Release 4.11 arch/arm/kvm/guest.c

Directory: arch/arm/kvm
/*
 * Copyright (C) 2012 - Virtual Open Systems and Columbia University
 * Author: Christoffer Dall <c.dall@virtualopensystems.com>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License, version 2, as
 * published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
 */

#include <linux/errno.h>
#include <linux/err.h>
#include <linux/kvm_host.h>
#include <linux/module.h>
#include <linux/vmalloc.h>
#include <linux/fs.h>
#include <asm/cputype.h>
#include <linux/uaccess.h>
#include <asm/kvm.h>
#include <asm/kvm_emulate.h>
#include <asm/kvm_coproc.h>


#define VM_STAT(x) { #x, offsetof(struct kvm, stat.x), KVM_STAT_VM }

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


struct kvm_stats_debugfs_item debugfs_entries[] = {
	VCPU_STAT(hvc_exit_stat),
	VCPU_STAT(wfe_exit_stat),
	VCPU_STAT(wfi_exit_stat),
	VCPU_STAT(mmio_exit_user),
	VCPU_STAT(mmio_exit_kernel),
	VCPU_STAT(exits),
	{ NULL }
};



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

Contributors
Person Tokens Prop Commits CommitProp
Christoffer Dall 13 100.00% 1 100.00%
Total 13 100.00% 1 100.00%



static u64 core_reg_offset_from_id(u64 id)
{
	return id & ~(KVM_REG_ARCH_MASK | KVM_REG_SIZE_MASK | KVM_REG_ARM_CORE);
}

Contributors
Person Tokens Prop Commits CommitProp
Christoffer Dall 21 100.00% 1 100.00%
Total 21 100.00% 1 100.00%



static int get_core_reg(struct kvm_vcpu *vcpu, const struct kvm_one_reg *reg)
{
	u32 __user *uaddr = (u32 __user *)(long)reg->addr;
	struct kvm_regs *regs = &vcpu->arch.ctxt.gp_regs;
	u64 off;

	if (KVM_REG_SIZE(reg->id) != 4)
		return -ENOENT;

	/* Our ID is an index into the kvm_regs struct. */
	off = core_reg_offset_from_id(reg->id);
	if (off >= sizeof(*regs) / KVM_REG_SIZE(reg->id))
		return -ENOENT;

	return put_user(((u32 *)regs)[off], uaddr);
}

Contributors
Person Tokens Prop Commits CommitProp
Christoffer Dall 111 97.37% 1 50.00%
Marc Zyngier 3 2.63% 1 50.00%
Total 114 100.00% 2 100.00%



static int set_core_reg(struct kvm_vcpu *vcpu, const struct kvm_one_reg *reg)
{
	u32 __user *uaddr = (u32 __user *)(long)reg->addr;
	struct kvm_regs *regs = &vcpu->arch.ctxt.gp_regs;
	u64 off, val;

	if (KVM_REG_SIZE(reg->id) != 4)
		return -ENOENT;

	/* Our ID is an index into the kvm_regs struct. */
	off = core_reg_offset_from_id(reg->id);
	if (off >= sizeof(*regs) / KVM_REG_SIZE(reg->id))
		return -ENOENT;

	if (get_user(val, uaddr) != 0)
		return -EFAULT;

	if (off == KVM_REG_ARM_CORE_REG(usr_regs.ARM_cpsr)) {
		unsigned long mode = val & MODE_MASK;
		switch (mode) {
		case USR_MODE:
		case FIQ_MODE:
		case IRQ_MODE:
		case SVC_MODE:
		case ABT_MODE:
		case UND_MODE:
			break;
		default:
			return -EINVAL;
		}
	}

	((u32 *)regs)[off] = val;
	return 0;
}

Contributors
Person Tokens Prop Commits CommitProp
Christoffer Dall 178 98.34% 1 50.00%
Marc Zyngier 3 1.66% 1 50.00%
Total 181 100.00% 2 100.00%



int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs)
{
	return -EINVAL;
}

Contributors
Person Tokens Prop Commits CommitProp
Christoffer Dall 19 100.00% 1 100.00%
Total 19 100.00% 1 100.00%



int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs)
{
	return -EINVAL;
}

Contributors
Person Tokens Prop Commits CommitProp
Christoffer Dall 19 100.00% 1 100.00%
Total 19 100.00% 1 100.00%


#define NUM_TIMER_REGS 3



static bool is_timer_reg(u64 index)
{
	switch (index) {
	case KVM_REG_ARM_TIMER_CTL:
	case KVM_REG_ARM_TIMER_CNT:
	case KVM_REG_ARM_TIMER_CVAL:
		return true;
	}
	return false;
}

Contributors
Person Tokens Prop Commits CommitProp
Andre Przywara 30 100.00% 1 100.00%
Total 30 100.00% 1 100.00%



static int copy_timer_indices(struct kvm_vcpu *vcpu, u64 __user *uindices)
{
	if (put_user(KVM_REG_ARM_TIMER_CTL, uindices))
		return -EFAULT;
	uindices++;
	if (put_user(KVM_REG_ARM_TIMER_CNT, uindices))
		return -EFAULT;
	uindices++;
	if (put_user(KVM_REG_ARM_TIMER_CVAL, uindices))
		return -EFAULT;

	return 0;
}

Contributors
Person Tokens Prop Commits CommitProp
Andre Przywara 64 100.00% 1 100.00%
Total 64 100.00% 1 100.00%



static int set_timer_reg(struct kvm_vcpu *vcpu, const struct kvm_one_reg *reg)
{
	void __user *uaddr = (void __user *)(long)reg->addr;
	u64 val;
	int ret;

	ret = copy_from_user(&val, uaddr, KVM_REG_SIZE(reg->id));
	if (ret != 0)
		return -EFAULT;

	return kvm_arm_timer_set_reg(vcpu, reg->id, val);
}

Contributors
Person Tokens Prop Commits CommitProp
Andre Przywara 77 97.47% 1 50.00%
Will Deacon 2 2.53% 1 50.00%
Total 79 100.00% 2 100.00%



static int get_timer_reg(struct kvm_vcpu *vcpu, const struct kvm_one_reg *reg)
{
	void __user *uaddr = (void __user *)(long)reg->addr;
	u64 val;

	val = kvm_arm_timer_get_reg(vcpu, reg->id);
	return copy_to_user(uaddr, &val, KVM_REG_SIZE(reg->id)) ? -EFAULT : 0;
}

Contributors
Person Tokens Prop Commits CommitProp
Andre Przywara 64 92.75% 1 50.00%
Michael S. Tsirkin 5 7.25% 1 50.00%
Total 69 100.00% 2 100.00%



static unsigned long num_core_regs(void)
{
	return sizeof(struct kvm_regs) / sizeof(u32);
}

Contributors
Person Tokens Prop Commits CommitProp
Christoffer Dall 21 100.00% 1 100.00%
Total 21 100.00% 1 100.00%

/**
 * kvm_arm_num_regs - how many registers do we present via KVM_GET_ONE_REG
 *
 * This is for all registers.
 */


unsigned long kvm_arm_num_regs(struct kvm_vcpu *vcpu)
{
	return num_core_regs() + kvm_arm_num_coproc_regs(vcpu)
		+ NUM_TIMER_REGS;
}

Contributors
Person Tokens Prop Commits CommitProp
Christoffer Dall 20 90.91% 2 66.67%
Andre Przywara 2 9.09% 1 33.33%
Total 22 100.00% 3 100.00%

/**
 * kvm_arm_copy_reg_indices - get indices of all registers.
 *
 * We do core registers right here, then we append coproc regs.
 */


int kvm_arm_copy_reg_indices(struct kvm_vcpu *vcpu, u64 __user *uindices)
{
	unsigned int i;
	const u64 core_reg = KVM_REG_ARM | KVM_REG_SIZE_U32 | KVM_REG_ARM_CORE;
	int ret;

	for (i = 0; i < sizeof(struct kvm_regs)/sizeof(u32); i++) {
		if (put_user(core_reg | i, uindices))
			return -EFAULT;
		uindices++;
	}

	ret = copy_timer_indices(vcpu, uindices);
	if (ret)
		return ret;
	uindices += NUM_TIMER_REGS;

	return kvm_arm_copy_coproc_indices(vcpu, uindices);
}

Contributors
Person Tokens Prop Commits CommitProp
Christoffer Dall 79 77.45% 2 66.67%
Andre Przywara 23 22.55% 1 33.33%
Total 102 100.00% 3 100.00%



int kvm_arm_get_reg(struct kvm_vcpu *vcpu, const struct kvm_one_reg *reg)
{
	/* We currently use nothing arch-specific in upper 32 bits */
	if ((reg->id & ~KVM_REG_SIZE_MASK) >> 32 != KVM_REG_ARM >> 32)
		return -EINVAL;

	/* Register group 16 means we want a core register. */
	if ((reg->id & KVM_REG_ARM_COPROC_MASK) == KVM_REG_ARM_CORE)
		return get_core_reg(vcpu, reg);

	if (is_timer_reg(reg->id))
		return get_timer_reg(vcpu, reg);

	return kvm_arm_coproc_get_reg(vcpu, reg);
}

Contributors
Person Tokens Prop Commits CommitProp
Christoffer Dall 67 79.76% 2 66.67%
Andre Przywara 17 20.24% 1 33.33%
Total 84 100.00% 3 100.00%



int kvm_arm_set_reg(struct kvm_vcpu *vcpu, const struct kvm_one_reg *reg)
{
	/* We currently use nothing arch-specific in upper 32 bits */
	if ((reg->id & ~KVM_REG_SIZE_MASK) >> 32 != KVM_REG_ARM >> 32)
		return -EINVAL;

	/* Register group 16 means we set a core register. */
	if ((reg->id & KVM_REG_ARM_COPROC_MASK) == KVM_REG_ARM_CORE)
		return set_core_reg(vcpu, reg);

	if (is_timer_reg(reg->id))
		return set_timer_reg(vcpu, reg);

	return kvm_arm_coproc_set_reg(vcpu, reg);
}

Contributors
Person Tokens Prop Commits CommitProp
Christoffer Dall 67 79.76% 2 66.67%
Andre Przywara 17 20.24% 1 33.33%
Total 84 100.00% 3 100.00%



int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu,
				  struct kvm_sregs *sregs)
{
	return -EINVAL;
}

Contributors
Person Tokens Prop Commits CommitProp
Christoffer Dall 19 100.00% 1 100.00%
Total 19 100.00% 1 100.00%



int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu,
				  struct kvm_sregs *sregs)
{
	return -EINVAL;
}

Contributors
Person Tokens Prop Commits CommitProp
Christoffer Dall 19 100.00% 1 100.00%
Total 19 100.00% 1 100.00%



int __attribute_const__ kvm_target_cpu(void)
{
	switch (read_cpuid_part()) {
	case ARM_CPU_PART_CORTEX_A7:
		return KVM_ARM_TARGET_CORTEX_A7;
	case ARM_CPU_PART_CORTEX_A15:
		return KVM_ARM_TARGET_CORTEX_A15;
	default:
		return -EINVAL;
	}
}

Contributors
Person Tokens Prop Commits CommitProp
Marc Zyngier 24 75.00% 1 33.33%
Jonathan Austin 6 18.75% 1 33.33%
Russell King 2 6.25% 1 33.33%
Total 32 100.00% 3 100.00%



int kvm_vcpu_preferred_target(struct kvm_vcpu_init *init)
{
	int target = kvm_target_cpu();

	if (target < 0)
		return -ENODEV;

	memset(init, 0, sizeof(*init));

	/*
         * For now, we don't return any features.
         * In future, we might use features to return target
         * specific features available for the preferred
         * target type.
         */
	init->target = (__u32)target;

	return 0;
}

Contributors
Person Tokens Prop Commits CommitProp
Anup Patel 52 100.00% 1 100.00%
Total 52 100.00% 1 100.00%



int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu)
{
	return -EINVAL;
}

Contributors
Person Tokens Prop Commits CommitProp
Christoffer Dall 19 100.00% 1 100.00%
Total 19 100.00% 1 100.00%



int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu)
{
	return -EINVAL;
}

Contributors
Person Tokens Prop Commits CommitProp
Christoffer Dall 19 100.00% 1 100.00%
Total 19 100.00% 1 100.00%



int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu,
				  struct kvm_translation *tr)
{
	return -EINVAL;
}

Contributors
Person Tokens Prop Commits CommitProp
Christoffer Dall 19 100.00% 1 100.00%
Total 19 100.00% 1 100.00%



int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu,
					struct kvm_guest_debug *dbg)
{
	return -EINVAL;
}
Contributors
Person Tokens Prop Commits CommitProp
Alex Bennée 19 100.00% 1 100.00%
Total 19 100.00% 1 100.00%

Overall Contributors
Person Tokens Prop Commits CommitProp
Christoffer Dall 766 63.05% 2 14.29%
Andre Przywara 298 24.53% 1 7.14%
Anup Patel 52 4.28% 1 7.14%
Marc Zyngier 33 2.72% 2 14.29%
Amit Tomar 30 2.47% 1 7.14%
Alex Bennée 19 1.56% 1 7.14%
Jonathan Austin 6 0.49% 1 7.14%
Michael S. Tsirkin 5 0.41% 1 7.14%
Will Deacon 2 0.16% 1 7.14%
Russell King 2 0.16% 1 7.14%
Andrea Gelmini 1 0.08% 1 7.14%
Linus Torvalds 1 0.08% 1 7.14%
Total 1215 100.00% 14 100.00%
Directory: arch/arm/kvm

Information contained on this website is for historical information purposes only and does not indicate or represent copyright ownership.
Created with cregit.
Person	Tokens	Prop	Commits	CommitProp
Christoffer Dall	13	100.00%	1	100.00%
Total	13	100.00%	1	100.00%
cregit-Linux how code gets into the kernel

Release 4.11 arch/arm/kvm/guest.c

Contributors

Contributors

Contributors

Contributors

Contributors

Contributors

Contributors

Contributors

Contributors

Contributors

Contributors

Contributors

Contributors

Contributors

Contributors

Contributors

Contributors

Contributors

Contributors

Contributors

Contributors

Contributors

Contributors

Overall Contributors
