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client-ip=165.204.84.17; helo=satlexmb08.amd.com; pr=C Received: from satlexmb08.amd.com (165.204.84.17) by SA2PEPF00003F61.mail.protection.outlook.com (10.167.248.36) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.9137.12 via Frontend Transport; Wed, 17 Sep 2025 15:40:18 +0000 Received: from satlexmb10.amd.com (10.181.42.219) by satlexmb08.amd.com (10.181.42.217) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.2562.17; Wed, 17 Sep 2025 08:40:18 -0700 Received: from satlexmb07.amd.com (10.181.42.216) by satlexmb10.amd.com (10.181.42.219) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.2562.17; Wed, 17 Sep 2025 08:40:18 -0700 Received: from [10.252.198.192] (10.180.168.240) by satlexmb07.amd.com (10.181.42.216) with Microsoft SMTP Server id 15.2.2562.17 via Frontend Transport; Wed, 17 Sep 2025 08:40:14 -0700 Message-ID: <00d97fad-f67a-47c4-a829-fb7295dc6d19@amd.com> Date: Wed, 17 Sep 2025 21:10:08 +0530 Precedence: bulk X-Mailing-List: linux-perf-users@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v2 06/12] x86/cpufeatures: Add CPUID feature bit for VIBS in SVM/SEV guests To: Nikunj A Dadhania CC: , , , , , , , , , , , References: <20250901051656.209083-1-manali.shukla@amd.com> <20250901052304.209199-1-manali.shukla@amd.com> <85v7lq31hd.fsf@amd.com> Content-Language: en-US From: Manali Shukla In-Reply-To: <85v7lq31hd.fsf@amd.com> Content-Type: text/plain; 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X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 17 Sep 2025 15:40:18.7613 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: d57783b6-a77f-4488-afbe-08ddf6008167 X-MS-Exchange-CrossTenant-Id: 3dd8961f-e488-4e60-8e11-a82d994e183d X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=3dd8961f-e488-4e60-8e11-a82d994e183d;Ip=[165.204.84.17];Helo=[satlexmb08.amd.com] X-MS-Exchange-CrossTenant-AuthSource: SA2PEPF00003F61.namprd04.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: PH7PR12MB8054 On 9/10/2025 6:31 PM, Nikunj A Dadhania wrote: > Manali Shukla writes: > >> 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 >> --- >> 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 0dd44cbf7196..3c31dea00671 100644 >> --- a/arch/x86/include/asm/cpufeatures.h >> +++ b/arch/x86/include/asm/cpufeatures.h >> @@ -379,6 +379,7 @@ >> #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_EXTLVT (15*32+27) /* Extended Local vector Table */ >> +#define X86_FEATURE_VIBS (15*32+26) /* Virtual IBS */ > > Please move before EXTLVT to maintain bit position order > > Regards, > Nikunj Ack, will fix it up in V3. -Manali > >> #define X86_FEATURE_SVME_ADDR_CHK (15*32+28) /* SVME addr check */ >> #define X86_FEATURE_BUS_LOCK_THRESHOLD (15*32+29) /* Bus lock threshold */ >> #define X86_FEATURE_IDLE_HLT (15*32+30) /* IDLE HLT intercept */ >> -- >> 2.43.0