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| author | Aneesh Kumar K.V | 2016-04-29 15:26:09 +0200 |
|---|---|---|
| committer | Michael Ellerman | 2016-05-11 13:53:46 +0200 |
| commit | 764041e0f43cc7846f6d8eb246d65b53cc06c764 (patch) | |
| tree | 1930ed5310ec45c5044e7deef802700c3dcb6e5d /arch/powerpc/mm/slice.c | |
| parent | powerpc/mm/radix: Isolate hash table function from pseries guest code (diff) | |
| download | kernel-qcow2-linux-764041e0f43cc7846f6d8eb246d65b53cc06c764.tar.gz kernel-qcow2-linux-764041e0f43cc7846f6d8eb246d65b53cc06c764.tar.xz kernel-qcow2-linux-764041e0f43cc7846f6d8eb246d65b53cc06c764.zip | |
powerpc/mm/radix: Add checks in slice code to catch radix usage
Radix doesn't need slice support. Catch incorrect usage of slice code
when radix is enabled.
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Diffstat (limited to 'arch/powerpc/mm/slice.c')
| -rw-r--r-- | arch/powerpc/mm/slice.c | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/arch/powerpc/mm/slice.c b/arch/powerpc/mm/slice.c index ee21b8699cee..2b27458902ee 100644 --- a/arch/powerpc/mm/slice.c +++ b/arch/powerpc/mm/slice.c @@ -395,6 +395,7 @@ unsigned long slice_get_unmapped_area(unsigned long addr, unsigned long len, /* Sanity checks */ BUG_ON(mm->task_size == 0); + VM_BUG_ON(radix_enabled()); slice_dbg("slice_get_unmapped_area(mm=%p, psize=%d...\n", mm, psize); slice_dbg(" addr=%lx, len=%lx, flags=%lx, topdown=%d\n", @@ -568,6 +569,16 @@ unsigned int get_slice_psize(struct mm_struct *mm, unsigned long addr) unsigned char *hpsizes; int index, mask_index; + /* + * Radix doesn't use slice, but can get enabled along with MMU_SLICE + */ + if (radix_enabled()) { +#ifdef CONFIG_PPC_64K_PAGES + return MMU_PAGE_64K; +#else + return MMU_PAGE_4K; +#endif + } if (addr < SLICE_LOW_TOP) { u64 lpsizes; lpsizes = mm->context.low_slices_psize; @@ -605,6 +616,7 @@ void slice_set_user_psize(struct mm_struct *mm, unsigned int psize) slice_dbg("slice_set_user_psize(mm=%p, psize=%d)\n", mm, psize); + VM_BUG_ON(radix_enabled()); spin_lock_irqsave(&slice_convert_lock, flags); old_psize = mm->context.user_psize; @@ -649,6 +661,7 @@ void slice_set_range_psize(struct mm_struct *mm, unsigned long start, { struct slice_mask mask = slice_range_to_mask(start, len); + VM_BUG_ON(radix_enabled()); slice_convert(mm, mask, psize); } @@ -678,6 +691,9 @@ int is_hugepage_only_range(struct mm_struct *mm, unsigned long addr, struct slice_mask mask, available; unsigned int psize = mm->context.user_psize; + if (radix_enabled()) + return 0; + mask = slice_range_to_mask(addr, len); available = slice_mask_for_size(mm, psize); #ifdef CONFIG_PPC_64K_PAGES |