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Tue, 25 Aug 2020 16:06:09 +0000 From: Wei Chen To: , , CC: , , , , Subject: [PATCH v4 0/2] Fix Guest random crash on Cortex-N1/A76/A75 cores Date: Tue, 25 Aug 2020 16:06:01 +0000 Message-ID: <20200825160603.32388-1-wei.chen@arm.com> X-Mailer: git-send-email 2.17.1 MIME-Version: 1.0 X-EOPAttributedMessage: 1 X-MS-Office365-Filtering-HT: Tenant X-MS-PublicTrafficType: Email X-MS-Office365-Filtering-Correlation-Id: 4e648913-c2a3-453a-5859-08d84910e826 X-MS-TrafficTypeDiagnostic: DB6PR0802MB2551:|AM7PR08MB5384: X-Microsoft-Antispam-PRVS: x-checkrecipientrouted: true NoDisclaimer: true X-MS-Oob-TLC-OOBClassifiers: OLM:5797;OLM:5797; X-MS-Exchange-SenderADCheck: 1 X-Microsoft-Antispam-Untrusted: BCL:0; X-Microsoft-Antispam-Message-Info-Original: Rx1LjyFm/o6yFcEIrBFt3iZLFrnDyaeRAn2QGCuIOJYm0Yp0iqUZmMTzvT9aZZrXYVcYkzFUfBFg4rEzpgWKrfxZwv2t+gUQjoQSILk/hst689NbHSeYbpl+Y2Rzvw16EB3CEEyauWQ/i4F4nQfoaL1wtzeXiHyxpU0z8PZsTEikZ8RSKFSQy/HMahmhkm+5NmWsxkQA5vPoDEWXZgrh2WxOvw/IXk0j8Jki+kLwHBgh+KnxxIeZYtiyvMgIdsYYS5f1znr10u+6jigcdsu/jFL1B/9oLoVHiISqXwiyfTa5KUX/opPFnZvKxrYFB4hu30x2cHQQW0Vztly8zzzEqqll4SK+wQWtYDbEEtJe8bEpGR0EMX0JZCDyGcyqAFGTRecfV8t6+Y42C2y/9CKHFHN3cAvsFjv8W2mEj8LDjcGmnynJCidV7LLYTDBjdRMuqmihhjf6OPEjbKz7TS+BlDZzJrW/ROC8TwxSAlGIw7s= X-Forefront-Antispam-Report-Untrusted: CIP:40.67.248.234; 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CTRY:IE; LANG:en; SCL:1; SRV:; IPV:CAL; SFV:NSPM; H:64aa7808-outbound-1.mta.getcheckrecipient.com; PTR:ec2-63-35-35-123.eu-west-1.compute.amazonaws.com; CAT:NONE; SFS:(4636009)(396003)(39850400004)(136003)(346002)(376002)(46966005)(186003)(478600001)(966005)(36906005)(86362001)(70206006)(316002)(26005)(47076004)(54906003)(82740400003)(2906002)(110136005)(5660300002)(70586007)(4744005)(336012)(6666004)(36756003)(1076003)(44832011)(83380400001)(81166007)(8936002)(426003)(8676002)(2616005)(82310400002)(4326008); DIR:OUT; SFP:1101; X-OriginatorOrg: arm.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 25 Aug 2020 16:07:03.4968 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 4e648913-c2a3-453a-5859-08d84910e826 X-MS-Exchange-CrossTenant-Id: f34e5979-57d9-4aaa-ad4d-b122a662184d X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=f34e5979-57d9-4aaa-ad4d-b122a662184d; Ip=[63.35.35.123]; Helo=[64aa7808-outbound-1.mta.getcheckrecipient.com] X-MS-Exchange-CrossTenant-AuthSource: VE1EUR03FT005.eop-EUR03.prod.protection.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: AM7PR08MB5384 X-BeenThere: xen-devel@lists.xenproject.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Xen developer discussion List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Errors-To: xen-devel-bounces@lists.xenproject.org Sender: "Xen-devel" On latest Arm Cortex-N1/A76/A75 cores, Xen guests will encouter random crash when they have wordloads. It's because Xen will ignore FP/SIMD registers in vCPU context switch (see patch#1 for more details). This patch set fix guest random crash on these new cores, and throw messages when Xen detects known FP/SIMD features. --- v3 --> v4: 1. Use open-code instead of new cpu_has_unknown_{fp,simd} macros. v2 --> v3: 1. Improve the warning messages to give clear meanings 2. Fix typos v1 --> v2: 1. Use "< 8" instead of "<= 1" to detect FP/SIMD features. 2. Give messages for unknown FP/SIMD features. 3. Fix typos. v1: https://lists.xenproject.org/archives/html/xen-devel/2020-08/msg00857.html Wei Chen (2): xen/arm: Missing N1/A76/A75 FP registers in vCPU context switch xen/arm: Throw messages for unknown FP/SIMD implement ID xen/arch/arm/setup.c | 12 ++++++++++++ xen/include/asm-arm/cpufeature.h | 4 ++-- 2 files changed, 14 insertions(+), 2 deletions(-)