Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit dbf38b17 authored by Paolo Bonzini's avatar Paolo Bonzini Committed by Greg Kroah-Hartman
Browse files

KVM: x86: use Intel speculation bugs and features as derived in generic x86 code 



commit 0c54914d0c52a15db9954a76ce80fee32cf318f4 upstream.

Similar to AMD bits, set the Intel bits from the vendor-independent
feature and bug flags, because KVM_GET_SUPPORTED_CPUID does not care
about the vendor and they should be set on AMD processors as well.

Suggested-by: default avatarJim Mattson <jmattson@google.com>
Reviewed-by: default avatarJim Mattson <jmattson@google.com>
Signed-off-by: default avatarPaolo Bonzini <pbonzini@redhat.com>
Signed-off-by: default avatarThomas Gleixner <tglx@linutronix.de>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent fee619bb

arch/x86/kvm/cpuid.c

+8 −0
Original line number Diff line number Diff line
@@ -501,8 +501,16 @@ static inline int __do_cpuid_ent(struct kvm_cpuid_entry2 *entry, u32 function, 
			/* PKU is not yet implemented for shadow paging. */

			if (!tdp_enabled || !boot_cpu_has(X86_FEATURE_OSPKE))

				entry->ecx &= ~F(PKU);



			entry->edx &= kvm_cpuid_7_0_edx_x86_features;

			cpuid_mask(&entry->edx, CPUID_7_EDX);

			if (boot_cpu_has(X86_FEATURE_IBPB) &&

			    boot_cpu_has(X86_FEATURE_IBRS))

				entry->edx |= F(SPEC_CTRL);

			if (boot_cpu_has(X86_FEATURE_STIBP))

				entry->edx |= F(INTEL_STIBP);

			if (boot_cpu_has(X86_FEATURE_SSBD))

				entry->edx |= F(SPEC_CTRL_SSBD);

			/*

			 * We emulate ARCH_CAPABILITIES in software even

			 * if the host doesn't support it.

arch/x86/kvm/x86.c

+8 −0
Original line number Diff line number Diff line
@@ -1142,8 +1142,16 @@ u64 kvm_get_arch_capabilities(void) 
	if (l1tf_vmx_mitigation != VMENTER_L1D_FLUSH_NEVER)

		data |= ARCH_CAP_SKIP_VMENTRY_L1DFLUSH;



	if (!boot_cpu_has_bug(X86_BUG_CPU_MELTDOWN))

		data |= ARCH_CAP_RDCL_NO;

	if (!boot_cpu_has_bug(X86_BUG_SPEC_STORE_BYPASS))

		data |= ARCH_CAP_SSB_NO;

	if (!boot_cpu_has_bug(X86_BUG_MDS))

		data |= ARCH_CAP_MDS_NO;



	return data;

}



EXPORT_SYMBOL_GPL(kvm_get_arch_capabilities);



static int kvm_get_msr_feature(struct kvm_msr_entry *msr)