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| author | Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> | 2017-07-28 07:01:26 +0200 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2017-08-16 06:56:12 +0200 |
| commit | 79cc38ded1e1ac86e69c90f604efadd50b0b3762 (patch) | |
| tree | b7ec6f74be217b755dfa66908a84e70fed3a0cf3 /arch/powerpc/include/asm/book3s/64/mmu-hash.h | |
| parent | mm/hugetlb: Allow arch to override and call the weak function (diff) | |
| download | linux-79cc38ded1e1ac86e69c90f604efadd50b0b3762.tar.xz linux-79cc38ded1e1ac86e69c90f604efadd50b0b3762.zip | |
powerpc/mm/hugetlb: Add support for reserving gigantic huge pages via kernel command line
With commit aa888a74977a8 ("hugetlb: support larger than MAX_ORDER") we added
support for allocating gigantic hugepages via kernel command line. Switch
ppc64 arch specific code to use that.
W.r.t FSL support, we now limit our allocation range using BOOTMEM_ALLOC_ACCESSIBLE.
We use the kernel command line to do reservation of hugetlb pages on powernv
platforms. On pseries hash mmu mode the supported gigantic huge page size is
16GB and that can only be allocated with hypervisor assist. For pseries the
command line option doesn't do the allocation. Instead pseries does gigantic
hugepage allocation based on hypervisor hint that is specified via
"ibm,expected#pages" property of the memory node.
Cc: Scott Wood <oss@buserror.net>
Cc: Christophe Leroy <christophe.leroy@c-s.fr>
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Diffstat (limited to 'arch/powerpc/include/asm/book3s/64/mmu-hash.h')
| -rw-r--r-- | arch/powerpc/include/asm/book3s/64/mmu-hash.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/powerpc/include/asm/book3s/64/mmu-hash.h b/arch/powerpc/include/asm/book3s/64/mmu-hash.h index 6981a52b3887..f28d21c69f79 100644 --- a/arch/powerpc/include/asm/book3s/64/mmu-hash.h +++ b/arch/powerpc/include/asm/book3s/64/mmu-hash.h @@ -468,7 +468,7 @@ extern int htab_bolt_mapping(unsigned long vstart, unsigned long vend, int psize, int ssize); int htab_remove_mapping(unsigned long vstart, unsigned long vend, int psize, int ssize); -extern void add_gpage(u64 addr, u64 page_size, unsigned long number_of_pages); +extern void pseries_add_gpage(u64 addr, u64 page_size, unsigned long number_of_pages); extern void demote_segment_4k(struct mm_struct *mm, unsigned long addr); #ifdef CONFIG_PPC_PSERIES |