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powerpc: Program HPTE key protection bits

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Map the PTE protection key bits to the HPTE key protection bits,
while creating HPTE  entries.

Acked-by: Balbir Singh <bsingharora@gmail.com>
Signed-off-by: Ram Pai <linuxram@us.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
This commit is contained in:
Ram Pai
2018-01-18 17:50:36 -08:00
committed by Michael Ellerman
parent eb95d016ce
commit a6590ca55f
4 changed files with 21 additions and 0 deletions
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9
arch/powerpc/include/asm/pkeys.h
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@@ -62,6 +62,15 @@ static inline int vma_pkey(struct vm_area_struct *vma)
#define arch_max_pkey() pkeys_total
static inline u64 pte_to_hpte_pkey_bits(u64 pteflags)
{
return (((pteflags & H_PTE_PKEY_BIT0) ? HPTE_R_KEY_BIT0 : 0x0UL) |
((pteflags & H_PTE_PKEY_BIT1) ? HPTE_R_KEY_BIT1 : 0x0UL) |
((pteflags & H_PTE_PKEY_BIT2) ? HPTE_R_KEY_BIT2 : 0x0UL) |
((pteflags & H_PTE_PKEY_BIT3) ? HPTE_R_KEY_BIT3 : 0x0UL) |
((pteflags & H_PTE_PKEY_BIT4) ? HPTE_R_KEY_BIT4 : 0x0UL));
}
#define pkey_alloc_mask(pkey) (0x1 << pkey)
#define mm_pkey_allocation_map(mm) (mm->context.pkey_allocation_map)