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| author | Nicholas Piggin <npiggin@gmail.com> | 2018-10-13 00:15:16 +1100 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2018-10-14 18:04:09 +1100 |
| commit | 4c2de74cc8696154b283f241d74ec0bb24438e22 (patch) | |
| tree | 85fe4333599db98756971f364ef4beb654abc162 /arch/powerpc/include/asm/perf_event_fsl_emb.h | |
| parent | 3eeacd9f4ea33546f272fcf131d6a11edbe3b4a6 (diff) | |
| download | talos-obmc-linux-4c2de74cc8696154b283f241d74ec0bb24438e22.tar.gz talos-obmc-linux-4c2de74cc8696154b283f241d74ec0bb24438e22.zip | |
powerpc/64: Interrupts save PPR on stack rather than thread_struct
PPR is the odd register out when it comes to interrupt handling, it is
saved in current->thread.ppr while all others are saved on the stack.
The difficulty with this is that accessing thread.ppr can cause a SLB
fault, but the SLB fault handler implementation in C change had
assumed the normal exception entry handlers would not cause an SLB
fault.
Fix this by allocating room in the interrupt stack to save PPR.
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Diffstat (limited to 'arch/powerpc/include/asm/perf_event_fsl_emb.h')
0 files changed, 0 insertions, 0 deletions
