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| author | Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com> | 2020-11-27 10:14:05 +0530 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2020-12-04 01:01:24 +1100 |
| commit | 227ae625522c65c4535cabe407f47abc058585ed (patch) | |
| tree | 115f18a716578ca066bd895cb283c3d028705fbc /arch/powerpc/mm/book3s64/pkeys.c | |
| parent | 9f378b9f007cc94beadea40df83cc62a76975c6f (diff) | |
| download | linux-227ae625522c65c4535cabe407f47abc058585ed.tar.bz2 | |
powerpc/book3s64/kuap/kuep: Add PPC_PKEY config on book3s64
The config CONFIG_PPC_PKEY is used to select the base support that is
required for PPC_MEM_KEYS, KUAP, and KUEP. Adding this dependency
reduces the code complexity(in terms of #ifdefs) and enables us to
move some of the initialization code to pkeys.c
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20201127044424.40686-4-aneesh.kumar@linux.ibm.com
Diffstat (limited to 'arch/powerpc/mm/book3s64/pkeys.c')
| -rw-r--r-- | arch/powerpc/mm/book3s64/pkeys.c | 24 |
1 files changed, 15 insertions, 9 deletions
diff --git a/arch/powerpc/mm/book3s64/pkeys.c b/arch/powerpc/mm/book3s64/pkeys.c index b1d091a97611..7dc71f85683d 100644 --- a/arch/powerpc/mm/book3s64/pkeys.c +++ b/arch/powerpc/mm/book3s64/pkeys.c @@ -89,12 +89,14 @@ static int scan_pkey_feature(void) } } +#ifdef CONFIG_PPC_MEM_KEYS /* * Adjust the upper limit, based on the number of bits supported by * arch-neutral code. */ pkeys_total = min_t(int, pkeys_total, ((ARCH_VM_PKEY_FLAGS >> VM_PKEY_SHIFT) + 1)); +#endif return pkeys_total; } @@ -102,6 +104,7 @@ void __init pkey_early_init_devtree(void) { int pkeys_total, i; +#ifdef CONFIG_PPC_MEM_KEYS /* * We define PKEY_DISABLE_EXECUTE in addition to the arch-neutral * generic defines for PKEY_DISABLE_ACCESS and PKEY_DISABLE_WRITE. @@ -117,7 +120,7 @@ void __init pkey_early_init_devtree(void) BUILD_BUG_ON(__builtin_clzl(ARCH_VM_PKEY_FLAGS >> VM_PKEY_SHIFT) + __builtin_popcountl(ARCH_VM_PKEY_FLAGS >> VM_PKEY_SHIFT) != (sizeof(u64) * BITS_PER_BYTE)); - +#endif /* * Only P7 and above supports SPRN_AMR update with MSR[PR] = 1 */ @@ -223,14 +226,6 @@ out: return; } -void pkey_mm_init(struct mm_struct *mm) -{ - if (!mmu_has_feature(MMU_FTR_PKEY)) - return; - mm_pkey_allocation_map(mm) = initial_allocation_mask; - mm->context.execute_only_pkey = execute_only_key; -} - static inline u64 read_amr(void) { return mfspr(SPRN_AMR); @@ -257,6 +252,15 @@ static inline void write_iamr(u64 value) mtspr(SPRN_IAMR, value); } +#ifdef CONFIG_PPC_MEM_KEYS +void pkey_mm_init(struct mm_struct *mm) +{ + if (!mmu_has_feature(MMU_FTR_PKEY)) + return; + mm_pkey_allocation_map(mm) = initial_allocation_mask; + mm->context.execute_only_pkey = execute_only_key; +} + static inline void init_amr(int pkey, u8 init_bits) { u64 new_amr_bits = (((u64)init_bits & 0x3UL) << pkeyshift(pkey)); @@ -445,3 +449,5 @@ void arch_dup_pkeys(struct mm_struct *oldmm, struct mm_struct *mm) mm_pkey_allocation_map(mm) = mm_pkey_allocation_map(oldmm); mm->context.execute_only_pkey = oldmm->context.execute_only_pkey; } + +#endif /* CONFIG_PPC_MEM_KEYS */ |