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Diffstat (limited to 'arch/x86/kvm/cpuid.c')
-rw-r--r--arch/x86/kvm/cpuid.c37
1 files changed, 22 insertions, 15 deletions
diff --git a/arch/x86/kvm/cpuid.c b/arch/x86/kvm/cpuid.c
index e5503d8aec1d..bea60671ef8a 100644
--- a/arch/x86/kvm/cpuid.c
+++ b/arch/x86/kvm/cpuid.c
@@ -28,7 +28,7 @@ static u32 xstate_required_size(u64 xstate_bv)
int feature_bit = 0;
u32 ret = XSAVE_HDR_SIZE + XSAVE_HDR_OFFSET;
- xstate_bv &= ~XSTATE_FPSSE;
+ xstate_bv &= XSTATE_EXTEND_MASK;
while (xstate_bv) {
if (xstate_bv & 0x1) {
u32 eax, ebx, ecx, edx;
@@ -43,6 +43,16 @@ static u32 xstate_required_size(u64 xstate_bv)
return ret;
}
+u64 kvm_supported_xcr0(void)
+{
+ u64 xcr0 = KVM_SUPPORTED_XCR0 & host_xcr0;
+
+ if (!kvm_x86_ops->mpx_supported())
+ xcr0 &= ~(XSTATE_BNDREGS | XSTATE_BNDCSR);
+
+ return xcr0;
+}
+
void kvm_update_cpuid(struct kvm_vcpu *vcpu)
{
struct kvm_cpuid_entry2 *best;
@@ -73,9 +83,9 @@ void kvm_update_cpuid(struct kvm_vcpu *vcpu)
} else {
vcpu->arch.guest_supported_xcr0 =
(best->eax | ((u64)best->edx << 32)) &
- host_xcr0 & KVM_SUPPORTED_XCR0;
- vcpu->arch.guest_xstate_size =
- xstate_required_size(vcpu->arch.guest_supported_xcr0);
+ kvm_supported_xcr0();
+ vcpu->arch.guest_xstate_size = best->ebx =
+ xstate_required_size(vcpu->arch.xcr0);
}
kvm_pmu_cpuid_update(vcpu);
@@ -210,13 +220,6 @@ static void do_cpuid_1_ent(struct kvm_cpuid_entry2 *entry, u32 function,
entry->flags = 0;
}
-static bool supported_xcr0_bit(unsigned bit)
-{
- u64 mask = ((u64)1 << bit);
-
- return mask & KVM_SUPPORTED_XCR0 & host_xcr0;
-}
-
#define F(x) bit(X86_FEATURE_##x)
static int __do_cpuid_ent_emulated(struct kvm_cpuid_entry2 *entry,
@@ -256,6 +259,7 @@ static inline int __do_cpuid_ent(struct kvm_cpuid_entry2 *entry, u32 function,
#endif
unsigned f_rdtscp = kvm_x86_ops->rdtscp_supported() ? F(RDTSCP) : 0;
unsigned f_invpcid = kvm_x86_ops->invpcid_supported() ? F(INVPCID) : 0;
+ unsigned f_mpx = kvm_x86_ops->mpx_supported() ? F(MPX) : 0;
/* cpuid 1.edx */
const u32 kvm_supported_word0_x86_features =
@@ -303,7 +307,8 @@ static inline int __do_cpuid_ent(struct kvm_cpuid_entry2 *entry, u32 function,
/* cpuid 7.0.ebx */
const u32 kvm_supported_word9_x86_features =
F(FSGSBASE) | F(BMI1) | F(HLE) | F(AVX2) | F(SMEP) |
- F(BMI2) | F(ERMS) | f_invpcid | F(RTM);
+ F(BMI2) | F(ERMS) | f_invpcid | F(RTM) | f_mpx | F(RDSEED) |
+ F(ADX);
/* all calls to cpuid_count() should be made on the same cpu */
get_cpu();
@@ -436,16 +441,18 @@ static inline int __do_cpuid_ent(struct kvm_cpuid_entry2 *entry, u32 function,
}
case 0xd: {
int idx, i;
+ u64 supported = kvm_supported_xcr0();
- entry->eax &= host_xcr0 & KVM_SUPPORTED_XCR0;
- entry->edx &= (host_xcr0 & KVM_SUPPORTED_XCR0) >> 32;
+ entry->eax &= supported;
+ entry->edx &= supported >> 32;
entry->flags |= KVM_CPUID_FLAG_SIGNIFCANT_INDEX;
for (idx = 1, i = 1; idx < 64; ++idx) {
+ u64 mask = ((u64)1 << idx);
if (*nent >= maxnent)
goto out;
do_cpuid_1_ent(&entry[i], function, idx);
- if (entry[i].eax == 0 || !supported_xcr0_bit(idx))
+ if (entry[i].eax == 0 || !(supported & mask))
continue;
entry[i].flags |=
KVM_CPUID_FLAG_SIGNIFCANT_INDEX;