diff options
| author | Li Zhong <zhong@linux.vnet.ibm.com> | 2013-04-15 16:53:19 +0000 |
|---|---|---|
| committer | Michael Ellerman <michael@ellerman.id.au> | 2013-04-18 15:59:59 +1000 |
| commit | b170bd3de6a7f6fbfba331e300751450f55d8822 (patch) | |
| tree | d703646cc3179549eb40eb99741f04b887ec0637 /arch/powerpc/mm/hash_utils_64.c | |
| parent | 2c3c0693d9cf06d7baf99cfdc10f9c4d40198c6b (diff) | |
powerpc: Split the code trying to insert hpte repeatedly as an helper function
Move the logic trying to insert hpte in __hash_page_huge() to an helper
function, so it could also be used by others.
Signed-off-by: Li Zhong <zhong@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <michael@ellerman.id.au>
Diffstat (limited to 'arch/powerpc/mm/hash_utils_64.c')
| -rw-r--r-- | arch/powerpc/mm/hash_utils_64.c | 35 |
1 files changed, 35 insertions, 0 deletions
diff --git a/arch/powerpc/mm/hash_utils_64.c b/arch/powerpc/mm/hash_utils_64.c index f410c3e12c1..ead9fa84ffd 100644 --- a/arch/powerpc/mm/hash_utils_64.c +++ b/arch/powerpc/mm/hash_utils_64.c @@ -1230,6 +1230,41 @@ void low_hash_fault(struct pt_regs *regs, unsigned long address, int rc) bad_page_fault(regs, address, SIGBUS); } +long hpte_insert_repeating(unsigned long hash, unsigned long vpn, + unsigned long pa, unsigned long rflags, + unsigned long vflags, int psize, int ssize) +{ + unsigned long hpte_group; + long slot; + +repeat: + hpte_group = ((hash & htab_hash_mask) * + HPTES_PER_GROUP) & ~0x7UL; + + /* Insert into the hash table, primary slot */ + slot = ppc_md.hpte_insert(hpte_group, vpn, pa, rflags, vflags, + psize, ssize); + + /* Primary is full, try the secondary */ + if (unlikely(slot == -1)) { + hpte_group = ((~hash & htab_hash_mask) * + HPTES_PER_GROUP) & ~0x7UL; + slot = ppc_md.hpte_insert(hpte_group, vpn, pa, rflags, + vflags | HPTE_V_SECONDARY, + psize, ssize); + if (slot == -1) { + if (mftb() & 0x1) + hpte_group = ((hash & htab_hash_mask) * + HPTES_PER_GROUP)&~0x7UL; + + ppc_md.hpte_remove(hpte_group); + goto repeat; + } + } + + return slot; +} + #ifdef CONFIG_DEBUG_PAGEALLOC static void kernel_map_linear_page(unsigned long vaddr, unsigned long lmi) { |