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X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: 17EcrDWbr00zl5+ZYx407UjljYkQaMCyaqhrpD4kZZCm4sqZXNzMcaGlWSjiO+efYthvi7qITDCfSnyUCYbKlGbxI3q4utbEcMe1KCfdZsa/0Rygi3q/bBClOrMs8wN+6lyGCpN8GM+HpzDmSTE/yJ0YX59YjAmU+aPOCzcV/qeHVpYVf48b7/2A5vTHwtVCcfCj5zPjk295BMeKCHgjO6z7ibMhMBIxbLUdBXB8xikxtQGXR4tLPXmvsvaw3rjfcPtWJtmyvMpBGqWVOSuybqO8IfDSozPnGQczvjzpx49cI79JVrrYI1b3T/pe4uPeR53RJYY8hDNQO+buuU5AuLOxoLmJQ2nX7p75BzkGMLNTfltyKcrW+ftoraisYZUkhUa1I7hUOk8nO+YiL6sb92tIYZXeu/93WDY1GemwUsrUgaYuRYb1TfekLScvE4LZ X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 26 Feb 2026 09:24:31.2924 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 1ea88447-e582-4fb2-b92e-08de7518d8fc 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: BL02EPF0001A0FB.namprd03.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: DS0PR12MB8367 SEV-ES and SNP guests fail to boot when FRED is enabled due to missing #VC exception handling and a CR-pinning issue that prematurely enables FRED before its MSRs are configured. Patch 1 fixes the CR-pinning issue by deferring enforcement during secondary CPU bringup, preventing FRED from being enabled before it is configured and able to handle exceptions. Patch 2 adds #VC exception handling to FRED and fixes early GHCB access to use boot_ghcb before per-CPU GHCBs are initialized. These fixes enable SEV-ES/SNP guests to boot successfully with FRED enabled. Changelog: v1 -> v2: * Instead of moving pr_info(), fix the root cause by disabling CR pinning during secondary CPU bringup (Dave Hansen) * Use unified #VC exception handler in fred_hwexc() (Dave Hansen) * Collect RoB (Sohil Mehta) v1: https://lore.kernel.org/kvm/20260205051030.1225975-1-nikunj@amd.com/ Dave Hansen (1): x86/cpu: Disable CR pinning during CPU bringup Nikunj A Dadhania (1): x86/fred: Fix early boot failures on SEV-ES/SNP guests arch/x86/coco/sev/noinstr.c | 6 ++++++ arch/x86/entry/entry_fred.c | 14 ++++++++++++++ arch/x86/kernel/cpu/common.c | 23 +++++++++++++++++++---- 3 files changed, 39 insertions(+), 4 deletions(-) base-commit: 7e8eff12c150f3bc24f0faac42e3a62a8fad751d -- 2.48.1