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| author | Nicholas Piggin <npiggin@gmail.com> | 2016-12-20 04:30:05 +1000 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2017-04-28 21:02:25 +1000 |
| commit | c4f3b52ce7b16824befb16ab3d045c891b08b7db (patch) | |
| tree | 92f77ba25144dbe046368583e18e21c83015e642 /arch/powerpc/kernel/asm-offsets.c | |
| parent | a3d96f70c14773d0928c6a54fd278138f0868572 (diff) | |
| download | linux-c4f3b52ce7b16824befb16ab3d045c891b08b7db.tar.gz linux-c4f3b52ce7b16824befb16ab3d045c891b08b7db.tar.bz2 linux-c4f3b52ce7b16824befb16ab3d045c891b08b7db.zip | |
powerpc/64s: Disallow system reset vs system reset reentrancy
In preparation for using a dedicated stack for system reset interrupts,
prevent a nested system reset from recovering, in order to simplify
code that is called in crash/debug path. This allows a system reset
interrupt to just use the base stack pointer.
Keep an in_nmi nesting counter similarly to the in_mce counter. Consider
the interrrupt non-recoverable if it is taken inside another system
reset.
Interrupt nesting could be allowed similarly to MCE, but system reset
is a special case that's not for normal operation, so simplicity wins
until there is requirement for nested system reset interrupts.
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 46732ee70b43..1466e96d36cf 100644 --- a/arch/powerpc/kernel/asm-offsets.c +++ b/arch/powerpc/kernel/asm-offsets.c @@ -235,6 +235,7 @@ int main(void) #ifdef CONFIG_PPC_BOOK3S_64 OFFSET(PACAMCEMERGSP, paca_struct, mc_emergency_sp); OFFSET(PACA_IN_MCE, paca_struct, in_mce); + OFFSET(PACA_IN_NMI, paca_struct, in_nmi); #endif OFFSET(PACAHWCPUID, paca_struct, hw_cpu_id); OFFSET(PACAKEXECSTATE, paca_struct, kexec_state); |