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KVM: move DR register access handling into generic code

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Currently both SVM and VMX have their own DR handling code. Move it to
x86.c.

Acked-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Gleb Natapov <gleb@redhat.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
This commit is contained in:
Gleb Natapov
2010-04-13 10:05:23 +03:00
committed by Avi Kivity
parent 6bc31bdc55
commit 020df0794f
4 changed files with 93 additions and 134 deletions
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78
arch/x86/kvm/x86.c
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@ -562,6 +562,80 @@ unsigned long kvm_get_cr8(struct kvm_vcpu *vcpu)
}
EXPORT_SYMBOL_GPL(kvm_get_cr8);
int kvm_set_dr(struct kvm_vcpu *vcpu, int dr, unsigned long val)
{
switch (dr) {
case 0 ... 3:
vcpu->arch.db[dr] = val;
if (!(vcpu->guest_debug & KVM_GUESTDBG_USE_HW_BP))
vcpu->arch.eff_db[dr] = val;
break;
case 4:
if (kvm_read_cr4_bits(vcpu, X86_CR4_DE)) {
kvm_queue_exception(vcpu, UD_VECTOR);
return 1;
}
/* fall through */
case 6:
if (val & 0xffffffff00000000ULL) {
kvm_inject_gp(vcpu, 0);
return 1;
}
vcpu->arch.dr6 = (val & DR6_VOLATILE) | DR6_FIXED_1;
break;
case 5:
if (kvm_read_cr4_bits(vcpu, X86_CR4_DE)) {
kvm_queue_exception(vcpu, UD_VECTOR);
return 1;
}
/* fall through */
default: /* 7 */
if (val & 0xffffffff00000000ULL) {
kvm_inject_gp(vcpu, 0);
return 1;
}
vcpu->arch.dr7 = (val & DR7_VOLATILE) | DR7_FIXED_1;
if (!(vcpu->guest_debug & KVM_GUESTDBG_USE_HW_BP)) {
kvm_x86_ops->set_dr7(vcpu, vcpu->arch.dr7);
vcpu->arch.switch_db_regs = (val & DR7_BP_EN_MASK);
}
break;
}
return 0;
}
EXPORT_SYMBOL_GPL(kvm_set_dr);
int kvm_get_dr(struct kvm_vcpu *vcpu, int dr, unsigned long *val)
{
switch (dr) {
case 0 ... 3:
*val = vcpu->arch.db[dr];
break;
case 4:
if (kvm_read_cr4_bits(vcpu, X86_CR4_DE)) {
kvm_queue_exception(vcpu, UD_VECTOR);
return 1;
}
/* fall through */
case 6:
*val = vcpu->arch.dr6;
break;
case 5:
if (kvm_read_cr4_bits(vcpu, X86_CR4_DE)) {
kvm_queue_exception(vcpu, UD_VECTOR);
return 1;
}
/* fall through */
default: /* 7 */
*val = vcpu->arch.dr7;
break;
}
return 0;
}
EXPORT_SYMBOL_GPL(kvm_get_dr);
static inline u32 bit(int bitno)
{
return 1 << (bitno & 31);
@ -3483,14 +3557,14 @@ int emulate_clts(struct kvm_vcpu *vcpu)
int emulator_get_dr(struct x86_emulate_ctxt *ctxt, int dr, unsigned long *dest)
{
return kvm_x86_ops->get_dr(ctxt->vcpu, dr, dest);
return kvm_get_dr(ctxt->vcpu, dr, dest);
}
int emulator_set_dr(struct x86_emulate_ctxt *ctxt, int dr, unsigned long value)
{
unsigned long mask = (ctxt->mode == X86EMUL_MODE_PROT64) ? ~0ULL : ~0U;
return kvm_x86_ops->set_dr(ctxt->vcpu, dr, value & mask);
return kvm_set_dr(ctxt->vcpu, dr, value & mask);
}
void kvm_report_emulation_failure(struct kvm_vcpu *vcpu, const char *context)