diff options
| author | Paul Mackerras <paulus@samba.org> | 2007-02-06 21:10:31 +1100 |
|---|---|---|
| committer | Paul Mackerras <paulus@samba.org> | 2007-02-07 14:03:23 +1100 |
| commit | f03e64f2ca6ee3d0b7824536b1940497701fe766 (patch) | |
| tree | b91a2f5d29c7772f0b77a894fe745f3e67dd79bd | |
| parent | e56a6e20f3029ed5c178dd0328bd688dbbc8272a (diff) | |
| download | linux-3.10-f03e64f2ca6ee3d0b7824536b1940497701fe766.tar.gz linux-3.10-f03e64f2ca6ee3d0b7824536b1940497701fe766.tar.bz2 linux-3.10-f03e64f2ca6ee3d0b7824536b1940497701fe766.zip | |
[POWERPC] Make pSeries use the H_BULK_REMOVE hypervisor call
H_BULK_REMOVE lets us remove 4 entries from the MMU hash table with one
hypervisor call. This uses it in pSeries_lpar_hpte_invalidate so we
can tear down mappings with fewer hypervisor calls.
Signed-off-by: Paul Mackerras <paulus@samba.org>
| -rw-r--r-- | arch/powerpc/platforms/pseries/lpar.c | 51 | ||||
| -rw-r--r-- | include/asm-powerpc/hvcall.h | 1 |
2 files changed, 47 insertions, 5 deletions
diff --git a/arch/powerpc/platforms/pseries/lpar.c b/arch/powerpc/platforms/pseries/lpar.c index 721436db3ef..5a684fbd8f2 100644 --- a/arch/powerpc/platforms/pseries/lpar.c +++ b/arch/powerpc/platforms/pseries/lpar.c @@ -502,23 +502,64 @@ static void pSeries_lpar_hpte_invalidate(unsigned long slot, unsigned long va, BUG_ON(lpar_rc != H_SUCCESS); } +/* Flag bits for H_BULK_REMOVE */ +#define HBR_REQUEST 0x4000000000000000UL +#define HBR_RESPONSE 0x8000000000000000UL +#define HBR_END 0xc000000000000000UL +#define HBR_AVPN 0x0200000000000000UL +#define HBR_ANDCOND 0x0100000000000000UL + /* * Take a spinlock around flushes to avoid bouncing the hypervisor tlbie * lock. */ static void pSeries_lpar_flush_hash_range(unsigned long number, int local) { - int i; - unsigned long flags = 0; + unsigned long i, pix, rc; + unsigned long flags; struct ppc64_tlb_batch *batch = &__get_cpu_var(ppc64_tlb_batch); int lock_tlbie = !cpu_has_feature(CPU_FTR_LOCKLESS_TLBIE); + unsigned long param[9]; + unsigned long va; + unsigned long hash, index, shift, hidx, slot; + real_pte_t pte; + int psize; if (lock_tlbie) spin_lock_irqsave(&pSeries_lpar_tlbie_lock, flags); - for (i = 0; i < number; i++) - flush_hash_page(batch->vaddr[i], batch->pte[i], - batch->psize, local); + psize = batch->psize; + pix = 0; + for (i = 0; i < number; i++) { + va = batch->vaddr[i]; + pte = batch->pte[i]; + pte_iterate_hashed_subpages(pte, psize, va, index, shift) { + hash = hpt_hash(va, shift); + hidx = __rpte_to_hidx(pte, index); + if (hidx & _PTEIDX_SECONDARY) + hash = ~hash; + slot = (hash & htab_hash_mask) * HPTES_PER_GROUP; + slot += hidx & _PTEIDX_GROUP_IX; + param[pix] = HBR_REQUEST | HBR_AVPN | slot; + param[pix+1] = hpte_encode_v(va, psize) & HPTE_V_AVPN; + pix += 2; + if (pix == 8) { + rc = plpar_hcall9(H_BULK_REMOVE, param, + param[0], param[1], param[2], + param[3], param[4], param[5], + param[6], param[7]); + BUG_ON(rc != H_SUCCESS); + pix = 0; + } + } pte_iterate_hashed_end(); + } + if (pix) { + param[pix] = HBR_END; + rc = plpar_hcall9(H_BULK_REMOVE, param, param[0], param[1], + param[2], param[3], param[4], param[5], + param[6], param[7]); + BUG_ON(rc != H_SUCCESS); + } if (lock_tlbie) spin_unlock_irqrestore(&pSeries_lpar_tlbie_lock, flags); diff --git a/include/asm-powerpc/hvcall.h b/include/asm-powerpc/hvcall.h index 7a500732b67..60977806d2f 100644 --- a/include/asm-powerpc/hvcall.h +++ b/include/asm-powerpc/hvcall.h @@ -168,6 +168,7 @@ #define H_FREE_LOGICAL_LAN 0x118 #define H_ADD_LOGICAL_LAN_BUFFER 0x11C #define H_SEND_LOGICAL_LAN 0x120 +#define H_BULK_REMOVE 0x124 #define H_MULTICAST_CTRL 0x130 #define H_SET_XDABR 0x134 #define H_STUFF_TCE 0x138 |