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| author | Nicholas Piggin <npiggin@gmail.com> | 2016-12-19 19:30:06 +0100 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2017-04-28 13:02:25 +0200 |
| commit | b1ee8a3de5790777f325416ad97340428d8ae25f (patch) | |
| tree | 7fb570821268ff0eab738759eb345b85bc7df179 /arch/powerpc/kernel/asm-offsets.c | |
| parent | powerpc/64s: Disallow system reset vs system reset reentrancy (diff) | |
| download | linux-b1ee8a3de5790777f325416ad97340428d8ae25f.tar.xz linux-b1ee8a3de5790777f325416ad97340428d8ae25f.zip | |
powerpc/64s: Dedicated system reset interrupt stack
The system reset interrupt is used for crash/debug situations, so it is
desirable to have as little impact on the normal state of the system as
possible.
Currently it uses the current kernel stack to process the exception.
This stores into the stack which may be involved with the crash. The
stack pointer may be corrupted, or it may have overflowed.
Avoid or minimise these problems by creating a dedicated NMI stack for
the system reset interrupt to use.
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Diffstat (limited to 'arch/powerpc/kernel/asm-offsets.c')
| -rw-r--r-- | arch/powerpc/kernel/asm-offsets.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/powerpc/kernel/asm-offsets.c b/arch/powerpc/kernel/asm-offsets.c index 1466e96d36cf..439c257dec4a 100644 --- a/arch/powerpc/kernel/asm-offsets.c +++ b/arch/powerpc/kernel/asm-offsets.c @@ -234,6 +234,7 @@ int main(void) OFFSET(PACAEMERGSP, paca_struct, emergency_sp); #ifdef CONFIG_PPC_BOOK3S_64 OFFSET(PACAMCEMERGSP, paca_struct, mc_emergency_sp); + OFFSET(PACA_NMI_EMERG_SP, paca_struct, nmi_emergency_sp); OFFSET(PACA_IN_MCE, paca_struct, in_mce); OFFSET(PACA_IN_NMI, paca_struct, in_nmi); #endif |