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x86/copy_mc: Use EX_TYPE_DEFAULT_MCE_SAFE for exception fixups

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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@linutronix.de>
Signed-off-by: Borislav Petkov <bp@suse.de>
Link: https://lkml.kernel.org/r/20210908132525.328706042@linutronix.de
This commit is contained in:
Thomas Gleixner 2021-09-08 15:29:21 +02:00 committed by Borislav Petkov
parent 2cadf5248b
commit c1c97d1754
1 changed files with 4 additions and 4 deletions
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8
arch/x86/lib/copy_mc_64.S
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@ -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 */