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powerpc/64s/hash: provide arch_setup_exec hooks for hash slice setup

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This will be used by the SLB code in the next patch, but for now this
sets the slb_addr_limit to the correct size for 32-bit tasks.

Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
This commit is contained in:
Nicholas Piggin
2018-09-15 01:30:55 +10:00
committed by Michael Ellerman
parent e83cbf7fb7
commit 2e1626744e
6 changed files with 37 additions and 0 deletions
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14
arch/powerpc/mm/slice.c
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@@ -746,6 +746,20 @@ void slice_init_new_context_exec(struct mm_struct *mm)
bitmap_fill(mask->high_slices, SLICE_NUM_HIGH);
}
#ifdef CONFIG_PPC_BOOK3S_64
void slice_setup_new_exec(void)
{
struct mm_struct *mm = current->mm;
slice_dbg("slice_setup_new_exec(mm=%p)\n", mm);
if (!is_32bit_task())
return;
mm->context.slb_addr_limit = DEFAULT_MAP_WINDOW;
}
#endif
void slice_set_range_psize(struct mm_struct *mm, unsigned long start,
unsigned long len, unsigned int psize)
{