According to latest Software Development Manual vol.2/3.2, for CPUID.(EAX=0xD,ECX=1), it should report xsaves area size containing all states enabled by XCR0|IA32_MSR_XSS. Signed-off-by: Zhang Yi Z <yi.z.zhang@xxxxxxxxxxxxxxx> Signed-off-by: Yang Weijiang <weijiang.yang@xxxxxxxxx> --- arch/x86/kvm/cpuid.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/arch/x86/kvm/cpuid.c b/arch/x86/kvm/cpuid.c index 5bac31e58955..55c282f71f93 100644 --- a/arch/x86/kvm/cpuid.c +++ b/arch/x86/kvm/cpuid.c @@ -121,7 +121,8 @@ int kvm_update_cpuid(struct kvm_vcpu *vcpu) best = kvm_find_cpuid_entry(vcpu, 0xD, 1); if (best && (best->eax & (F(XSAVES) | F(XSAVEC)))) - best->ebx = xstate_required_size(vcpu->arch.xcr0, true); + best->ebx = xstate_required_size(vcpu->arch.xcr0 | + best->ecx | ((u64)best->edx << 32), true); /* * The existing code assumes virtual address is 48-bit or 57-bit in the -- 2.17.1
