linux-kernel - [tip: x86/fpu] x86/copy_mc: Use EX_TYPE_DEFAULT_MCE

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Message-ID: <163164717324.25758.15335402761994077440.tip-bot2@tip-bot2>
Date:   Tue, 14 Sep 2021 19:19:33 -0000
From:   "tip-bot2 for Thomas Gleixner" <tip-bot2@...utronix.de>
To:     linux-tip-commits@...r.kernel.org
Cc:     Thomas Gleixner <tglx@...utronix.de>, Borislav Petkov <bp@...e.de>,
        x86@...nel.org, linux-kernel@...r.kernel.org
Subject: [tip: x86/fpu] x86/copy_mc: Use EX_TYPE_DEFAULT_MCE_SAFE for exception fixups

The following commit has been merged into the x86/fpu branch of tip:

Commit-ID:     c1c97d175493ab32325df81133611ce8e4e05088
Gitweb:        https://git.kernel.org/tip/c1c97d175493ab32325df81133611ce8e4e05088
Author:        Thomas Gleixner <tglx@...utronix.de>
AuthorDate:    Wed, 08 Sep 2021 15:29:21 +02:00
Committer:     Borislav Petkov <bp@...e.de>
CommitterDate: Mon, 13 Sep 2021 18:11:09 +02:00

x86/copy_mc: Use EX_TYPE_DEFAULT_MCE_SAFE for exception fixups

Nothing in that code uses the trap number which was stored by the exception
fixup which is instantiated via _ASM_EXTABLE_FAULT().

Use _ASM_EXTABLE(... EX_TYPE_DEFAULT_MCE_SAFE) instead which just handles
the IP fixup and the type indicates to the #MC handler that the call site
can handle the abort caused by #MC correctly.

Signed-off-by: Thomas Gleixner <tglx@...utronix.de>
Signed-off-by: Borislav Petkov <bp@...e.de>
Link: https://lkml.kernel.org/r/20210908132525.328706042@linutronix.de
---
 arch/x86/lib/copy_mc_64.S | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/arch/x86/lib/copy_mc_64.S b/arch/x86/lib/copy_mc_64.S
index e5f77e2..7334055 100644
--- a/arch/x86/lib/copy_mc_64.S
+++ b/arch/x86/lib/copy_mc_64.S
@@ -107,9 +107,9 @@ SYM_FUNC_END(copy_mc_fragile)
 
 	.previous
 
-	_ASM_EXTABLE_FAULT(.L_read_leading_bytes, .E_leading_bytes)
-	_ASM_EXTABLE_FAULT(.L_read_words, .E_read_words)
-	_ASM_EXTABLE_FAULT(.L_read_trailing_bytes, .E_trailing_bytes)
+	_ASM_EXTABLE_TYPE(.L_read_leading_bytes, .E_leading_bytes, EX_TYPE_DEFAULT_MCE_SAFE)
+	_ASM_EXTABLE_TYPE(.L_read_words, .E_read_words, EX_TYPE_DEFAULT_MCE_SAFE)
+	_ASM_EXTABLE_TYPE(.L_read_trailing_bytes, .E_trailing_bytes, EX_TYPE_DEFAULT_MCE_SAFE)
 	_ASM_EXTABLE(.L_write_leading_bytes, .E_leading_bytes)
 	_ASM_EXTABLE(.L_write_words, .E_write_words)
 	_ASM_EXTABLE(.L_write_trailing_bytes, .E_trailing_bytes)
@@ -149,5 +149,5 @@ SYM_FUNC_END(copy_mc_enhanced_fast_string)
 
 	.previous
 
-	_ASM_EXTABLE_FAULT(.L_copy, .E_copy)
+	_ASM_EXTABLE_TYPE(.L_copy, .E_copy, EX_TYPE_DEFAULT_MCE_SAFE)
 #endif /* !CONFIG_UML */