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[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>
This commit is contained in:
Paul Mackerras 2007-02-06 21:10:31 +11:00
parent e56a6e20f3
commit f03e64f2ca
2 changed files with 47 additions and 5 deletions
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51
arch/powerpc/platforms/pseries/lpar.c
View File

@ -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);

1
include/asm-powerpc/hvcall.h
View File

@ -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