Messages in this thread Patch in this message | | | From | Yang Weijiang <> | Subject | [RFC PATCH v4 3/8] KVM:CPUID: Fix xsaves area size calculation for CPUID.(EAX=0xD,ECX=1). | Date | Mon, 18 Mar 2019 23:03:46 +0800 |
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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@linux.intel.com> Signed-off-by: Yang Weijiang <weijiang.yang@intel.com> --- 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 53abd6019c68..29d6a5cdc746 100644 --- a/arch/x86/kvm/cpuid.c +++ b/arch/x86/kvm/cpuid.c @@ -126,7 +126,8 @@ 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 -- 2.17.1
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