diff options
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/powerpc/kvm/book3s_hv.c | 13 |
1 files changed, 11 insertions, 2 deletions
diff --git a/arch/powerpc/kvm/book3s_hv.c b/arch/powerpc/kvm/book3s_hv.c index 788bc61bd08c..bf8def2159c3 100644 --- a/arch/powerpc/kvm/book3s_hv.c +++ b/arch/powerpc/kvm/book3s_hv.c @@ -4174,7 +4174,16 @@ static int kvmppc_vcpu_run_hv(struct kvm_run *run, struct kvm_vcpu *vcpu) vcpu->arch.state = KVMPPC_VCPU_BUSY_IN_HOST; do { - if (kvm->arch.threads_indep && kvm_is_radix(kvm)) + /* + * The early POWER9 chips that can't mix radix and HPT threads + * on the same core also need the workaround for the problem + * where the TLB would prefetch entries in the guest exit path + * for radix guests using the guest PIDR value and LPID 0. + * The workaround is in the old path (kvmppc_run_vcpu()) + * but not the new path (kvmhv_run_single_vcpu()). + */ + if (kvm->arch.threads_indep && kvm_is_radix(kvm) && + !no_mixing_hpt_and_radix) r = kvmhv_run_single_vcpu(run, vcpu, ~(u64)0, vcpu->arch.vcore->lpcr); else @@ -5196,7 +5205,7 @@ static int kvmhv_enable_nested(struct kvm *kvm) { if (!nested) return -EPERM; - if (!cpu_has_feature(CPU_FTR_ARCH_300)) + if (!cpu_has_feature(CPU_FTR_ARCH_300) || no_mixing_hpt_and_radix) return -ENODEV; /* kvm == NULL means the caller is testing if the capability exists */ |