ARM: 9198/1: spectre-bhb: simplify BPIALL vector macro

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The BPIALL mitigation for Spectre-BHB adds a single instruction to the
handler sequence that doesn't clobber any registers. Given that these
sequences are 10 instructions long, they don't fit neatly into a
cacheline anyway, so we can simply move that single instruction to the
start of the unmitigated one, and rearrange the symbol names accordingly.

Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
Signed-off-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>

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Ard Biesheuvel 2022-04-20 09:55:35 +01:00 • committed by Russell King (Oracle)

parent 508074607c

commit c4f486f1e7

1 changed files with 6 additions and 15 deletions

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arch/arm/kernel/entry-armv.S

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