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KVM: PPC: e500: Don't search over the entire TLB0.

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Only look in the 4 entries that could possibly contain the
entry we're looking for.

Signed-off-by: Scott Wood <scottwood@freescale.com>
Signed-off-by: Alexander Graf <agraf@suse.de>
This commit is contained in:
Scott Wood 2011-06-14 18:35:20 -05:00 committed by Avi Kivity
parent dd9ebf1f94
commit 1aee47a027
1 changed files with 14 additions and 4 deletions
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18
arch/powerpc/kvm/e500_tlb.c
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@ -418,11 +418,21 @@ static void kvmppc_e500_stlbe_invalidate(struct kvmppc_vcpu_e500 *vcpu_e500,
static int kvmppc_e500_tlb_index(struct kvmppc_vcpu_e500 *vcpu_e500,
gva_t eaddr, int tlbsel, unsigned int pid, int as)
{
int size = vcpu_e500->gtlb_size[tlbsel];
int set_base;
int i;
/* XXX Replace loop with fancy data structures. */
for (i = 0; i < vcpu_e500->gtlb_size[tlbsel]; i++) {
struct tlbe *tlbe = &vcpu_e500->gtlb_arch[tlbsel][i];
if (tlbsel == 0) {
int mask = size / KVM_E500_TLB0_WAY_NUM - 1;
set_base = (eaddr >> PAGE_SHIFT) & mask;
set_base *= KVM_E500_TLB0_WAY_NUM;
size = KVM_E500_TLB0_WAY_NUM;
} else {
set_base = 0;
}
for (i = 0; i < size; i++) {
struct tlbe *tlbe = &vcpu_e500->gtlb_arch[tlbsel][set_base + i];
unsigned int tid;
if (eaddr < get_tlb_eaddr(tlbe))
@ -441,7 +451,7 @@ static int kvmppc_e500_tlb_index(struct kvmppc_vcpu_e500 *vcpu_e500,
if (get_tlb_ts(tlbe) != as && as != -1)
continue;
return i;
return set_base + i;
}
return -1;