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| author | Mahesh Salgaonkar <mahesh@linux.vnet.ibm.com> | 2013-10-30 20:04:40 +0530 |
|---|---|---|
| committer | Benjamin Herrenschmidt <benh@kernel.crashing.org> | 2013-12-05 16:04:37 +1100 |
| commit | 4c703416efc0a23f83a282b9240bb92fbd9e0be9 (patch) | |
| tree | 3f1d19710be847410ed2690626542977b614ca63 /arch/powerpc/kernel/traps.c | |
| parent | 1c51089f777bf357487668be9621292cfed752bd (diff) | |
| download | lwn-4c703416efc0a23f83a282b9240bb92fbd9e0be9.tar.gz lwn-4c703416efc0a23f83a282b9240bb92fbd9e0be9.zip | |
powerpc/book3s: Introduce a early machine check hook in cpu_spec.
This patch adds the early machine check function pointer in cputable for
CPU specific early machine check handling. The early machine handle routine
will be called in real mode to handle SLB and TLB errors. We can not reuse
the existing machine_check hook because it is always invoked in kernel
virtual mode and we would already be in trouble if we get SLB or TLB errors.
This patch just sets up a mechanism to invoke CPU specific handler. The
subsequent patches will populate the function pointer.
Signed-off-by: Mahesh Salgaonkar <mahesh@linux.vnet.ibm.com>
Acked-by: Paul Mackerras <paulus@samba.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Diffstat (limited to 'arch/powerpc/kernel/traps.c')
| -rw-r--r-- | arch/powerpc/kernel/traps.c | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/arch/powerpc/kernel/traps.c b/arch/powerpc/kernel/traps.c index 97a1ce72e130..330841766b09 100644 --- a/arch/powerpc/kernel/traps.c +++ b/arch/powerpc/kernel/traps.c @@ -293,8 +293,11 @@ void system_reset_exception(struct pt_regs *regs) */ long machine_check_early(struct pt_regs *regs) { - /* TODO: handle/decode machine check reason */ - return 0; + long handled = 0; + + if (cur_cpu_spec && cur_cpu_spec->machine_check_early) + handled = cur_cpu_spec->machine_check_early(regs); + return handled; } #endif |