[PATCH 24/52] KVM: PPC: e500: Fix TLBnCFG in KVM_CONFIG_TLB

Alexander Graf
2012-01-13T14:58:38Z

From: Scott Wood <scottwood@freescale.com>

The associativity, not just total size, can differ from the host
hardware.

Signed-off-by: Scott Wood <scottwood@freescale.com>
Signed-off-by: Alexander Graf <agraf@suse.de>
---
arch/powerpc/kvm/e500_tlb.c | 19 ++++++++++++++-----
1 files changed, 14 insertions(+), 5 deletions(-)

diff --git a/arch/powerpc/kvm/e500_tlb.c b/arch/powerpc/kvm/e500_tlb.c
index 9cd124a..5073768 100644
--- a/arch/powerpc/kvm/e500_tlb.c
+++ b/arch/powerpc/kvm/e500_tlb.c
@@ -1227,12 +1227,14 @@ int kvm_vcpu_ioctl_config_tlb(struct kvm_vcpu *vcpu,
vcpu_e500->gtlb_offset[0] = 0;
vcpu_e500->gtlb_offset[1] = params.tlb_sizes[0];

- vcpu_e500->tlb0cfg = mfspr(SPRN_TLB0CFG) & ~0xfffUL;
+ vcpu_e500->tlb0cfg &= ~(TLBnCFG_N_ENTRY | TLBnCFG_ASSOC);
if (params.tlb_sizes[0] <= 2048)
vcpu_e500->tlb0cfg |= params.tlb_sizes[0];
+ vcpu_e500->tlb0cfg |= params.tlb_ways[0] << TLBnCFG_ASSOC_SHIFT;

- vcpu_e500->tlb1cfg = mfspr(SPRN_TLB1CFG) & ~0xfffUL;
+ vcpu_e500->tlb1cfg &= ~(TLBnCFG_N_ENTRY | TLBnCFG_ASSOC);
vcpu_e500->tlb1cfg |= params.tlb_sizes[1];
+ vcpu_e500->tlb1cfg |= params.tlb_ways[1] << TLBnCFG_ASSOC_SHIFT;

vcpu_e500->shared_tlb_pages = pages;
vcpu_e500->num_shared_tlb_pages = num_pages;
@@ -1348,10 +1350,17 @@ int kvmppc_e500_tlb_init(struct kvmppc_vcpu_e500 *vcpu_e500)
goto err;

/* Init TLB configuration register */
- vcpu_e500->tlb0cfg = mfspr(SPRN_TLB0CFG) & ~0xfffUL;
+ vcpu_e500->tlb0cfg = mfspr(SPRN_TLB0CFG) &
+ ~(TLBnCFG_N_ENTRY | TLBnCFG_ASSOC);
vcpu_e500->tlb0cfg |= vcpu_e500->gtlb_params[0].entries;
- vcpu_e500->tlb1cfg = mfspr(SPRN_TLB1CFG) & ~0xfffUL;
- vcpu_e500->tlb1cfg |= vcpu_e500->gtlb_params[1].entries;
+ vcpu_e500->tlb0cfg |=
+ vcpu_e500->gtlb_params[0].ways << TLBnCFG_ASSOC_SHIFT;
+
+ vcpu_e500->tlb1cfg = mfspr(SPRN_TLB1CFG) &
+ ~(TLBnCFG_N_ENTRY | TLBnCFG_ASSOC);
+ vcpu_e500->tlb0cfg |= vcpu_e500->gtlb_params[1].entries;
+ vcpu_e500->tlb0cfg |=
+ vcpu_e500->gtlb_params[1].ways << TLBnCFG_ASSOC_SHIFT;

return 0;

--
1.6.0.2