diff options
| author | Nicholas Piggin <npiggin@gmail.com> | 2021-04-29 22:58:26 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2021-04-30 11:20:40 -0700 |
| commit | bbc180a5adb05ee8053fab7a0c0bd56c5964240e (patch) | |
| tree | 386f4b3660b5924424a6d36689c3eb3c773588fc /arch/x86/include/asm/vmalloc.h | |
| parent | 95f0ddf081af3a77433090d9deaf3f76f5648336 (diff) | |
mm: HUGE_VMAP arch support cleanup
This changes the awkward approach where architectures provide init
functions to determine which levels they can provide large mappings for,
to one where the arch is queried for each call.
This removes code and indirection, and allows constant-folding of dead
code for unsupported levels.
This also adds a prot argument to the arch query. This is unused
currently but could help with some architectures (e.g., some powerpc
processors can't map uncacheable memory with large pages).
Link: https://lkml.kernel.org/r/20210317062402.533919-7-npiggin@gmail.com
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Reviewed-by: Ding Tianhong <dingtianhong@huawei.com>
Acked-by: Catalin Marinas <catalin.marinas@arm.com> [arm64]
Cc: Will Deacon <will@kernel.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Borislav Petkov <bp@alien8.de>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Christoph Hellwig <hch@lst.de>
Cc: Miaohe Lin <linmiaohe@huawei.com>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Russell King <linux@armlinux.org.uk>
Cc: Uladzislau Rezki (Sony) <urezki@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'arch/x86/include/asm/vmalloc.h')
| -rw-r--r-- | arch/x86/include/asm/vmalloc.h | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/arch/x86/include/asm/vmalloc.h b/arch/x86/include/asm/vmalloc.h index 29837740b520..094ea2b565f3 100644 --- a/arch/x86/include/asm/vmalloc.h +++ b/arch/x86/include/asm/vmalloc.h @@ -1,6 +1,13 @@ #ifndef _ASM_X86_VMALLOC_H #define _ASM_X86_VMALLOC_H +#include <asm/page.h> #include <asm/pgtable_areas.h> +#ifdef CONFIG_HAVE_ARCH_HUGE_VMAP +bool arch_vmap_p4d_supported(pgprot_t prot); +bool arch_vmap_pud_supported(pgprot_t prot); +bool arch_vmap_pmd_supported(pgprot_t prot); +#endif + #endif /* _ASM_X86_VMALLOC_H */ |