According to the SDM, Vol 2, CPUID(EAX=0xD,ECX=1) reports the XSAVE size containing all states enabled by XCR0|IA32_MSR_XSS. Signed-off-by: Yang Weijiang <weijiang.yang@xxxxxxxxx> Co-developed-by: Zhang Yi Z <yi.z.zhang@xxxxxxxxxxxxxxx> --- 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 b9fc967fe55a..7be16ef0ea4a 100644 --- a/arch/x86/kvm/cpuid.c +++ b/arch/x86/kvm/cpuid.c @@ -123,7 +123,8 @@ 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 | + kvm_supported_xss(), true); /* * The existing code assumes virtual address is 48-bit or 57-bit in the -- 2.17.2
