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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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66
arch/x86/kvm/svm.c
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@@ -1307,70 +1307,11 @@ static void new_asid(struct vcpu_svm *svm, struct svm_cpu_data *sd)
svm->vmcb->control.asid = sd->next_asid++;
}
static int svm_get_dr(struct kvm_vcpu *vcpu, int dr, unsigned long *dest)
static void svm_set_dr7(struct kvm_vcpu *vcpu, unsigned long value)
{
struct vcpu_svm *svm = to_svm(vcpu);
switch (dr) {
case 0 ... 3:
*dest = vcpu->arch.db[dr];
break;
case 4:
if (kvm_read_cr4_bits(vcpu, X86_CR4_DE))
return EMULATE_FAIL; /* will re-inject UD */
/* fall through */
case 6:
if (vcpu->guest_debug & KVM_GUESTDBG_USE_HW_BP)
*dest = vcpu->arch.dr6;
else
*dest = svm->vmcb->save.dr6;
break;
case 5:
if (kvm_read_cr4_bits(vcpu, X86_CR4_DE))
return EMULATE_FAIL; /* will re-inject UD */
/* fall through */
case 7:
if (vcpu->guest_debug & KVM_GUESTDBG_USE_HW_BP)
*dest = vcpu->arch.dr7;
else
*dest = svm->vmcb->save.dr7;
break;
}
return EMULATE_DONE;
}
static int svm_set_dr(struct kvm_vcpu *vcpu, int dr, unsigned long value)
{
struct vcpu_svm *svm = to_svm(vcpu);
switch (dr) {
case 0 ... 3:
vcpu->arch.db[dr] = value;
if (!(vcpu->guest_debug & KVM_GUESTDBG_USE_HW_BP))
vcpu->arch.eff_db[dr] = value;
break;
case 4:
if (kvm_read_cr4_bits(vcpu, X86_CR4_DE))
return EMULATE_FAIL; /* will re-inject UD */
/* fall through */
case 6:
vcpu->arch.dr6 = (value & DR6_VOLATILE) | DR6_FIXED_1;
break;
case 5:
if (kvm_read_cr4_bits(vcpu, X86_CR4_DE))
return EMULATE_FAIL; /* will re-inject UD */
/* fall through */
case 7:
vcpu->arch.dr7 = (value & DR7_VOLATILE) | DR7_FIXED_1;
if (!(vcpu->guest_debug & KVM_GUESTDBG_USE_HW_BP)) {
svm->vmcb->save.dr7 = vcpu->arch.dr7;
vcpu->arch.switch_db_regs = (value & DR7_BP_EN_MASK);
}
break;
}
return EMULATE_DONE;
svm->vmcb->save.dr7 = value;
}
static int pf_interception(struct vcpu_svm *svm)
@@ -3302,8 +3243,7 @@ static struct kvm_x86_ops svm_x86_ops = {
.set_idt = svm_set_idt,
.get_gdt = svm_get_gdt,
.set_gdt = svm_set_gdt,
.get_dr = svm_get_dr,
.set_dr = svm_set_dr,
.set_dr7 = svm_set_dr7,
.cache_reg = svm_cache_reg,
.get_rflags = svm_get_rflags,
.set_rflags = svm_set_rflags,