diff options
| author | Anshuman Khandual <anshuman.khandual@arm.com> | 2022-04-28 23:16:13 -0700 |
|---|---|---|
| committer | akpm <akpm@linux-foundation.org> | 2022-04-28 23:16:13 -0700 |
| commit | 91d4ce985fbb22c9a8ae50601f1ad4fe953b9382 (patch) | |
| tree | 9cbc91035bb2e71b8a96f145dbbcfae91bf3da89 /arch/sparc/mm | |
| parent | b3aca728fb276782ab3c851aedaf3d19b33faabe (diff) | |
sparc/mm: enable ARCH_HAS_VM_GET_PAGE_PROT
This defines and exports a platform specific custom vm_get_page_prot() via
subscribing ARCH_HAS_VM_GET_PAGE_PROT. It localizes
arch_vm_get_page_prot() as sparc_vm_get_page_prot() and moves near
vm_get_page_prot().
Link: https://lkml.kernel.org/r/20220414062125.609297-5-anshuman.khandual@arm.com
Signed-off-by: Anshuman Khandual <anshuman.khandual@arm.com>
Acked-by: David S. Miller <davem@davemloft.net>
Reviewed-by: Khalid Aziz <khalid.aziz@oracle.com>
Reviewed-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Cc: Khalid Aziz <khalid.aziz@oracle.com>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Christoph Hellwig <hch@infradead.org>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Will Deacon <will@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'arch/sparc/mm')
| -rw-r--r-- | arch/sparc/mm/init_64.c | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/arch/sparc/mm/init_64.c b/arch/sparc/mm/init_64.c index 8b1911591581..f6174df2d5af 100644 --- a/arch/sparc/mm/init_64.c +++ b/arch/sparc/mm/init_64.c @@ -3184,3 +3184,15 @@ void copy_highpage(struct page *to, struct page *from) } } EXPORT_SYMBOL(copy_highpage); + +pgprot_t vm_get_page_prot(unsigned long vm_flags) +{ + unsigned long prot = pgprot_val(protection_map[vm_flags & + (VM_READ|VM_WRITE|VM_EXEC|VM_SHARED)]); + + if (vm_flags & VM_SPARC_ADI) + prot |= _PAGE_MCD_4V; + + return __pgprot(prot); +} +EXPORT_SYMBOL(vm_get_page_prot); |