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Peter Anvin" , Michael Roth , Joerg Roedel , Andy Lutomirski , Peter Zijlstra Subject: [PATCH v1 0/2] Provide SEV-SNP support for unaccepted memory Date: Fri, 29 Jul 2022 09:01:13 -0500 Message-ID: X-Mailer: git-send-email 2.36.1 In-Reply-To: <20220614120231.48165-1-kirill.shutemov@linux.intel.com> References: <20220614120231.48165-1-kirill.shutemov@linux.intel.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain X-Originating-IP: [10.180.168.240] X-ClientProxiedBy: SATLEXMB04.amd.com (10.181.40.145) To SATLEXMB04.amd.com (10.181.40.145) X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-Office365-Filtering-Correlation-Id: 5d788131-8bbb-444a-dea7-08da716adbd5 X-MS-TrafficTypeDiagnostic: BL3PR12MB6379:EE_ X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; X-Microsoft-Antispam-Message-Info: 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 X-Forefront-Antispam-Report: CIP:165.204.84.17;CTRY:US;LANG:en;SCL:1;SRV:;IPV:CAL;SFV:NSPM;H:SATLEXMB04.amd.com;PTR:InfoDomainNonexistent;CAT:NONE;SFS:(13230016)(4636009)(346002)(376002)(136003)(39860400002)(396003)(36840700001)(46966006)(40470700004)(40480700001)(2616005)(26005)(36860700001)(8676002)(41300700001)(966005)(4326008)(83380400001)(7416002)(40460700003)(70586007)(82310400005)(70206006)(5660300002)(110136005)(2906002)(8936002)(54906003)(82740400003)(6666004)(36756003)(426003)(336012)(47076005)(7696005)(356005)(478600001)(86362001)(316002)(16526019)(186003)(81166007)(36900700001);DIR:OUT;SFP:1101; X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 29 Jul 2022 14:01:39.3170 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 5d788131-8bbb-444a-dea7-08da716adbd5 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=[SATLEXMB04.amd.com] X-MS-Exchange-CrossTenant-AuthSource: CO1NAM11FT049.eop-nam11.prod.protection.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: BL3PR12MB6379 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org This series adds SEV-SNP support for unaccepted memory to the patch series titled: [PATCHv7 00/14] mm, x86/cc: Implement support for unaccepted memory Currently, when changing the state of a page under SNP, the page state change structure is kmalloc()'d. This lead to hangs during boot when accepting memory because the allocation can trigger the need to accept more memory. So this series consists of two patches: - A pre-patch to switch from a kmalloc()'d page state change structure to a per-CPU page state change structure. - SNP support for unaccepted memory. The series is based off of and tested against Kirill Shutemov's tree: https://github.com/intel/tdx.git guest-unaccepted-memory --- Tom Lendacky (2): x86/sev: Use per-CPU PSC structure in prep for unaccepted memory support x86/sev: Add SNP-specific unaccepted memory support arch/x86/Kconfig | 1 + arch/x86/boot/compressed/mem.c | 3 ++ arch/x86/boot/compressed/sev.c | 10 ++++- arch/x86/boot/compressed/sev.h | 23 ++++++++++ arch/x86/include/asm/sev.h | 3 ++ arch/x86/kernel/sev.c | 76 ++++++++++++++++++++++++--------- arch/x86/mm/unaccepted_memory.c | 4 ++ 7 files changed, 98 insertions(+), 22 deletions(-) create mode 100644 arch/x86/boot/compressed/sev.h -- 2.36.1