Nikunj A Dadhania 3645eb7e39 x86/fred: Fix early boot failures on SEV-ES/SNP guests ... FRED-enabled SEV-(ES,SNP) guests fail to boot due to the following issues in the early boot sequence: * FRED does not have a #VC exception handler in the dispatch logic * Early FRED #VC exceptions attempt to use uninitialized per-CPU GHCBs instead of boot_ghcb Add X86_TRAP_VC case to fred_hwexc() with a new exc_vmm_communication() function that provides the unified entry point FRED requires, dispatching to existing user/kernel handlers based on privilege level. The function is already declared via DECLARE_IDTENTRY_VC(). Fix early GHCB access by falling back to boot_ghcb in __sev_{get,put}_ghcb() when per-CPU GHCBs are not yet initialized. Fixes: 14619d912b ("x86/fred: FRED entry/exit and dispatch code") Signed-off-by: Nikunj A Dadhania <nikunj@amd.com> Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de> Reviewed-by: Tom Lendacky <thomas.lendacky@amd.com> Cc: <stable@kernel.org> # 6.12+ Link: https://patch.msgid.link/20260318075654.1792916-4-nikunj@amd.com		2026-03-23 14:18:18 +01:00
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core.c	x86/sev: Allow IBPB-on-Entry feature for SNP guests	2026-03-02 11:08:59 +01:00
internal.h	x86/sev: Rename sev_es_ghcb_handle_msr() to __vc_handle_msr()	2026-01-19 15:23:48 +01:00
Makefile	- Make the SEV internal header really internal and carve out the SVSM-specific	2026-02-10 19:19:06 -08:00
noinstr.c	x86/fred: Fix early boot failures on SEV-ES/SNP guests	2026-03-23 14:18:18 +01:00
svsm.c	x86/sev: Carve out the SVSM code into a separate compilation unit	2025-12-31 13:18:23 +01:00
vc-handle.c	x86/sev: Rename sev_es_ghcb_handle_msr() to __vc_handle_msr()	2026-01-19 15:23:48 +01:00
vc-shared.c	x86/coco/sev: Convert has_cpuflag() to use cpu_feature_enabled()	2025-11-11 16:42:31 +01:00