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Mon, 14 Apr 2025 15:41:20 +0000 Message-ID: Date: Mon, 14 Apr 2025 08:41:18 -0700 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH RFC v2 8/9] x86/fpu/apx: Enable APX state support To: "Chang S. Bae" , CC: , , , , References: <20250227184502.10288-1-chang.seok.bae@intel.com> <20250320234301.8342-1-chang.seok.bae@intel.com> <20250320234301.8342-9-chang.seok.bae@intel.com> Content-Language: en-US From: Sohil Mehta In-Reply-To: <20250320234301.8342-9-chang.seok.bae@intel.com> Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: 7bit X-ClientProxiedBy: BY1P220CA0017.NAMP220.PROD.OUTLOOK.COM (2603:10b6:a03:5c3::6) To BYAPR11MB3320.namprd11.prod.outlook.com (2603:10b6:a03:18::25) Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: BYAPR11MB3320:EE_|PH0PR11MB5126:EE_ X-MS-Office365-Filtering-Correlation-Id: 03758627-6b65-4b0c-1d8b-08dd7b6acd19 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|366016|376014|1800799024; X-Microsoft-Antispam-Message-Info: =?utf-8?B?QmZrYWJoVlREOWJ2bmNoR0FoTmlVZjhTeGE5TGlVNUUvR2ZaUnhBL2tRWnVT?= =?utf-8?B?MDJBenRzTEl1VENkZEZURmJyVzB4RTVzVGNlcFhJSENJZ3VwNGgvTyttRkVV?= =?utf-8?B?aUUycldXMXlNNGZhTVhJT2xsQlFzSFd2Y3Z4YnRBWm1KWjJvYVpyaE82eGN5?= =?utf-8?B?dE5qVWVOU3ZGWXQ3cS8ra2tPT2JHTkxGdzBDVU1LelNSajhrQThEa2V6ME1y?= =?utf-8?B?N1NRVXV3ZGVwYWY5M1czQkgzb0NtSXdad0xQWG1aRndwL1pIVHdyaWlXcjJi?= =?utf-8?B?ODMyVFhnd3FhelBueWw0QTNUd0xSKzlMbVFFa2p2czl2OVJaNWNWU1NMK211?= =?utf-8?B?SkEvT2FqenY1dmZDZzV3djh2Ui9wZFFXNHNLTzhBUzQva0owenlhc1BKa3VO?= =?utf-8?B?cGZpbFR2ZmxrN1VnNitwN3JiNGd2ZVBWaHlqeThWNGNKSVpRVVFYYWFxSVV6?= =?utf-8?B?blJobUxiSVgwZG9GSFpBMFVIVzhDUVY2eGlyYVROL1c3dytFQUNZS0UxcFgz?= =?utf-8?B?QzRZeHdjdVR5K1VuOTFreStjaGtaVjY5Q28xNjRrbmIwR2gzRHBjdC9TQm9p?= =?utf-8?B?K1JVa1JzakRVS3NTQnJ1L2E0VTJsaVB3elY3ZGJLaWZQZDZ4QVU1eVFjaGFJ?= =?utf-8?B?VGZHbkIxeFV0blZGYjZ1MldGL2lRRktzak9hVUt0bktFMDVob28waUlJSjdR?= =?utf-8?B?bzlyVFRkakdJL0NaeXRKV2crTWhjRTdIMnhiMytTdU9odUxoU2FpbzRIK3dh?= =?utf-8?B?K3NaK2dqdVF0Ynk3V0pwZWdUZmdSdmIxWjhkZnE5d09acXRnd0hEdnZ3RmZL?= =?utf-8?B?cUNmbmJCZkRyRUJxVG5ORVl0N3ZsR2tMeE5IclBmVmpSUTdQcFJyZDZqdFBs?= =?utf-8?B?LzZ4WTFsZ0RSTEdIY2VyNVhJcXc4RVYwMVlXS0NvUGQrQlJXM0Voby9UZlht?= =?utf-8?B?OWN5TTEwNUxqK0pDL25JOVY4cUFaamVFN0VWZ241TkhrYWhLMFFyN1BTM2hQ?= =?utf-8?B?RmQzRlFrNkVidGQ5bmluMGRtUjlmM2NWSmUwazFsU3pWN0NOWkJrTnhIN3hk?= =?utf-8?B?Y3lQVWc3Mkg1WXJVcnBUZHlqbWNTVHNqbENVNjc1L0FGNlRONzZzME9JZVAx?= =?utf-8?B?b0NaV3A4RmUyM3lHcGk0RTVMOWFTS3FoOXJacm9UWUFSbU5OeldGaWExMmZE?= =?utf-8?B?NldKbEp6cyttNlBZenl0a3BRODJGT2hGSUkzclhvVDZGOXUwQnJJWEdoTnJ2?= =?utf-8?B?amZtQmFXelpKMXhZNDYrNjRHK0VIcEFJV3l6bXVJMDIrSUEwdURDSmZrR2tZ?= =?utf-8?B?Z3E3RGxWK0grMTg0eHdWSFU2QkdRWnZVY05TczVHd3JBOUZPT2w4Q25YZ0hW?= =?utf-8?B?T1FqdGFaZUttZGcxMzZnbVErVG5PQ0R0NGlqYTNlUmJ5OGdoYnVUa0dXTWoy?= =?utf-8?B?M3FFd0w4VHBieXR1NEdIRmpzdGI4YVErWUpiLzZSK1ZtMDYySnZVeDk5c3V6?= =?utf-8?B?dWxWMnlJM3l5OGp0aUt5alN6RTZVK3lNNkpNdi9LRDFmbzkxQ1lwdUdEa3Rk?= =?utf-8?B?Nk84ZDNhaDNYbWk4V0NCZ1RjQ0xseTExcUh6ak9Wa1pRbEl0UEZWU21HVTZw?= =?utf-8?B?MHVGWERNZTF2dnR1Z1BpQmZrRGNFSnN6SW9MRFZtcEM0YjAvZ1F3N2dtL0pD?= =?utf-8?B?T00xSW42WnN1NHVNVFdOVWZ1MWdic0ZrN1ArS0ZIT3FGYUNISFhaUXlNekxW?= =?utf-8?B?YlVsUVZqVVdSaHJ4YmZuaXBYWHFUbE8zRUp5UUNLa2E4SEV0cnVpaHFndENB?= =?utf-8?B?d2lqMlFCTm4ycjcrMmIzSVUzaWp5elRVZGx6N2VEam01MVA1Ukh0UWVZbUdq?= =?utf-8?B?dzFYZnhmaW4vazVGaXVIcE1nZjA2Q01YaHZmQndKUFZNdVN0VWZIRHFOcW9N?= =?utf-8?Q?FHhOdmgoGIo=3D?= X-Forefront-Antispam-Report: CIP:255.255.255.255;CTRY:;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:BYAPR11MB3320.namprd11.prod.outlook.com;PTR:;CAT:NONE;SFS:(13230040)(366016)(376014)(1800799024);DIR:OUT;SFP:1101; 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Bae wrote: > With securing APX against conflicting MPX, it is now ready to be enabled. > Include APX in the enabled xfeature set. > > Signed-off-by: Chang S. Bae > --- > arch/x86/include/asm/fpu/xstate.h | 3 ++- > arch/x86/kernel/fpu/xstate.c | 3 ++- > 2 files changed, 4 insertions(+), 2 deletions(-) > Reviewed-by: Sohil Mehta > diff --git a/arch/x86/include/asm/fpu/xstate.h b/arch/x86/include/asm/fpu/xstate.h > index 7f39fe7980c5..b308a76afbb7 100644 > --- a/arch/x86/include/asm/fpu/xstate.h > +++ b/arch/x86/include/asm/fpu/xstate.h > @@ -32,7 +32,8 @@ > XFEATURE_MASK_PKRU | \ > XFEATURE_MASK_BNDREGS | \ > XFEATURE_MASK_BNDCSR | \ > - XFEATURE_MASK_XTILE) > + XFEATURE_MASK_XTILE | \ > + XFEATURE_MASK_APX) > > /* > * Features which are restored when returning to user space. > diff --git a/arch/x86/kernel/fpu/xstate.c b/arch/x86/kernel/fpu/xstate.c > index 0d68d5c4bc48..a5e3954dc834 100644 > --- a/arch/x86/kernel/fpu/xstate.c > +++ b/arch/x86/kernel/fpu/xstate.c > @@ -371,7 +371,8 @@ static __init void os_xrstor_booting(struct xregs_state *xstate) > XFEATURE_MASK_BNDCSR | \ > XFEATURE_MASK_PASID | \ > XFEATURE_MASK_CET_USER | \ > - XFEATURE_MASK_XTILE) > + XFEATURE_MASK_XTILE | \ > + XFEATURE_MASK_APX) > > /* > * setup the xstate image representing the init state