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KVM:x86: AMD Processor Topology Information

Message ID 20180129163944.114684-1-babu.moger@amd.com (mailing list archive)
State New, archived
Headers show

Commit Message

Moger, Babu Jan. 29, 2018, 4:39 p.m. UTC 
From: Stanislav Lanci <pixo@polepetko.eu>

This patch allow to enable x86 feature TOPOEXT. This is needed to provide
information about SMT on AMD Zen CPUs to the guest.

Signed-off-by: Stanislav Lanci <pixo@polepetko.eu>
Tested-by: Nick Sarnie <commendsarnex@gmail.com>
Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Babu Moger <babu.moger@amd.com>
---

Rebased on top of linux-next.
Maximum extended functions are already set to 0x8000001f after the commit
8765d75329a3 KVM: X86: Extend CPUID range to include new leaf

 arch/x86/kvm/cpuid.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

Comments

Radim Krčmář Jan. 30, 2018, 1:54 p.m. UTC | #1 
2018-01-29 11:39-0500, Babu Moger:
> From: Stanislav Lanci <pixo@polepetko.eu>
> 
> This patch allow to enable x86 feature TOPOEXT. This is needed to provide
> information about SMT on AMD Zen CPUs to the guest.
> 
> Signed-off-by: Stanislav Lanci <pixo@polepetko.eu>
> Tested-by: Nick Sarnie <commendsarnex@gmail.com>
> Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
> Signed-off-by: Babu Moger <babu.moger@amd.com>
> ---
> 
> Rebased on top of linux-next.
> Maximum extended functions are already set to 0x8000001f after the commit
> 8765d75329a3 KVM: X86: Extend CPUID range to include new leaf

Queued, thanks.
diff mbox

Patch

diff --git a/arch/x86/kvm/cpuid.c b/arch/x86/kvm/cpuid.c
index ac0041c2f5af..20e491b94f44 100644
--- a/arch/x86/kvm/cpuid.c
+++ b/arch/x86/kvm/cpuid.c
@@ -371,7 +371,8 @@  static inline int __do_cpuid_ent(struct kvm_cpuid_entry2 *entry, u32 function,
 		F(LAHF_LM) | F(CMP_LEGACY) | 0 /*SVM*/ | 0 /* ExtApicSpace */ |
 		F(CR8_LEGACY) | F(ABM) | F(SSE4A) | F(MISALIGNSSE) |
 		F(3DNOWPREFETCH) | F(OSVW) | 0 /* IBS */ | F(XOP) |
-		0 /* SKINIT, WDT, LWP */ | F(FMA4) | F(TBM);
+		0 /* SKINIT, WDT, LWP */ | F(FMA4) | F(TBM) |
+		F(TOPOEXT);
 
 	/* cpuid 0xC0000001.edx */
 	const u32 kvm_cpuid_C000_0001_edx_x86_features =