On 03/26/2013 05:05:10 PM, Mihai Caraman wrote:
Embedded.Page Table (E.PT) category in VMs requires indirect tlb
entries
emulation which is not supported yet. Configure TLBnCFG to remove E.PT
and E.HV.LRAT categories from VCPUs.
Signed-off-by: Mihai Caraman <mihai.caraman@xxxxxxxxxxxxx>
---
v2:
- Remove E.HV.LRAT from vcpus
arch/powerpc/kvm/e500_mmu.c | 6 ++++++
1 files changed, 6 insertions(+), 0 deletions(-)
diff --git a/arch/powerpc/kvm/e500_mmu.c b/arch/powerpc/kvm/e500_mmu.c
index cf60db1..0d2a293 100644
--- a/arch/powerpc/kvm/e500_mmu.c
+++ b/arch/powerpc/kvm/e500_mmu.c
@@ -867,11 +867,17 @@ static int vcpu_mmu_init(struct kvm_vcpu *vcpu,
vcpu->arch.tlbcfg[1] |= params[1].ways << TLBnCFG_ASSOC_SHIFT;
if (has_feature(vcpu, VCPU_FTR_MMU_V2)) {
+ vcpu->arch.mmucfg &= ~MMUCFG_LRAT;
+
if (has_feature(vcpu, VCPU_FTR_E_PT))
vcpu->arch.eptcfg = mfspr(SPRN_EPTCFG);
else
vcpu->arch.eptcfg = 0;
+ /* Guest mmu emulation currently doesn't handle E.PT */
+ vcpu->arch.tlbcfg[0] &= ~TLBnCFG_PT;
+ vcpu->arch.tlbcfg[1] &= ~TLBnCFG_IND;
You're clearing these bits *after* calling has_feature() -- doesn't
has_feature() depend on those bits being cleared to not advertise E_PT
support?
-Scott
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