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

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>

diff --git a/arch/powerpc/kvm/e500_tlb.c b/arch/powerpc/kvm/e500_tlb.c
index ea39457..13c432e 100644 (file)
--- a/arch/powerpc/kvm/e500_tlb.c
+++ b/arch/powerpc/kvm/e500_tlb.c
@@ -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;