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AKwUvBzydeFDDHESnYSVt/0BRopYE3/3E+kSwwLW5lXghK08WWHs+zr6vKKVOOM3KutM5POp7l0=@vger.kernel.org X-Gm-Message-State: AFuF++kyETARdWi4yU9vK22HbFhSmWj+r17hgMMQLuG1nWwxO5fd3Hdw ugWNyvwivYB6Mvv2Yh9WTohc4NxDGPmBjHm0oCnScj4I7zkAiZYaVP0u+mDv8qbUNZv1jRCQKEO 13C7wKfQRTf4FBQ== X-Received: from pgaa8-n1.prod.google.com ([2002:a05:6a02:6488:10b0:cc7:b6ea:3094]) (user=jmattson job=prod-delivery.src-stubby-dispatcher) by 2002:a05:6a21:e8b:b0:3e0:b1b2:2ae9 with SMTP id adf61e73a8af0-3e1340999cfmr5753819637.47.1791480526005; Thu, 08 Oct 2026 10:28:46 -0700 (PDT) Date: Thu, 8 Oct 2026 10:28:40 -0700 In-Reply-To: <20260310060022.15120-3-manali.shukla@amd.com> Precedence: bulk X-Mailing-List: kvm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 References: <20260310060022.15120-1-manali.shukla@amd.com> <20260310060022.15120-3-manali.shukla@amd.com> X-Mailer: git-send-email 2.56.0.385.gd3acb90ef8-goog Message-ID: <20261008172843.680198-1-jmattson@google.com> Subject: Re: [PATCH v3 2/9] x86/cpufeatures: Add CPUID feature bit for VIBS in SVM/SEV guests From: Jim Mattson To: Manali Shukla Cc: Jim Mattson , seanjc@google.com, pbonzini@redhat.com, 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, Yosry Ahmed Content-Type: text/plain; charset="UTF-8" On Tue, Mar 10, 2026 at 06:00:14AM +0000, Manali Shukla wrote: > From: Santosh Shukla > > 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 > Signed-off-by: Manali Shukla Reviewed-by: Jim Mattson