diff options
| author | Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> | 2017-07-28 10:31:26 +0530 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2017-08-16 14:56:12 +1000 |
| commit | 79cc38ded1e1ac86e69c90f604efadd50b0b3762 (patch) | |
| tree | b7ec6f74be217b755dfa66908a84e70fed3a0cf3 /arch/powerpc/include/asm/hugetlb.h | |
| parent | e24a1307ba1f99fc62a0bd61d5e87fcfb6d5503d (diff) | |
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/hugetlb.h')
| -rw-r--r-- | arch/powerpc/include/asm/hugetlb.h | 14 |
1 files changed, 0 insertions, 14 deletions
diff --git a/arch/powerpc/include/asm/hugetlb.h b/arch/powerpc/include/asm/hugetlb.h index 7f4025a6c69e..b8a0fb442c64 100644 --- a/arch/powerpc/include/asm/hugetlb.h +++ b/arch/powerpc/include/asm/hugetlb.h @@ -218,18 +218,4 @@ static inline pte_t *hugepte_offset(hugepd_t hpd, unsigned long addr, } #endif /* CONFIG_HUGETLB_PAGE */ -/* - * FSL Book3E platforms require special gpage handling - the gpages - * are reserved early in the boot process by memblock instead of via - * the .dts as on IBM platforms. - */ -#if defined(CONFIG_HUGETLB_PAGE) && (defined(CONFIG_PPC_FSL_BOOK3E) || \ - defined(CONFIG_PPC_8xx)) -extern void __init reserve_hugetlb_gpages(void); -#else -static inline void reserve_hugetlb_gpages(void) -{ -} -#endif - #endif /* _ASM_POWERPC_HUGETLB_H */ |