From: Manali Shukla <manali.shukla@amd.com>
To: <seanjc@google.com>, <pbonzini@redhat.com>
Cc: <mingo@redhat.com>, <bp@alien8.de>, <kvm@vger.kernel.org>,
<x86@kernel.org>, <santosh.shukla@amd.com>,
<nikunj.dadhania@amd.com>, <Naveen.Rao@amd.com>,
<dapeng1.mi@linux.intel.com>, <ravi.bangoria@amd.com>,
<peterz@infradead.org>, <Sandipan.Das@amd.com>
Subject: [PATCH v3 2/9] x86/cpufeatures: Add CPUID feature bit for VIBS in SVM/SEV guests
Date: Tue, 10 Mar 2026 06:00:14 +0000 [thread overview]
Message-ID: <20260310060022.15120-3-manali.shukla@amd.com> (raw)
In-Reply-To: <20260310060022.15120-1-manali.shukla@amd.com>
From: Santosh Shukla <santosh.shukla@amd.com>
The virtualized IBS (VIBS) feature allows the guest to collect IBS
samples without exiting the guest.
Presence of the VIBS feature is indicated via CPUID function
0x8000000A_EDX[26].
Signed-off-by: Santosh Shukla <santosh.shukla@amd.com>
Signed-off-by: Manali Shukla <manali.shukla@amd.com>
---
arch/x86/include/asm/cpufeatures.h | 1 +
1 file changed, 1 insertion(+)
diff --git a/arch/x86/include/asm/cpufeatures.h b/arch/x86/include/asm/cpufeatures.h
index b1631eb15e74..a1cd6437a052 100644
--- a/arch/x86/include/asm/cpufeatures.h
+++ b/arch/x86/include/asm/cpufeatures.h
@@ -382,6 +382,7 @@
#define X86_FEATURE_X2AVIC (15*32+18) /* "x2avic" Virtual x2apic */
#define X86_FEATURE_V_SPEC_CTRL (15*32+20) /* "v_spec_ctrl" Virtual SPEC_CTRL */
#define X86_FEATURE_VNMI (15*32+25) /* "vnmi" Virtual NMI */
+#define X86_FEATURE_VIBS (15*32+26) /* Virtual IBS */
#define X86_FEATURE_AVIC_EXTLVT (15*32+27) /* Extended LVT AVIC acceleration support */
#define X86_FEATURE_SVME_ADDR_CHK (15*32+28) /* SVME addr check */
#define X86_FEATURE_BUS_LOCK_THRESHOLD (15*32+29) /* Bus lock threshold */
--
2.43.0
next prev parent reply other threads:[~2026-03-10 6:00 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-03-10 6:00 [PATCH v3 0/9] Implement support for IBS virtualization Manali Shukla
2026-03-10 6:00 ` [PATCH v3 1/9] perf/amd/ibs: Fix race condition in IBS Manali Shukla
2026-10-08 17:19 ` Jim Mattson
2026-03-10 6:00 ` Manali Shukla [this message]
2026-10-08 17:28 ` [PATCH v3 2/9] x86/cpufeatures: Add CPUID feature bit for VIBS in SVM/SEV guests Jim Mattson
2026-03-10 6:00 ` [PATCH v3 3/9] KVM: x86/cpuid: Add a KVM-only leaf for IBS capabilities Manali Shukla
2026-10-08 17:44 ` Jim Mattson
2026-03-10 6:00 ` [PATCH v3 4/9] KVM: x86: Extend CPUID range to include new leaf Manali Shukla
2026-10-08 17:59 ` Jim Mattson
2026-03-10 6:00 ` [PATCH v3 5/9] KVM: SVM: Extend VMCB area for virtualized IBS registers Manali Shukla
2026-10-08 18:01 ` Jim Mattson
2026-03-10 6:00 ` [PATCH v3 6/9] KVM: SVM: Add support for IBS Virtualization Manali Shukla
2026-10-08 19:19 ` Jim Mattson
2026-10-08 21:28 ` Jim Mattson
2026-03-10 6:00 ` [PATCH v3 7/9] perf/x86/amd: Enable VPMU passthrough capability for IBS PMU Manali Shukla
2026-10-08 19:32 ` Jim Mattson
2026-03-10 6:00 ` [PATCH v3 8/9] perf/x86/amd: Remove exclude_guest check from perf_ibs_init() Manali Shukla
2026-10-08 19:38 ` Jim Mattson
2026-03-10 6:00 ` [PATCH v3 9/9] KVM: SVM: Add newly added IBS capabilities and MSRs Manali Shukla
2026-10-08 21:03 ` Jim Mattson
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