diff options
| author | Ram Pai <linuxram@us.ibm.com> | 2018-01-19 04:50:37 +0300 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2018-01-20 14:59:03 +0300 |
| commit | f2407ef3ba225665ee24965f69bc84435fb590cf (patch) | |
| tree | 5883038293a5e98317f3cd8bf161f62493cd6926 /arch/powerpc/include/asm/pkeys.h | |
| parent | a6590ca55f1f49912e17e4811ccae9a51bda8859 (diff) | |
| download | linux-f2407ef3ba225665ee24965f69bc84435fb590cf.tar.xz | |
powerpc: helper to validate key-access permissions of a pte
helper function that checks if the read/write/execute is allowed
on the pte.
Signed-off-by: Ram Pai <linuxram@us.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Diffstat (limited to 'arch/powerpc/include/asm/pkeys.h')
| -rw-r--r-- | arch/powerpc/include/asm/pkeys.h | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/arch/powerpc/include/asm/pkeys.h b/arch/powerpc/include/asm/pkeys.h index a8ef7fa5360e..2298771b066b 100644 --- a/arch/powerpc/include/asm/pkeys.h +++ b/arch/powerpc/include/asm/pkeys.h @@ -71,6 +71,15 @@ static inline u64 pte_to_hpte_pkey_bits(u64 pteflags) ((pteflags & H_PTE_PKEY_BIT4) ? HPTE_R_KEY_BIT4 : 0x0UL)); } +static inline u16 pte_to_pkey_bits(u64 pteflags) +{ + return (((pteflags & H_PTE_PKEY_BIT0) ? 0x10 : 0x0UL) | + ((pteflags & H_PTE_PKEY_BIT1) ? 0x8 : 0x0UL) | + ((pteflags & H_PTE_PKEY_BIT2) ? 0x4 : 0x0UL) | + ((pteflags & H_PTE_PKEY_BIT3) ? 0x2 : 0x0UL) | + ((pteflags & H_PTE_PKEY_BIT4) ? 0x1 : 0x0UL)); +} + #define pkey_alloc_mask(pkey) (0x1 << pkey) #define mm_pkey_allocation_map(mm) (mm->context.pkey_allocation_map) |