From: Pawan Gupta <pawan.kumar.gupta@linux.intel.com>
To: x86@kernel.org
Cc: David Kaplan <david.kaplan@amd.com>,
linux-kernel@vger.kernel.org, "H. Peter Anvin" <hpa@zytor.com>,
Josh Poimboeuf <jpoimboe@kernel.org>
Subject: [PATCH 0/2] eIBRS fixes
Date: Tue, 20 May 2025 22:35:04 -0700 [thread overview]
Message-ID: <20250520-eibrs-fix-v1-0-91bacd35ed09@linux.intel.com> (raw)
Hi,
tip/x86/core that has restructured bugs.c including the recent ITS
mitigation has some disparities compared to upstream:
1. Spectre-v2 mitigation defaults to 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 (2):
x86/spectre_v2: Fix mitigation default on Intel
x86/its: Allow "=stuff" mitigation when eIBRS is enabled
arch/x86/kernel/cpu/bugs.c | 104 ++++++++++++++++++++++++++++++---------------
1 file changed, 69 insertions(+), 35 deletions(-)
---
base-commit: 8c57ca583ebfe879f99007d10c8f2b66baa18422
change-id: 20250520-eibrs-fix-6c452b697dbf
--
Thanks,
Pawan
next reply other threads:[~2025-05-21 5:35 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-05-21 5:35 Pawan Gupta [this message]
2025-05-21 5:35 ` [PATCH 1/2] x86/spectre_v2: Fix mitigation default on Intel Pawan Gupta
2025-05-21 10:03 ` [tip: x86/core] x86/bugs: Fix spectre_v2 " tip-bot2 for Pawan Gupta
2025-05-21 5:35 ` [PATCH 2/2] x86/its: Allow "=stuff" mitigation when eIBRS is enabled Pawan Gupta
2025-05-21 9:59 ` Borislav Petkov
2025-05-21 16:44 ` Pawan Gupta
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