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Kim Phillips a586788a66 x86/sev: Allow IBPB-on-Entry feature for SNP guests ... commit 9073428bb2 upstream. The SEV-SNP IBPB-on-Entry feature does not require a guest-side implementation. It was added in Zen5 h/w, after the first SNP Zen implementation, and thus was not accounted for when the initial set of SNP features were added to the kernel. In its abundant precaution, commit 8c29f01654 ("x86/sev: Add SEV-SNP guest feature negotiation support") included SEV_STATUS' IBPB-on-Entry bit as a reserved bit, thereby masking guests from using the feature. Allow guests to make use of IBPB-on-Entry when supported by the hypervisor, as the bit is now architecturally defined and safe to expose. Fixes: 8c29f01654 ("x86/sev: Add SEV-SNP guest feature negotiation support") Signed-off-by: Kim Phillips <kim.phillips@amd.com> Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de> Reviewed-by: Nikunj A Dadhania <nikunj@amd.com> Reviewed-by: Tom Lendacky <thomas.lendacky@amd.com> Cc: stable@kernel.org Link: https://patch.msgid.link/20260203222405.4065706-2-kim.phillips@amd.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		History 2026-03-12 07:09:37 -04:00
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sev	x86/sev: Allow IBPB-on-Entry feature for SNP guests	2026-03-12 07:09:37 -04:00
tdx	x86/tdx: tdx_mcall_get_report0: Return -EBUSY on TDCALL_OPERAND_BUSY error	2025-05-08 19:17:43 -07:00
core.c	x86/apic: Add new driver for Secure AVIC	2025-08-28 17:57:19 +02:00
Makefile	x86/sev: Move SEV compilation units	2024-07-11 11:55:58 +02:00