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| author | Michael Ellerman <mpe@ellerman.id.au> | 2018-10-02 23:56:39 +1000 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2018-10-03 15:32:49 +1000 |
| commit | 54be0b9c7c9888ebe63b89a31a17ee3df6a68d61 (patch) | |
| tree | 12870e5fff70fc0676b5a63719beca3b1d1896a5 /arch/powerpc/include/asm/exception-64s.h | |
| parent | 0823c68b054bca9dc321adea829af5cf36afb30b (diff) | |
| download | linux-54be0b9c7c9888ebe63b89a31a17ee3df6a68d61.tar.bz2 | |
Revert "convert SLB miss handlers to C" and subsequent commits
This reverts commits:
5e46e29e6a97 ("powerpc/64s/hash: convert SLB miss handlers to C")
8fed04d0f6ae ("powerpc/64s/hash: remove user SLB data from the paca")
655deecf67b2 ("powerpc/64s/hash: SLB allocation status bitmaps")
2e1626744e8d ("powerpc/64s/hash: provide arch_setup_exec hooks for hash slice setup")
89ca4e126a3f ("powerpc/64s/hash: Add a SLB preload cache")
This series had a few bugs, and the fixes are not all trivial. So
revert most of it for now.
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Diffstat (limited to 'arch/powerpc/include/asm/exception-64s.h')
| -rw-r--r-- | arch/powerpc/include/asm/exception-64s.h | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/arch/powerpc/include/asm/exception-64s.h b/arch/powerpc/include/asm/exception-64s.h index 47578b79f0fb..a86feddddad0 100644 --- a/arch/powerpc/include/asm/exception-64s.h +++ b/arch/powerpc/include/asm/exception-64s.h @@ -61,6 +61,14 @@ #define MAX_MCE_DEPTH 4 /* + * EX_LR is only used in EXSLB and where it does not overlap with EX_DAR + * EX_CCR similarly with DSISR, but being 4 byte registers there is a hole + * in the save area so it's not necessary to overlap them. Could be used + * for future savings though if another 4 byte register was to be saved. + */ +#define EX_LR EX_DAR + +/* * EX_R3 is only used by the bad_stack handler. bad_stack reloads and * saves DAR from SPRN_DAR, and EX_DAR is not used. So EX_R3 can overlap * with EX_DAR. |