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Sampat" To: , , , , , , CC: , , , , , , , , , , Subject: [PATCH 0/7] Implement SNP live firmware update support Date: Thu, 10 Sep 2026 17:01:55 +0000 Message-ID: X-Mailer: git-send-email 2.43.0 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain X-ClientProxiedBy: satlexmb08.amd.com (10.181.42.217) To satlexmb07.amd.com (10.181.42.216) X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: CH1PEPF0000AD77:EE_|DM4PR12MB6039:EE_ X-MS-Office365-Filtering-Correlation-Id: 3bb48823-bc69-4af6-66aa-08df0f5d4036 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|23010399003|36860700016|1800799024|82310400026|7416014|376014|56012099006|10067099003|11063799006|18002099003; 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:NLI;SFV:NSPM;H:satlexmb07.amd.com;PTR:InfoDomainNonexistent;CAT:NONE;SFS:(13230040)(23010399003)(36860700016)(1800799024)(82310400026)(7416014)(376014)(56012099006)(10067099003)(11063799006)(18002099003);DIR:OUT;SFP:1101; X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: zT2mEnKgHYLqdD8+TYTzHpVDpPV/uj0NuE+fkOFBMzV442QikkejWkrOKF/QHvzBFH5ALtfb6RWC8zDAnDiK3NiNRryjn0OF2wrUzU29z5j+TFlr/0MPRBFeamedwgMbhVPnfdKF53OERtkxZw+/lA3coZX2tbR88bKMfRIE/ma2h74YCS7v7hgx2cn2OLvEWK8MuEVFoB6se0qHZ3QvRYEPEZ8fARciBHq5B28xpFmsvBbwE3Y2VAN3W+Zy7uxpblAbMlf/ofEbRI0FhGSZtBtGd2YPEqU0ZiRsbWQuqARCsxqVBEr9QJAcmNxR1+dGWiIjnFiI5oeW07V9/hbMsh5CdFr6vsN3dsd1woDHbIf5a1Z0Bz8jicdfPLU90CDUObmevyPUgbFg7HgKwyoWvQMvcs2flzXPi4U4i4qtHYLACtrUp+wq/DbWQwuc7JiN X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 10 Sep 2026 17:02:09.3047 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 3bb48823-bc69-4af6-66aa-08df0f5d4036 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=[satlexmb07.amd.com] X-MS-Exchange-CrossTenant-AuthSource: CH1PEPF0000AD77.namprd04.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: DM4PR12MB6039 Introducing support for live update on AMD SEV-SNP platforms via DOWNLOAD_FIRMWARE_EX. This patchset is an extension of the RFC patchset from Tycho Andersen[1]. This series also fronts firmware_loader patches from Dan Williams[2] which majorly cleans up refcount issues so that registering the upload interface no longer pins the module. Without which having live firmware update will cause failure to reload the ccp module as well as break kexec. Patches based on cryptodev-2.6 RFC..v1: * firmware-loader patches are rebased as-is and only incorporates fixes for minor build issues * Dropped crypto/ccp: Hoist kernel part of SNP_PLATFORM_STATUS as that patch has been merged since * Dropped crypto/ccp: Reclaim command buffer when the PSP dies and subsequent handling since firmware quirk is now resolved and need not be handled in the OS * Use guard(mutex) for the locked region, which the split makes possible since sev_get_api_version() acquires sev_cmd_mutex - Maxwell * Added a patch factoring out the TMR and INIT_EX teardown, so the update path and __sev_firmware_shutdown() share it - Shantanu * Skip the re-init when the PSP is dead, not just when a rollback is outstanding - Shantanu * Re-initialize the platform before refreshing the cached status - Shantanu * Split the monolithic .write into a locked update helper, an error translation helper, and a thin .write that refreshes the cached status once the lock is dropped and clean up various allocations * Convert rollback required and reinit required globals to reside in sev_dev struct to avoid carrying over states if manually reloaded [1]: https://lore.kernel.org/all/20260430160716.1120553-1-tycho@kernel.org/ [2]: https://lore.kernel.org/lkml/20260331214726.903274-2-dan.j.williams@intel.com/ Dan Williams (3): firmware_loader: Stop pinning modules on registration firmware_loader: Stop pinning parent device per workqueue invocation treewide: firmware_loader: Drop the unused @module argument Pratik R. Sampat (4): crypto: ccp - Factor out the release of the SEV firmware buffers crypto: ccp - Allow SNP platform data to be queried after SNP INIT crypto/ccp: Register with fw_uploader and always fail crypto/ccp: Implement SNP Download Firmware EX .../driver-api/firmware/fw_upload.rst | 2 +- drivers/base/firmware_loader/sysfs_upload.c | 50 +- drivers/base/firmware_loader/sysfs_upload.h | 1 - drivers/crypto/ccp/sev-dev.c | 446 ++++++++++++++++-- drivers/crypto/ccp/sev-dev.h | 4 + drivers/cxl/core/memdev.c | 4 +- drivers/firmware/microchip/mpfs-auto-update.c | 2 +- drivers/fpga/intel-m10-bmc-sec-update.c | 4 +- drivers/greybus/gb-beagleplay.c | 2 +- drivers/media/i2c/thp7312.c | 2 +- drivers/net/pse-pd/pd692x0.c | 4 +- drivers/virt/coco/tdx-host/tdx-host.c | 4 +- include/linux/firmware.h | 15 +- include/linux/psp-sev.h | 19 + lib/test_firmware.c | 3 +- 15 files changed, 474 insertions(+), 88 deletions(-) -- 2.43.0