Messages in this thread |  | | Date | Wed, 21 May 2025 19:44:06 -0700 | | From | Pawan Gupta <> | | Subject | [PATCH v2 0/7] eIBRS fixes |
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v2: - Split the ITS stuffing patch into smaller patches. (Borislav) - Zap spectre_v2_in_retpoline_mode() helper. (Borislav)
v1: https://lore.kernel.org/r/20250520-eibrs-fix-v1-2-91bacd35ed09@linux.intel.com
tip/x86/core that has the restructured bugs.c including the recent ITS mitigation has some disparities compared to upstream:
1. Spectre-v2 mitigation default is IBRS on eIBRS supported systems. 2. RSB stuffing mitigation for ITS is not allowed with eIBRS.
These couple of patches fixes the above issues.
Signed-off-by: Pawan Gupta <pawan.kumar.gupta@linux.intel.com> --- Pawan Gupta (7): x86/retbleed: Check for AUTO in all cases x86/retbleed: Simplify the =stuff checks x86/bugs: Exit early if return thunk is already set x86/its: Use switch/case to apply mitigation x86/retbleed: Introduce cdt_possible() x86/its: Remove =stuff dependency on retbleed x86/its: Allow stuffing in eIBRS+retpoline mode also
arch/x86/kernel/cpu/bugs.c | 82 +++++++++++++++++++++++++++------------------- 1 file changed, 48 insertions(+), 34 deletions(-) --- base-commit: 6a7c3c2606105a41dde81002c0037420bc1ddf00 change-id: 20250520-eibrs-fix-6c452b697dbf
-- Thanks, Pawan
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