[PATCH 08/15] KVM: PPC: e500: Disable preloading TLB1 in tlb_load().

Alexander Graf
2011-06-17T14:49:45Z

From: Scott Wood <scottwood@freescale.com>

Since TLB1 loading doesn't check the shadow TLB before allocating another
entry, you can get duplicates.

Once shadow PIDs are enabled in a later patch, we won't need to
invalidate the TLB on every switch, so this optimization won't be
needed anyway.

Signed-off-by: Scott Wood <scottwood@freescale.com>
Signed-off-by: Alexander Graf <agraf@suse.de>
---
arch/powerpc/kvm/e500_tlb.c | 18 ------------------
1 files changed, 0 insertions(+), 18 deletions(-)

diff --git a/arch/powerpc/kvm/e500_tlb.c b/arch/powerpc/kvm/e500_tlb.c
index b18fe35..e0ab216 100644
--- a/arch/powerpc/kvm/e500_tlb.c
+++ b/arch/powerpc/kvm/e500_tlb.c
@@ -144,24 +144,6 @@ static inline void write_host_tlbe(struct kvmppc_vcpu_e500 *vcpu_e500,

void kvmppc_e500_tlb_load(struct kvm_vcpu *vcpu, int cpu)
{
- struct kvmppc_vcpu_e500 *vcpu_e500 = to_e500(vcpu);
- int i;
- unsigned register mas0;
-
- /* Load all valid TLB1 entries to reduce guest tlb miss fault */
- local_irq_disable();
- mas0 = mfspr(SPRN_MAS0);
- for (i = 0; i < tlb1_max_shadow_size(); i++) {
- struct tlbe *stlbe = &vcpu_e500->shadow_tlb[1][i];
-
- if (get_tlb_v(stlbe)) {
- mtspr(SPRN_MAS0, MAS0_TLBSEL(1)
- | MAS0_ESEL(to_htlb1_esel(i)));
- __write_host_tlbe(stlbe);
- }
- }
- mtspr(SPRN_MAS0, mas0);
- local_irq_enable();
}

void kvmppc_e500_tlb_put(struct kvm_vcpu *vcpu)
--
1.6.0.2