* [PATCH] KVM:x86: AMD Processor Topology Information
[not found] <20171029215633.3102-1-pixo@polepetko.eu>
@ 2018-01-29 16:39 ` Babu Moger
2018-01-30 13:54 ` Radim Krčmář
0 siblings, 1 reply; 2+ messages in thread
From: Babu Moger @ 2018-01-29 16:39 UTC (permalink / raw)
To: pbonzini, rkrcmar, tglx, mingo, hpa; +Cc: x86, kvm, linux-kernel, pixo
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(-)
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 =
--
2.16.0
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