diff options
| author |   Nicholas Piggin <npiggin@gmail.com> | 2018-10-03 00:27:59 +1000 |
|---|---|---|
| committer |   Michael Ellerman <mpe@ellerman.id.au> | 2018-10-14 18:04:09 +1100 |
| commit | e15a4fea4dee2771c6989862527546b2b3326799 (patch) | |
| tree | 4b72c1e73035e40274e5c79f3b81766af4831462 /arch/powerpc/include/asm | |
| parent | powerpc/64s/hash: Simplify slb_flush_and_rebolt() (diff) | |
| download | linux-dev-e15a4fea4dee2771c6989862527546b2b3326799.tar.xz linux-dev-e15a4fea4dee2771c6989862527546b2b3326799.zip | |
powerpc/64s/hash: Add some SLB debugging tests
This adds CONFIG_DEBUG_VM checks to ensure:
- The kernel stack is in the SLB after it's flushed and bolted.
- We don't insert an SLB for an address that is aleady in the SLB.
- The kernel SLB miss handler does not take an SLB miss.
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Diffstat (limited to 'arch/powerpc/include/asm')
| -rw-r--r-- | arch/powerpc/include/asm/paca.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/arch/powerpc/include/asm/paca.h b/arch/powerpc/include/asm/paca.h index 97e8a57a4998..e843bc5d1a0f 100644 --- a/arch/powerpc/include/asm/paca.h +++ b/arch/powerpc/include/asm/paca.h @@ -115,6 +115,9 @@ struct paca_struct { u16 vmalloc_sllp; u8 slb_cache_ptr; u8 stab_rr; /* stab/slb round-robin counter */ +#ifdef CONFIG_DEBUG_VM + u8 in_kernel_slb_handler; +#endif u32 slb_used_bitmap; /* Bitmaps for first 32 SLB entries. */ u32 slb_kern_bitmap; u32 slb_cache[SLB_CACHE_ENTRIES]; |