summaryrefslogtreecommitdiff
path: root/arch/x86/kvm/svm.c
diff options
context:
space:
mode:
Diffstat (limited to 'arch/x86/kvm/svm.c')
-rw-r--r--arch/x86/kvm/svm.c24
1 files changed, 17 insertions, 7 deletions
diff --git a/arch/x86/kvm/svm.c b/arch/x86/kvm/svm.c
index 7527cefc5a43..41dd0387cccb 100644
--- a/arch/x86/kvm/svm.c
+++ b/arch/x86/kvm/svm.c
@@ -1056,9 +1056,11 @@ static void svm_adjust_tsc_offset(struct kvm_vcpu *vcpu, s64 adjustment, bool ho
{
struct vcpu_svm *svm = to_svm(vcpu);
- WARN_ON(adjustment < 0);
- if (host)
- adjustment = svm_scale_tsc(vcpu, adjustment);
+ if (host) {
+ if (svm->tsc_ratio != TSC_RATIO_DEFAULT)
+ WARN_ON(adjustment < 0);
+ adjustment = svm_scale_tsc(vcpu, (u64)adjustment);
+ }
svm->vmcb->control.tsc_offset += adjustment;
if (is_guest_mode(vcpu))
@@ -2999,7 +3001,6 @@ static int dr_interception(struct vcpu_svm *svm)
{
int reg, dr;
unsigned long val;
- int err;
if (svm->vcpu.guest_debug == 0) {
/*
@@ -3019,12 +3020,15 @@ static int dr_interception(struct vcpu_svm *svm)
dr = svm->vmcb->control.exit_code - SVM_EXIT_READ_DR0;
if (dr >= 16) { /* mov to DRn */
+ if (!kvm_require_dr(&svm->vcpu, dr - 16))
+ return 1;
val = kvm_register_read(&svm->vcpu, reg);
kvm_set_dr(&svm->vcpu, dr - 16, val);
} else {
- err = kvm_get_dr(&svm->vcpu, dr, &val);
- if (!err)
- kvm_register_write(&svm->vcpu, reg, val);
+ if (!kvm_require_dr(&svm->vcpu, dr))
+ return 1;
+ kvm_get_dr(&svm->vcpu, dr, &val);
+ kvm_register_write(&svm->vcpu, reg, val);
}
skip_emulated_instruction(&svm->vcpu);
@@ -4123,6 +4127,11 @@ static bool svm_mpx_supported(void)
return false;
}
+static bool svm_xsaves_supported(void)
+{
+ return false;
+}
+
static bool svm_has_wbinvd_exit(void)
{
return true;
@@ -4410,6 +4419,7 @@ static struct kvm_x86_ops svm_x86_ops = {
.rdtscp_supported = svm_rdtscp_supported,
.invpcid_supported = svm_invpcid_supported,
.mpx_supported = svm_mpx_supported,
+ .xsaves_supported = svm_xsaves_supported,
.set_supported_cpuid = svm_set_supported_cpuid,