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From: Babu Moger <babu.moger@amd.com>
To: pbonzini@redhat.com, rkrcmar@redhat.com, tglx@linutronix.de,
	mingo@redhat.com, hpa@zytor.com
Cc: x86@kernel.org, kvm@vger.kernel.org,
	linux-kernel@vger.kernel.org, pixo@polepetko.eu
Subject: [PATCH] KVM:x86: AMD Processor Topology Information
Date: Mon, 29 Jan 2018 11:39:44 -0500	[thread overview]
Message-ID: <20180129163944.114684-1-babu.moger@amd.com> (raw)
In-Reply-To: <20171029215633.3102-1-pixo@polepetko.eu>

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

  parent reply	other threads:[~2018-01-29 16:40 UTC|newest]

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2017-10-29 21:56 [PATCH] KVM:x86: AMD Processor Topology Information Stanislav Lanci
2017-10-29 22:44 ` Nick Sarnie
2018-01-26 21:04 ` Babu Moger
2018-01-26 22:53 ` Paolo Bonzini
2018-01-29 16:39 ` Babu Moger [this message]
2018-01-30 13:54   ` Radim Krčmář

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