luck/tmp_suning_uos_patched
1
0
Fork 1
Code Issues Pull Requests Packages Projects Releases Wiki Activity

powerpc/64s/kuap: Restore AMR in system reset exception

Browse Source 
The system reset interrupt handler locks AMR and exits with
EXCEPTION_RESTORE_REGS without restoring AMR. Similarly to the
soft-NMI handler, it needs to restore.

Fixes: 890274c2dc ("powerpc/64s: Implement KUAP for Radix MMU")
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20200429065654.1677541-5-npiggin@gmail.com
This commit is contained in:
Nicholas Piggin 2020-04-29 16:56:52 +10:00 committed by Michael Ellerman
parent c0d7dcf89e
commit 53459dc970
1 changed files with 1 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
arch/powerpc/kernel/exceptions-64s.S
View File

@ -971,6 +971,7 @@ EXC_COMMON_BEGIN(system_reset_common)
ld r10,SOFTE(r1)
stb r10,PACAIRQSOFTMASK(r13)
kuap_restore_amr r10
EXCEPTION_RESTORE_REGS
RFI_TO_USER_OR_KERNEL