android/android_kernel_xiaomi_sm8450
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

ARM: fix Thumb2 regression with Spectre BHB

Browse Source 
commit 6c7cb60bff7aec24b834343ff433125f469886a3 upstream.

When building for Thumb2, the vectors make use of a local label. Sadly,
the Spectre BHB code also uses a local label with the same number which
results in the Thumb2 reference pointing at the wrong place. Fix this
by changing the number used for the Spectre BHB local label.

Fixes: b9baf5c8c5c3 ("ARM: Spectre-BHB workaround")
Tested-by: Nathan Chancellor <nathan@kernel.org>
Signed-off-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Russell King (Oracle)
2022-03-11 17:13:17 +00:00
committed by Greg Kroah-Hartman
parent 6b1249db9e
commit 8bb5b72dbd
1 changed files with 2 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
arch/arm/kernel/entry-armv.S
View File

@ -1043,9 +1043,9 @@ vector_bhb_loop8_\name:
@ bhb workaround
mov r0, #8
1: b . + 4
3: b . + 4
subs r0, r0, #1
bne 1b
bne 3b
dsb
isb
b 2b