diff --git a/arch/x86/kvm/cpuid.h b/arch/x86/kvm/cpuid.h index a10e4601685135f0b5da599508be35eb754816ec..58fc5148882857c014a49b78403a597424c08e64 100644 --- a/arch/x86/kvm/cpuid.h +++ b/arch/x86/kvm/cpuid.h @@ -24,6 +24,9 @@ static inline bool guest_cpuid_has_xsave(struct kvm_vcpu *vcpu) { struct kvm_cpuid_entry2 *best; + if (!static_cpu_has(X86_FEATURE_XSAVE)) + return 0; + best = kvm_find_cpuid_entry(vcpu, 1, 0); return best && (best->ecx & bit(X86_FEATURE_XSAVE)); } diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c index 224a7e78cb6c40330dfebc943e315c0a7231efa1..4f7641756be2d046cd55e3d59de76e145d3c39ae 100644 --- a/arch/x86/kvm/x86.c +++ b/arch/x86/kvm/x86.c @@ -5781,6 +5781,9 @@ int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu, int pending_vec, max_bits, idx; struct desc_ptr dt; + if (!guest_cpuid_has_xsave(vcpu) && (sregs->cr4 & X86_CR4_OSXSAVE)) + return -EINVAL; + dt.size = sregs->idt.limit; dt.address = sregs->idt.base; kvm_x86_ops->set_idt(vcpu, &dt);