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| author |   Christophe Leroy <christophe.leroy@csgroup.eu> | 2021-06-30 18:48:06 -0700 |
|---|---|---|
| committer |   Linus Torvalds <torvalds@linux-foundation.org> | 2021-06-30 20:47:26 -0700 |
| commit | f7ee1f13d606c1b1be3bdaf1609f3991bc06da87 (patch) | |
| tree | 4f030067ea2fadfbfe8d9986687ad73d7ddcac93 /include/linux/vmalloc.h | |
| parent | mm/pgtable: add stubs for {pmd/pub}_{set/clear}_huge (diff) | |
| download | linux-dev-f7ee1f13d606c1b1be3bdaf1609f3991bc06da87.tar.xz linux-dev-f7ee1f13d606c1b1be3bdaf1609f3991bc06da87.zip | |
mm/vmalloc: enable mapping of huge pages at pte level in vmap
On some architectures like powerpc, there are huge pages that are mapped
at pte level.
Enable it in vmap.
For that, architectures can provide arch_vmap_pte_range_map_size() that
returns the size of pages to map at pte level.
Link: https://lkml.kernel.org/r/fb3ccc73377832ac6708181ec419128a2f98ce36.1620795204.git.christophe.leroy@csgroup.eu
Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Mike Kravetz <mike.kravetz@oracle.com>
Cc: Mike Rapoport <rppt@kernel.org>
Cc: Nicholas Piggin <npiggin@gmail.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Uladzislau Rezki <uladzislau.rezki@sony.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include/linux/vmalloc.h')
| -rw-r--r-- | include/linux/vmalloc.h | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/include/linux/vmalloc.h b/include/linux/vmalloc.h index bfaaf0b6fa76..54ec0736a656 100644 --- a/include/linux/vmalloc.h +++ b/include/linux/vmalloc.h @@ -104,6 +104,14 @@ static inline bool arch_vmap_pmd_supported(pgprot_t prot) } #endif +#ifndef arch_vmap_pte_range_map_size +static inline unsigned long arch_vmap_pte_range_map_size(unsigned long addr, unsigned long end, + u64 pfn, unsigned int max_page_shift) +{ + return PAGE_SIZE; +} +#endif + /* * Highlevel APIs for driver use */ |