Release 4.15 arch/s390/kvm/kvm-s390.c

Directory: arch/s390/kvm
// SPDX-License-Identifier: GPL-2.0
/*
 * hosting IBM Z kernel virtual machines (s390x)
 *
 * Copyright IBM Corp. 2008, 2017
 *
 *    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 <linux/string.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 }
};


struct kvm_s390_tod_clock_ext {
	
__u8 epoch_idx;
	
__u64 tod;
	
__u8 reserved[7];

} __packed;

/* 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
Person Tokens Prop Commits CommitProp
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
Person Tokens Prop Commits CommitProp
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%
Christian Bornträger 4 23.53% 1 33.33%
Heiko Carstens 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_PRNO, (cpacf_mask_t *)
			      kvm_s390_available_subfunc.ppno);

	if (test_facility(146)) /* MSA8 */
		__cpacf_query(CPACF_KMA, (cpacf_mask_t *)
			      kvm_s390_available_subfunc.kma);

	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);
	if (sclp.has_kss)
		allow_cpu_feat(KVM_S390_VM_CPU_FEAT_KSS);
	/*
         * 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 316 78.41% 12 66.67%
Martin Schwidefsky 44 10.92% 1 5.56%
Jason J. Herne 21 5.21% 1 5.56%
Farhan Ali 11 2.73% 1 5.56%
Linus Torvalds 9 2.23% 1 5.56%
Harald Freudenberger 1 0.25% 1 5.56%
Heiko Carstens 1 0.25% 1 5.56%
Total 403 100.00% 18 100.00%



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
Person Tokens Prop Commits CommitProp
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:
	case KVM_CAP_S390_CMMA_MIGRATION:
	case KVM_CAP_S390_AIS:
	case KVM_CAP_S390_AIS_MIGRATION:
		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;
	case KVM_CAP_S390_GS:
		r = test_facility(133);
		break;
	case KVM_CAP_S390_BPB:
		r = test_facility(82);
		break;
	default:
		r = 0;
	}
	return r;
}

Contributors
Person Tokens Prop Commits CommitProp
Christian Bornträger 40 18.52% 7 17.50%
Carsten Otte 35 16.20% 4 10.00%
David Hildenbrand 31 14.35% 5 12.50%
Fan Zhang 22 10.19% 2 5.00%
Cornelia Huck 15 6.94% 5 12.50%
Jens Freimann 9 4.17% 3 7.50%
Heiko Carstens 8 3.70% 1 2.50%
Nick Wang 8 3.70% 1 2.50%
Thomas Huth 8 3.70% 1 2.50%
Eric Farman 8 3.70% 1 2.50%
Alexander Graf 6 2.78% 1 2.50%
Dominik Dingel 6 2.78% 2 5.00%
Eugene (jno) Dvurechenski 4 1.85% 1 2.50%
Jason J. Herne 3 1.39% 1 2.50%
Paolo Bonzini 3 1.39% 1 2.50%
Yi Min Zhao 3 1.39% 1 2.50%
Claudio Imbrenda 3 1.39% 1 2.50%
Ekaterina Tumanova 3 1.39% 1 2.50%
Martin Schwidefsky 1 0.46% 1 2.50%
Total 216 100.00% 40 100.00%



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_AIS:
		mutex_lock(&kvm->lock);
		if (kvm->created_vcpus) {
			r = -EBUSY;
		} else {
			set_kvm_facility(kvm->arch.model.fac_mask, 72);
			set_kvm_facility(kvm->arch.model.fac_list, 72);
			r = 0;
		}
		mutex_unlock(&kvm->lock);
		VM_EVENT(kvm, 3, "ENABLE: AIS %s",
			 r ? "(not available)" : "(success)");
		break;
	case KVM_CAP_S390_GS:
		r = -EINVAL;
		mutex_lock(&kvm->lock);
		if (atomic_read(&kvm->online_vcpus)) {
			r = -EBUSY;
		} else if (test_facility(133)) {
			set_kvm_facility(kvm->arch.model.fac_mask, 133);
			set_kvm_facility(kvm->arch.model.fac_list, 133);
			r = 0;
		}
		mutex_unlock(&kvm->lock);
		VM_EVENT(kvm, 3, "ENABLE: CAP_S390_GS %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 187 31.59% 2 12.50%
Yi Min Zhao 81 13.68% 1 6.25%
David Hildenbrand 81 13.68% 4 25.00%
Cornelia Huck 63 10.64% 2 12.50%
Christian Bornträger 48 8.11% 1 6.25%
Maxim Samoylov 35 5.91% 1 6.25%
Guenther Hutzl 35 5.91% 1 6.25%
Michael Müller 29 4.90% 1 6.25%
Ekaterina Tumanova 16 2.70% 1 6.25%
Eric Farman 15 2.53% 1 6.25%
Paolo Bonzini 2 0.34% 1 6.25%
Total 592 100.00% 16 100.00%



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 void kvm_s390_sync_request_broadcast(struct kvm *kvm, int req)
{
	int cx;
	struct kvm_vcpu *vcpu;

	kvm_for_each_vcpu(cx, vcpu, kvm)
		kvm_s390_sync_request(req, vcpu);
}

Contributors
Person Tokens Prop Commits CommitProp
Claudio Imbrenda 18 48.65% 1 33.33%
Jason J. Herne 15 40.54% 1 33.33%
Christian Bornträger 4 10.81% 1 33.33%
Total 37 100.00% 3 100.00%

/*
 * Must be called with kvm->srcu held to avoid races on memslots, and with
 * kvm->slots_lock to avoid races with ourselves and kvm_s390_vm_stop_migration.
 */


static int kvm_s390_vm_start_migration(struct kvm *kvm)
{
	struct kvm_s390_migration_state *mgs;
	struct kvm_memory_slot *ms;
	/* should be the only one */
	struct kvm_memslots *slots;
	unsigned long ram_pages;
	int slotnr;

	/* migration mode already enabled */
	if (kvm->arch.migration_state)
		return 0;

	slots = kvm_memslots(kvm);
	if (!slots || !slots->used_slots)
		return -EINVAL;

	mgs = kzalloc(sizeof(*mgs), GFP_KERNEL);
	if (!mgs)
		return -ENOMEM;
	kvm->arch.migration_state = mgs;

	if (kvm->arch.use_cmma) {
		/*
                 * Get the first slot. They are reverse sorted by base_gfn, so
                 * the first slot is also the one at the end of the address
                 * space. We have verified above that at least one slot is
                 * present.
                 */
		ms = slots->memslots;
		/* round up so we only use full longs */
		ram_pages = roundup(ms->base_gfn + ms->npages, BITS_PER_LONG);
		/* allocate enough bytes to store all the bits */
		mgs->pgste_bitmap = vmalloc(ram_pages / 8);
		if (!mgs->pgste_bitmap) {
			kfree(mgs);
			kvm->arch.migration_state = NULL;
			return -ENOMEM;
		}

		mgs->bitmap_size = ram_pages;
		atomic64_set(&mgs->dirty_pages, ram_pages);
		/* mark all the pages in active slots as dirty */
		for (slotnr = 0; slotnr < slots->used_slots; slotnr++) {
			ms = slots->memslots + slotnr;
			bitmap_set(mgs->pgste_bitmap, ms->base_gfn, ms->npages);
		}

		kvm_s390_sync_request_broadcast(kvm, KVM_REQ_START_MIGRATION);
	}
	return 0;
}

Contributors
Person Tokens Prop Commits CommitProp
Claudio Imbrenda 171 72.77% 1 20.00%
Jason J. Herne 52 22.13% 1 20.00%
Christian Bornträger 12 5.11% 3 60.00%
Total 235 100.00% 5 100.00%

/*
 * Must be called with kvm->slots_lock to avoid races with ourselves and
 * kvm_s390_vm_start_migration.
 */


static int kvm_s390_vm_stop_migration(struct kvm *kvm)
{
	struct kvm_s390_migration_state *mgs;

	/* migration mode already disabled */
	if (!kvm->arch.migration_state)
		return 0;
	mgs = kvm->arch.migration_state;
	kvm->arch.migration_state = NULL;

	if (kvm->arch.use_cmma) {
		kvm_s390_sync_request_broadcast(kvm, KVM_REQ_STOP_MIGRATION);
		/* We have to wait for the essa emulation to finish */
		synchronize_srcu(&kvm->srcu);
		vfree(mgs->pgste_bitmap);
	}
	kfree(mgs);
	return 0;
}

Contributors
Person Tokens Prop Commits CommitProp
Claudio Imbrenda 51 59.30% 1 20.00%
Jason J. Herne 20 23.26% 1 20.00%
Christian Bornträger 14 16.28% 2 40.00%
Fan Zhang 1 1.16% 1 20.00%
Total 86 100.00% 5 100.00%



static int kvm_s390_vm_set_migration(struct kvm *kvm,
				     struct kvm_device_attr *attr)
{
	int res = -ENXIO;

	mutex_lock(&kvm->slots_lock);
	switch (attr->attr) {
	case KVM_S390_VM_MIGRATION_START:
		res = kvm_s390_vm_start_migration(kvm);
		break;
	case KVM_S390_VM_MIGRATION_STOP:
		res = kvm_s390_vm_stop_migration(kvm);
		break;
	default:
		break;
	}
	mutex_unlock(&kvm->slots_lock);

	return res;
}

Contributors
Person Tokens Prop Commits CommitProp
Jason J. Herne 41 56.16% 1 25.00%
Claudio Imbrenda 21 28.77% 1 25.00%
Tony Krowiak 9 12.33% 1 25.00%
Christian Bornträger 2 2.74% 1 25.00%
Total 73 100.00% 4 100.00%



static int kvm_s390_vm_get_migration(struct kvm *kvm,
				     struct kvm_device_attr *attr)
{
	u64 mig = (kvm->arch.migration_state != NULL);

	if (attr->attr != KVM_S390_VM_MIGRATION_STATUS)
		return -ENXIO;

	if (copy_to_user((void __user *)attr->addr, &mig, sizeof(mig)))
		return -EFAULT;
	return 0;
}

Contributors
Person Tokens Prop Commits CommitProp
Claudio Imbrenda 33 47.14% 1 33.33%
Michael Müller 30 42.86% 1 33.33%
Tony Krowiak 7 10.00% 1 33.33%
Total 70 100.00% 3 100.00%



static int kvm_s390_set_tod_ext(struct kvm *kvm, struct kvm_device_attr *attr)
{
	struct kvm_s390_vm_tod_clock gtod;

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

	if (test_kvm_facility(kvm, 139))
		kvm_s390_set_tod_clock_ext(kvm, &gtod);
	else if (gtod.epoch_idx == 0)
		kvm_s390_set_tod_clock(kvm, gtod.tod);
	else
		return -EINVAL;

	VM_EVENT(kvm, 3, "SET: TOD extension: 0x%x, TOD base: 0x%llx",
		gtod.epoch_idx, gtod.tod);

	return 0;
}

Contributors
Person Tokens Prop Commits CommitProp
Collin L. Walling 106 100.00% 1 100.00%
Total 106 100.00% 1 100.00%



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 36 52.17% 1 16.67%
Michael Müller 19 27.54% 1 16.67%
Christian Bornträger 11 15.94% 3 50.00%
David Hildenbrand 3 4.35% 1 16.67%
Total 69 100.00% 6 100.00%



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
David Hildenbrand 41 62.12% 4 44.44%
Jason J. Herne 12 18.18% 1 11.11%
Michael Müller 7 10.61% 1 11.11%
Christian Bornträger 6 9.09% 3 33.33%
Total 66 100.00% 9 100.00%



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_EXT:
		ret = kvm_s390_set_tod_ext(kvm, attr);
		break;
	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
Michael Müller 40 46.51% 1 20.00%
Jason J. Herne 18 20.93% 1 20.00%
David Hildenbrand 15 17.44% 2 40.00%
Collin L. Walling 13 15.12% 1 20.00%
Total 86 100.00% 5 100.00%



static void kvm_s390_get_tod_clock_ext(struct kvm *kvm,
					struct kvm_s390_vm_tod_clock *gtod)
{
	struct kvm_s390_tod_clock_ext htod;

	preempt_disable();

	get_tod_clock_ext((char *)&htod);

	gtod->tod = htod.tod + kvm->arch.epoch;
	gtod->epoch_idx = htod.epoch_idx + kvm->arch.epdx;

	if (gtod->tod < htod.tod)
		gtod->epoch_idx += 1;

	preempt_enable();
}

Contributors
Person Tokens Prop Commits CommitProp
Collin L. Walling 80 100.00% 1 100.00%
Total 80 100.00% 1 100.00%



static int kvm_s390_get_tod_ext(struct kvm *kvm, struct kvm_device_attr *attr)
{
	struct kvm_s390_vm_tod_clock gtod;

	memset(&gtod, 0, sizeof(gtod));

	if (test_kvm_facility(kvm, 139))
		kvm_s390_get_tod_clock_ext(kvm, &gtod);
	else
		gtod.tod = 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 extension: 0x%x, TOD base: 0x%llx",
		gtod.epoch_idx, gtod.tod);
	return 0;
}

Contributors
Person Tokens Prop Commits CommitProp
Collin L. Walling 101 95.28% 1 33.33%
Michael Müller 3 2.83% 1 33.33%
David Hildenbrand 2 1.89% 1 33.33%
Total 106 100.00% 3 100.00%



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 25 40.98% 1 20.00%
Michael Müller 24 39.34% 1 20.00%
Christian Bornträger 12 19.67% 3 60.00%
Total 61 100.00% 5 100.00%



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
Michael Müller 27 40.91% 1 16.67%
Jason J. Herne 25 37.88% 1 16.67%
Christian Bornträger 12 18.18% 3 50.00%
David Hildenbrand 2 3.03% 1 16.67%
Total 66 100.00% 6 100.00%



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_EXT:
		ret = kvm_s390_get_tod_ext(kvm, attr);
		break;
	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 41 47.67% 1 25.00%
Michael Müller 32 37.21% 2 50.00%
Collin L. Walling 13 15.12% 1 25.00%
Total 86 100.00% 4 100.00%



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 161 52.61% 1 12.50%
David Hildenbrand 74 24.18% 4 50.00%
Christian Bornträger 70 22.88% 2 25.00%
Paolo Bonzini 1 0.33% 1 12.50%
Total 306 100.00% 8 100.00%



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 99 75.57% 2 66.67%
Michael Müller 32 24.43% 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
David Hildenbrand 44 61.11% 2 66.67%
Michael Müller 28 38.89% 1 33.33%
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 92 46.00% 1 8.33%
Christian Bornträger 63 31.50% 2 16.67%
Dominik Dingel 20 10.00% 2 16.67%
Jason J. Herne 8 4.00% 1 8.33%
Heiko Carstens 6 3.00% 1 8.33%
Carsten Otte 4 2.00% 2 16.67%
Tony Krowiak 3 1.50% 1 8.33%
Jan Kiszka 3 1.50% 1 8.33%
David Hildenbrand 1 0.50% 1 8.33%
Total 200 100.00% 12 100.00%



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 117 48.95% 2 22.22%
Christian Bornträger 91 38.08% 2 22.22%
Dominik Dingel 19 7.95% 2 22.22%
Jason J. Herne 8 3.35% 1 11.11%
David Hildenbrand 4 1.67% 2 22.22%
Total 239 100.00% 9 100.00%



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 49 44.14% 1 25.00%
David Hildenbrand 48 43.24% 2 50.00%
Tony Krowiak 14 12.61% 1 25.00%
Total 111 100.00% 4 100.00%



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;
	case KVM_S390_VM_MIGRATION:
		ret = kvm_s390_vm_set_migration(kvm, attr);
		break;
	default:
		ret = -ENXIO;
		break;
	}

	return ret;
}

Contributors
Person Tokens Prop Commits CommitProp
Dominik Dingel 31 30.39% 3 25.00%
Jason J. Herne 13 12.75% 1 8.33%
Michael Müller 13 12.75% 1 8.33%
Tony Krowiak 13 12.75% 1 8.33%
Claudio Imbrenda 13 12.75% 1 8.33%
Carsten Otte 8 7.84% 2 16.67%
Heiko Carstens 7 6.86% 1 8.33%
Jan Kiszka 3 2.94% 1 8.33%
Christian Bornträger 1 0.98% 1 8.33%
Total 102 100.00% 12 100.00%



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;
	case KVM_S390_VM_MIGRATION:
		ret = kvm_s390_vm_get_migration(kvm, attr);
		break;
	default:
		ret = -ENXIO;
		break;
	}

	return ret;
}

Contributors
Person Tokens Prop Commits CommitProp
Dominik Dingel 50 56.18% 2 40.00%
Claudio Imbrenda 13 14.61% 1 20.00%
Jason J. Herne 13 14.61% 1 20.00%
Michael Müller 13 14.61% 1 20.00%
Total 89 100.00% 5 100.00%



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;
	case KVM_S390_VM_MIGRATION:
		ret = 0;
		break;
	default:
		ret = -ENXIO;
		break;
	}

	return ret;
}

Contributors
Person Tokens Prop Commits CommitProp
Dominik Dingel 70 35.18% 3 30.00%
Tony Krowiak 36 18.09% 1 10.00%
Jason J. Herne 30 15.08% 1 10.00%
Michael Müller 30 15.08% 1 10.00%
David Hildenbrand 25 12.56% 3 30.00%
Claudio Imbrenda 8 4.02% 1 10.00%
Total 199 100.00% 10 100.00%



static long kvm_s390_get_skeys(struct kvm *kvm, struct kvm_s390_skeys *args)
{
	uint8_t *keys;
	uint64_t hva;
	int srcu_idx, 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 = kvmalloc_array(args->count, sizeof(uint8_t), GFP_KERNEL);
	if (!keys)
		return -ENOMEM;

	down_read(&current->mm->mmap_sem);
	srcu_idx = srcu_read_lock(&kvm->srcu);
	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;
	}
	srcu_read_unlock(&kvm->srcu, srcu_idx);
	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 176 68.22% 1 12.50%
Martin Schwidefsky 25 9.69% 1 12.50%
Christian Bornträger 22 8.53% 1 12.50%
Heiko Carstens 15 5.81% 1 12.50%
Carsten Otte 9 3.49% 1 12.50%
David Hildenbrand 8 3.10% 1 12.50%
Cornelia Huck 2 0.78% 1 12.50%
Michal Hocko 1 0.39% 1 12.50%
Total 258 100.00% 8 100.00%



static long kvm_s390_set_skeys(struct kvm *kvm, struct kvm_s390_skeys *args)
{
	uint8_t *keys;
	uint64_t hva;
	int srcu_idx, 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 = kvmalloc_array(args->count, sizeof(uint8_t), GFP_KERNEL);
	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);
	srcu_idx = srcu_read_lock(&kvm->srcu);
	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;
	}
	srcu_read_unlock(&kvm->srcu, srcu_idx);
	up_read(&current->mm->mmap_sem);
out:
	kvfree(keys);
	return r;
}

Contributors
Person Tokens Prop Commits CommitProp
Jason J. Herne 210 76.09% 1 14.29%
Christian Bornträger 22 7.97% 1 14.29%
Martin Schwidefsky 20 7.25% 1 14.29%
Dominik Dingel 16 5.80% 2 28.57%
Tony Krowiak 7 2.54% 1 14.29%
Michal Hocko 1 0.36% 1 14.29%
Total 276 100.00% 7 100.00%

/*
 * Base address and length must be sent at the start of each block, therefore
 * it's cheaper to send some clean data, as long as it's less than the size of
 * two longs.
 */

#define KVM_S390_MAX_BIT_DISTANCE (2 * sizeof(void *))
/* for consistency */

#define KVM_S390_CMMA_SIZE_MAX ((u32)KVM_S390_SKEYS_MAX)

/*
 * This function searches for the next page with dirty CMMA attributes, and
 * saves the attributes in the buffer up to either the end of the buffer or
 * until a block of at least KVM_S390_MAX_BIT_DISTANCE clean bits is found;
 * no trailing clean bytes are saved.
 * In case no dirty bits were found, or if CMMA was not enabled or used, the
 * output buffer will indicate 0 as length.
 */


static int kvm_s390_get_cmma_bits(struct kvm *kvm,
				  struct kvm_s390_cmma_log *args)
{
	struct kvm_s390_migration_state *s = kvm->arch.migration_state;
	unsigned long bufsize, hva, pgstev, i, next, cur;
	int srcu_idx, peek, r = 0, rr;
	u8 *res;

	cur = args->start_gfn;
	i = next = pgstev = 0;

	if (unlikely(!kvm->arch.use_cmma))
		return -ENXIO;
	/* Invalid/unsupported flags were specified */
	if (args->flags & ~KVM_S390_CMMA_PEEK)
		return -EINVAL;
	/* Migration mode query, and we are not doing a migration */
	peek = !!(args->flags & KVM_S390_CMMA_PEEK);
	if (!peek && !s)
		return -EINVAL;
	/* CMMA is disabled or was not used, or the buffer has length zero */
	bufsize = min(args->count, KVM_S390_CMMA_SIZE_MAX);
	if (!bufsize || !kvm->mm->context.use_cmma) {
		memset(args, 0, sizeof(*args));
		return 0;
	}

	if (!peek) {
		/* We are not peeking, and there are no dirty pages */
		if (!atomic64_read(&s->dirty_pages)) {
			memset(args, 0, sizeof(*args));
			return 0;
		}
		cur = find_next_bit(s->pgste_bitmap, s->bitmap_size,
				    args->start_gfn);
		if (cur >= s->bitmap_size)	/* nothing found, loop back */
			cur = find_next_bit(s->pgste_bitmap, s->bitmap_size, 0);
		if (cur >= s->bitmap_size) {	/* again! (very unlikely) */
			memset(args, 0, sizeof(*args));
			return 0;
		}
		next = find_next_bit(s->pgste_bitmap, s->bitmap_size, cur + 1);
	}

	res = vmalloc(bufsize);
	if (!res)
		return -ENOMEM;

	args->start_gfn = cur;

	down_read(&kvm->mm->mmap_sem);
	srcu_idx = srcu_read_lock(&kvm->srcu);
	while (i < bufsize) {
		hva = gfn_to_hva(kvm, cur);
		if (kvm_is_error_hva(hva)) {
			r = -EFAULT;
			break;
		}
		/* decrement only if we actually flipped the bit to 0 */
		if (!peek && test_and_clear_bit(cur, s->pgste_bitmap))
			atomic64_dec(&s->dirty_pages);
		r = get_pgste(kvm->mm, hva, &pgstev);
		if (r < 0)
			pgstev = 0;
		/* save the value */
		res[i++] = (pgstev >> 24) & 0x43;
		/*
                 * if the next bit is too far away, stop.
                 * if we reached the previous "next", find the next one
                 */
		if (!peek) {
			if (next > cur + KVM_S390_MAX_BIT_DISTANCE)
				break;
			if (cur == next)
				next = find_next_bit(s->pgste_bitmap,
						     s->bitmap_size, cur + 1);
		/* reached the end of the bitmap or of the buffer, stop */
			if ((next >= s->bitmap_size) ||
			    (next >= args->start_gfn + bufsize))
				break;
		}
		cur++;
	}
	srcu_read_unlock(&kvm->srcu, srcu_idx);
	up_read(&kvm->mm->mmap_sem);
	args->count = i;
	args->remaining = s ? atomic64_read(&s->dirty_pages) : 0;

	rr = copy_to_user((void __user *)args->values, res, args->count);
	if (rr)
		r = -EFAULT;

	vfree(res);
	return r;
}

Contributors
Person Tokens Prop Commits CommitProp
Claudio Imbrenda 375 65.67% 2 20.00%
Jason J. Herne 105 18.39% 1 10.00%
Cornelia Huck 29 5.08% 2 20.00%
Martin Schwidefsky 18 3.15% 1 10.00%
Heiko Carstens 17 2.98% 1 10.00%
Carsten Otte 15 2.63% 1 10.00%
David Hildenbrand 7 1.23% 1 10.00%
Dominik Dingel 5 0.88% 1 10.00%
Total 571 100.00% 10 100.00%

/*
 * This function sets the CMMA attributes for the given pages. If the input
 * buffer has zero length, no action is taken, otherwise the attributes are
 * set and the mm->context.use_cmma flag is set.
 */


static int kvm_s390_set_cmma_bits(struct kvm *kvm,
				  const struct kvm_s390_cmma_log *args)
{
	unsigned long hva, mask, pgstev, i;
	uint8_t *bits;
	int srcu_idx, r = 0;

	mask = args->mask;

	if (!kvm->arch.use_cmma)
		return -ENXIO;
	/* invalid/unsupported flags */
	if (args->flags != 0)
		return -EINVAL;
	/* Enforce sane limit on memory allocation */
	if (args->count > KVM_S390_CMMA_SIZE_MAX)
		return -EINVAL;
	/* Nothing to do */
	if (args->count == 0)
		return 0;

	bits = vmalloc(sizeof(*bits) * args->count);
	if (!bits)
		return -ENOMEM;

	r = copy_from_user(bits, (void __user *)args->values, args->count);
	if (r) {
		r = -EFAULT;
		goto out;
	}

	down_read(&kvm->mm->mmap_sem);
	srcu_idx = srcu_read_lock(&kvm->srcu);
	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;
		}

		pgstev = bits[i];
		pgstev = pgstev << 24;
		mask &= _PGSTE_GPS_USAGE_MASK | _PGSTE_GPS_NODAT;
		set_pgste_bits(kvm->mm, hva, mask, pgstev);
	}
	srcu_read_unlock(&kvm->srcu, srcu_idx);
	up_read(&kvm->mm->mmap_sem);

	if (!kvm->mm->context.use_cmma) {
		down_write(&kvm->mm->mmap_sem);
		kvm->mm->context.use_cmma = 1;
		up_write(&kvm->mm->mmap_sem);
	}
out:
	vfree(bits);
	return r;
}

Contributors
Person Tokens Prop Commits CommitProp
Jason J. Herne 161 49.85% 1 25.00%
Claudio Imbrenda 144 44.58% 2 50.00%
Martin Schwidefsky 18 5.57% 1 25.00%
Total 323 100.00% 4 100.00%



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;
	}
	case KVM_S390_GET_CMMA_BITS: {
		struct kvm_s390_cmma_log args;

		r = -EFAULT;
		if (copy_from_user(&args, argp, sizeof(args)))
			break;
		mutex_lock(&kvm->slots_lock);
		r = kvm_s390_get_cmma_bits(kvm, &args);
		mutex_unlock(&kvm->slots_lock);
		if (!r) {
			r = copy_to_user(argp, &args, sizeof(args));
			if (r)
				r = -EFAULT;
		}
		break;
	}
	case KVM_S390_SET_CMMA_BITS: {
		struct kvm_s390_cmma_log args;

		r = -EFAULT;
		if (copy_from_user(&args, argp, sizeof(args)))
			break;
		mutex_lock(&kvm->slots_lock);
		r = kvm_s390_set_cmma_bits(kvm, &args);
		mutex_unlock(&kvm->slots_lock);
		break;
	}
	default:
		r = -ENOTTY;
	}

	return r;
}

Contributors
Person Tokens Prop Commits CommitProp
Dominik Dingel 175 31.76% 1 10.00%
Jason J. Herne 96 17.42% 1 10.00%
Cornelia Huck 91 16.52% 2 20.00%
Claudio Imbrenda 57 10.34% 1 10.00%
Heiko Carstens 56 10.16% 1 10.00%
Carsten Otte 41 7.44% 1 10.00%
Christian Bornträger 32 5.81% 1 10.00%
Nicholas Krause 2 0.36% 1 10.00%
Avi Kivity 1 0.18% 1 10.00%
Total 551 100.00% 10 100.00%



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;

	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);

	/* we are always in czam mode - even on pre z14 machines */
	set_kvm_facility(kvm->arch.model.fac_mask, 138);
	set_kvm_facility(kvm->arch.model.fac_list, 138);
	/* we emulate STHYI in kvm */
	set_kvm_facility(kvm->arch.model.fac_mask, 74);
	set_kvm_facility(kvm->arch.model.fac_list, 74);
	if (MACHINE_HAS_TLB_GUEST) {
		set_kvm_facility(kvm->arch.model.fac_mask, 147);
		set_kvm_facility(kvm->arch.model.fac_list, 147);
	}

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

	kvm_s390_crypto_init(kvm);

	mutex_init(&kvm->arch.float_int.ais_lock);
	kvm->arch.float_int.simm = 0;
	kvm->arch.float_int.nimm = 0;
	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_SIZE_MAX;
		else
			kvm->arch.mem_limit = min_t(unsigned long, TASK_SIZE_MAX,
						    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 17.08% 4 8.89%
Carsten Otte 132 15.66% 4 8.89%
Heiko Carstens 132 15.66% 2 4.44%
David Hildenbrand 108 12.81% 8 17.78%
Christian Bornträger 90 10.68% 7 15.56%
Dominik Dingel 34 4.03% 3 6.67%
Fei Li 32 3.80% 1 2.22%
Claudio Imbrenda 32 3.80% 1 2.22%
Janosch Frank 26 3.08% 1 2.22%
Guenther Hutzl 24 2.85% 1 2.22%
Eugene (jno) Dvurechenski 23 2.73% 3 6.67%
Jens Freimann 17 2.02% 1 2.22%
Cornelia Huck 16 1.90% 2 4.44%
Thomas Huth 10 1.19% 1 2.22%
Jason J. Herne 8 0.95% 1 2.22%
Jan Kiszka 7 0.83% 1 2.22%
Tony Krowiak 4 0.47% 1 2.22%
Martin Schwidefsky 4 0.47% 3 6.67%
Total 843 100.00% 45 100.00%



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
Christian Bornträger 47 54.02% 2 50.00%
Gleb Natapov 33 37.93% 1 25.00%
Heiko Carstens 7 8.05% 1 25.00%
Total 87 100.00% 4 100.00%



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);
	if (kvm->arch.migration_state) {
		vfree(kvm->arch.migration_state->pgste_bitmap);
		kfree(kvm->arch.migration_state);
	}
	KVM_EVENT(3, "vm 0x%pK destroyed", kvm);
}

Contributors
Person Tokens Prop Commits CommitProp
Claudio Imbrenda 30 26.55% 1 6.67%
Heiko Carstens 26 23.01% 1 6.67%
Carsten Otte 23 20.35% 3 20.00%
Christian Bornträger 13 11.50% 4 26.67%
David Hildenbrand 11 9.73% 2 13.33%
Tony Krowiak 7 6.19% 1 6.67%
Cornelia Huck 1 0.88% 1 6.67%
Martin Schwidefsky 1 0.88% 1 6.67%
Eugene (jno) Dvurechenski 1 0.88% 1 6.67%
Total 113 100.00% 15 100.00%

/* 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 28 50.91% 3 30.00%
Christian Bornträger 12 21.82% 1 10.00%
Heiko Carstens 7 12.73% 1 10.00%
Dominik Dingel 4 7.27% 3 30.00%
Martin Schwidefsky 4 7.27% 2 20.00%
Total 55 100.00% 10 100.00%



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 |= ECB2_ESCA;
		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 50.00%
David Hildenbrand 92 30.87% 4 50.00%
Total 298 100.00% 8 100.00%

/* 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 |= ECB2_ESCA;
	}
	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 216 99.08% 2 50.00%
Christian Bornträger 1 0.46% 1 25.00%
David Hildenbrand 1 0.46% 1 25.00%
Total 218 100.00% 4 100.00%



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;
	if (test_kvm_facility(vcpu->kvm, 82))
		vcpu->run->kvm_valid_regs |= KVM_SYNC_BPBC;
	if (test_kvm_facility(vcpu->kvm, 133))
		vcpu->run->kvm_valid_regs |= KVM_SYNC_GSCB;
	/* 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
Fan Zhang 32 22.07% 2 12.50%
Christian Bornträger 31 21.38% 5 31.25%
Dominik Dingel 30 20.69% 1 6.25%
Eric Farman 17 11.72% 1 6.25%
David Hildenbrand 15 10.34% 3 18.75%
Julius Niedworok 7 4.83% 1 6.25%
Heiko Carstens 6 4.14% 1 6.25%
Cornelia Huck 4 2.76% 1 6.25%
Carsten Otte 3 2.07% 1 6.25%
Total 145 100.00% 16 100.00%

/* 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 45.45%
Carsten Otte 11 18.03% 2 18.18%
Cornelia Huck 7 11.48% 1 9.09%
Heiko Carstens 6 9.84% 1 9.09%
Christian Bornträger 4 6.56% 1 9.09%
Peter Zijlstra 1 1.64% 1 9.09%
Total 61 100.00% 11 100.00%



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 40.00%
Carsten Otte 11 16.18% 1 10.00%
Heiko Carstens 9 13.24% 1 10.00%
Cornelia Huck 9 13.24% 1 10.00%
Christian Bornträger 2 2.94% 2 20.00%
Peter Zijlstra 1 1.47% 1 10.00%
Total 68 100.00% 10 100.00%



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.sie_block->fpf &= ~FPF_BPBC;
	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 99 51.03% 1 7.69%
Christian Bornträger 41 21.13% 5 38.46%
David Hildenbrand 23 11.86% 4 30.77%
Gleb Natapov 16 8.25% 1 7.69%
Dominik Dingel 13 6.70% 1 7.69%
Jens Freimann 2 1.03% 1 7.69%
Total 194 100.00% 13 100.00%



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 33.33%
Jason J. Herne 36 28.80% 1 11.11%
Dominik Dingel 27 21.60% 2 22.22%
Fan Zhang 6 4.80% 1 11.11%
Sheng Yang 4 3.20% 1 11.11%
Marcelo Tosatti 3 2.40% 1 11.11%
Total 125 100.00% 9 100.00%



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
Heiko Carstens 14 45.16% 1 20.00%
Dominik Dingel 12 38.71% 1 20.00%
Carsten Otte 3 9.68% 1 20.00%
Cornelia Huck 1 3.23% 1 20.00%
Christian Bornträger 1 3.23% 1 20.00%
Total 31 100.00% 5 100.00%



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 &= ~ECB2_PFMFI;
	return 0;
}

Contributors
Person Tokens Prop Commits CommitProp
Carsten Otte 17 32.69% 1 14.29%
Dominik Dingel 16 30.77% 2 28.57%
Heiko Carstens 12 23.08% 1 14.29%
Christian Bornträger 6 11.54% 2 28.57%
David Hildenbrand 1 1.92% 1 14.29%
Total 52 100.00% 7 100.00%



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 |= ECB_HOSTPROTINT;
	if (test_kvm_facility(vcpu->kvm, 9))
		vcpu->arch.sie_block->ecb |= ECB_SRSI;
	if (test_kvm_facility(vcpu->kvm, 73))
		vcpu->arch.sie_block->ecb |= ECB_TE;

	if (test_kvm_facility(vcpu->kvm, 8) && sclp.has_pfmfi)
		vcpu->arch.sie_block->ecb2 |= ECB2_PFMFI;
	if (test_kvm_facility(vcpu->kvm, 130))
		vcpu->arch.sie_block->ecb2 |= ECB2_IEP;
	vcpu->arch.sie_block->eca = ECA_MVPGI | ECA_PROTEXCI;
	if (sclp.has_cei)
		vcpu->arch.sie_block->eca |= ECA_CEI;
	if (sclp.has_ib)
		vcpu->arch.sie_block->eca |= ECA_IB;
	if (sclp.has_siif)
		vcpu->arch.sie_block->eca |= ECA_SII;
	if (sclp.has_sigpif)
		vcpu->arch.sie_block->eca |= ECA_SIGPI;
	if (test_kvm_facility(vcpu->kvm, 129)) {
		vcpu->arch.sie_block->eca |= ECA_VX;
		vcpu->arch.sie_block->ecd |= ECD_HOSTREGMGMT;
	}
	if (test_kvm_facility(vcpu->kvm, 139))
		vcpu->arch.sie_block->ecd |= ECD_MEF;

	vcpu->arch.sie_block->sdnxo = ((unsigned long) &vcpu->run->s.regs.sdnx)
					| SDNXC;
	vcpu->arch.sie_block->riccbd = (unsigned long) &vcpu->run->s.regs.riccb;

	if (sclp.has_kss)
		atomic_or(CPUSTAT_KSS, &vcpu->arch.sie_block->cpuflags);
	else
		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 106 22.80% 10 26.32%
Heiko Carstens 64 13.76% 2 5.26%
Fan Zhang 50 10.75% 2 5.26%
Guenther Hutzl 48 10.32% 2 5.26%
Michael Müller 30 6.45% 4 10.53%
Dominik Dingel 28 6.02% 3 7.89%
Eric Farman 26 5.59% 1 2.63%
Farhan Ali 21 4.52% 1 2.63%
Collin L. Walling 21 4.52% 1 2.63%
Janosch Frank 20 4.30% 1 2.63%
Christian Bornträger 19 4.09% 4 10.53%
Konstantin Weitz 11 2.37% 1 2.63%
Martin Schwidefsky 8 1.72% 1 2.63%
Tony Krowiak 5 1.08% 1 2.63%
Carsten Otte 4 0.86% 2 5.26%
Peter Zijlstra 2 0.43% 1 2.63%
Cornelia Huck 2 0.43% 1 2.63%
Total 465 100.00% 38 100.00%



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;

	BUILD_BUG_ON(sizeof(struct sie_page) != 4096);
	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 116 36.36% 1 4.17%
Carsten Otte 47 14.73% 2 8.33%
David Hildenbrand 40 12.54% 4 16.67%
Michael Müller 31 9.72% 2 8.33%
Christian Bornträger 28 8.78% 7 29.17%
Cornelia Huck 11 3.45% 2 8.33%
QingFeng Hao 11 3.45% 1 4.17%
Martin Schwidefsky 10 3.13% 1 4.17%
Wei Yongjun 9 2.82% 1 4.17%
Dominik Dingel 6 1.88% 1 4.17%
Eugene (jno) Dvurechenski 6 1.88% 1 4.17%
Jens Freimann 4 1.25% 1 4.17%
Total 319 100.00% 24 100.00%



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

Contributors
Person Tokens Prop Commits CommitProp
Marcelo Tosatti 11 61.11% 1 25.00%
Michael Müller 3 16.67% 1 25.00%
David Hildenbrand 3 16.67% 1 25.00%
Heiko Carstens 1 5.56% 1 25.00%
Total 18 100.00% 4 100.00%



bool kvm_arch_vcpu_in_kernel(struct kvm_vcpu *vcpu)
{
	return !(vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE);
}

Contributors
Person Tokens Prop Commits CommitProp
Longpeng( Mike) 26 100.00% 2 100.00%
Total 26 100.00% 2 100.00%



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
Heiko Carstens 17 58.62% 1 20.00%
Christian Bornträger 6 20.69% 2 40.00%
David Hildenbrand 5 17.24% 1 20.00%
Peter Zijlstra 1 3.45% 1 20.00%
Total 29 100.00% 5 100.00%



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 14 58.33% 2 40.00%
Michael Müller 8 33.33% 1 20.00%
Heiko Carstens 1 4.17% 1 20.00%
Peter Zijlstra 1 4.17% 1 20.00%
Total 24 100.00% 5 100.00%



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 34 87.18% 3 50.00%
Konstantin Weitz 2 5.13% 1 16.67%
Heiko Carstens 2 5.13% 1 16.67%
Peter Zijlstra 1 2.56% 1 16.67%
Total 39 100.00% 6 100.00%

/* 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 20 80.00% 2 66.67%
Konstantin Weitz 5 20.00% 1 33.33%
Total 25 100.00% 3 100.00%



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 50 43.86% 3 37.50%
Martin Schwidefsky 44 38.60% 1 12.50%
David Hildenbrand 8 7.02% 1 12.50%
Carsten Otte 7 6.14% 1 12.50%
Konstantin Weitz 3 2.63% 1 12.50%
Michael Müller 2 1.75% 1 12.50%
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
Christoffer Dall 9 52.94% 1 33.33%
Heiko Carstens 6 35.29% 1 33.33%
Christian Bornträger 2 11.76% 1 33.33%
Total 17 100.00% 3 100.00%



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
Carsten Otte 65 25.00% 4 33.33%
Heiko Carstens 59 22.69% 1 8.33%
Dominik Dingel 55 21.15% 1 8.33%
Christian Bornträger 35 13.46% 3 25.00%
Jason J. Herne 34 13.08% 1 8.33%
Michael Müller 9 3.46% 1 8.33%
David Hildenbrand 3 1.15% 1 8.33%
Total 260 100.00% 12 100.00%



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);
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 4.15 arch/s390/kvm/kvm-s390.c

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