262 lines
6.4 KiB
C
262 lines
6.4 KiB
C
/*
|
|
* 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 <asm/uaccess.h>
|
|
#include <asm/kvm.h>
|
|
#include <asm/kvm_asm.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[] = {
|
|
{ NULL }
|
|
};
|
|
|
|
int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static u64 core_reg_offset_from_id(u64 id)
|
|
{
|
|
return id & ~(KVM_REG_ARCH_MASK | KVM_REG_SIZE_MASK | KVM_REG_ARM_CORE);
|
|
}
|
|
|
|
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.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);
|
|
}
|
|
|
|
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.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;
|
|
}
|
|
|
|
int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs)
|
|
{
|
|
return -EINVAL;
|
|
}
|
|
|
|
int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs)
|
|
{
|
|
return -EINVAL;
|
|
}
|
|
|
|
static unsigned long num_core_regs(void)
|
|
{
|
|
return sizeof(struct kvm_regs) / sizeof(u32);
|
|
}
|
|
|
|
/**
|
|
* 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);
|
|
}
|
|
|
|
/**
|
|
* kvm_arm_copy_reg_indices - get indices of all registers.
|
|
*
|
|
* We do core registers right here, then we apppend 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;
|
|
|
|
for (i = 0; i < sizeof(struct kvm_regs)/sizeof(u32); i++) {
|
|
if (put_user(core_reg | i, uindices))
|
|
return -EFAULT;
|
|
uindices++;
|
|
}
|
|
|
|
return kvm_arm_copy_coproc_indices(vcpu, uindices);
|
|
}
|
|
|
|
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);
|
|
|
|
return kvm_arm_coproc_get_reg(vcpu, reg);
|
|
}
|
|
|
|
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);
|
|
|
|
return kvm_arm_coproc_set_reg(vcpu, reg);
|
|
}
|
|
|
|
int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu,
|
|
struct kvm_sregs *sregs)
|
|
{
|
|
return -EINVAL;
|
|
}
|
|
|
|
int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu,
|
|
struct kvm_sregs *sregs)
|
|
{
|
|
return -EINVAL;
|
|
}
|
|
|
|
int __attribute_const__ kvm_target_cpu(void)
|
|
{
|
|
unsigned long implementor = read_cpuid_implementor();
|
|
unsigned long part_number = read_cpuid_part_number();
|
|
|
|
if (implementor != ARM_CPU_IMP_ARM)
|
|
return -EINVAL;
|
|
|
|
switch (part_number) {
|
|
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;
|
|
}
|
|
}
|
|
|
|
int kvm_vcpu_set_target(struct kvm_vcpu *vcpu,
|
|
const struct kvm_vcpu_init *init)
|
|
{
|
|
unsigned int i;
|
|
|
|
/* We can only cope with guest==host and only on A15/A7 (for now). */
|
|
if (init->target != kvm_target_cpu())
|
|
return -EINVAL;
|
|
|
|
vcpu->arch.target = init->target;
|
|
bitmap_zero(vcpu->arch.features, KVM_VCPU_MAX_FEATURES);
|
|
|
|
/* -ENOENT for unknown features, -EINVAL for invalid combinations. */
|
|
for (i = 0; i < sizeof(init->features) * 8; i++) {
|
|
if (test_bit(i, (void *)init->features)) {
|
|
if (i >= KVM_VCPU_MAX_FEATURES)
|
|
return -ENOENT;
|
|
set_bit(i, vcpu->arch.features);
|
|
}
|
|
}
|
|
|
|
/* Now we know what it is, we can reset it. */
|
|
return kvm_reset_vcpu(vcpu);
|
|
}
|
|
|
|
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;
|
|
}
|
|
|
|
int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu)
|
|
{
|
|
return -EINVAL;
|
|
}
|
|
|
|
int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu)
|
|
{
|
|
return -EINVAL;
|
|
}
|
|
|
|
int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu,
|
|
struct kvm_translation *tr)
|
|
{
|
|
return -EINVAL;
|
|
}
|