diff options
| author |   David Gibson <david@gibson.dropbear.id.au> | 2016-02-09 13:32:43 +1000 |
|---|---|---|
| committer |   Michael Ellerman <mpe@ellerman.id.au> | 2016-03-02 09:06:16 +1100 |
| commit | 5c3c7ede2bdcb85fa2fd51c8147cdf70ebc17fcb (patch) | |
| tree | 53b8530977350f92bf76ac0373eb7023a18839a3 /arch/powerpc/include | |
| parent | powerpc/mm: Clean up memory hotplug failure paths (diff) | |
powerpc/mm: Split hash page table sizing heuristic into a helper
htab_get_table_size() either retrieve the size of the hash page table (HPT)
from the device tree - if the HPT size is determined by firmware - or
uses a heuristic to determine a good size based on RAM size if the kernel
is responsible for allocating the HPT.
To support a PAPR extension allowing resizing of the HPT, we're going to
want the memory size -> HPT size logic elsewhere, so split it out into a
helper function.
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Reviewed-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')
| -rw-r--r-- | arch/powerpc/include/asm/mmu-hash64.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/arch/powerpc/include/asm/mmu-hash64.h b/arch/powerpc/include/asm/mmu-hash64.h index e36dc90c80d0..0cea4807e26f 100644 --- a/arch/powerpc/include/asm/mmu-hash64.h +++ b/arch/powerpc/include/asm/mmu-hash64.h @@ -608,6 +608,9 @@ static inline unsigned long get_kernel_vsid(unsigned long ea, int ssize) context = (MAX_USER_CONTEXT) + ((ea >> 60) - 0xc) + 1; return get_vsid(context, ea, ssize); } + +unsigned htab_shift_for_mem_size(unsigned long mem_size); + #endif /* __ASSEMBLY__ */ #endif /* _ASM_POWERPC_MMU_HASH64_H_ */ |