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CTRY:US; LANG:en; SCL:1; SRV:; IPV:CAL; SFV:NSPM; H:SATLEXMB04.amd.com; PTR:InfoDomainNonexistent; CAT:NONE; SFS:(13230040)(376014)(7416014)(82310400026)(36860700013)(1800799024)(921020); DIR:OUT; SFP:1101; X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 09 Dec 2024 23:26:30.7586 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 34a8658f-cbee-48d1-c3e8-08dd18a8e98c 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: SA2PEPF00003F64.namprd04.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: DS7PR12MB9526 From: Ashish Kalra Remove platform initialization of SEV/SNP from PSP driver probe time and move it to KVM module load time so that KVM can do SEV/SNP platform initialization explicitly if it actually wants to use SEV/SNP functionality. With this patch, KVM will explicitly call into the PSP driver at load time to initialize SEV/SNP by default but this behavior can be altered with KVM module parameters to not do SEV/SNP platform initialization at module load time if required. Additionally SEV/SNP platform shutdown is invoked during KVM module unload time. Signed-off-by: Ashish Kalra --- arch/x86/kvm/svm/sev.c | 11 +++++++++++ 1 file changed, 11 insertions(+) diff --git a/arch/x86/kvm/svm/sev.c b/arch/x86/kvm/svm/sev.c index 72674b8825c4..ffb5c907c5bb 100644 --- a/arch/x86/kvm/svm/sev.c +++ b/arch/x86/kvm/svm/sev.c @@ -2966,6 +2966,7 @@ void __init sev_set_cpu_caps(void) void __init sev_hardware_setup(void) { unsigned int eax, ebx, ecx, edx, sev_asid_count, sev_es_asid_count; + struct sev_platform_init_args init_args = {0}; bool sev_snp_supported = false; bool sev_es_supported = false; bool sev_supported = false; @@ -3082,6 +3083,13 @@ void __init sev_hardware_setup(void) sev_supported_vmsa_features = 0; if (sev_es_debug_swap_enabled) sev_supported_vmsa_features |= SVM_SEV_FEAT_DEBUG_SWAP; + + if (!sev_enabled) + return; + + /* Do SEV/SNP INIT */ + init_args.probe = true; + sev_platform_init(&init_args); } void sev_hardware_unsetup(void) @@ -3097,6 +3105,9 @@ void sev_hardware_unsetup(void) misc_cg_set_capacity(MISC_CG_RES_SEV, 0); misc_cg_set_capacity(MISC_CG_RES_SEV_ES, 0); + + /* Do SEV/SNP Shutdown */ + sev_platform_shutdown(); } int sev_cpu_init(struct svm_cpu_data *sd)