linux-kernel - [PATCH v3 0/2] CALL

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Message-ID: <20250228-call-nospec-v3-0-96599fed0f33@linux.intel.com>
Date: Fri, 28 Feb 2025 18:35:27 -0800
From: Pawan Gupta <pawan.kumar.gupta@...ux.intel.com>
To: x86@...nel.org, Josh Poimboeuf <jpoimboe@...nel.org>,
	Andrew Cooper <andrew.cooper3@...rix.com>
Cc: linux-kernel@...r.kernel.org
Subject: [PATCH v3 0/2] CALL_NOSPEC fixes

v3:
- Split the CS prefix change into a separate patch. (Ingo)

v2: https://lore.kernel.org/r/20250227-call-nospec-v2-1-895a30dceaac@linux.intel.com
- Fixed the inconsistency in the use of "\" in __CS_PREFIX. (Andrew)
- Fixed the comment to reflect that __CS_PREFIX only emits the prefix and
  not the JMP/CALL. (Andrew)

v1: https://lore.kernel.org/r/20250226-call-nospec-v1-1-4dde04a5c7a7@linux.intel.com

Patch 1 simplifies CALL_NOSPEC and mimics the behavior of compiler induced
thunks.

Patch 2	adds a missing CS prefix in CALL_NOSPEC for inline asm.

---
Pawan Gupta (2):
      x86/speculation: Simplify and make CALL_NOSPEC consistent
      x86/speculation: Add a conditional CS prefix to CALL_NOSPEC

 arch/x86/include/asm/nospec-branch.h | 32 +++++++++++++++++++-------------
 1 file changed, 19 insertions(+), 13 deletions(-)
---
base-commit: d082ecbc71e9e0bf49883ee4afd435a77a5101b6
change-id: 20250226-call-nospec-b94808f0dc75

Best regards,
-- 
Pawan