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| author | Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com> | 2020-07-09 06:29:39 +0300 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2020-07-20 15:57:59 +0300 |
| commit | f7045a45115b17fe695ea7075f5213706f202edb (patch) | |
| tree | fd5af6f2593f50d9a7d3af5d6257a0393c2073df /arch/powerpc/mm | |
| parent | 2daf298de728dc37f32d0749fa4f59db36fa7d96 (diff) | |
| download | linux-f7045a45115b17fe695ea7075f5213706f202edb.tar.xz | |
powerpc/book3s64/pkeys: Use MMU_FTR_PKEY instead of pkey_disabled static key
Instead of pkey_disabled static key use mmu feature MMU_FTR_PKEY.
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/20200709032946.881753-17-aneesh.kumar@linux.ibm.com
Diffstat (limited to 'arch/powerpc/mm')
| -rw-r--r-- | arch/powerpc/mm/book3s64/pkeys.c | 17 |
1 files changed, 7 insertions, 10 deletions
diff --git a/arch/powerpc/mm/book3s64/pkeys.c b/arch/powerpc/mm/book3s64/pkeys.c index 9969bc82e2ce..2c1bddccd67b 100644 --- a/arch/powerpc/mm/book3s64/pkeys.c +++ b/arch/powerpc/mm/book3s64/pkeys.c @@ -12,8 +12,6 @@ #include <linux/pkeys.h> #include <linux/of_fdt.h> - -DEFINE_STATIC_KEY_FALSE(pkey_disabled); int num_pkey; /* Max number of pkeys supported */ /* * Keys marked in the reservation list cannot be allocated by userspace @@ -126,7 +124,6 @@ void __init pkey_early_init_devtree(void) pkeys_total = scan_pkey_feature(); if (!pkeys_total) { /* No support for pkey. Mark it disabled */ - static_branch_enable(&pkey_disabled); return; } @@ -216,7 +213,7 @@ void __init pkey_early_init_devtree(void) void pkey_mm_init(struct mm_struct *mm) { - if (static_branch_likely(&pkey_disabled)) + if (!mmu_has_feature(MMU_FTR_PKEY)) return; mm_pkey_allocation_map(mm) = initial_allocation_mask; mm->context.execute_only_pkey = execute_only_key; @@ -320,7 +317,7 @@ int __arch_set_user_pkey_access(struct task_struct *tsk, int pkey, void thread_pkey_regs_save(struct thread_struct *thread) { - if (static_branch_likely(&pkey_disabled)) + if (!mmu_has_feature(MMU_FTR_PKEY)) return; /* @@ -334,7 +331,7 @@ void thread_pkey_regs_save(struct thread_struct *thread) void thread_pkey_regs_restore(struct thread_struct *new_thread, struct thread_struct *old_thread) { - if (static_branch_likely(&pkey_disabled)) + if (!mmu_has_feature(MMU_FTR_PKEY)) return; if (old_thread->amr != new_thread->amr) @@ -347,7 +344,7 @@ void thread_pkey_regs_restore(struct thread_struct *new_thread, void thread_pkey_regs_init(struct thread_struct *thread) { - if (static_branch_likely(&pkey_disabled)) + if (!mmu_has_feature(MMU_FTR_PKEY)) return; thread->amr = default_amr; @@ -418,7 +415,7 @@ static bool pkey_access_permitted(int pkey, bool write, bool execute) bool arch_pte_access_permitted(u64 pte, bool write, bool execute) { - if (static_branch_likely(&pkey_disabled)) + if (!mmu_has_feature(MMU_FTR_PKEY)) return true; return pkey_access_permitted(pte_to_pkey_bits(pte), write, execute); @@ -435,7 +432,7 @@ bool arch_pte_access_permitted(u64 pte, bool write, bool execute) bool arch_vma_access_permitted(struct vm_area_struct *vma, bool write, bool execute, bool foreign) { - if (static_branch_likely(&pkey_disabled)) + if (!mmu_has_feature(MMU_FTR_PKEY)) return true; /* * Do not enforce our key-permissions on a foreign vma. @@ -448,7 +445,7 @@ bool arch_vma_access_permitted(struct vm_area_struct *vma, bool write, void arch_dup_pkeys(struct mm_struct *oldmm, struct mm_struct *mm) { - if (static_branch_likely(&pkey_disabled)) + if (!mmu_has_feature(MMU_FTR_PKEY)) return; /* Duplicate the oldmm pkey state in mm: */ |