_S390_IRQCHIP");
		kvm->arch.use_irqchip = 1;
		r = 0;
		break;
	case KVM_CAP_S390_USER_SIGP:
		VM_EVENT(kvm, 3, "%s", "ENABLE: CAP_S390_USER_SIGP");
		kvm->arch.user_sigp = 1;
		r = 0;
		break;
	case KVM_CAP_S390_VECTOR_REGISTERS:
		mutex_lock(&kvm->lock);
		if (kvm->created_vcpus) {
			r = -EBUSY;
		} else if (MACHINE_HAS_VX) {
			set_kvm_facility(kvm->arch.model.fac_mask, 129);
			set_kvm_facility(kvm->arch.model.fac_list, 129);
			if (test_facility(134)) {
				set_kvm_facility(kvm->arch.model.fac_mask, 134);
				set_kvm_facility(kvm->arch.model.fac_list, 134);
			}
			if (test_facility(135)) {
				set_kvm_facility(kvm->arch.model.fac_mask, 135);
				set_kvm_facility(kvm->arch.model.fac_list, 135);
			}
			r = 0;
		} else
			r = -EINVAL;
		mutex_unlock(&kvm->lock);
		VM_EVENT(kvm, 3, "ENABLE: CAP_S390_VECTOR_REGISTERS %s",
			 r ? "(not available)" : "(success)");
		break;
	case KVM_CAP_S390_RI:
		r = -EINVAL;
		mutex_lock(&kvm->lock);
		if (kvm->created_vcpus) {
			r = -EBUSY;
		} else if (test_facility(64)) {
			set_kvm_facility(kvm->arch.model.fac_mask, 64);
			set_kvm_facility(kvm->arch.model.fac_list, 64);
			r = 0;
		}
		mutex_unlock(&kvm->lock);
		VM_EVENT(kvm, 3, "ENABLE: CAP_S390_RI %s",
			 r ? "(not available)" : "(success)");
		break;
	case KVM_CAP_S390_USER_STSI:
		VM_EVENT(kvm, 3, "%s", "ENABLE: CAP_S390_USER_STSI");
		kvm->arch.user_stsi = 1;
		r = 0;
		break;
	case KVM_CAP_S390_USER_INSTR0:
		VM_EVENT(kvm, 3, "%s", "ENABLE: CAP_S390_USER_INSTR0");
		kvm->arch.user_instr0 = 1;
		icpt_operexc_on_all_vcpus(kvm);
		r = 0;
		break;
	default:
		r = -EINVAL;
		break;
	}
	return r;
}

Contributors
Person Tokens Prop Commits CommitProp
Fan Zhang 90 21.74% 1 7.14%
David Hildenbrand 81 19.57% 4 28.57%
Cornelia Huck 63 15.22% 2 14.29%
Christian Bornträger 48 11.59% 1 7.14%
Maxim Samoylov 35 8.45% 1 7.14%
Guenther Hutzl 35 8.45% 1 7.14%
Michael Müller 29 7.00% 1 7.14%
Ekaterina Tumanova 16 3.86% 1 7.14%
Eric Farman 15 3.62% 1 7.14%
Paolo Bonzini 2 0.48% 1 7.14%
Total 414 100.00% 14 100.00%



static int kvm_s390_get_mem_control(struct kvm *kvm, struct kvm_device_attr *attr)
{
	int ret;

	switch (attr->attr) {
	case KVM_S390_VM_MEM_LIMIT_SIZE:
		ret = 0;
		VM_EVENT(kvm, 3, "QUERY: max guest memory: %lu bytes",
			 kvm->arch.mem_limit);
		if (put_user(kvm->arch.mem_limit, (u64 __user *)attr->addr))
			ret = -EFAULT;
		break;
	default:
		ret = -ENXIO;
		break;
	}
	return ret;
}

Contributors
Person Tokens Prop Commits CommitProp
Dominik Dingel 71 83.53% 3 75.00%
Christian Bornträger 14 16.47% 1 25.00%
Total 85 100.00% 4 100.00%



static int kvm_s390_set_mem_control(struct kvm *kvm, struct kvm_device_attr *attr)
{
	int ret;
	unsigned int idx;
	switch (attr->attr) {
	case KVM_S390_VM_MEM_ENABLE_CMMA:
		ret = -ENXIO;
		if (!sclp.has_cmma)
			break;

		ret = -EBUSY;
		VM_EVENT(kvm, 3, "%s", "ENABLE: CMMA support");
		mutex_lock(&kvm->lock);
		if (!kvm->created_vcpus) {
			kvm->arch.use_cmma = 1;
			ret = 0;
		}
		mutex_unlock(&kvm->lock);
		break;
	case KVM_S390_VM_MEM_CLR_CMMA:
		ret = -ENXIO;
		if (!sclp.has_cmma)
			break;
		ret = -EINVAL;
		if (!kvm->arch.use_cmma)
			break;

		VM_EVENT(kvm, 3, "%s", "RESET: CMMA states");
		mutex_lock(&kvm->lock);
		idx = srcu_read_lock(&kvm->srcu);
		s390_reset_cmma(kvm->arch.gmap->mm);
		srcu_read_unlock(&kvm->srcu, idx);
		mutex_unlock(&kvm->lock);
		ret = 0;
		break;
	case KVM_S390_VM_MEM_LIMIT_SIZE: {
		unsigned long new_limit;

		if (kvm_is_ucontrol(kvm))
			return -EINVAL;

		if (get_user(new_limit, (u64 __user *)attr->addr))
			return -EFAULT;

		if (kvm->arch.mem_limit != KVM_S390_NO_MEM_LIMIT &&
		    new_limit > kvm->arch.mem_limit)
			return -E2BIG;

		if (!new_limit)
			return -EINVAL;

		/* gmap_create takes last usable address */
		if (new_limit != KVM_S390_NO_MEM_LIMIT)
			new_limit -= 1;

		ret = -EBUSY;
		mutex_lock(&kvm->lock);
		if (!kvm->created_vcpus) {
			/* gmap_create will round the limit up */
			struct gmap *new = gmap_create(current->mm, new_limit);

			if (!new) {
				ret = -ENOMEM;
			} else {
				gmap_remove(kvm->arch.gmap);
				new->private = kvm;
				kvm->arch.gmap = new;
				ret = 0;
			}
		}
		mutex_unlock(&kvm->lock);
		VM_EVENT(kvm, 3, "SET: max guest address: %lu", new_limit);
		VM_EVENT(kvm, 3, "New guest asce: 0x%pK",
			 (void *) kvm->arch.gmap->asce);
		break;
	}
	default:
		ret = -ENXIO;
		break;
	}
	return ret;
}

Contributors
Person Tokens Prop Commits CommitProp
Dominik Dingel 289 71.01% 6 40.00%
Christian Bornträger 32 7.86% 1 6.67%
Cornelia Huck 26 6.39% 2 13.33%
Heiko Carstens 21 5.16% 1 6.67%
David Hildenbrand 17 4.18% 2 13.33%
Carsten Otte 14 3.44% 1 6.67%
Paolo Bonzini 4 0.98% 1 6.67%
Martin Schwidefsky 4 0.98% 1 6.67%
Total 407 100.00% 15 100.00%

static void kvm_s390_vcpu_crypto_setup(struct kvm_vcpu *vcpu);



static int kvm_s390_vm_set_crypto(struct kvm *kvm, struct kvm_device_attr *attr)
{
	struct kvm_vcpu *vcpu;
	int i;

	if (!test_kvm_facility(kvm, 76))
		return -EINVAL;

	mutex_lock(&kvm->lock);
	switch (attr->attr) {
	case KVM_S390_VM_CRYPTO_ENABLE_AES_KW:
		get_random_bytes(
			kvm->arch.crypto.crycb->aes_wrapping_key_mask,
			sizeof(kvm->arch.crypto.crycb->aes_wrapping_key_mask));
		kvm->arch.crypto.aes_kw = 1;
		VM_EVENT(kvm, 3, "%s", "ENABLE: AES keywrapping support");
		break;
	case KVM_S390_VM_CRYPTO_ENABLE_DEA_KW:
		get_random_bytes(
			kvm->arch.crypto.crycb->dea_wrapping_key_mask,
			sizeof(kvm->arch.crypto.crycb->dea_wrapping_key_mask));
		kvm->arch.crypto.dea_kw = 1;
		VM_EVENT(kvm, 3, "%s", "ENABLE: DEA keywrapping support");
		break;
	case KVM_S390_VM_CRYPTO_DISABLE_AES_KW:
		kvm->arch.crypto.aes_kw = 0;
		memset(kvm->arch.crypto.crycb->aes_wrapping_key_mask, 0,
			sizeof(kvm->arch.crypto.crycb->aes_wrapping_key_mask));
		VM_EVENT(kvm, 3, "%s", "DISABLE: AES keywrapping support");
		break;
	case KVM_S390_VM_CRYPTO_DISABLE_DEA_KW:
		kvm->arch.crypto.dea_kw = 0;
		memset(kvm->arch.crypto.crycb->dea_wrapping_key_mask, 0,
			sizeof(kvm->arch.crypto.crycb->dea_wrapping_key_mask));
		VM_EVENT(kvm, 3, "%s", "DISABLE: DEA keywrapping support");
		break;
	default:
		mutex_unlock(&kvm->lock);
		return -ENXIO;
	}

	kvm_for_each_vcpu(i, vcpu, kvm) {
		kvm_s390_vcpu_crypto_setup(vcpu);
		exit_sie(vcpu);
	}
	mutex_unlock(&kvm->lock);
	return 0;
}

Contributors
Person Tokens Prop Commits CommitProp
Tony Krowiak 259 84.64% 1 33.33%
Christian Bornträger 44 14.38% 1 33.33%
Michael Müller 3 0.98% 1 33.33%
Total 306 100.00% 3 100.00%



static int kvm_s390_set_tod_high(struct kvm *kvm, struct kvm_device_attr *attr)
{
	u8 gtod_high;

	if (copy_from_user(&gtod_high, (void __user *)attr->addr,
					   sizeof(gtod_high)))
		return -EFAULT;

	if (gtod_high != 0)
		return -EINVAL;
	VM_EVENT(kvm, 3, "SET: TOD extension: 0x%x", gtod_high);

	return 0;
}

Contributors
Person Tokens Prop Commits CommitProp
Jason J. Herne 58 84.06% 1 33.33%
Christian Bornträger 11 15.94% 2 66.67%
Total 69 100.00% 3 100.00%



static int kvm_s390_set_tod_low(struct kvm *kvm, struct kvm_device_attr *attr)
{
	u64 gtod;

	if (copy_from_user(&gtod, (void __user *)attr->addr, sizeof(gtod)))
		return -EFAULT;

	kvm_s390_set_tod_clock(kvm, gtod);
	VM_EVENT(kvm, 3, "SET: TOD base: 0x%llx", gtod);
	return 0;
}

Contributors
Person Tokens Prop Commits CommitProp
Jason J. Herne 51 77.27% 1 20.00%
Christian Bornträger 13 19.70% 3 60.00%
David Hildenbrand 2 3.03% 1 20.00%
Total 66 100.00% 5 100.00%



static int kvm_s390_set_tod(struct kvm *kvm, struct kvm_device_attr *attr)
{
	int ret;

	if (attr->flags)
		return -EINVAL;

	switch (attr->attr) {
	case KVM_S390_VM_TOD_HIGH:
		ret = kvm_s390_set_tod_high(kvm, attr);
		break;
	case KVM_S390_VM_TOD_LOW:
		ret = kvm_s390_set_tod_low(kvm, attr);
		break;
	default:
		ret = -ENXIO;
		break;
	}
	return ret;
}

Contributors
Person Tokens Prop Commits CommitProp
Jason J. Herne 73 100.00% 1 100.00%
Total 73 100.00% 1 100.00%



static int kvm_s390_get_tod_high(struct kvm *kvm, struct kvm_device_attr *attr)
{
	u8 gtod_high = 0;

	if (copy_to_user((void __user *)attr->addr, &gtod_high,
					 sizeof(gtod_high)))
		return -EFAULT;
	VM_EVENT(kvm, 3, "QUERY: TOD extension: 0x%x", gtod_high);

	return 0;
}

Contributors
Person Tokens Prop Commits CommitProp
Jason J. Herne 50 81.97% 1 33.33%
Christian Bornträger 11 18.03% 2 66.67%
Total 61 100.00% 3 100.00%



static int kvm_s390_get_tod_low(struct kvm *kvm, struct kvm_device_attr *attr)
{
	u64 gtod;

	gtod = kvm_s390_get_tod_clock_fast(kvm);
	if (copy_to_user((void __user *)attr->addr, &gtod, sizeof(gtod)))
		return -EFAULT;
	VM_EVENT(kvm, 3, "QUERY: TOD base: 0x%llx", gtod);

	return 0;
}

Contributors
Person Tokens Prop Commits CommitProp
Jason J. Herne 51 77.27% 1 20.00%
Christian Bornträger 11 16.67% 2 40.00%
David Hildenbrand 3 4.55% 1 20.00%
Fan Zhang 1 1.52% 1 20.00%
Total 66 100.00% 5 100.00%



static int kvm_s390_get_tod(struct kvm *kvm, struct kvm_device_attr *attr)
{
	int ret;

	if (attr->flags)
		return -EINVAL;

	switch (attr->attr) {
	case KVM_S390_VM_TOD_HIGH:
		ret = kvm_s390_get_tod_high(kvm, attr);
		break;
	case KVM_S390_VM_TOD_LOW:
		ret = kvm_s390_get_tod_low(kvm, attr);
		break;
	default:
		ret = -ENXIO;
		break;
	}
	return ret;
}

Contributors
Person Tokens Prop Commits CommitProp
Jason J. Herne 73 100.00% 1 100.00%
Total 73 100.00% 1 100.00%



static int kvm_s390_set_processor(struct kvm *kvm, struct kvm_device_attr *attr)
{
	struct kvm_s390_vm_cpu_processor *proc;
	u16 lowest_ibc, unblocked_ibc;
	int ret = 0;

	mutex_lock(&kvm->lock);
	if (kvm->created_vcpus) {
		ret = -EBUSY;
		goto out;
	}
	proc = kzalloc(sizeof(*proc), GFP_KERNEL);
	if (!proc) {
		ret = -ENOMEM;
		goto out;
	}
	if (!copy_from_user(proc, (void __user *)attr->addr,
			    sizeof(*proc))) {
		kvm->arch.model.cpuid = proc->cpuid;
		lowest_ibc = sclp.ibc >> 16 & 0xfff;
		unblocked_ibc = sclp.ibc & 0xfff;
		if (lowest_ibc && proc->ibc) {
			if (proc->ibc > unblocked_ibc)
				kvm->arch.model.ibc = unblocked_ibc;
			else if (proc->ibc < lowest_ibc)
				kvm->arch.model.ibc = lowest_ibc;
			else
				kvm->arch.model.ibc = proc->ibc;
		}
		memcpy(kvm->arch.model.fac_list, proc->fac_list,
		       S390_ARCH_FAC_LIST_SIZE_BYTE);
		VM_EVENT(kvm, 3, "SET: guest ibc: 0x%4.4x, guest cpuid: 0x%16.16llx",
			 kvm->arch.model.ibc,
			 kvm->arch.model.cpuid);
		VM_EVENT(kvm, 3, "SET: guest faclist: 0x%16.16llx.%16.16llx.%16.16llx",
			 kvm->arch.model.fac_list[0],
			 kvm->arch.model.fac_list[1],
			 kvm->arch.model.fac_list[2]);
	} else
		ret = -EFAULT;
	kfree(proc);
out:
	mutex_unlock(&kvm->lock);
	return ret;
}

Contributors
Person Tokens Prop Commits CommitProp
Michael Müller 164 53.59% 1 14.29%
David Hildenbrand 74 24.18% 4 57.14%
Christian Bornträger 67 21.90% 1 14.29%
Paolo Bonzini 1 0.33% 1 14.29%
Total 306 100.00% 7 100.00%



static int kvm_s390_set_processor_feat(struct kvm *kvm,
				       struct kvm_device_attr *attr)
{
	struct kvm_s390_vm_cpu_feat data;
	int ret = -EBUSY;

	if (copy_from_user(&data, (void __user *)attr->addr, sizeof(data)))
		return -EFAULT;
	if (!bitmap_subset((unsigned long *) data.feat,
			   kvm_s390_available_cpu_feat,
			   KVM_S390_VM_CPU_FEAT_NR_BITS))
		return -EINVAL;

	mutex_lock(&kvm->lock);
	if (!atomic_read(&kvm->online_vcpus)) {
		bitmap_copy(kvm->arch.cpu_feat, (unsigned long *) data.feat,
			    KVM_S390_VM_CPU_FEAT_NR_BITS);
		ret = 0;
	}
	mutex_unlock(&kvm->lock);
	return ret;
}

Contributors
Person Tokens Prop Commits CommitProp
David Hildenbrand 105 80.15% 2 66.67%
Michael Müller 26 19.85% 1 33.33%
Total 131 100.00% 3 100.00%



static int kvm_s390_set_processor_subfunc(struct kvm *kvm,
					  struct kvm_device_attr *attr)
{
	/*
         * Once supported by kernel + hw, we have to store the subfunctions
         * in kvm->arch and remember that user space configured them.
         */
	return -ENXIO;
}

Contributors
Person Tokens Prop Commits CommitProp
David Hildenbrand 21 100.00% 1 100.00%
Total 21 100.00% 1 100.00%



static int kvm_s390_set_cpu_model(struct kvm *kvm, struct kvm_device_attr *attr)
{
	int ret = -ENXIO;

	switch (attr->attr) {
	case KVM_S390_VM_CPU_PROCESSOR:
		ret = kvm_s390_set_processor(kvm, attr);
		break;
	case KVM_S390_VM_CPU_PROCESSOR_FEAT:
		ret = kvm_s390_set_processor_feat(kvm, attr);
		break;
	case KVM_S390_VM_CPU_PROCESSOR_SUBFUNC:
		ret = kvm_s390_set_processor_subfunc(kvm, attr);
		break;
	}
	return ret;
}

Contributors
Person Tokens Prop Commits CommitProp
Michael Müller 46 63.89% 1 33.33%
David Hildenbrand 26 36.11% 2 66.67%
Total 72 100.00% 3 100.00%



static int kvm_s390_get_processor(struct kvm *kvm, struct kvm_device_attr *attr)
{
	struct kvm_s390_vm_cpu_processor *proc;
	int ret = 0;

	proc = kzalloc(sizeof(*proc), GFP_KERNEL);
	if (!proc) {
		ret = -ENOMEM;
		goto out;
	}
	proc->cpuid = kvm->arch.model.cpuid;
	proc->ibc = kvm->arch.model.ibc;
	memcpy(&proc->fac_list, kvm->arch.model.fac_list,
	       S390_ARCH_FAC_LIST_SIZE_BYTE);
	VM_EVENT(kvm, 3, "GET: guest ibc: 0x%4.4x, guest cpuid: 0x%16.16llx",
		 kvm->arch.model.ibc,
		 kvm->arch.model.cpuid);
	VM_EVENT(kvm, 3, "GET: guest faclist: 0x%16.16llx.%16.16llx.%16.16llx",
		 kvm->arch.model.fac_list[0],
		 kvm->arch.model.fac_list[1],
		 kvm->arch.model.fac_list[2]);
	if (copy_to_user((void __user *)attr->addr, proc, sizeof(*proc)))
		ret = -EFAULT;
	kfree(proc);
out:
	return ret;
}

Contributors
Person Tokens Prop Commits CommitProp
Michael Müller 131 65.50% 1 25.00%
Christian Bornträger 67 33.50% 1 25.00%
David Hildenbrand 2 1.00% 2 50.00%
Total 200 100.00% 4 100.00%



static int kvm_s390_get_machine(struct kvm *kvm, struct kvm_device_attr *attr)
{
	struct kvm_s390_vm_cpu_machine *mach;
	int ret = 0;

	mach = kzalloc(sizeof(*mach), GFP_KERNEL);
	if (!mach) {
		ret = -ENOMEM;
		goto out;
	}
	get_cpu_id((struct cpuid *) &mach->cpuid);
	mach->ibc = sclp.ibc;
	memcpy(&mach->fac_mask, kvm->arch.model.fac_mask,
	       S390_ARCH_FAC_LIST_SIZE_BYTE);
	memcpy((unsigned long *)&mach->fac_list, S390_lowcore.stfle_fac_list,
	       sizeof(S390_lowcore.stfle_fac_list));
	VM_EVENT(kvm, 3, "GET: host ibc:  0x%4.4x, host cpuid:  0x%16.16llx",
		 kvm->arch.model.ibc,
		 kvm->arch.model.cpuid);
	VM_EVENT(kvm, 3, "GET: host facmask:  0x%16.16llx.%16.16llx.%16.16llx",
		 mach->fac_mask[0],
		 mach->fac_mask[1],
		 mach->fac_mask[2]);
	VM_EVENT(kvm, 3, "GET: host faclist:  0x%16.16llx.%16.16llx.%16.16llx",
		 mach->fac_list[0],
		 mach->fac_list[1],
		 mach->fac_list[2]);
	if (copy_to_user((void __user *)attr->addr, mach, sizeof(*mach)))
		ret = -EFAULT;
	kfree(mach);
out:
	return ret;
}

Contributors
Person Tokens Prop Commits CommitProp
Michael Müller 144 60.25% 2 33.33%
Christian Bornträger 91 38.08% 2 33.33%
David Hildenbrand 4 1.67% 2 33.33%
Total 239 100.00% 6 100.00%



static int kvm_s390_get_processor_feat(struct kvm *kvm,
				       struct kvm_device_attr *attr)
{
	struct kvm_s390_vm_cpu_feat data;

	bitmap_copy((unsigned long *) data.feat, kvm->arch.cpu_feat,
		    KVM_S390_VM_CPU_FEAT_NR_BITS);
	if (copy_to_user((void __user *)attr->addr, &data, sizeof(data)))
		return -EFAULT;
	return 0;
}

Contributors
Person Tokens Prop Commits CommitProp
David Hildenbrand 69 100.00% 1 100.00%
Total 69 100.00% 1 100.00%



static int kvm_s390_get_machine_feat(struct kvm *kvm,
				     struct kvm_device_attr *attr)
{
	struct kvm_s390_vm_cpu_feat data;

	bitmap_copy((unsigned long *) data.feat,
		    kvm_s390_available_cpu_feat,
		    KVM_S390_VM_CPU_FEAT_NR_BITS);
	if (copy_to_user((void __user *)attr->addr, &data, sizeof(data)))
		return -EFAULT;
	return 0;
}

Contributors
Person Tokens Prop Commits CommitProp
David Hildenbrand 40 61.54% 1 50.00%
Michael Müller 25 38.46% 1 50.00%
Total 65 100.00% 2 100.00%



static int kvm_s390_get_processor_subfunc(struct kvm *kvm,
					  struct kvm_device_attr *attr)
{
	/*
         * Once we can actually configure subfunctions (kernel + hw support),
         * we have to check if they were already set by user space, if so copy
         * them from kvm->arch.
         */
	return -ENXIO;
}

Contributors
Person Tokens Prop Commits CommitProp
David Hildenbrand 21 100.00% 1 100.00%
Total 21 100.00% 1 100.00%



static int kvm_s390_get_machine_subfunc(struct kvm *kvm,
					struct kvm_device_attr *attr)
{
	if (copy_to_user((void __user *)attr->addr, &kvm_s390_available_subfunc,
	    sizeof(struct kvm_s390_vm_cpu_subfunc)))
		return -EFAULT;
	return 0;
}
Contributors
Person Tokens Prop Commits CommitProp
David Hildenbrand 41 89.13% 1 50.00%
Michael Müller 5 10.87% 1 50.00%
Total 46 100.00% 2 100.00%



static int kvm_s390_get_cpu_model(struct kvm *kvm, struct kvm_device_attr *attr)
{
	int ret = -ENXIO;

	switch (attr->attr) {
	case KVM_S390_VM_CPU_PROCESSOR:
		ret = kvm_s390_get_processor(kvm, attr);
		break;
	case KVM_S390_VM_CPU_MACHINE:
		ret = kvm_s390_get_machine(kvm, attr);
		break;
	case KVM_S390_VM_CPU_PROCESSOR_FEAT:
		ret = kvm_s390_get_processor_feat(kvm, attr);
		break;
	case KVM_S390_VM_CPU_MACHINE_FEAT:
		ret = kvm_s390_get_machine_feat(kvm, attr);
		break;
	case KVM_S390_VM_CPU_PROCESSOR_SUBFUNC:
		ret = kvm_s390_get_processor_subfunc(kvm, attr);
		break;
	case KVM_S390_VM_CPU_MACHINE_SUBFUNC:
		ret = kvm_s390_get_machine_subfunc(kvm, attr);
		break;
	}
	return ret;
}

Contributors
Person Tokens Prop Commits CommitProp
Michael Müller 59 53.15% 1 33.33%
David Hildenbrand 52 46.85% 2 66.67%
Total 111 100.00% 3 100.00%



static int kvm_s390_vm_set_attr(struct kvm *kvm, struct kvm_device_attr *attr)
{
	int ret;

	switch (attr->group) {
	case KVM_S390_VM_MEM_CTRL:
		ret = kvm_s390_set_mem_control(kvm, attr);
		break;
	case KVM_S390_VM_TOD:
		ret = kvm_s390_set_tod(kvm, attr);
		break;
	case KVM_S390_VM_CPU_MODEL:
		ret = kvm_s390_set_cpu_model(kvm, attr);
		break;
	case KVM_S390_VM_CRYPTO:
		ret = kvm_s390_vm_set_crypto(kvm, attr);
		break;
	default:
		ret = -ENXIO;
		break;
	}

	return ret;
}

Contributors
Person Tokens Prop Commits CommitProp
Dominik Dingel 31 34.83% 3 27.27%
Jason J. Herne 13 14.61% 1 9.09%
Michael Müller 13 14.61% 1 9.09%
Tony Krowiak 13 14.61% 1 9.09%
Carsten Otte 8 8.99% 2 18.18%
Heiko Carstens 7 7.87% 1 9.09%
Jan Kiszka 3 3.37% 1 9.09%
Christian Bornträger 1 1.12% 1 9.09%
Total 89 100.00% 11 100.00%



static int kvm_s390_vm_get_attr(struct kvm *kvm, struct kvm_device_attr *attr)
{
	int ret;

	switch (attr->group) {
	case KVM_S390_VM_MEM_CTRL:
		ret = kvm_s390_get_mem_control(kvm, attr);
		break;
	case KVM_S390_VM_TOD:
		ret = kvm_s390_get_tod(kvm, attr);
		break;
	case KVM_S390_VM_CPU_MODEL:
		ret = kvm_s390_get_cpu_model(kvm, attr);
		break;
	default:
		ret = -ENXIO;
		break;
	}

	return ret;
}

Contributors
Person Tokens Prop Commits CommitProp
Dominik Dingel 50 65.79% 2 50.00%
Jason J. Herne 13 17.11% 1 25.00%
Michael Müller 13 17.11% 1 25.00%
Total 76 100.00% 4 100.00%



static int kvm_s390_vm_has_attr(struct kvm *kvm, struct kvm_device_attr *attr)
{
	int ret;

	switch (attr->group) {
	case KVM_S390_VM_MEM_CTRL:
		switch (attr->attr) {
		case KVM_S390_VM_MEM_ENABLE_CMMA:
		case KVM_S390_VM_MEM_CLR_CMMA:
			ret = sclp.has_cmma ? 0 : -ENXIO;
			break;
		case KVM_S390_VM_MEM_LIMIT_SIZE:
			ret = 0;
			break;
		default:
			ret = -ENXIO;
			break;
		}
		break;
	case KVM_S390_VM_TOD:
		switch (attr->attr) {
		case KVM_S390_VM_TOD_LOW:
		case KVM_S390_VM_TOD_HIGH:
			ret = 0;
			break;
		default:
			ret = -ENXIO;
			break;
		}
		break;
	case KVM_S390_VM_CPU_MODEL:
		switch (attr->attr) {
		case KVM_S390_VM_CPU_PROCESSOR:
		case KVM_S390_VM_CPU_MACHINE:
		case KVM_S390_VM_CPU_PROCESSOR_FEAT:
		case KVM_S390_VM_CPU_MACHINE_FEAT:
		case KVM_S390_VM_CPU_MACHINE_SUBFUNC:
			ret = 0;
			break;
		/* configuring subfunctions is not supported yet */
		case KVM_S390_VM_CPU_PROCESSOR_SUBFUNC:
		default:
			ret = -ENXIO;
			break;
		}
		break;
	case KVM_S390_VM_CRYPTO:
		switch (attr->attr) {
		case KVM_S390_VM_CRYPTO_ENABLE_AES_KW:
		case KVM_S390_VM_CRYPTO_ENABLE_DEA_KW:
		case KVM_S390_VM_CRYPTO_DISABLE_AES_KW:
		case KVM_S390_VM_CRYPTO_DISABLE_DEA_KW:
			ret = 0;
			break;
		default:
			ret = -ENXIO;
			break;
		}
		break;
	default:
		ret = -ENXIO;
		break;
	}

	return ret;
}

Contributors
Person Tokens Prop Commits CommitProp
Dominik Dingel 70 36.65% 3 33.33%
Tony Krowiak 36 18.85% 1 11.11%
Michael Müller 30 15.71% 1 11.11%
Jason J. Herne 30 15.71% 1 11.11%
David Hildenbrand 25 13.09% 3 33.33%
Total 191 100.00% 9 100.00%



static long kvm_s390_get_skeys(struct kvm *kvm, struct kvm_s390_skeys *args)
{
	uint8_t *keys;
	uint64_t hva;
	int i, r = 0;

	if (args->flags != 0)
		return -EINVAL;

	/* Is this guest using storage keys? */
	if (!mm_use_skey(current->mm))
		return KVM_S390_GET_SKEYS_NONE;

	/* Enforce sane limit on memory allocation */
	if (args->count < 1 || args->count > KVM_S390_SKEYS_MAX)
		return -EINVAL;

	keys = kmalloc_array(args->count, sizeof(uint8_t),
			     GFP_KERNEL | __GFP_NOWARN);
	if (!keys)
		keys = vmalloc(sizeof(uint8_t) * args->count);
	if (!keys)
		return -ENOMEM;

	down_read(&current->mm->mmap_sem);
	for (i = 0; i < args->count; i++) {
		hva = gfn_to_hva(kvm, args->start_gfn + i);
		if (kvm_is_error_hva(hva)) {
			r = -EFAULT;
			break;
		}

		r = get_guest_storage_key(current->mm, hva, &keys[i]);
		if (r)
			break;
	}
	up_read(&current->mm->mmap_sem);

	if (!r) {
		r = copy_to_user((uint8_t __user *)args->skeydata_addr, keys,
				 sizeof(uint8_t) * args->count);
		if (r)
			r = -EFAULT;
	}

	kvfree(keys);
	return r;
}

Contributors
Person Tokens Prop Commits CommitProp
Jason J. Herne 189 73.54% 1 16.67%
Martin Schwidefsky 25 9.73% 1 16.67%
Heiko Carstens 15 5.84% 1 16.67%
Carsten Otte 10 3.89% 1 16.67%
Cornelia Huck 10 3.89% 1 16.67%
David Hildenbrand 8 3.11% 1 16.67%
Total 257 100.00% 6 100.00%



static long kvm_s390_set_skeys(struct kvm *kvm, struct kvm_s390_skeys *args)
{
	uint8_t *keys;
	uint64_t hva;
	int i, r = 0;

	if (args->flags != 0)
		return -EINVAL;

	/* Enforce sane limit on memory allocation */
	if (args->count < 1 || args->count > KVM_S390_SKEYS_MAX)
		return -EINVAL;

	keys = kmalloc_array(args->count, sizeof(uint8_t),
			     GFP_KERNEL | __GFP_NOWARN);
	if (!keys)
		keys = vmalloc(sizeof(uint8_t) * args->count);
	if (!keys)
		return -ENOMEM;

	r = copy_from_user(keys, (uint8_t __user *)args->skeydata_addr,
			   sizeof(uint8_t) * args->count);
	if (r) {
		r = -EFAULT;
		goto out;
	}

	/* Enable storage key handling for the guest */
	r = s390_enable_skey();
	if (r)
		goto out;

	down_read(&current->mm->mmap_sem);
	for (i = 0; i < args->count; i++) {
		hva = gfn_to_hva(kvm, args->start_gfn + i);
		if (kvm_is_error_hva(hva)) {
			r = -EFAULT;
			break;
		}

		/* Lowest order bit is reserved */
		if (keys[i] & 0x01) {
			r = -EINVAL;
			break;
		}

		r = set_guest_storage_key(current->mm, hva, keys[i], 0);
		if (r)
			break;
	}
	up_read(&current->mm->mmap_sem);
out:
	kvfree(keys);
	return r;
}

Contributors
Person Tokens Prop Commits CommitProp
Jason J. Herne 243 88.36% 1 33.33%
Martin Schwidefsky 23 8.36% 1 33.33%
Dominik Dingel 9 3.27% 1 33.33%
Total 275 100.00% 3 100.00%



long kvm_arch_vm_ioctl(struct file *filp,
		       unsigned int ioctl, unsigned long arg)
{
	struct kvm *kvm = filp->private_data;
	void __user *argp = (void __user *)arg;
	struct kvm_device_attr attr;
	int r;

	switch (ioctl) {
	case KVM_S390_INTERRUPT: {
		struct kvm_s390_interrupt s390int;

		r = -EFAULT;
		if (copy_from_user(&s390int, argp, sizeof(s390int)))
			break;
		r = kvm_s390_inject_vm(kvm, &s390int);
		break;
	}
	case KVM_ENABLE_CAP: {
		struct kvm_enable_cap cap;
		r = -EFAULT;
		if (copy_from_user(&cap, argp, sizeof(cap)))
			break;
		r = kvm_vm_ioctl_enable_cap(kvm, &cap);
		break;
	}
	case KVM_CREATE_IRQCHIP: {
		struct kvm_irq_routing_entry routing;

		r = -EINVAL;
		if (kvm->arch.use_irqchip) {
			/* Set up dummy routing. */
			memset(&routing, 0, sizeof(routing));
			r = kvm_set_irq_routing(kvm, &routing, 0, 0);
		}
		break;
	}
	case KVM_SET_DEVICE_ATTR: {
		r = -EFAULT;
		if (copy_from_user(&attr, (void __user *)arg, sizeof(attr)))
			break;
		r = kvm_s390_vm_set_attr(kvm, &attr);
		break;
	}
	case KVM_GET_DEVICE_ATTR: {
		r = -EFAULT;
		if (copy_from_user(&attr, (void __user *)arg, sizeof(attr)))
			break;
		r = kvm_s390_vm_get_attr(kvm, &attr);
		break;
	}
	case KVM_HAS_DEVICE_ATTR: {
		r = -EFAULT;
		if (copy_from_user(&attr, (void __user *)arg, sizeof(attr)))
			break;
		r = kvm_s390_vm_has_attr(kvm, &attr);
		break;
	}
	case KVM_S390_GET_SKEYS: {
		struct kvm_s390_skeys args;

		r = -EFAULT;
		if (copy_from_user(&args, argp,
				   sizeof(struct kvm_s390_skeys)))
			break;
		r = kvm_s390_get_skeys(kvm, &args);
		break;
	}
	case KVM_S390_SET_SKEYS: {
		struct kvm_s390_skeys args;

		r = -EFAULT;
		if (copy_from_user(&args, argp,
				   sizeof(struct kvm_s390_skeys)))
			break;
		r = kvm_s390_set_skeys(kvm, &args);
		break;
	}
	default:
		r = -ENOTTY;
	}

	return r;
}

Contributors
Person Tokens Prop Commits CommitProp
Dominik Dingel 130 32.02% 1 12.50%
Cornelia Huck 92 22.66% 2 25.00%
Jason J. Herne 84 20.69% 1 12.50%
Heiko Carstens 56 13.79% 1 12.50%
Carsten Otte 41 10.10% 1 12.50%
Nicholas Krause 2 0.49% 1 12.50%
Avi Kivity 1 0.25% 1 12.50%
Total 406 100.00% 8 100.00%



static int kvm_s390_query_ap_config(u8 *config)
{
	u32 fcn_code = 0x04000000UL;
	u32 cc = 0;

	memset(config, 0, 128);
	asm volatile(
                "lgr 0,%1\n"
                "lgr 2,%2\n"
                ".long 0xb2af0000\n"		/* PQAP(QCI) */
		"0: ipm %0\n"
                "srl %0,28\n"
                "1:\n"
                EX_TABLE(0b, 1b)
                : "+r" (cc)
                : "r" (fcn_code), "r" (config)
                : "cc", "0", "2", "memory"
        );

	return cc;
}

Contributors
Person Tokens Prop Commits CommitProp
Tony Krowiak 25 67.57% 1 50.00%
Christian Bornträger 12 32.43% 1 50.00%
Total 37 100.00% 2 100.00%



static int kvm_s390_apxa_installed(void)
{
	u8 config[128];
	int cc;

	if (test_facility(12)) {
		cc = kvm_s390_query_ap_config(config);

		if (cc)
			pr_err("PQAP(QCI) failed with cc=%d", cc);
		else
			return config[0] & 0x40;
	}

	return 0;
}

Contributors
Person Tokens Prop Commits CommitProp
Tony Krowiak 56 100.00% 1 100.00%
Total 56 100.00% 1 100.00%



static void kvm_s390_set_crycb_format(struct kvm *kvm)
{
	kvm->arch.crypto.crycbd = (__u32)(unsigned long) kvm->arch.crypto.crycb;

	if (kvm_s390_apxa_installed())
		kvm->arch.crypto.crycbd |= CRYCB_FORMAT2;
	else
		kvm->arch.crypto.crycbd |= CRYCB_FORMAT1;
}

Contributors
Person Tokens Prop Commits CommitProp
Tony Krowiak 60 100.00% 1 100.00%
Total 60 100.00% 1 100.00%



static u64 kvm_s390_get_initial_cpuid(void)
{
	struct cpuid cpuid;

	get_cpu_id(&cpuid);
	cpuid.version = 0xff;
	return *((u64 *) &cpuid);
}

Contributors
Person Tokens Prop Commits CommitProp
David Hildenbrand 22 62.86% 1 50.00%
Michael Müller 13 37.14% 1 50.00%
Total 35 100.00% 2 100.00%



static void kvm_s390_crypto_init(struct kvm *kvm)
{
	if (!test_kvm_facility(kvm, 76))
		return;

	kvm->arch.crypto.crycb = &kvm->arch.sie_page2->crycb;
	kvm_s390_set_crycb_format(kvm);

	/* Enable AES/DEA protected key functions by default */
	kvm->arch.crypto.aes_kw = 1;
	kvm->arch.crypto.dea_kw = 1;
	get_random_bytes(kvm->arch.crypto.crycb->aes_wrapping_key_mask,
			 sizeof(kvm->arch.crypto.crycb->aes_wrapping_key_mask));
	get_random_bytes(kvm->arch.crypto.crycb->dea_wrapping_key_mask,
			 sizeof(kvm->arch.crypto.crycb->dea_wrapping_key_mask));
}

Contributors
Person Tokens Prop Commits CommitProp
Tony Krowiak 109 93.16% 4 66.67%
David Hildenbrand 5 4.27% 1 16.67%
Michael Müller 3 2.56% 1 16.67%
Total 117 100.00% 6 100.00%



static void sca_dispose(struct kvm *kvm)
{
	if (kvm->arch.use_esca)
		free_pages_exact(kvm->arch.sca, sizeof(struct esca_block));
	else
		free_page((unsigned long)(kvm->arch.sca));
	kvm->arch.sca = NULL;
}

Contributors
Person Tokens Prop Commits CommitProp
Eugene (jno) Dvurechenski 58 100.00% 2 100.00%
Total 58 100.00% 2 100.00%



int kvm_arch_init_vm(struct kvm *kvm, unsigned long type)
{
	gfp_t alloc_flags = GFP_KERNEL;
	int i, rc;
	char debug_name[16];
	static unsigned long sca_offset;

	rc = -EINVAL;
#ifdef CONFIG_KVM_S390_UCONTROL
	if (type & ~KVM_VM_S390_UCONTROL)
		goto out_err;
	if ((type & KVM_VM_S390_UCONTROL) && (!capable(CAP_SYS_ADMIN)))
		goto out_err;
#else
	if (type)
		goto out_err;
#endif

	rc = s390_enable_sie();
	if (rc)
		goto out_err;

	rc = -ENOMEM;

	ratelimit_state_init(&kvm->arch.sthyi_limit, 5 * HZ, 500);

	kvm->arch.use_esca = 0; /* start with basic SCA */
	if (!sclp.has_64bscao)
		alloc_flags |= GFP_DMA;
	rwlock_init(&kvm->arch.sca_lock);
	kvm->arch.sca = (struct bsca_block *) get_zeroed_page(alloc_flags);
	if (!kvm->arch.sca)
		goto out_err;
	spin_lock(&kvm_lock);
	sca_offset += 16;
	if (sca_offset + sizeof(struct bsca_block) > PAGE_SIZE)
		sca_offset = 0;
	kvm->arch.sca = (struct bsca_block *)
			((char *) kvm->arch.sca + sca_offset);
	spin_unlock(&kvm_lock);

	sprintf(debug_name, "kvm-%u", current->pid);

	kvm->arch.dbf = debug_register(debug_name, 32, 1, 7 * sizeof(long));
	if (!kvm->arch.dbf)
		goto out_err;

	kvm->arch.sie_page2 =
	     (struct sie_page2 *) get_zeroed_page(GFP_KERNEL | GFP_DMA);
	if (!kvm->arch.sie_page2)
		goto out_err;

	/* Populate the facility mask initially. */
	memcpy(kvm->arch.model.fac_mask, S390_lowcore.stfle_fac_list,
	       sizeof(S390_lowcore.stfle_fac_list));
	for (i = 0; i < S390_ARCH_FAC_LIST_SIZE_U64; i++) {
		if (i < kvm_s390_fac_list_mask_size())
			kvm->arch.model.fac_mask[i] &= kvm_s390_fac_list_mask[i];
		else
			kvm->arch.model.fac_mask[i] = 0UL;
	}

	/* Populate the facility list initially. */
	kvm->arch.model.fac_list = kvm->arch.sie_page2->fac_list;
	memcpy(kvm->arch.model.fac_list, kvm->arch.model.fac_mask,
	       S390_ARCH_FAC_LIST_SIZE_BYTE);

	set_kvm_facility(kvm->arch.model.fac_mask, 74);
	set_kvm_facility(kvm->arch.model.fac_list, 74);

	kvm->arch.model.cpuid = kvm_s390_get_initial_cpuid();
	kvm->arch.model.ibc = sclp.ibc & 0x0fff;

	kvm_s390_crypto_init(kvm);

	spin_lock_init(&kvm->arch.float_int.lock);
	for (i = 0; i < FIRQ_LIST_COUNT; i++)
		INIT_LIST_HEAD(&kvm->arch.float_int.lists[i]);
	init_waitqueue_head(&kvm->arch.ipte_wq);
	mutex_init(&kvm->arch.ipte_mutex);

	debug_register_view(kvm->arch.dbf, &debug_sprintf_view);
	VM_EVENT(kvm, 3, "vm created with type %lu", type);

	if (type & KVM_VM_S390_UCONTROL) {
		kvm->arch.gmap = NULL;
		kvm->arch.mem_limit = KVM_S390_NO_MEM_LIMIT;
	} else {
		if (sclp.hamax == U64_MAX)
			kvm->arch.mem_limit = TASK_MAX_SIZE;
		else
			kvm->arch.mem_limit = min_t(unsigned long, TASK_MAX_SIZE,
						    sclp.hamax + 1);
		kvm->arch.gmap = gmap_create(current->mm, kvm->arch.mem_limit - 1);
		if (!kvm->arch.gmap)
			goto out_err;
		kvm->arch.gmap->private = kvm;
		kvm->arch.gmap->pfault_enabled = 0;
	}

	kvm->arch.css_support = 0;
	kvm->arch.use_irqchip = 0;
	kvm->arch.epoch = 0;

	spin_lock_init(&kvm->arch.start_stop_lock);
	kvm_s390_vsie_init(kvm);
	KVM_EVENT(3, "vm 0x%pK created by pid %u", kvm, current->pid);

	return 0;
out_err:
	free_page((unsigned long)kvm->arch.sie_page2);
	debug_unregister(kvm->arch.dbf);
	sca_dispose(kvm);
	KVM_EVENT(3, "creation of vm failed: %d", rc);
	return rc;
}

Contributors
Person Tokens Prop Commits CommitProp
Michael Müller 144 18.77% 4 9.52%
Heiko Carstens 132 17.21% 2 4.76%
Carsten Otte 132 17.21% 4 9.52%
Christian Bornträger 90 11.73% 7 16.67%
David Hildenbrand 80 10.43% 7 16.67%
Janosch Frank 42 5.48% 2 4.76%
Dominik Dingel 35 4.56% 3 7.14%
Guenther Hutzl 25 3.26% 1 2.38%
Eugene (jno) Dvurechenski 23 3.00% 3 7.14%
Jens Freimann 17 2.22% 1 2.38%
Cornelia Huck 16 2.09% 2 4.76%
Thomas Huth 10 1.30% 1 2.38%
Jason J. Herne 8 1.04% 1 2.38%
Jan Kiszka 7 0.91% 1 2.38%
Tony Krowiak 4 0.52% 1 2.38%
Martin Schwidefsky 2 0.26% 2 4.76%
Total 767 100.00% 42 100.00%



bool kvm_arch_has_vcpu_debugfs(void)
{
	return false;
}

Contributors
Person Tokens Prop Commits CommitProp
Luiz Fernando N. Capitulino 10 100.00% 1 100.00%
Total 10 100.00% 1 100.00%



int kvm_arch_create_vcpu_debugfs(struct kvm_vcpu *vcpu)
{
	return 0;
}

Contributors
Person Tokens Prop Commits CommitProp
Luiz Fernando N. Capitulino 13 100.00% 1 100.00%
Total 13 100.00% 1 100.00%



void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu)
{
	VCPU_EVENT(vcpu, 3, "%s", "free cpu");
	trace_kvm_s390_destroy_vcpu(vcpu->vcpu_id);
	kvm_s390_clear_local_irqs(vcpu);
	kvm_clear_async_pf_completion_queue(vcpu);
	if (!kvm_is_ucontrol(vcpu->kvm))
		sca_del_vcpu(vcpu);

	if (kvm_is_ucontrol(vcpu->kvm))
		gmap_remove(vcpu->arch.gmap);

	if (vcpu->kvm->arch.use_cmma)
		kvm_s390_vcpu_unsetup_cmma(vcpu);
	free_page((unsigned long)(vcpu->arch.sie_block));

	kvm_vcpu_uninit(vcpu);
	kmem_cache_free(kvm_vcpu_cache, vcpu);
}

Contributors
Person Tokens Prop Commits CommitProp
Christian Bornträger 54 47.79% 4 28.57%
Carsten Otte 27 23.89% 2 14.29%
Dominik Dingel 11 9.73% 3 21.43%
Konstantin Weitz 9 7.96% 1 7.14%
Cornelia Huck 7 6.19% 1 7.14%
Michael Müller 3 2.65% 1 7.14%
Martin Schwidefsky 1 0.88% 1 7.14%
Eugene (jno) Dvurechenski 1 0.88% 1 7.14%
Total 113 100.00% 14 100.00%



static void kvm_free_vcpus(struct kvm *kvm)
{
	unsigned int i;
	struct kvm_vcpu *vcpu;

	kvm_for_each_vcpu(i, vcpu, kvm)
		kvm_arch_vcpu_destroy(vcpu);

	mutex_lock(&kvm->lock);
	for (i = 0; i < atomic_read(&kvm->online_vcpus); i++)
		kvm->vcpus[i] = NULL;

	atomic_set(&kvm->online_vcpus, 0);
	mutex_unlock(&kvm->lock);
}

Contributors
Person Tokens Prop Commits CommitProp
Gleb Natapov 47 54.02% 1 50.00%
Christian Bornträger 40 45.98% 1 50.00%
Total 87 100.00% 2 100.00%



void kvm_arch_destroy_vm(struct kvm *kvm)
{
	kvm_free_vcpus(kvm);
	sca_dispose(kvm);
	debug_unregister(kvm->arch.dbf);
	free_page((unsigned long)kvm->arch.sie_page2);
	if (!kvm_is_ucontrol(kvm))
		gmap_remove(kvm->arch.gmap);
	kvm_s390_destroy_adapters(kvm);
	kvm_s390_clear_float_irqs(kvm);
	kvm_s390_vsie_destroy(kvm);
	KVM_EVENT(3, "vm 0x%pK destroyed", kvm);
}

Contributors
Person Tokens Prop Commits CommitProp
Heiko Carstens 22 26.51% 1 7.69%
Christian Bornträger 20 24.10% 4 30.77%
Carsten Otte 16 19.28% 2 15.38%
David Hildenbrand 11 13.25% 2 15.38%
Tony Krowiak 7 8.43% 1 7.69%
Cornelia Huck 5 6.02% 1 7.69%
Eugene (jno) Dvurechenski 1 1.20% 1 7.69%
Martin Schwidefsky 1 1.20% 1 7.69%
Total 83 100.00% 13 100.00%

/* Section: vcpu related */


static int __kvm_ucontrol_vcpu_init(struct kvm_vcpu *vcpu)
{
	vcpu->arch.gmap = gmap_create(current->mm, -1UL);
	if (!vcpu->arch.gmap)
		return -ENOMEM;
	vcpu->arch.gmap->private = vcpu->kvm;

	return 0;
}

Contributors
Person Tokens Prop Commits CommitProp
Carsten Otte 25 45.45% 1 14.29%
Christian Bornträger 12 21.82% 1 14.29%
Heiko Carstens 8 14.55% 1 14.29%
Dominik Dingel 6 10.91% 2 28.57%
Martin Schwidefsky 4 7.27% 2 28.57%
Total 55 100.00% 7 100.00%



static void sca_del_vcpu(struct kvm_vcpu *vcpu)
{
	if (!kvm_s390_use_sca_entries())
		return;
	read_lock(&vcpu->kvm->arch.sca_lock);
	if (vcpu->kvm->arch.use_esca) {
		struct esca_block *sca = vcpu->kvm->arch.sca;

		clear_bit_inv(vcpu->vcpu_id, (unsigned long *) sca->mcn);
		sca->cpu[vcpu->vcpu_id].sda = 0;
	} else {
		struct bsca_block *sca = vcpu->kvm->arch.sca;

		clear_bit_inv(vcpu->vcpu_id, (unsigned long *) &sca->mcn);
		sca->cpu[vcpu->vcpu_id].sda = 0;
	}
	read_unlock(&vcpu->kvm->arch.sca_lock);
}

Contributors
Person Tokens Prop Commits CommitProp
Eugene (jno) Dvurechenski 135 95.07% 4 80.00%
David Hildenbrand 7 4.93% 1 20.00%
Total 142 100.00% 5 100.00%



static void sca_add_vcpu(struct kvm_vcpu *vcpu)
{
	if (!kvm_s390_use_sca_entries()) {
		struct bsca_block *sca = vcpu->kvm->arch.sca;

		/* we still need the basic sca for the ipte control */
		vcpu->arch.sie_block->scaoh = (__u32)(((__u64)sca) >> 32);
		vcpu->arch.sie_block->scaol = (__u32)(__u64)sca;
	}
	read_lock(&vcpu->kvm->arch.sca_lock);
	if (vcpu->kvm->arch.use_esca) {
		struct esca_block *sca = vcpu->kvm->arch.sca;

		sca->cpu[vcpu->vcpu_id].sda = (__u64) vcpu->arch.sie_block;
		vcpu->arch.sie_block->scaoh = (__u32)(((__u64)sca) >> 32);
		vcpu->arch.sie_block->scaol = (__u32)(__u64)sca & ~0x3fU;
		vcpu->arch.sie_block->ecb2 |= 0x04U;
		set_bit_inv(vcpu->vcpu_id, (unsigned long *) sca->mcn);
	} else {
		struct bsca_block *sca = vcpu->kvm->arch.sca;

		sca->cpu[vcpu->vcpu_id].sda = (__u64) vcpu->arch.sie_block;
		vcpu->arch.sie_block->scaoh = (__u32)(((__u64)sca) >> 32);
		vcpu->arch.sie_block->scaol = (__u32)(__u64)sca;
		set_bit_inv(vcpu->vcpu_id, (unsigned long *) &sca->mcn);
	}
	read_unlock(&vcpu->kvm->arch.sca_lock);
}

Contributors
Person Tokens Prop Commits CommitProp
Eugene (jno) Dvurechenski 206 69.13% 4 57.14%
David Hildenbrand 92 30.87% 3 42.86%
Total 298 100.00% 7 100.00%

/* Basic SCA to Extended SCA data copy routines */


static inline void sca_copy_entry(struct esca_entry *d, struct bsca_entry *s)
{
	d->sda = s->sda;
	d->sigp_ctrl.c = s->sigp_ctrl.c;
	d->sigp_ctrl.scn = s->sigp_ctrl.scn;
}

Contributors
Person Tokens Prop Commits CommitProp
Eugene (jno) Dvurechenski 49 100.00% 1 100.00%
Total 49 100.00% 1 100.00%



static void sca_copy_b_to_e(struct esca_block *d, struct bsca_block *s)
{
	int i;

	d->ipte_control = s->ipte_control;
	d->mcn[0] = s->mcn;
	for (i = 0; i < KVM_S390_BSCA_CPU_SLOTS; i++)
		sca_copy_entry(&d->cpu[i], &s->cpu[i]);
}

Contributors
Person Tokens Prop Commits CommitProp
Eugene (jno) Dvurechenski 70 100.00% 1 100.00%
Total 70 100.00% 1 100.00%



static int sca_switch_to_extended(struct kvm *kvm)
{
	struct bsca_block *old_sca = kvm->arch.sca;
	struct esca_block *new_sca;
	struct kvm_vcpu *vcpu;
	unsigned int vcpu_idx;
	u32 scaol, scaoh;

	new_sca = alloc_pages_exact(sizeof(*new_sca), GFP_KERNEL|__GFP_ZERO);
	if (!new_sca)
		return -ENOMEM;

	scaoh = (u32)((u64)(new_sca) >> 32);
	scaol = (u32)(u64)(new_sca) & ~0x3fU;

	kvm_s390_vcpu_block_all(kvm);
	write_lock(&kvm->arch.sca_lock);

	sca_copy_b_to_e(new_sca, old_sca);

	kvm_for_each_vcpu(vcpu_idx, vcpu, kvm) {
		vcpu->arch.sie_block->scaoh = scaoh;
		vcpu->arch.sie_block->scaol = scaol;
		vcpu->arch.sie_block->ecb2 |= 0x04U;
	}
	kvm->arch.sca = new_sca;
	kvm->arch.use_esca = 1;

	write_unlock(&kvm->arch.sca_lock);
	kvm_s390_vcpu_unblock_all(kvm);

	free_page((unsigned long)old_sca);

	VM_EVENT(kvm, 2, "Switched to ESCA (0x%pK -> 0x%pK)",
		 old_sca, kvm->arch.sca);
	return 0;
}

Contributors
Person Tokens Prop Commits CommitProp
Eugene (jno) Dvurechenski 217 99.54% 2 66.67%
Christian Bornträger 1 0.46% 1 33.33%
Total 218 100.00% 3 100.00%



static int sca_can_add_vcpu(struct kvm *kvm, unsigned int id)
{
	int rc;

	if (!kvm_s390_use_sca_entries()) {
		if (id < KVM_MAX_VCPUS)
			return true;
		return false;
	}
	if (id < KVM_S390_BSCA_CPU_SLOTS)
		return true;
	if (!sclp.has_esca || !sclp.has_64bscao)
		return false;

	mutex_lock(&kvm->lock);
	rc = kvm->arch.use_esca ? 0 : sca_switch_to_extended(kvm);
	mutex_unlock(&kvm->lock);

	return rc == 0 && id < KVM_S390_ESCA_CPU_SLOTS;
}

Contributors
Person Tokens Prop Commits CommitProp
Eugene (jno) Dvurechenski 77 75.49% 2 50.00%
David Hildenbrand 25 24.51% 2 50.00%
Total 102 100.00% 4 100.00%



int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu)
{
	vcpu->arch.pfault_token = KVM_S390_PFAULT_TOKEN_INVALID;
	kvm_clear_async_pf_completion_queue(vcpu);
	vcpu->run->kvm_valid_regs = KVM_SYNC_PREFIX |
				    KVM_SYNC_GPRS |
				    KVM_SYNC_ACRS |
				    KVM_SYNC_CRS |
				    KVM_SYNC_ARCH0 |
				    KVM_SYNC_PFAULT;
	kvm_s390_set_prefix(vcpu, 0);
	if (test_kvm_facility(vcpu->kvm, 64))
		vcpu->run->kvm_valid_regs |= KVM_SYNC_RICCB;
	/* fprs can be synchronized via vrs, even if the guest has no vx. With
         * MACHINE_HAS_VX, (load|store)_fpu_regs() will work with vrs format.
         */
	if (MACHINE_HAS_VX)
		vcpu->run->kvm_valid_regs |= KVM_SYNC_VRS;
	else
		vcpu->run->kvm_valid_regs |= KVM_SYNC_FPRS;

	if (kvm_is_ucontrol(vcpu->kvm))
		return __kvm_ucontrol_vcpu_init(vcpu);

	return 0;
}

Contributors
Person Tokens Prop Commits CommitProp
Dominik Dingel 30 28.04% 1 7.69%
Eric Farman 17 15.89% 1 7.69%
David Hildenbrand 15 14.02% 3 23.08%
Christian Bornträger 14 13.08% 4 30.77%
Fan Zhang 13 12.15% 1 7.69%
Julius Niedworok 7 6.54% 1 7.69%
Carsten Otte 7 6.54% 1 7.69%
Heiko Carstens 4 3.74% 1 7.69%
Total 107 100.00% 13 100.00%

/* needs disabled preemption to protect from TOD sync and vcpu_load/put */


static void __start_cpu_timer_accounting(struct kvm_vcpu *vcpu)
{
	WARN_ON_ONCE(vcpu->arch.cputm_start != 0);
	raw_write_seqcount_begin(&vcpu->arch.cputm_seqcount);
	vcpu->arch.cputm_start = get_tod_clock_fast();
	raw_write_seqcount_end(&vcpu->arch.cputm_seqcount);
}

Contributors
Person Tokens Prop Commits CommitProp
David Hildenbrand 51 100.00% 2 100.00%
Total 51 100.00% 2 100.00%

/* needs disabled preemption to protect from TOD sync and vcpu_load/put */


static void __stop_cpu_timer_accounting(struct kvm_vcpu *vcpu)
{
	WARN_ON_ONCE(vcpu->arch.cputm_start == 0);
	raw_write_seqcount_begin(&vcpu->arch.cputm_seqcount);
	vcpu->arch.sie_block->cputm -= get_tod_clock_fast() - vcpu->arch.cputm_start;
	vcpu->arch.cputm_start = 0;
	raw_write_seqcount_end(&vcpu->arch.cputm_seqcount);
}

Contributors
Person Tokens Prop Commits CommitProp
David Hildenbrand 67 100.00% 2 100.00%
Total 67 100.00% 2 100.00%

/* needs disabled preemption to protect from TOD sync and vcpu_load/put */


static void __enable_cpu_timer_accounting(struct kvm_vcpu *vcpu)
{
	WARN_ON_ONCE(vcpu->arch.cputm_enabled);
	vcpu->arch.cputm_enabled = true;
	__start_cpu_timer_accounting(vcpu);
}

Contributors
Person Tokens Prop Commits CommitProp
David Hildenbrand 33 100.00% 1 100.00%
Total 33 100.00% 1 100.00%

/* needs disabled preemption to protect from TOD sync and vcpu_load/put */


static void __disable_cpu_timer_accounting(struct kvm_vcpu *vcpu)
{
	WARN_ON_ONCE(!vcpu->arch.cputm_enabled);
	__stop_cpu_timer_accounting(vcpu);
	vcpu->arch.cputm_enabled = false;
}

Contributors
Person Tokens Prop Commits CommitProp
David Hildenbrand 34 100.00% 1 100.00%
Total 34 100.00% 1 100.00%



static void enable_cpu_timer_accounting(struct kvm_vcpu *vcpu)
{
	preempt_disable(); /* protect from TOD sync and vcpu_load/put */
	__enable_cpu_timer_accounting(vcpu);
	preempt_enable();
}

Contributors
Person Tokens Prop Commits CommitProp
David Hildenbrand 23 100.00% 1 100.00%
Total 23 100.00% 1 100.00%



static void disable_cpu_timer_accounting(struct kvm_vcpu *vcpu)
{
	preempt_disable(); /* protect from TOD sync and vcpu_load/put */
	__disable_cpu_timer_accounting(vcpu);
	preempt_enable();
}

Contributors
Person Tokens Prop Commits CommitProp
David Hildenbrand 23 100.00% 1 100.00%
Total 23 100.00% 1 100.00%

/* set the cpu timer - may only be called from the VCPU thread itself */


void kvm_s390_set_cpu_timer(struct kvm_vcpu *vcpu, __u64 cputm)
{
	preempt_disable(); /* protect from TOD sync and vcpu_load/put */
	raw_write_seqcount_begin(&vcpu->arch.cputm_seqcount);
	if (vcpu->arch.cputm_enabled)
		vcpu->arch.cputm_start = get_tod_clock_fast();
	vcpu->arch.sie_block->cputm = cputm;
	raw_write_seqcount_end(&vcpu->arch.cputm_seqcount);
	preempt_enable();
}

Contributors
Person Tokens Prop Commits CommitProp
David Hildenbrand 67 100.00% 3 100.00%
Total 67 100.00% 3 100.00%

/* update and get the cpu timer - can also be called from other VCPU threads */


__u64 kvm_s390_get_cpu_timer(struct kvm_vcpu *vcpu)
{
	unsigned int seq;
	__u64 value;

	if (unlikely(!vcpu->arch.cputm_enabled))
		return vcpu->arch.sie_block->cputm;

	preempt_disable(); /* protect from TOD sync and vcpu_load/put */
	do {
		seq = raw_read_seqcount(&vcpu->arch.cputm_seqcount);
		/*
                 * If the writer would ever execute a read in the critical
                 * section, e.g. in irq context, we have a deadlock.
                 */
		WARN_ON_ONCE((seq & 1) && smp_processor_id() == vcpu->cpu);
		value = vcpu->arch.sie_block->cputm;
		/* if cputm_start is 0, accounting is being started/stopped */
		if (likely(vcpu->arch.cputm_start))
			value -= get_tod_clock_fast() - vcpu->arch.cputm_start;
	} while (read_seqcount_retry(&vcpu->arch.cputm_seqcount, seq & ~1));
	preempt_enable();
	return value;
}

Contributors
Person Tokens Prop Commits CommitProp
David Hildenbrand 129 98.47% 3 75.00%
Heiko Carstens 2 1.53% 1 25.00%
Total 131 100.00% 4 100.00%



void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
{

	gmap_enable(vcpu->arch.enabled_gmap);
	atomic_or(CPUSTAT_RUNNING, &vcpu->arch.sie_block->cpuflags);
	if (vcpu->arch.cputm_enabled && !is_vcpu_idle(vcpu))
		__start_cpu_timer_accounting(vcpu);
	vcpu->cpu = cpu;
}

Contributors
Person Tokens Prop Commits CommitProp
David Hildenbrand 32 52.46% 5 55.56%
Cornelia Huck 13 21.31% 1 11.11%
Christian Bornträger 8 13.11% 1 11.11%
Heiko Carstens 7 11.48% 1 11.11%
Peter Zijlstra 1 1.64% 1 11.11%
Total 61 100.00% 9 100.00%



void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu)
{
	vcpu->cpu = -1;
	if (vcpu->arch.cputm_enabled && !is_vcpu_idle(vcpu))
		__stop_cpu_timer_accounting(vcpu);
	atomic_andnot(CPUSTAT_RUNNING, &vcpu->arch.sie_block->cpuflags);
	vcpu->arch.enabled_gmap = gmap_get_enabled();
	gmap_disable(vcpu->arch.enabled_gmap);

}

Contributors
Person Tokens Prop Commits CommitProp
David Hildenbrand 36 52.94% 4 50.00%
Cornelia Huck 13 19.12% 1 12.50%
Heiko Carstens 10 14.71% 1 12.50%
Christian Bornträger 8 11.76% 1 12.50%
Peter Zijlstra 1 1.47% 1 12.50%
Total 68 100.00% 8 100.00%



static void kvm_s390_vcpu_initial_reset(struct kvm_vcpu *vcpu)
{
	/* this equals initial cpu reset in pop, but we don't switch to ESA */
	vcpu->arch.sie_block->gpsw.mask = 0UL;
	vcpu->arch.sie_block->gpsw.addr = 0UL;
	kvm_s390_set_prefix(vcpu, 0);
	kvm_s390_set_cpu_timer(vcpu, 0);
	vcpu->arch.sie_block->ckc       = 0UL;
	vcpu->arch.sie_block->todpr     = 0;
	memset(vcpu->arch.sie_block->gcr, 0, 16 * sizeof(__u64));
	vcpu->arch.sie_block->gcr[0]  = 0xE0UL;
	vcpu->arch.sie_block->gcr[14] = 0xC2000000UL;
	/* make sure the new fpc will be lazily loaded */
	save_fpu_regs();
	current->thread.fpu.fpc = 0;
	vcpu->arch.sie_block->gbea = 1;
	vcpu->arch.sie_block->pp = 0;
	vcpu->arch.pfault_token = KVM_S390_PFAULT_TOKEN_INVALID;
	kvm_clear_async_pf_completion_queue(vcpu);
	if (!kvm_s390_user_cpu_state_ctrl(vcpu->kvm))
		kvm_s390_vcpu_stop(vcpu);
	kvm_s390_clear_local_irqs(vcpu);
}

Contributors
Person Tokens Prop Commits CommitProp
Heiko Carstens 123 67.21% 1 10.00%
David Hildenbrand 23 12.57% 4 40.00%
Christian Bornträger 19 10.38% 3 30.00%
Dominik Dingel 13 7.10% 1 10.00%
Jens Freimann 5 2.73% 1 10.00%
Total 183 100.00% 10 100.00%



void kvm_arch_vcpu_postcreate(struct kvm_vcpu *vcpu)
{
	mutex_lock(&vcpu->kvm->lock);
	preempt_disable();
	vcpu->arch.sie_block->epoch = vcpu->kvm->arch.epoch;
	preempt_enable();
	mutex_unlock(&vcpu->kvm->lock);
	if (!kvm_is_ucontrol(vcpu->kvm)) {
		vcpu->arch.gmap = vcpu->kvm->arch.gmap;
		sca_add_vcpu(vcpu);
	}
	if (test_kvm_facility(vcpu->kvm, 74) || vcpu->kvm->arch.user_instr0)
		vcpu->arch.sie_block->ictl |= ICTL_OPEREXC;
	/* make vcpu_load load the right gmap on the first trigger */
	vcpu->arch.enabled_gmap = vcpu->arch.gmap;
}

Contributors
Person Tokens Prop Commits CommitProp
David Hildenbrand 49 39.20% 3 37.50%
Jason J. Herne 36 28.80% 1 12.50%
Dominik Dingel 27 21.60% 2 25.00%
Marcelo Tosatti 7 5.60% 1 12.50%
Fan Zhang 6 4.80% 1 12.50%
Total 125 100.00% 8 100.00%



static void kvm_s390_vcpu_crypto_setup(struct kvm_vcpu *vcpu)
{
	if (!test_kvm_facility(vcpu->kvm, 76))
		return;

	vcpu->arch.sie_block->ecb3 &= ~(ECB3_AES | ECB3_DEA);

	if (vcpu->kvm->arch.crypto.aes_kw)
		vcpu->arch.sie_block->ecb3 |= ECB3_AES;
	if (vcpu->kvm->arch.crypto.dea_kw)
		vcpu->arch.sie_block->ecb3 |= ECB3_DEA;

	vcpu->arch.sie_block->crycbd = vcpu->kvm->arch.crypto.crycbd;
}

Contributors
Person Tokens Prop Commits CommitProp
Tony Krowiak 96 95.05% 2 66.67%
Michael Müller 5 4.95% 1 33.33%
Total 101 100.00% 3 100.00%



void kvm_s390_vcpu_unsetup_cmma(struct kvm_vcpu *vcpu)
{
	free_page(vcpu->arch.sie_block->cbrlo);
	vcpu->arch.sie_block->cbrlo = 0;
}

Contributors
Person Tokens Prop Commits CommitProp
Dominik Dingel 31 100.00% 1 100.00%
Total 31 100.00% 1 100.00%



int kvm_s390_vcpu_setup_cmma(struct kvm_vcpu *vcpu)
{
	vcpu->arch.sie_block->cbrlo = get_zeroed_page(GFP_KERNEL);
	if (!vcpu->arch.sie_block->cbrlo)
		return -ENOMEM;

	vcpu->arch.sie_block->ecb2 |= 0x80;
	vcpu->arch.sie_block->ecb2 &= ~0x08;
	return 0;
}

Contributors
Person Tokens Prop Commits CommitProp
Dominik Dingel 43 69.35% 1 20.00%
Heiko Carstens 8 12.90% 1 20.00%
Christian Bornträger 6 9.68% 1 20.00%
Marcelo Tosatti 4 6.45% 1 20.00%
Jens Freimann 1 1.61% 1 20.00%
Total 62 100.00% 5 100.00%



static void kvm_s390_vcpu_setup_model(struct kvm_vcpu *vcpu)
{
	struct kvm_s390_cpu_model *model = &vcpu->kvm->arch.model;

	vcpu->arch.sie_block->ibc = model->ibc;
	if (test_kvm_facility(vcpu->kvm, 7))
		vcpu->arch.sie_block->fac = (u32)(u64) model->fac_list;
}

Contributors
Person Tokens Prop Commits CommitProp
Michael Müller 52 78.79% 1 33.33%
David Hildenbrand 14 21.21% 2 66.67%
Total 66 100.00% 3 100.00%



int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu)
{
	int rc = 0;

	atomic_set(&vcpu->arch.sie_block->cpuflags, CPUSTAT_ZARCH |
						    CPUSTAT_SM |
						    CPUSTAT_STOPPED);

	if (test_kvm_facility(vcpu->kvm, 78))
		atomic_or(CPUSTAT_GED2, &vcpu->arch.sie_block->cpuflags);
	else if (test_kvm_facility(vcpu->kvm, 8))
		atomic_or(CPUSTAT_GED, &vcpu->arch.sie_block->cpuflags);

	kvm_s390_vcpu_setup_model(vcpu);

	/* pgste_set_pte has special handling for !MACHINE_HAS_ESOP */
	if (MACHINE_HAS_ESOP)
		vcpu->arch.sie_block->ecb |= 0x02;
	if (test_kvm_facility(vcpu->kvm, 9))
		vcpu->arch.sie_block->ecb |= 0x04;
	if (test_kvm_facility(vcpu->kvm, 73))
		vcpu->arch.sie_block->ecb |= 0x10;

	if (test_kvm_facility(vcpu->kvm, 8) && sclp.has_pfmfi)
		vcpu->arch.sie_block->ecb2 |= 0x08;
	if (test_kvm_facility(vcpu->kvm, 130))
		vcpu->arch.sie_block->ecb2 |= 0x20;
	vcpu->arch.sie_block->eca = 0x1002000U;
	if (sclp.has_cei)
		vcpu->arch.sie_block->eca |= 0x80000000U;
	if (sclp.has_ib)
		vcpu->arch.sie_block->eca |= 0x40000000U;
	if (sclp.has_siif)
		vcpu->arch.sie_block->eca |= 1;
	if (sclp.has_sigpif)
		vcpu->arch.sie_block->eca |= 0x10000000U;
	if (test_kvm_facility(vcpu->kvm, 129)) {
		vcpu->arch.sie_block->eca |= 0x00020000;
		vcpu->arch.sie_block->ecd |= 0x20000000;
	}
	vcpu->arch.sie_block->riccbd = (unsigned long) &vcpu->run->s.regs.riccb;
	vcpu->arch.sie_block->ictl |= ICTL_ISKE | ICTL_SSKE | ICTL_RRBE;

	if (vcpu->kvm->arch.use_cmma) {
		rc = kvm_s390_vcpu_setup_cmma(vcpu);
		if (rc)
			return rc;
	}
	hrtimer_init(&vcpu->arch.ckc_timer, CLOCK_MONOTONIC, HRTIMER_MODE_REL);
	vcpu->arch.ckc_timer.function = kvm_s390_idle_wakeup;

	kvm_s390_vcpu_crypto_setup(vcpu);

	return rc;
}

Contributors
Person Tokens Prop Commits CommitProp
David Hildenbrand 99 25.13% 9 28.12%
Heiko Carstens 56 14.21% 2 6.25%
Guenther Hutzl 48 12.18% 2 6.25%
Michael Müller 31 7.87% 4 12.50%
Christian Bornträger 29 7.36% 3 9.38%
Eric Farman 28 7.11% 1 3.12%
Fan Zhang 23 5.84% 1 3.12%
Dominik Dingel 23 5.84% 3 9.38%
Janosch Frank 21 5.33% 1 3.12%
Konstantin Weitz 17 4.31% 1 3.12%
Carsten Otte 10 2.54% 2 6.25%
Tony Krowiak 5 1.27% 1 3.12%
Peter Zijlstra 2 0.51% 1 3.12%
Cornelia Huck 2 0.51% 1 3.12%
Total 394 100.00% 32 100.00%



struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm,
				      unsigned int id)
{
	struct kvm_vcpu *vcpu;
	struct sie_page *sie_page;
	int rc = -EINVAL;

	if (!kvm_is_ucontrol(kvm) && !sca_can_add_vcpu(kvm, id))
		goto out;

	rc = -ENOMEM;

	vcpu = kmem_cache_zalloc(kvm_vcpu_cache, GFP_KERNEL);
	if (!vcpu)
		goto out;

	sie_page = (struct sie_page *) get_zeroed_page(GFP_KERNEL);
	if (!sie_page)
		goto out_free_cpu;

	vcpu->arch.sie_block = &sie_page->sie_block;
	vcpu->arch.sie_block->itdba = (unsigned long) &sie_page->itdb;

	/* the real guest size will always be smaller than msl */
	vcpu->arch.sie_block->mso = 0;
	vcpu->arch.sie_block->msl = sclp.hamax;

	vcpu->arch.sie_block->icpua = id;
	spin_lock_init(&vcpu->arch.local_int.lock);
	vcpu->arch.local_int.float_int = &kvm->arch.float_int;
	vcpu->arch.local_int.wq = &vcpu->wq;
	vcpu->arch.local_int.cpuflags = &vcpu->arch.sie_block->cpuflags;
	seqcount_init(&vcpu->arch.cputm_seqcount);

	rc = kvm_vcpu_init(vcpu, kvm, id);
	if (rc)
		goto out_free_sie_block;
	VM_EVENT(kvm, 3, "create cpu %d at 0x%pK, sie block at 0x%pK", id, vcpu,
		 vcpu->arch.sie_block);
	trace_kvm_s390_create_vcpu(id, vcpu, vcpu->arch.sie_block);

	return vcpu;
out_free_sie_block:
	free_page((unsigned long)(vcpu->arch.sie_block));
out_free_cpu:
	kmem_cache_free(kvm_vcpu_cache, vcpu);
out:
	return ERR_PTR(rc);
}

Contributors
Person Tokens Prop Commits CommitProp
Heiko Carstens 111 36.04% 1 6.67%
Carsten Otte 58 18.83% 2 13.33%
Michael Müller 40 12.99% 2 13.33%
David Hildenbrand 40 12.99% 4 26.67%
Christian Bornträger 23 7.47% 3 20.00%
Wei Yongjun 17 5.52% 1 6.67%
Cornelia Huck 13 4.22% 1 6.67%
Eugene (jno) Dvurechenski 6 1.95% 1 6.67%
Total 308 100.00% 15 100.00%



int kvm_arch_vcpu_runnable(struct kvm_vcpu *vcpu)
{
	return kvm_s390_vcpu_has_irq(vcpu, 0);
}

Contributors
Person Tokens Prop Commits CommitProp
Heiko Carstens 8 44.44% 1 25.00%
Christoffer Dall 4 22.22% 1 25.00%
David Hildenbrand 3 16.67% 1 25.00%
Michael Müller 3 16.67% 1 25.00%
Total 18 100.00% 4 100.00%



void kvm_s390_vcpu_block(struct kvm_vcpu *vcpu)
{
	atomic_or(PROG_BLOCK_SIE, &vcpu->arch.sie_block->prog20);
	exit_sie(vcpu);
}

Contributors
Person Tokens Prop Commits CommitProp
Christian Bornträger 23 79.31% 2 50.00%
David Hildenbrand 5 17.24% 1 25.00%
Peter Zijlstra 1 3.45% 1 25.00%
Total 29 100.00% 4 100.00%



void kvm_s390_vcpu_unblock(struct kvm_vcpu *vcpu)
{
	atomic_andnot(PROG_BLOCK_SIE, &vcpu->arch.sie_block->prog20);
}

Contributors
Person Tokens Prop Commits CommitProp
Christian Bornträger 21 87.50% 2 50.00%
Heiko Carstens 2 8.33% 1 25.00%
Peter Zijlstra 1 4.17% 1 25.00%
Total 24 100.00% 4 100.00%



static void kvm_s390_vcpu_request(struct kvm_vcpu *vcpu)
{
	atomic_or(PROG_REQUEST, &vcpu->arch.sie_block->prog20);
	exit_sie(vcpu);
}

Contributors
Person Tokens Prop Commits CommitProp
Christian Bornträger 24 80.00% 1 33.33%
David Hildenbrand 5 16.67% 1 33.33%
Peter Zijlstra 1 3.33% 1 33.33%
Total 30 100.00% 3 100.00%



static void kvm_s390_vcpu_request_handled(struct kvm_vcpu *vcpu)
{
	atomic_andnot(PROG_REQUEST, &vcpu->arch.sie_block->prog20);
}

Contributors
Person Tokens Prop Commits CommitProp
Christian Bornträger 24 96.00% 1 50.00%
Jason J. Herne 1 4.00% 1 50.00%
Total 25 100.00% 2 100.00%

/*
 * Kick a guest cpu out of SIE and wait until SIE is not running.
 * If the CPU is not running (e.g. waiting as idle) the function will
 * return immediately. */


void exit_sie(struct kvm_vcpu *vcpu)
{
	atomic_or(CPUSTAT_STOP_INT, &vcpu->arch.sie_block->cpuflags);
	while (vcpu->arch.sie_block->prog0c & PROG_IN_SIE)
		cpu_relax();
}

Contributors
Person Tokens Prop Commits CommitProp
Christian Bornträger 23 58.97% 1 25.00%
Heiko Carstens 9 23.08% 1 25.00%
Cornelia Huck 6 15.38% 1 25.00%
Peter Zijlstra 1 2.56% 1 25.00%
Total 39 100.00% 4 100.00%

/* Kick a guest cpu out of SIE to process a request synchronously */


void kvm_s390_sync_request(int req, struct kvm_vcpu *vcpu)
{
	kvm_make_request(req, vcpu);
	kvm_s390_vcpu_request(vcpu);
}

Contributors
Person Tokens Prop Commits CommitProp
Christian Bornträger 23 92.00% 2 50.00%
Heiko Carstens 1 4.00% 1 25.00%
Wei Yongjun 1 4.00% 1 25.00%
Total 25 100.00% 4 100.00%



static void kvm_gmap_notifier(struct gmap *gmap, unsigned long start,
			      unsigned long end)
{
	struct kvm *kvm = gmap->private;
	struct kvm_vcpu *vcpu;
	unsigned long prefix;
	int i;

	if (gmap_is_shadow(gmap))
		return;
	if (start >= 1UL << 31)
		/* We are only interested in prefix pages */
		return;
	kvm_for_each_vcpu(i, vcpu, kvm) {
		/* match against both prefix pages */
		prefix = kvm_s390_get_prefix(vcpu);
		if (prefix <= end && start <= prefix + 2*PAGE_SIZE - 1) {
			VCPU_EVENT(vcpu, 2, "gmap notifier for %lx-%lx",
				   start, end);
			kvm_s390_sync_request(KVM_REQ_MMU_RELOAD, vcpu);
		}
	}
}

Contributors
Person Tokens Prop Commits CommitProp
Christian Bornträger 48 42.11% 2 25.00%
Martin Schwidefsky 44 38.60% 1 12.50%
David Hildenbrand 8 7.02% 1 12.50%
Wei Yongjun 7 6.14% 1 12.50%
Heiko Carstens 5 4.39% 1 12.50%
Michael Müller 2 1.75% 2 25.00%
Total 114 100.00% 8 100.00%



int kvm_arch_vcpu_should_kick(struct kvm_vcpu *vcpu)
{
	/* kvm common code refers to this, but never calls it */
	BUG();
	return 0;
}

Contributors
Person Tokens Prop Commits CommitProp
Heiko Carstens 12 70.59% 1 50.00%
Christoffer Dall 5 29.41% 1 50.00%
Total 17 100.00% 2 100.00%



static int kvm_arch_vcpu_ioctl_get_one_reg(struct kvm_vcpu *vcpu,
					   struct kvm_one_reg *reg)
{
	int r = -EINVAL;

	switch (reg->id) {
	case KVM_REG_S390_TODPR:
		r = put_user(vcpu->arch.sie_block->todpr,
			     (u32 __user *)reg->addr);
		break;
	case KVM_REG_S390_EPOCHDIFF:
		r = put_user(vcpu->arch.sie_block->epoch,
			     (u64 __user *)reg->addr);
		break;
	case KVM_REG_S390_CPU_TIMER:
		r = put_user(kvm_s390_get_cpu_timer(vcpu),
			     (u64 __user *)reg->addr);
		break;
	case KVM_REG_S390_CLOCK_COMP:
		r = put_user(vcpu->arch.sie_block->ckc,
			     (u64 __user *)reg->addr);
		break;
	case KVM_REG_S390_PFTOKEN:
		r = put_user(vcpu->arch.pfault_token,
			     (u64 __user *)reg->addr);
		break;
	case KVM_REG_S390_PFCOMPARE:
		r = put_user(vcpu->arch.pfault_compare,
			     (u64 __user *)reg->addr);
		break;
	case KVM_REG_S390_PFSELECT:
		r = put_user(vcpu->arch.pfault_select,
			     (u64 __user *)reg->addr);
		break;
	case KVM_REG_S390_PP:
		r = put_user(vcpu->arch.sie_block->pp,
			     (u64 __user *)reg->addr);
		break;
	case KVM_REG_S390_GBEA:
		r = put_user(vcpu->arch.sie_block->gbea,
			     (u64 __user *)reg->addr);
		break;
	default:
		break;
	}

	return r;
}

Contributors
Person Tokens Prop Commits CommitProp
Christian Bornträger 102 39.23% 4 40.00%
Carsten Otte 67 25.77% 2 20.00%
Dominik Dingel 52 20.00% 1 10.00%
Jason J. Herne 33 12.69% 1 10.00%
Heiko Carstens 3 1.15% 1 10.00%
David Hildenbrand 3 1.15% 1 10.00%
Total 260 100.00% 10 100.00%



static int kvm_arch_vcpu_ioctl_set_one_reg(struct kvm_vcpu *vcpu,
					   struct kvm_one_reg *reg)
{
	int r = -EINVAL;
	__u64 val;

	switch (reg->id) {
	case KVM_REG_S390_TODPR:
		r = get_user(vcpu->arch.sie_block->todpr,
			     (u32 __user *)reg->addr);
		break;
	case KVM_REG_S390_EPOCHDIFF:
		r = get_user(vcpu->arch.sie_block->epoch,
			     (u64 __user *)reg->addr);
		break;
	case KVM_REG_S390_CPU_TIMER:
		r = get_user(val, (u64 __user *)reg->addr);
		if (!r)
			kvm_s390_set_cpu_timer(vcpu, val);
		break;
	case KVM_REG_S390_CLOCK_COMP:
		r = get_user(vcpu->arch.sie_block->ckc,
			     (u64 __user *)reg->addr);
		break;
	case KVM_REG_S390_PFTOKEN:
		r = get_user(vcpu->arch.pfault_token,
			     (u64 __user *)reg->addr);
		if (vcpu->arch.pfault_token == KVM_S390_PFAULT_TOKEN_INVALID)
			kvm_clear_async_pf_completion_queue(vcpu);
		break;
	case KVM_REG_S390_PFCOMPARE:
		r = get_user(vcpu->arch.pfault_compare,
			     (u64 __user *)reg->addr);
		break;
	case KVM_REG_S390_PFSELECT:
		r = get_user(vcpu->arch.pfault_select,
			     (u64 __user *)reg->addr);
		break;
	case KVM_REG_S390_PP:
		r = get_user(vcpu->arch.sie_block->pp,
			     (u64 __user *)reg->addr);
		break;
	case KVM_REG_S390_GBEA:
		r = get_user(vcpu->arch.sie_block->gbea,
			     (u64 __user *)reg->addr);
		break;
	default:
		break;
	}

	return r;
}

Contributors
Person Tokens Prop Commits CommitProp
Carsten Otte 87 30.31% 2 25.00%
Dominik Dingel 72 25.09% 1 12.50%
Christian Bornträger 52 18.12% 2 25.00%
Jason J. Herne 45 15.68% 1 12.50%
David Hildenbrand 31 10.80% 2 25.00%
Total 287 100.00% 8 100.00%



static int kvm_arch_vcpu_ioctl_initial_reset(struct kvm_vcpu *vcpu)
{
	kvm_s390_vcpu_initial_reset(vcpu);
	return 0;
}

Contributors
Person Tokens Prop Commits CommitProp
Heiko Carstens 17 89.47% 1 50.00%
Carsten Otte 2 10.53% 1 50.00%
Total 19 100.00% 2 100.00%



int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs)
{
	memcpy(&vcpu->run->s.regs.gprs, &regs->gprs, sizeof(regs->gprs));
	return 0;
}

Contributors
Person Tokens Prop Commits CommitProp
Heiko Carstens 19 43.18% 1 25.00%
Carsten Otte 19 43.18% 2 50.00%
Christian Bornträger 6 13.64% 1 25.00%
Total 44 100.00% 4 100.00%



int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs)
{
	memcpy(&regs->gprs, &vcpu->run->s.regs.gprs, sizeof(regs->gprs));
	return 0;
}

Contributors
Person Tokens Prop Commits CommitProp
Heiko Carstens 29 65.91% 1 25.00%
Jason J. Herne 7 15.91% 1 25.00%
Christian Bornträger 5 11.36% 1 25.00%
Carsten Otte 3 6.82% 1 25.00%
Total 44 100.00% 4 100.00%



int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu,
				  struct kvm_sregs *sregs)
{
	memcpy(&vcpu->run->s.regs.acrs, &sregs->acrs, sizeof(sregs->acrs));
	memcpy(&vcpu->arch.sie_block->gcr, &sregs->crs, sizeof(sregs->crs));
	return 0;
}

Contributors
Person Tokens Prop Commits CommitProp
Heiko Carstens 49 72.06% 1 25.00%
Jason J. Herne 9 13.24% 1 25.00%
Christian Bornträger 6 8.82% 1 25.00%
Dominik Dingel 4 5.88% 1 25.00%
Total 68 100.00% 4 100.00%



int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu,
				  struct kvm_sregs *sregs)
{
	memcpy(&sregs->acrs, &vcpu->run->s.regs.acrs, sizeof(sregs->acrs));
	memcpy(&sregs->crs, &vcpu->arch.sie_block->gcr, sizeof(sregs->crs));
	return 0;
}

Contributors
Person Tokens Prop Commits CommitProp
Heiko Carstens 41 60.29% 1 20.00%
Christian Bornträger 24 35.29% 3 60.00%
Carsten Otte 3 4.41% 1 20.00%
Total 68 100.00% 5 100.00%



int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu)
{
	if (test_fp_ctl(fpu->fpc))
		return -EINVAL;
	vcpu->run->s.regs.fpc = fpu->fpc;
	if (MACHINE_HAS_VX)
		convert_fp_to_vx((__vector128 *) vcpu->run->s.regs.vrs,
				 (freg_t *) fpu->fprs);
	else
		memcpy(vcpu->run->s.regs.fprs, &fpu->fprs, sizeof(fpu->fprs));
	return 0;
}

Contributors
Person Tokens Prop Commits CommitProp
David Hildenbrand 44 44.00% 2 33.33%
Heiko Carstens 37 37.00% 1 16.67%
Martin Schwidefsky 13 13.00% 1 16.67%
Christian Bornträger 5 5.00% 1 16.67%
Carsten Otte 1 1.00% 1 16.67%
Total 100 100.00% 6 100.00%



int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu)
{
	/* make sure we have the latest values */
	save_fpu_regs();
	if (MACHINE_HAS_VX)
		convert_vx_to_fp((freg_t *) fpu->fprs,
				 (__vector128 *) vcpu->run->s.regs.vrs);
	else
		memcpy(fpu->fprs, vcpu->run->s.regs.fprs, sizeof(fpu->fprs));
	fpu->fpc = vcpu->run->s.regs.fpc;
	return 0;
}

Contributors
Person Tokens Prop Commits CommitProp
Heiko Carstens 45 50.00% 1 20.00%
David Hildenbrand 39 43.33% 2 40.00%
Christian Bornträger 6 6.67% 2 40.00%
Total 90 100.00% 5 100.00%



static int kvm_arch_vcpu_ioctl_set_initial_psw(struct kvm_vcpu *vcpu, psw_t psw)
{
	int rc = 0;

	if (!is_vcpu_stopped(vcpu))
		rc = -EBUSY;
	else {
		vcpu->run->psw_mask = psw.mask;
		vcpu->run->psw_addr = psw.addr;
	}
	return rc;
}

Contributors
Person Tokens Prop Commits CommitProp
Heiko Carstens 41 70.69% 1 20.00%
Carsten Otte 13 22.41% 1 20.00%
Christian Bornträger 2 3.45% 1 20.00%
David Hildenbrand 1 1.72% 1 20.00%
Cornelia Huck 1 1.72% 1 20.00%
Total 58 100.00% 5 100.00%



int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu,
				  struct kvm_translation *tr)
{
	return -EINVAL; /* not implemented yet */
}

Contributors
Person Tokens Prop Commits CommitProp
Heiko Carstens 20 100.00% 1 100.00%
Total 20 100.00% 1 100.00%


#define VALID_GUESTDBG_FLAGS (KVM_GUESTDBG_SINGLESTEP | \
                              KVM_GUESTDBG_USE_HW_BP | \
                              KVM_GUESTDBG_ENABLE)



int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu,
					struct kvm_guest_debug *dbg)
{
	int rc = 0;

	vcpu->guest_debug = 0;
	kvm_s390_clear_bp_data(vcpu);

	if (dbg->control & ~VALID_GUESTDBG_FLAGS)
		return -EINVAL;
	if (!sclp.has_gpere)
		return -EINVAL;

	if (dbg->control & KVM_GUESTDBG_ENABLE) {
		vcpu->guest_debug = dbg->control;
		/* enforce guest PER */
		atomic_or(CPUSTAT_P, &vcpu->arch.sie_block->cpuflags);

		if (dbg->control & KVM_GUESTDBG_USE_HW_BP)
			rc = kvm_s390_import_bp_data(vcpu, dbg);
	} else {
		atomic_andnot(CPUSTAT_P, &vcpu->arch.sie_block->cpuflags);
		vcpu->arch.guestdbg.last_bp = 0;
	}

	if (rc) {
		vcpu->guest_debug = 0;
		kvm_s390_clear_bp_data(vcpu);
		atomic_andnot(CPUSTAT_P, &vcpu->arch.sie_block->cpuflags);
	}

	return rc;
}

Contributors
Person Tokens Prop Commits CommitProp
David Hildenbrand 118 71.08% 3 37.50%
Heiko Carstens 39 23.49% 1 12.50%
Peter Zijlstra 3 1.81% 1 12.50%
Jan Kiszka 2 1.20% 1 12.50%
Christian Bornträger 2 1.20% 1 12.50%
Carsten Otte 2 1.20% 1 12.50%
Total 166 100.00% 8 100.00%



int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu,
				    struct kvm_mp_state *mp_state)
{
	/* CHECK_STOP and LOAD are not supported yet */
	return is_vcpu_stopped(vcpu) ? KVM_MP_STATE_STOPPED :
				       KVM_MP_STATE_OPERATING;
}

Contributors
Person Tokens Prop Commits CommitProp
Heiko Carstens 11 42.31% 1 33.33%
David Hildenbrand 9 34.62% 1 33.33%
Marcelo Tosatti 6 23.08% 1 33.33%
Total 26 100.00% 3 100.00%



int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu,
				    struct kvm_mp_state *mp_state)
{
	int rc = 0;

	/* user space knows about this interface - let it control the state */
	vcpu->kvm->arch.user_cpu_state_ctrl = 1;

	switch (mp_state->mp_state) {
	case KVM_MP_STATE_STOPPED:
		kvm_s390_vcpu_stop(vcpu);
		break;
	case KVM_MP_STATE_OPERATING:
		kvm_s390_vcpu_start(vcpu);
		break;
	case KVM_MP_STATE_LOAD:
	case KVM_MP_STATE_CHECK_STOP:
		/* fall through - CHECK_STOP and LOAD are not supported yet */
	default:
		rc = -ENXIO;
	}

	return rc;
}

Contributors
Person Tokens Prop Commits CommitProp
David Hildenbrand 56 76.71% 1 33.33%
Marcelo Tosatti 16 21.92% 1 33.33%
Heiko Carstens 1 1.37% 1 33.33%
Total 73 100.00% 3 100.00%



static bool ibs_enabled(struct kvm_vcpu *vcpu)
{
	return atomic_read(&vcpu->arch.sie_block->cpuflags) & CPUSTAT_IBS;
}

Contributors
Person Tokens Prop Commits CommitProp
David Hildenbrand 15 57.69% 1 50.00%
Heiko Carstens 11 42.31% 1 50.00%
Total 26 100.00% 2 100.00%



static int kvm_s390_handle_requests(struct kvm_vcpu *vcpu)
{
retry:
	kvm_s390_vcpu_request_handled(vcpu);
	if (!vcpu->requests)
		return 0;
	/*
         * We use MMU_RELOAD just to re-arm the ipte notifier for the
         * guest prefix page. gmap_mprotect_notify will wait on the ptl lock.
         * This ensures that the ipte instruction for this request has
         * already finished. We might race against a second unmapper that
         * wants to set the blocking bit. Lets just retry the request loop.
         */
	if (kvm_check_request(KVM_REQ_MMU_RELOAD, vcpu)) {
		int rc;
		rc = gmap_mprotect_notify(vcpu->arch.gmap,
					  kvm_s390_get_prefix(vcpu),
					  PAGE_SIZE * 2, PROT_WRITE);
		if (rc) {
			kvm_make_request(KVM_REQ_MMU_RELOAD, vcpu);
			return rc;
		}
		goto retry;
	}

	if (kvm_check_request(KVM_REQ_TLB_FLUSH, vcpu)) {
		vcpu->arch.sie_block->ihcpu = 0xffff;
		goto retry;
	}

	if (kvm_check_request(KVM_REQ_ENABLE_IBS, vcpu)) {
		if (!ibs_enabled(vcpu)) {
			trace_kvm_s390_enable_disable_ibs(vcpu->vcpu_id, 1);
			atomic_or(CPUSTAT_IBS,
					&vcpu->arch.sie_block->cpuflags);
		}
		goto retry;
	}

	if (kvm_check_request(KVM_REQ_DISABLE_IBS, vcpu)) {
		if (ibs_enabled(vcpu)) {
			trace_kvm_s390_enable_disable_ibs(vcpu->vcpu_id, 0);
			atomic_andnot(CPUSTAT_IBS,
					  &vcpu->arch.sie_block->cpuflags);
		}
		goto retry;
	}

	if (kvm_check_request(KVM_REQ_ICPT_OPEREXC, vcpu)) {
		vcpu->arch.sie_block->ictl |= ICTL_OPEREXC;
		goto retry;
	}

	/* nothing to do, just clear the request */
	clear_bit(KVM_REQ_UNHALT, &vcpu->requests);

	return 0;
}

Contributors
Person Tokens Prop Commits CommitProp
David Hildenbrand 128 53.56% 4 28.57%
Christian Bornträger 47 19.67% 3 21.43%
Heiko Carstens 29 12.13% 1 7.14%
Martin Schwidefsky 14 5.86% 2 14.29%
Julius Niedworok 9 3.77% 1 7.14%
Carsten Otte 7 2.93% 1 7.14%
Michael Müller 3 1.26% 1 7.14%
Peter Zijlstra 2 0.84% 1 7.14%
Total 239 100.00% 14 100.00%



void kvm_s390_set_tod_clock(struct kvm *kvm, u64 tod)
{
	struct kvm_vcpu *vcpu;
	int i;

	mutex_lock(&kvm->lock);
	preempt_disable();
	kvm->arch.epoch = tod - get_tod_clock();
	kvm_s390_vcpu_block_all(kvm);
	kvm_for_each_vcpu(i, vcpu, kvm)
		vcpu->arch.sie_block->epoch = kvm->arch.epoch;
	kvm_s390_vcpu_unblock_all(kvm);
	preempt_enable();
	mutex_unlock(&kvm->lock);
}

Contributors
Person Tokens Prop Commits CommitProp
David Hildenbrand 86 100.00% 1 100.00%
Total 86 100.00% 1 100.00%

/**
 * kvm_arch_fault_in_page - fault-in guest page if necessary
 * @vcpu: The corresponding virtual cpu
 * @gpa: Guest physical address
 * @writable: Whether the page should be writable or not
 *
 * Make sure that a guest page has been faulted-in on the host.
 *
 * Return: Zero on success, negative error code otherwise.
 */


long kvm_arch_fault_in_page(struct kvm_vcpu *vcpu, gpa_t gpa, int writable)
{
	return gmap_fault(vcpu->arch.gmap, gpa,
			  writable ? FAULT_FLAG_WRITE : 0);
}

Contributors
Person Tokens Prop Commits CommitProp
Heiko Carstens 15 44.12% 1 20.00%
Thomas Huth 9 26.47% 1 20.00%
Dominik Dingel 6 17.65% 1 20.00%
Martin Schwidefsky 4 11.76% 2 40.00%
Total 34 100.00% 5 100.00%



static void __kvm_inject_pfault_token(struct kvm_vcpu *vcpu, bool start_token,
				      unsigned long token)
{
	struct kvm_s390_interrupt inti;
	struct kvm_s390_irq irq;

	if (start_token) {
		irq.u.ext.ext_params2 = token;
		irq.type = KVM_S390_INT_PFAULT_INIT;
		WARN_ON_ONCE(kvm_s390_inject_vcpu(vcpu, &irq));
	} else {
		inti.type = KVM_S390_INT_PFAULT_DONE;
		inti.parm64 = token;
		WARN_ON_ONCE(kvm_s390_inject_vm(vcpu->kvm, &inti));
	}
}

Contributors
Person Tokens Prop Commits CommitProp
Dominik Dingel 40 45.98% 1 25.00%
Jens Freimann 22 25.29% 1 25.00%
Heiko Carstens 21 24.14% 1 25.00%
Carsten Otte 4 4.60% 1 25.00%
Total 87 100.00% 4 100.00%



void kvm_arch_async_page_not_present(struct kvm_vcpu *vcpu,
				     struct kvm_async_pf *work)
{
	trace_kvm_s390_pfault_init(vcpu, work->arch.pfault_token);
	__kvm_inject_pfault_token(vcpu, true, work->arch.pfault_token);
}

Contributors
Person Tokens Prop Commits CommitProp
Dominik Dingel 28 71.79% 1 50.00%
Heiko Carstens 11 28.21% 1 50.00%
Total 39 100.00% 2 100.00%



void kvm_arch_async_page_present(struct kvm_vcpu *vcpu,
				 struct kvm_async_pf *work)
{
	trace_kvm_s390_pfault_done(vcpu, work->arch.pfault_token);
	__kvm_inject_pfault_token(vcpu, false, work->arch.pfault_token);
}

Contributors
Person Tokens Prop Commits CommitProp
Dominik Dingel 28 71.79% 1 50.00%
Heiko Carstens 11 28.21% 1 50.00%
Total 39 100.00% 2 100.00%



void kvm_arch_async_page_ready(struct kvm_vcpu *vcpu,
			       struct kvm_async_pf *work)
{
	/* s390 will always inject the page directly */
}

Contributors
Person Tokens Prop Commits CommitProp
Marcelo Tosatti 11 68.75% 1 50.00%
Dominik Dingel 5 31.25% 1 50.00%
Total 16 100.00% 2 100.00%



bool kvm_arch_can_inject_async_page_present(struct kvm_vcpu *vcpu)
{
	/*
         * s390 will always inject the page directly,
         * but we still want check_async_completion to cleanup
         */
	return true;
}

Contributors
Person Tokens Prop Commits CommitProp
Marcelo Tosatti 10 71.43% 1 50.00%
Dominik Dingel 4 28.57% 1 50.00%
Total 14 100.00% 2 100.00%



static int kvm_arch_setup_async_pf(struct kvm_vcpu *vcpu)
{
	hva_t hva;
	struct kvm_arch_async_pf arch;
	int rc;

	if (vcpu->arch.pfault_token == KVM_S390_PFAULT_TOKEN_INVALID)
		return 0;
	if ((vcpu->arch.sie_block->gpsw.mask & vcpu->arch.pfault_select) !=
	    vcpu->arch.pfault_compare)
		return 0;
	if (psw_extint_disabled(vcpu))
		return 0;
	if (kvm_s390_vcpu_has_irq(vcpu, 0))
		return 0;
	if (!(vcpu->arch.sie_block->gcr[0] & 0x200ul))
		return 0;
	if (!vcpu->arch.gmap->pfault_enabled)
		return 0;

	hva = gfn_to_hva(vcpu->kvm, gpa_to_gfn(current->thread.gmap_addr));
	hva += current->thread.gmap_addr & ~PAGE_MASK;
	if (read_guest_real(vcpu, vcpu->arch.pfault_token, &arch.pfault_token, 8))
		return 0;

	rc = kvm_setup_async_pf(vcpu, current->thread.gmap_addr, hva, &arch);
	return rc;
}

Contributors
Person Tokens Prop Commits CommitProp
Dominik Dingel 119 61.66% 2 40.00%
Christian Bornträger 52 26.94% 1 20.00%
Heiko Carstens 19 9.84% 1 20.00%
David Hildenbrand 3 1.55% 1 20.00%
Total 193 100.00% 5 100.00%



static int vcpu_pre_run(struct kvm_vcpu *vcpu)
{
	int rc, cpuflags;

	/*
         * On s390 notifications for arriving pages will be delivered directly
         * to the guest but the house keeping for completed pfaults is
         * handled outside the worker.
         */
	kvm_check_async_pf_completion(vcpu);

	vcpu->arch.sie_block->gg14 = vcpu->run->s.regs.gprs[14];
	vcpu->arch.sie_block->gg15 = vcpu->run->s.regs.gprs[15];

	if (need_resched())
		schedule();

	if (test_cpu_flag(CIF_MCCK_PENDING))
		s390_handle_mcck();

	if (!kvm_is_ucontrol(vcpu->kvm)) {
		rc = kvm_s390_deliver_pending_interrupts(vcpu);
		if (rc)
			return rc;
	}

	rc = kvm_s390_handle_requests(vcpu);
	if (rc)
		return rc;

	if (guestdbg_enabled(vcpu)) {
		kvm_s390_backup_guest_per_regs(vcpu);
		kvm_s390_patch_guest_per_regs(vcpu);
	}

	vcpu->arch.sie_block->icptcode = 0;
	cpuflags = atomic_read(&vcpu->arch.sie_block->cpuflags);
	VCPU_EVENT(vcpu, 6, "entering sie flags %x", cpuflags);
	trace_kvm_s390_sie_enter(vcpu, cpuflags);

	return 0;
}

Contributors
Person Tokens Prop Commits CommitProp
Dominik Dingel 51 27.42% 1 7.14%
Christian Bornträger 47 25.27% 4 28.57%
Heiko Carstens 33 17.74% 1 7.14%
Thomas Huth 14 7.53% 1 7.14%
Carsten Otte 13 6.99% 3 21.43%
David Hildenbrand 12 6.45% 1 7.14%
Jens Freimann 11 5.91% 1 7.14%
Cornelia Huck 3 1.61% 1 7.14%
Linus Torvalds 2 1.08% 1 7.14%
Total 186 100.00% 14 100.00%



static int vcpu_post_run_fault_in_sie(struct kvm_vcpu *vcpu)
{
	struct kvm_s390_pgm_info pgm_info = {
		.code = PGM_ADDRESSING,
        };
	u8 opcode, ilen;
	int rc;

	VCPU_EVENT(vcpu, 3, "%s", "fault in sie instruction");
	trace_kvm_s390_sie_fault(vcpu);

	/*
         * We want to inject an addressing exception, which is defined as a
         * suppressing or terminating exception. However, since we came here
         * by a DAT access exception, the PSW still points to the faulting
         * instruction since DAT exceptions are nullifying. So we've got
         * to look up the current opcode to get the length of the instruction
         * to be able to forward the PSW.
         */
	rc = read_guest_instr(vcpu, vcpu->arch.sie_block->gpsw.addr, &opcode, 1);
	ilen = insn_length(opcode);
	if (rc < 0) {
		return rc;
	} else if (rc) {
		/* Instruction-Fetching Exceptions - we can't detect the ilen.
                 * Forward by arbitrary ilc, injection will take care of
                 * nullification if necessary.
                 */
		pgm_info = vcpu->arch.pgm;
		ilen = 4;
	}
	pgm_info.flags = ilen | KVM_S390_PGM_FLAGS_ILC_VALID;
	kvm_s390_forward_psw(vcpu, ilen);
	return kvm_s390_inject_prog_irq(vcpu, &pgm_info);
}

Contributors
Person Tokens Prop Commits CommitProp
Thomas Huth 67 51.15% 1 20.00%
David Hildenbrand 64 48.85% 4 80.00%
Total 131 100.00% 5 100.00%



static int vcpu_post_run(struct kvm_vcpu *vcpu, int exit_reason)
{
	VCPU_EVENT(vcpu, 6, "exit sie icptcode %d",
		   vcpu->arch.sie_block->icptcode);
	trace_kvm_s390_sie_exit(vcpu, vcpu->arch.sie_block->icptcode);

	if (guestdbg_enabled(vcpu))
		kvm_s390_restore_guest_per_regs(vcpu);

	vcpu->run->s.regs.gprs[14] = vcpu->arch.sie_block->gg14;
	vcpu->run->s.regs.gprs[15] = vcpu->arch.sie_block->gg15;

	if (vcpu->arch.sie_block->icptcode > 0) {
		int rc = kvm_handle_sie_intercept(vcpu);

		if (rc != -EOPNOTSUPP)
			return rc;
		vcpu->run->exit_reason = KVM_EXIT_S390_SIEIC;
		vcpu->run->s390_sieic.icptcode = vcpu->arch.sie_block->icptcode;
		vcpu->run->s390_sieic.ipa = vcpu->arch.sie_block->ipa;
		vcpu->run->s390_sieic.ipb = vcpu->arch.sie_block->ipb;
		return -EREMOTE;
	} else if (exit_reason != -EFAULT) {
		vcpu->stat.exit_null++;
		return 0;
	} else if (kvm_is_ucontrol(vcpu->kvm)) {
		vcpu->run->exit_reason = KVM_EXIT_S390_UCONTROL;
		vcpu->run->s390_ucontrol.trans_exc_code =
						current->thread.gmap_addr;
		vcpu->run->s390_ucontrol.pgm_code = 0x10;
		return -EREMOTE;
	} else if (current->thread.gmap_pfault) {
		trace_kvm_s390_major_guest_pfault(vcpu);
		current->thread.gmap_pfault = 0;
		if (kvm_arch_setup_async_pf(vcpu))
			return 0;
		return kvm_arch_fault_in_page(vcpu, current->thread.gmap_addr, 1);
	}
	return vcpu_post_run_fault_in_sie(vcpu);
}

Contributors
Person Tokens Prop Commits CommitProp
David Hildenbrand 144 46.15% 2 11.11%
Dominik Dingel 78 25.00% 3 16.67%
Thomas Huth 38 12.18% 4 22.22%
Christian Bornträger 35 11.22% 3 16.67%
Carsten Otte 10 3.21% 2 11.11%
Martin Schwidefsky 4 1.28% 1 5.56%
Cornelia Huck 1 0.32% 1 5.56%
Marcelo Tosatti 1 0.32% 1 5.56%
Heiko Carstens 1 0.32% 1 5.56%
Total 312 100.00% 18 100.00%



static int __vcpu_run(struct kvm_vcpu *vcpu)
{
	int rc, exit_reason;

	/*
         * We try to hold kvm->srcu during most of vcpu_run (except when run-
         * ning the guest), so that memslots (and other stuff) are protected
         */
	vcpu->srcu_idx = srcu_read_lock(&vcpu->kvm->srcu);

	do {
		rc = vcpu_pre_run(vcpu);
		if (rc)
			break;

		srcu_read_unlock(&vcpu->kvm->srcu, vcpu->srcu_idx);
		/*
                 * As PF_VCPU will be used in fault handler, between
                 * guest_enter and guest_exit should be no uaccess.
                 */
		local_irq_disable();
		guest_enter_irqoff();
		__disable_cpu_timer_accounting(vcpu);
		local_irq_enable();
		exit_reason = sie64a(vcpu->arch.sie_block,
				     vcpu->run->s.regs.gprs);
		local_irq_disable();
		__enable_cpu_timer_accounting(vcpu);
		guest_exit_irqoff();
		local_irq_enable();
		vcpu->srcu_idx = srcu_read_lock(&vcpu->kvm->srcu);

		rc = vcpu_post_run(vcpu, exit_reason);
	} while (!signal_pending(current) && !guestdbg_exit_pending(vcpu) && !rc);

	srcu_read_unlock(&vcpu->kvm->srcu, vcpu->srcu_idx);
	return rc;
}

Contributors
Person Tokens Prop Commits CommitProp
Thomas Huth 85 50.60% 3 20.00%
Heiko Carstens 32 19.05% 1 6.67%
Christian Bornträger 15 8.93% 4 26.67%
Carsten Otte 15 8.93% 3 20.00%
David Hildenbrand 15 8.93% 2 13.33%
Cornelia Huck 4 2.38% 1 6.67%
Paolo Bonzini 2 1.19% 1 6.67%
Total 168 100.00% 15 100.00%



static void sync_regs(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
{
	vcpu->arch.sie_block->gpsw.mask = kvm_run->psw_mask;
	vcpu->arch.sie_block->gpsw.addr = kvm_run->psw_addr;
	if (kvm_run->kvm_dirty_regs & KVM_SYNC_PREFIX)
		kvm_s390_set_prefix(vcpu, kvm_run->s.regs.prefix);
	if (kvm_run->kvm_dirty_regs & KVM_SYNC_CRS) {
		memcpy(&vcpu->arch.sie_block->gcr, &kvm_run->s.regs.crs, 128);
		/* some control register changes require a tlb flush */
		kvm_make_request(KVM_REQ_TLB_FLUSH, vcpu);
	}
	if (kvm_run->kvm_dirty_regs & KVM_SYNC_ARCH0) {
		kvm_s390_set_cpu_timer(vcpu, kvm_run->s.regs.cputm);
		vcpu->arch.sie_block->ckc = kvm_run->s.regs.ckc;
		vcpu->arch.sie_block->todpr = kvm_run->s.regs.todpr;
		vcpu->arch.sie_block->pp = kvm_run->s.regs.pp;
		vcpu->arch.sie_block->gbea = kvm_run->s.regs.gbea;
	}
	if (kvm_run->kvm_dirty_regs & KVM_SYNC_PFAULT) {
		vcpu->arch.pfault_token = kvm_run->s.regs.pft;
		vcpu->arch.pfault_select = kvm_run->s.regs.pfs;
		vcpu->arch.pfault_compare = kvm_run->s.regs.pfc;
		if (vcpu->arch.pfault_token == KVM_S390_PFAULT_TOKEN_INVALID)
			kvm_clear_async_pf_completion_queue(vcpu);
	}
	/*
         * If userspace sets the riccb (e.g. after migration) to a valid state,
         * we should enable RI here instead of doing the lazy enablement.
         */
	if ((kvm_run->kvm_dirty_regs & KVM_SYNC_RICCB) &&
	    test_kvm_facility(vcpu->kvm, 64)) {
		struct runtime_instr_cb *riccb =
			(struct runtime_instr_cb *) &kvm_run->s.regs.riccb;

		if (riccb->valid)
			vcpu->arch.sie_block->ecb3 |= 0x01;
	}
	save_access_regs(vcpu->arch.host_acrs);
	restore_access_regs(vcpu->run->s.regs.acrs);
	/* save host (userspace) fprs/vrs */
	save_fpu_regs();
	vcpu->arch.host_fpregs.fpc = current->thread.fpu.fpc;
	vcpu->arch.host_fpregs.regs = current->thread.fpu.regs;
	if (MACHINE_HAS_VX)
		current->thread.fpu.regs = vcpu->run->s.regs.vrs;
	else
		current->thread.fpu.regs = vcpu->run->s.regs.fprs;
	current->thread.fpu.fpc = vcpu->run->s.regs.fpc;
	if (test_fp_ctl(current->thread.fpu.fpc))
		/* User space provided an invalid FPC, let's clear it */
		current->thread.fpu.fpc = 0;

	kvm_run->kvm_dirty_regs = 0;
}

Contributors
Person Tokens Prop Commits CommitProp
Christian Bornträger 213 45.91% 7 29.17%
David Hildenbrand 110 23.71% 4 16.67%
Fan Zhang 57 12.28% 1 4.17%
Thomas Huth 27 5.82% 4 16.67%
Dominik Dingel 20 4.31% 2 8.33%
Carsten Otte 20 4.31% 3 12.50%
Heiko Carstens 15 3.23% 1 4.17%
Christian Ehrhardt 1 0.22% 1 4.17%
Martin Schwidefsky 1 0.22% 1 4.17%
Total 464 100.00% 24 100.00%



static void store_regs(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
{
	kvm_run->psw_mask = vcpu->arch.sie_block->gpsw.mask;
	kvm_run->psw_addr = vcpu->arch.sie_block->gpsw.addr;
	kvm_run->s.regs.prefix = kvm_s390_get_prefix(vcpu);
	memcpy(&kvm_run->s.regs.crs, &vcpu->arch.sie_block->gcr, 128);
	kvm_run->s.regs.cputm = kvm_s390_get_cpu_timer(vcpu);
	kvm_run->s.regs.ckc = vcpu->arch.sie_block->ckc;
	kvm_run->s.regs.todpr = vcpu->arch.sie_block->todpr;
	kvm_run->s.regs.pp = vcpu->arch.sie_block->pp;
	kvm_run->s.regs.gbea = vcpu->arch.sie_block->gbea;
	kvm_run->s.regs.pft = vcpu->arch.pfault_token;
	kvm_run->s.regs.pfs = vcpu->arch.pfault_select;
	kvm_run->s.regs.pfc = vcpu->arch.pfault_compare;
	save_access_regs(vcpu->run->s.regs.acrs);
	restore_access_regs(vcpu->arch.host_acrs);
	/* Save guest register state */
	save_fpu_regs();
	vcpu->run->s.regs.fpc = current->thread.fpu.fpc;
	/* Restore will be done lazily at return */
	current->thread.fpu.fpc = vcpu->arch.host_fpregs.fpc;
	current->thread.fpu.regs = vcpu->arch.host_fpregs.regs;

}

Contributors
Person Tokens Prop Commits CommitProp
David Hildenbrand 175 63.41% 2 28.57%
Christian Bornträger 92 33.33% 3 42.86%
Thomas Huth 9 3.26% 2 28.57%
Total 276 100.00% 7 100.00%



int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
{
	int rc;
	sigset_t sigsaved;

	if (kvm_run->immediate_exit)
		return -EINTR;

	if (guestdbg_exit_pending(vcpu)) {
		kvm_s390_prepare_debug_exit(vcpu);
		return 0;
	}

	if (vcpu->sigset_active)
		sigprocmask(SIG_SETMASK, &vcpu->sigset, &sigsaved);

	if (!kvm_s390_user_cpu_state_ctrl(vcpu->kvm)) {
		kvm_s390_vcpu_start(vcpu);
	} else if (is_vcpu_stopped(vcpu)) {
		pr_err_ratelimited("can't run stopped vcpu %d\n",
				   vcpu->vcpu_id);
		return -EINVAL;
	}

	sync_regs(vcpu, kvm_run);
	enable_cpu_timer_accounting(vcpu);

	might_fault();
	rc = __vcpu_run(vcpu);

	if (signal_pending(current) && !rc) {
		kvm_run->exit_reason = KVM_EXIT_INTR;
		rc = -EINTR;
	}

	if (guestdbg_exit_pending(vcpu) && !rc)  {
		kvm_s390_prepare_debug_exit(vcpu);
		rc = 0;
	}

	if (rc == -EREMOTE) {
		/* userspace support is needed, kvm_run has been prepared */
		rc = 0;
	}

	disable_cpu_timer_accounting(vcpu);
	store_regs(vcpu, kvm_run);

	if (vcpu->sigset_active)
		sigprocmask(SIG_SETMASK, &sigsaved, NULL);

	vcpu->stat.exit_userspace++;
	return rc;
}

Contributors
Person Tokens Prop Commits CommitProp
David Hildenbrand 148 65.78% 5 31.25%
Dominik Dingel 20 8.89% 2 12.50%
Thomas Huth 17 7.56% 3 18.75%
Heiko Carstens 16 7.11% 1 6.25%
Paolo Bonzini 10 4.44% 1 6.25%
Christian Bornträger 6 2.67% 1 6.25%
Christian Ehrhardt 4 1.78% 1 6.25%
Carsten Otte 3 1.33% 1 6.25%
Konstantin Weitz 1 0.44% 1 6.25%
Total 225 100.00% 16 100.00%

/*
 * store status at address
 * we use have two special cases:
 * KVM_S390_STORE_STATUS_NOADDR: -> 0x1200 on 64 bit
 * KVM_S390_STORE_STATUS_PREFIXED: -> prefix
 */


int kvm_s390_store_status_unloaded(struct kvm_vcpu *vcpu, unsigned long gpa)
{
	unsigned char archmode = 1;
	freg_t fprs[NUM_FPRS];
	unsigned int px;
	u64 clkcomp, cputm;
	int rc;

	px = kvm_s390_get_prefix(vcpu);
	if (gpa == KVM_S390_STORE_STATUS_NOADDR) {
		if (write_guest_abs(vcpu, 163, &archmode, 1))
			return -EFAULT;
		gpa = 0;
	} else if (gpa == KVM_S390_STORE_STATUS_PREFIXED) {
		if (write_guest_real(vcpu, 163, &archmode, 1))
			return -EFAULT;
		gpa = px;
	} else
		gpa -= __LC_FPREGS_SAVE_AREA;

	/* manually convert vector registers if necessary */
	if (MACHINE_HAS_VX) {
		convert_vx_to_fp(fprs, (__vector128 *) vcpu->run->s.regs.vrs);
		rc = write_guest_abs(vcpu, gpa + __LC_FPREGS_SAVE_AREA,
				     fprs, 128);
	} else {
		rc = write_guest_abs(vcpu, gpa + __LC_FPREGS_SAVE_AREA,
				     vcpu->run->s.regs.fprs, 128);
	}
	rc |= write_guest_abs(vcpu, gpa + __LC_GPREGS_SAVE_AREA,
			      vcpu->run->s.regs.gprs, 128);
	rc |= write_guest_abs(vcpu, gpa + __LC_PSW_SAVE_AREA,
			      &vcpu->arch.sie_block->gpsw, 16);
	rc |= write_guest_abs(vcpu, gpa + __LC_PREFIX_SAVE_AREA,
			      &px, 4);
	rc |= write_guest_abs(vcpu, gpa + __LC_FP_CREG_SAVE_AREA,
			      &vcpu->run->s.regs.fpc, 4);
	rc |= write_guest_abs(vcpu, gpa + __LC_TOD_PROGREG_SAVE_AREA,
			      &vcpu->arch.sie_block->todpr, 4);
	cputm = kvm_s390_get_cpu_timer(vcpu);
	rc |= write_guest_abs(vcpu, gpa + __LC_CPU_TIMER_SAVE_AREA,
			      &cputm, 8);
	clkcomp = vcpu->arch.sie_block->ckc >> 8;
	rc |= write_guest_abs(vcpu, gpa + __LC_CLOCK_COMP_SAVE_AREA,
			      &clkcomp, 8);
	rc |= write_guest_abs(vcpu, gpa + __LC_AREGS_SAVE_AREA,
			      &vcpu->run->s.regs.acrs, 64);
	rc |= write_guest_abs(vcpu, gpa + __LC_CREGS_SAVE_AREA,
			      &vcpu->arch.sie_block->gcr, 128);
	return rc ? -EFAULT : 0;
}

Contributors
Person Tokens Prop Commits CommitProp
Heiko Carstens 201 51.54% 3 15.79%
Christian Bornträger 74 18.97% 5 26.32%
David Hildenbrand 68 17.44% 4 21.05%
Martin Schwidefsky 24 6.15% 1 5.26%
Thomas Huth 9 2.31% 2 10.53%
Carsten Otte 9 2.31% 2 10.53%
Michael Müller 3 0.77% 1 5.26%
Christian Ehrhardt 2 0.51% 1 5.26%
Total 390 100.00% 19 100.00%



int kvm_s390_vcpu_store_status(struct kvm_vcpu *vcpu, unsigned long addr)
{
	/*
         * The guest FPRS and ACRS are in the host FPRS/ACRS due to the lazy
         * switch in the run ioctl. Let's update our copies before we save
         * it into the save area
         */
	save_fpu_regs();
	vcpu->run->s.regs.fpc = current->thread.fpu.fpc;
	save_access_regs(vcpu->run->s.regs.acrs);

	return kvm_s390_store_status_unloaded(vcpu, addr);
}

Contributors
Person Tokens Prop Commits CommitProp
Thomas Huth 22 38.60% 1 16.67%
Heiko Carstens 18 31.58% 1 16.67%
Hendrik Brueckner 13 22.81% 2 33.33%
David Hildenbrand 3 5.26% 1 16.67%
Christian Bornträger 1 1.75% 1 16.67%
Total 57 100.00% 6 100.00%



static void __disable_ibs_on_vcpu(struct kvm_vcpu *vcpu)
{
	kvm_check_request(KVM_REQ_ENABLE_IBS, vcpu);
	kvm_s390_sync_request(KVM_REQ_DISABLE_IBS, vcpu);
}

Contributors
Person Tokens Prop Commits CommitProp
David Hildenbrand 17 68.00% 1 33.33%
Heiko Carstens 7 28.00% 1 33.33%
Christian Bornträger 1 4.00% 1 33.33%
Total 25 100.00% 3 100.00%



static void __disable_ibs_on_all_vcpus(struct kvm *kvm)
{
	unsigned int i;
	struct kvm_vcpu *vcpu;

	kvm_for_each_vcpu(i, vcpu, kvm) {
		__disable_ibs_on_vcpu(vcpu);
	}
}

Contributors
Person Tokens Prop Commits CommitProp
David Hildenbrand 28 80.00% 1 50.00%
Heiko Carstens 7 20.00% 1 50.00%
Total 35 100.00% 2 100.00%



static void __enable_ibs_on_vcpu(struct kvm_vcpu *vcpu)
{
	if (!sclp.has_ibs)
		return;
	kvm_check_request(KVM_REQ_DISABLE_IBS, vcpu);
	kvm_s390_sync_request(KVM_REQ_ENABLE_IBS, vcpu);
}

Contributors
Person Tokens Prop Commits CommitProp
David Hildenbrand 26 78.79% 2 50.00%
Heiko Carstens 6 18.18% 1 25.00%
Christian Bornträger 1 3.03% 1 25.00%
Total 33 100.00% 4 100.00%



void kvm_s390_vcpu_start(struct kvm_vcpu *vcpu)
{
	int i, online_vcpus, started_vcpus = 0;

	if (!is_vcpu_stopped(vcpu))
		return;

	trace_kvm_s390_vcpu_start_stop(vcpu->vcpu_id, 1);
	/* Only one cpu at a time may enter/leave the STOPPED state. */
	spin_lock(&vcpu->kvm->arch.start_stop_lock);
	online_vcpus = atomic_read(&vcpu->kvm->online_vcpus);

	for (i = 0; i < online_vcpus; i++) {
		if (!is_vcpu_stopped(vcpu->kvm->vcpus[i]))
			started_vcpus++;
	}

	if (started_vcpus == 0) {
		/* we're the only active VCPU -> speed it up */
		__enable_ibs_on_vcpu(vcpu);
	} else if (started_vcpus == 1) {
		/*
                 * As we are starting a second VCPU, we have to disable
                 * the IBS facility on all VCPUs to remove potentially
                 * oustanding ENABLE requests.
                 */
		__disable_ibs_on_all_vcpus(vcpu->kvm);
	}

	atomic_andnot(CPUSTAT_STOPPED, &vcpu->arch.sie_block->cpuflags);
	/*
         * Another VCPU might have used IBS while we were offline.
         * Let's play safe and flush the VCPU at startup.
         */
	kvm_make_request(KVM_REQ_TLB_FLUSH, vcpu);
	spin_unlock(&vcpu->kvm->arch.start_stop_lock);
	return;
}

Contributors
Person Tokens Prop Commits CommitProp
David Hildenbrand 110 68.32% 4 57.14%
Heiko Carstens 48 29.81% 1 14.29%
Thomas Huth 2 1.24% 1 14.29%
Peter Zijlstra 1 0.62% 1 14.29%
Total 161 100.00% 7 100.00%



void kvm_s390_vcpu_stop(struct kvm_vcpu *vcpu)
{
	int i, online_vcpus, started_vcpus = 0;
	struct kvm_vcpu *started_vcpu = NULL;

	if (is_vcpu_stopped(vcpu))
		return;

	trace_kvm_s390_vcpu_start_stop(vcpu->vcpu_id, 0);
	/* Only one cpu at a time may enter/leave the STOPPED state. */
	spin_lock(&vcpu->kvm->arch.start_stop_lock);
	online_vcpus = atomic_read(&vcpu->kvm->online_vcpus);

	/* SIGP STOP and SIGP STOP AND STORE STATUS has been fully processed */
	kvm_s390_clear_stop_irq(vcpu);

	atomic_or(CPUSTAT_STOPPED, &vcpu->arch.sie_block->cpuflags);
	__disable_ibs_on_vcpu(vcpu);

	for (i = 0; i < online_vcpus; i++) {
		if (!is_vcpu_stopped(vcpu->kvm->vcpus[i])) {
			started_vcpus++;
			started_vcpu = vcpu->kvm->vcpus[i];
		}
	}

	if (started_vcpus == 1) {
		/*
                 * As we only have one VCPU left, we want to enable the
                 * IBS facility for that VCPU to speed it up.
                 */
		__enable_ibs_on_vcpu(started_vcpu);
	}

	spin_unlock(&vcpu->kvm->arch.start_stop_lock);
	return;
}

Contributors
Person Tokens Prop Commits CommitProp
David Hildenbrand 121 72.89% 5 55.56%
Heiko Carstens 23 13.86% 1 11.11%
Thomas Huth 19 11.45% 1 11.11%
Christian Bornträger 2 1.20% 1 11.11%
Peter Zijlstra 1 0.60% 1 11.11%
Total 166 100.00% 9 100.00%



static int kvm_vcpu_ioctl_enable_cap(struct kvm_vcpu *vcpu,
				     struct kvm_enable_cap *cap)
{
	int r;

	if (cap->flags)
		return -EINVAL;

	switch (cap->cap) {
	case KVM_CAP_S390_CSS_SUPPORT:
		if (!vcpu->kvm->arch.css_support) {
			vcpu->kvm->arch.css_support = 1;
			VM_EVENT(vcpu->kvm, 3, "%s", "ENABLE: CSS support");
			trace_kvm_s390_enable_css(vcpu->kvm);
		}
		r = 0;
		break;
	default:
		r = -EINVAL;
		break;
	}
	return r;
}

Contributors
Person Tokens Prop Commits CommitProp
Cornelia Huck 85 86.73% 2 66.67%
Christian Bornträger 13 13.27% 1 33.33%
Total 98 100.00% 3 100.00%



static long kvm_s390_guest_mem_op(struct kvm_vcpu *vcpu,
				  struct kvm_s390_mem_op *mop)
{
	void __user *uaddr = (void __user *)mop->buf;
	void *tmpbuf = NULL;
	int r, srcu_idx;
	const u64 supported_flags = KVM_S390_MEMOP_F_INJECT_EXCEPTION
				    | KVM_S390_MEMOP_F_CHECK_ONLY;

	if (mop->flags & ~supported_flags)
		return -EINVAL;

	if (mop->size > MEM_OP_MAX_SIZE)
		return -E2BIG;

	if (!(mop->flags & KVM_S390_MEMOP_F_CHECK_ONLY)) {
		tmpbuf = vmalloc(mop->size);
		if (!tmpbuf)
			return -ENOMEM;
	}

	srcu_idx = srcu_read_lock(&vcpu->kvm->srcu);

	switch (mop->op) {
	case KVM_S390_MEMOP_LOGICAL_READ:
		if (mop->flags & KVM_S390_MEMOP_F_CHECK_ONLY) {
			r = check_gva_range(vcpu, mop->gaddr, mop->ar,
					    mop->size, GACC_FETCH);
			break;
		}
		r = read_guest(vcpu, mop->gaddr, mop->ar, tmpbuf, mop->size);
		if (r == 0) {
			if (copy_to_user(uaddr, tmpbuf, mop->size))
				r = -EFAULT;
		}
		break;
	case KVM_S390_MEMOP_LOGICAL_WRITE:
		if (mop->flags & KVM_S390_MEMOP_F_CHECK_ONLY) {
			r = check_gva_range(vcpu, mop->gaddr, mop->ar,
					    mop->size, GACC_STORE);
			break;
		}
		if (copy_from_user(tmpbuf, uaddr, mop->size)) {
			r = -EFAULT;
			break;
		}
		r = write_guest(vcpu, mop->gaddr, mop->ar, tmpbuf, mop->size);
		break;
	default:
		r = -EINVAL;
	}

	srcu_read_unlock(&vcpu->kvm->srcu, srcu_idx);

	if (r > 0 && (mop->flags & KVM_S390_MEMOP_F_INJECT_EXCEPTION) != 0)
		kvm_s390_inject_prog_irq(vcpu, &vcpu->arch.pgm);

	vfree(tmpbuf);
	return r;
}

Contributors
Person Tokens Prop Commits CommitProp
Thomas Huth 320 94.12% 1 25.00%
Cornelia Huck 18 5.29% 2 50.00%
David Hildenbrand 2 0.59% 1 25.00%
Total 340 100.00% 4 100.00%



long kvm_arch_vcpu_ioctl(struct file *filp,
			 unsigned int ioctl, unsigned long arg)
{
	struct kvm_vcpu *vcpu = filp->private_data;
	void __user *argp = (void __user *)arg;
	int idx;
	long r;

	switch (ioctl) {
	case KVM_S390_IRQ: {
		struct kvm_s390_irq s390irq;

		r = -EFAULT;
		if (copy_from_user(&s390irq, argp, sizeof(s390irq)))
			break;
		r = kvm_s390_inject_vcpu(vcpu, &s390irq);
		break;
	}
	case KVM_S390_INTERRUPT: {
		struct kvm_s390_interrupt s390int;
		struct kvm_s390_irq s390irq;

		r = -EFAULT;
		if (copy_from_user(&s390int, argp, sizeof(s390int)))
			break;
		if (s390int_to_s390irq(&s390int, &s390irq))
			return -EINVAL;
		r = kvm_s390_inject_vcpu(vcpu, &s390irq);
		break;
	}
	case KVM_S390_STORE_STATUS:
		idx = srcu_read_lock(&vcpu->kvm->srcu);
		r = kvm_s390_vcpu_store_status(vcpu, arg);
		srcu_read_unlock(&vcpu->kvm->srcu, idx);
		break;
	case KVM_S390_SET_INITIAL_PSW: {
		psw_t psw;

		r = -EFAULT;
		if (copy_from_user(&psw, argp, sizeof(psw)))
			break;
		r = kvm_arch_vcpu_ioctl_set_initial_psw(vcpu, psw);
		break;
	}
	case KVM_S390_INITIAL_RESET:
		r = kvm_arch_vcpu_ioctl_initial_reset(vcpu);
		break;
	case KVM_SET_ONE_REG:
	case KVM_GET_ONE_REG: {
		struct kvm_one_reg reg;
		r = -EFAULT;
		if (copy_from_user(&reg, argp, sizeof(reg)))
			break;
		if (ioctl == KVM_SET_ONE_REG)
			r = kvm_arch_vcpu_ioctl_set_one_reg(vcpu, &reg);
		else
			r = kvm_arch_vcpu_ioctl_get_one_reg(vcpu, &reg);
		break;
	}
#ifdef CONFIG_KVM_S390_UCONTROL
	case KVM_S390_UCAS_MAP: {
		struct kvm_s390_ucas_mapping ucasmap;

		if (copy_from_user(&ucasmap, argp, sizeof(ucasmap))) {
			r = -EFAULT;
			break;
		}

		if (!kvm_is_ucontrol(vcpu->kvm)) {
			r = -EINVAL;
			break;
		}

		r = gmap_map_segment(vcpu->arch.gmap, ucasmap.user_addr,
				     ucasmap.vcpu_addr, ucasmap.length);
		break;
	}
	case KVM_S390_UCAS_UNMAP: {
		struct kvm_s390_ucas_mapping ucasmap;

		if (copy_from_user(&ucasmap, argp, sizeof(ucasmap))) {
			r = -EFAULT;
			break;
		}

		if (!kvm_is_ucontrol(vcpu->kvm)) {
			r = -EINVAL;
			break;
		}

		r = gmap_unmap_segment(vcpu->arch.gmap, ucasmap.vcpu_addr,
			ucasmap.length);
		break;
	}
#endif
	case KVM_S390_VCPU_FAULT: {
		r = gmap_fault(vcpu->arch.gmap, arg, 0);
		break;
	}
	case KVM_ENABLE_CAP:
	{
		struct kvm_enable_cap cap;
		r = -EFAULT;
		if (copy_from_user(&cap, argp, sizeof(cap)))
			break;
		r = kvm_vcpu_ioctl_enable_cap(vcpu, &cap);
		break;
	}
	case KVM_S390_MEM_OP: {
		struct kvm_s390_mem_op mem_op;

		if (copy_from_user(&mem_op, argp, sizeof(mem_op)) == 0)
			r = kvm_s390_guest_mem_op(vcpu, &mem_op);
		else
			r = -EFAULT;
		break;
	}
	case KVM_S390_SET_IRQ_STATE: {
		struct kvm_s390_irq_state irq_state;

		r = -EFAULT;
		if (copy_from_user(&irq_state, argp, sizeof(irq_state)))
			break;
		if (irq_state.len > VCPU_IRQS_MAX_BUF ||
		    irq_state.len == 0 ||
		    irq_state.len % sizeof(struct kvm_s390_irq) > 0) {
			r = -EINVAL;
			break;
		}
		r = kvm_s390_set_irq_state(vcpu,
					   (void __user *) irq_state.buf,
					   irq_state.len);
		break;
	}
	case KVM_S390_GET_IRQ_STATE: {
		struct kvm_s390_irq_state irq_state;

		r = -EFAULT;
		if (copy_from_user(&irq_state, argp, sizeof(irq_state)))
			break;
		if (irq_state.len == 0) {
			r = -EINVAL;
			break;
		}
		r = kvm_s390_get_irq_state(vcpu,
					   (__u8 __user *)  irq_state.buf,
					   irq_state.len);
		break;
	}
	default:
		r = -ENOTTY;
	}
	return r;
}

Contributors
Person Tokens Prop Commits CommitProp
Carsten Otte 255 35.66% 5 31.25%
Jens Freimann 213 29.79% 3 18.75%
Heiko Carstens 88 12.31% 1 6.25%
Thomas Huth 70 9.79% 2 12.50%
Avi Kivity 44 6.15% 2 12.50%
Cornelia Huck 41 5.73% 1 6.25%
Martin Schwidefsky 4 0.56% 2 12.50%
Total 715 100.00% 16 100.00%



int kvm_arch_vcpu_fault(struct kvm_vcpu *vcpu, struct vm_fault *vmf)
{
#ifdef CONFIG_KVM_S390_UCONTROL
	if ((vmf->pgoff == KVM_S390_SIE_PAGE_OFFSET)
		 && (kvm_is_ucontrol(vcpu->kvm))) {
		vmf->page = virt_to_page(vcpu->arch.sie_block);
		get_page(vmf->page);
		return 0;
	}
#endif
	return VM_FAULT_SIGBUS;
}

Contributors
Person Tokens Prop Commits CommitProp
Carsten Otte 67 100.00% 1 100.00%
Total 67 100.00% 1 100.00%



int kvm_arch_create_memslot(struct kvm *kvm, struct kvm_memory_slot *slot,
			    unsigned long npages)
{
	return 0;
}

Contributors
Person Tokens Prop Commits CommitProp
Takuya Yoshikawa 17 77.27% 1 50.00%
Aneesh Kumar K.V 5 22.73% 1 50.00%
Total 22 100.00% 2 100.00%

/* Section: memory related */


int kvm_arch_prepare_memory_region(struct kvm *kvm,
				   struct kvm_memory_slot *memslot,
				   const struct kvm_userspace_memory_region *mem,
				   enum kvm_mr_change change)
{
	/* A few sanity checks. We can have memory slots which have to be
           located/ended at a segment boundary (1MB). The memory in userland is
           ok to be fragmented into various different vmas. It is okay to mmap()
           and munmap() stuff in this slot after doing this call at any time */

	if (mem->userspace_addr & 0xffffful)
		return -EINVAL;

	if (mem->memory_size & 0xffffful)
		return -EINVAL;

	if (mem->guest_phys_addr + mem->memory_size > kvm->arch.mem_limit)
		return -EINVAL;

	return 0;
}

Contributors
Person Tokens Prop Commits CommitProp
Heiko Carstens 35 47.95% 1 14.29%
Dominik Dingel 20 27.40% 1 14.29%
Marcelo Tosatti 10 13.70% 1 14.29%
Takuya Yoshikawa 4 5.48% 1 14.29%
Carsten Otte 2 2.74% 1 14.29%
Paolo Bonzini 1 1.37% 1 14.29%
Nick Wang 1 1.37% 1 14.29%
Total 73 100.00% 7 100.00%



void kvm_arch_commit_memory_region(struct kvm *kvm,
				const struct kvm_userspace_memory_region *mem,
				const struct kvm_memory_slot *old,
				const struct kvm_memory_slot *new,
				enum kvm_mr_change change)
{
	int rc;

	/* If the basics of the memslot do not change, we do not want
         * to update the gmap. Every update causes several unnecessary
         * segment translation exceptions. This is usually handled just
         * fine by the normal fault handler + gmap, but it will also
         * cause faults on the prefix page of running guest CPUs.
         */
	if (old->userspace_addr == mem->userspace_addr &&
	    old->base_gfn * PAGE_SIZE == mem->guest_phys_addr &&
	    old->npages * PAGE_SIZE == mem->memory_size)
		return;

	rc = gmap_map_segment(kvm->arch.gmap, mem->userspace_addr,
		mem->guest_phys_addr, mem->memory_size);
	if (rc)
		pr_warn("failed to commit memory region\n");
	return;
}

Contributors
Person Tokens Prop Commits CommitProp
Christian Bornträger 32 32.00% 1 10.00%
Carsten Otte 31 31.00% 2 20.00%
Marcelo Tosatti 20 20.00% 1 10.00%
Paolo Bonzini 7 7.00% 2 20.00%
Takuya Yoshikawa 6 6.00% 1 10.00%
David Hildenbrand 2 2.00% 1 10.00%
Gleb Natapov 1 1.00% 1 10.00%
Heiko Carstens 1 1.00% 1 10.00%
Total 100 100.00% 10 100.00%



static inline unsigned long nonhyp_mask(int i)
{
	unsigned int nonhyp_fai = (sclp.hmfai << i * 2) >> 30;

	return 0x0000ffffffffffffUL >> (nonhyp_fai << 4);
}

Contributors
Person Tokens Prop Commits CommitProp
Alexander Yarygin 36 100.00% 1 100.00%
Total 36 100.00% 1 100.00%



void kvm_arch_vcpu_block_finish(struct kvm_vcpu *vcpu)
{
	vcpu->valid_wakeup = false;
}

Contributors
Person Tokens Prop Commits CommitProp
Christian Bornträger 16 100.00% 1 100.00%
Total 16 100.00% 1 100.00%



static int __init kvm_s390_init(void)
{
	int i;

	if (!sclp.has_sief2) {
		pr_info("SIE not available\n");
		return -ENODEV;
	}

	for (i = 0; i < 16; i++)
		kvm_s390_fac_list_mask[i] |=
			S390_lowcore.stfle_fac_list[i] & nonhyp_mask(i);

	return kvm_init(NULL, sizeof(struct kvm_vcpu), 0, THIS_MODULE);
}

Contributors
Person Tokens Prop Commits CommitProp
Alexander Yarygin 33 43.42% 1 20.00%
Heiko Carstens 22 28.95% 1 20.00%
David Hildenbrand 18 23.68% 1 20.00%
Avi Kivity 2 2.63% 1 20.00%
Michael Müller 1 1.32% 1 20.00%
Total 76 100.00% 5 100.00%



static void __exit kvm_s390_exit(void)
{
	kvm_exit();
}

Contributors
Person Tokens Prop Commits CommitProp
Heiko Carstens 12 100.00% 1 100.00%
Total 12 100.00% 1 100.00%


module_init(kvm_s390_init);

module_exit(kvm_s390_exit);

/*
 * Enable autoloading of the kvm module.
 * Note that we add the module alias here instead of virt/kvm/kvm_main.c
 * since x86 takes a different approach.
 */
#include <linux/miscdevice.h>

MODULE_ALIAS_MISCDEV(KVM_MINOR);
MODULE_ALIAS("devname:kvm");
Overall Contributors
Person Tokens Prop Commits CommitProp
David Hildenbrand 3835 22.23% 83 25.86%
Christian Bornträger 2197 12.74% 57 17.76%
Heiko Carstens 1850 10.72% 9 2.80%
Dominik Dingel 1422 8.24% 17 5.30%
Jason J. Herne 1291 7.48% 5 1.56%
Carsten Otte 1136 6.59% 21 6.54%
Michael Müller 1024 5.94% 11 3.43%
Eugene (jno) Dvurechenski 858 4.97% 5 1.56%
Thomas Huth 735 4.26% 10 3.12%
Tony Krowiak 683 3.96% 4 1.25%
Cornelia Huck 474 2.75% 13 4.05%
Fan Zhang 317 1.84% 3 0.93%
Jens Freimann 289 1.68% 7 2.18%
Martin Schwidefsky 232 1.34% 15 4.67%
Guenther Hutzl 108 0.63% 4 1.25%
Janosch Frank 92 0.53% 5 1.56%
Marcelo Tosatti 85 0.49% 3 0.93%
Alexander Yarygin 81 0.47% 2 0.62%
Eric Farman 77 0.45% 3 0.93%
Paolo Bonzini 61 0.35% 8 2.49%
Gleb Natapov 48 0.28% 1 0.31%
Avi Kivity 47 0.27% 4 1.25%
Konstantin Weitz 45 0.26% 2 0.62%
Maxim Samoylov 35 0.20% 1 0.31%
Takuya Yoshikawa 27 0.16% 3 0.93%
Wei Yongjun 25 0.14% 1 0.31%
Christian Ehrhardt 25 0.14% 3 0.93%
Luiz Fernando N. Capitulino 23 0.13% 1 0.31%
Ekaterina Tumanova 19 0.11% 1 0.31%
Julius Niedworok 16 0.09% 2 0.62%
Peter Zijlstra 15 0.09% 1 0.31%
Hendrik Brueckner 13 0.08% 2 0.62%
Linus Torvalds 12 0.07% 2 0.62%
Jan Kiszka 12 0.07% 2 0.62%
Alexander Graf 10 0.06% 2 0.62%
Christoffer Dall 9 0.05% 1 0.31%
Nick Wang 9 0.05% 2 0.62%
Aneesh Kumar K.V 5 0.03% 1 0.31%
Paul Gortmaker 3 0.02% 1 0.31%
Ingo Molnar 3 0.02% 1 0.31%
Nicholas Krause 2 0.01% 1 0.31%
David Howells 1 0.01% 1 0.31%
Total 17251 100.00% 321 100.00%
Directory: arch/s390/kvm

Information contained on this website is for historical information purposes only and does not indicate or represent copyright ownership.
Created with cregit.
Person	Tokens	Prop	Commits	CommitProp
Michael Müller	24	100.00%	2	100.00%
Total	24	100.00%	2	100.00%
cregit-Linux how code gets into the kernel

Release 4.11 arch/s390/kvm/kvm-s390.c

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