diff options
| -rw-r--r-- | arch/powerpc/include/asm/kvm_host.h | 3 | ||||
| -rw-r--r-- | arch/powerpc/include/asm/kvm_ppc.h | 1 | ||||
| -rw-r--r-- | arch/powerpc/kvm/Kconfig | 2 | ||||
| -rw-r--r-- | arch/powerpc/kvm/booke.c | 6 | ||||
| -rw-r--r-- | arch/powerpc/kvm/e500_tlb.c | 60 |
5 files changed, 65 insertions, 7 deletions
diff --git a/arch/powerpc/include/asm/kvm_host.h b/arch/powerpc/include/asm/kvm_host.h index 28e8f5e..cea9d3a 100644 --- a/arch/powerpc/include/asm/kvm_host.h +++ b/arch/powerpc/include/asm/kvm_host.h @@ -46,7 +46,8 @@ #define KVM_COALESCED_MMIO_PAGE_OFFSET 1 #endif -#ifdef CONFIG_KVM_BOOK3S_64_HV +#if defined(CONFIG_KVM_BOOK3S_64_HV) || defined(CONFIG_KVM_E500V2) || \ + defined(CONFIG_KVM_E500MC) #include <linux/mmu_notifier.h> #define KVM_ARCH_WANT_MMU_NOTIFIER diff --git a/arch/powerpc/include/asm/kvm_ppc.h b/arch/powerpc/include/asm/kvm_ppc.h index e006f0b..88de314 100644 --- a/arch/powerpc/include/asm/kvm_ppc.h +++ b/arch/powerpc/include/asm/kvm_ppc.h @@ -104,6 +104,7 @@ extern void kvmppc_core_queue_external(struct kvm_vcpu *vcpu, struct kvm_interrupt *irq); extern void kvmppc_core_dequeue_external(struct kvm_vcpu *vcpu, struct kvm_interrupt *irq); +extern void kvmppc_core_flush_tlb(struct kvm_vcpu *vcpu); extern int kvmppc_core_emulate_op(struct kvm_run *run, struct kvm_vcpu *vcpu, unsigned int op, int *advance); diff --git a/arch/powerpc/kvm/Kconfig b/arch/powerpc/kvm/Kconfig index f4dacb9..40cad8c 100644 --- a/arch/powerpc/kvm/Kconfig +++ b/arch/powerpc/kvm/Kconfig @@ -123,6 +123,7 @@ config KVM_E500V2 depends on EXPERIMENTAL && E500 && !PPC_E500MC select KVM select KVM_MMIO + select MMU_NOTIFIER ---help--- Support running unmodified E500 guest kernels in virtual machines on E500v2 host processors. @@ -138,6 +139,7 @@ config KVM_E500MC select KVM select KVM_MMIO select KVM_BOOKE_HV + select MMU_NOTIFIER ---help--- Support running unmodified E500MC/E5500 (32-bit) guest kernels in virtual machines on E500MC/E5500 host processors. diff --git a/arch/powerpc/kvm/booke.c b/arch/powerpc/kvm/booke.c index 70a86c0..52f6cbb 100644 --- a/arch/powerpc/kvm/booke.c +++ b/arch/powerpc/kvm/booke.c @@ -459,6 +459,10 @@ static void kvmppc_check_requests(struct kvm_vcpu *vcpu) if (vcpu->requests) { if (kvm_check_request(KVM_REQ_PENDING_TIMER, vcpu)) update_timer_ints(vcpu); +#if defined(CONFIG_KVM_E500V2) || defined(CONFIG_KVM_E500MC) + if (kvm_check_request(KVM_REQ_TLB_FLUSH, vcpu)) + kvmppc_core_flush_tlb(vcpu); +#endif } } @@ -579,6 +583,8 @@ int kvmppc_vcpu_run(struct kvm_run *kvm_run, struct kvm_vcpu *vcpu) #endif kvm_guest_exit(); + vcpu->mode = OUTSIDE_GUEST_MODE; + smp_wmb(); out: vcpu->mode = OUTSIDE_GUEST_MODE; diff --git a/arch/powerpc/kvm/e500_tlb.c b/arch/powerpc/kvm/e500_tlb.c index b56b6e1..de8ea29 100644 --- a/arch/powerpc/kvm/e500_tlb.c +++ b/arch/powerpc/kvm/e500_tlb.c @@ -303,18 +303,15 @@ static inline void kvmppc_e500_ref_setup(struct tlbe_ref *ref, ref->pfn = pfn; ref->flags = E500_TLB_VALID; - if (tlbe_is_writable(gtlbe)) + if (tlbe_is_writable(gtlbe)) { ref->flags |= E500_TLB_DIRTY; + kvm_set_pfn_dirty(pfn); + } } static inline void kvmppc_e500_ref_release(struct tlbe_ref *ref) { if (ref->flags & E500_TLB_VALID) { - if (ref->flags & E500_TLB_DIRTY) - kvm_release_pfn_dirty(ref->pfn); - else - kvm_release_pfn_clean(ref->pfn); - ref->flags = 0; } } @@ -357,6 +354,13 @@ static void clear_tlb_refs(struct kvmppc_vcpu_e500 *vcpu_e500) clear_tlb_privs(vcpu_e500); } +void kvmppc_core_flush_tlb(struct kvm_vcpu *vcpu) +{ + struct kvmppc_vcpu_e500 *vcpu_e500 = to_e500(vcpu); + clear_tlb_refs(vcpu_e500); + clear_tlb1_bitmap(vcpu_e500); +} + static inline void kvmppc_e500_deliver_tlb_miss(struct kvm_vcpu *vcpu, unsigned int eaddr, int as) { @@ -541,6 +545,9 @@ static inline void kvmppc_e500_shadow_map(struct kvmppc_vcpu_e500 *vcpu_e500, /* Clear i-cache for new pages */ kvmppc_mmu_flush_icache(pfn); + + /* Drop refcount on page, so that mmu notifiers can clear it */ + kvm_release_pfn_clean(pfn); } /* XXX only map the one-one case, for now use TLB0 */ @@ -1064,6 +1071,47 @@ void kvmppc_mmu_map(struct kvm_vcpu *vcpu, u64 eaddr, gpa_t gpaddr, write_stlbe(vcpu_e500, gtlbe, &stlbe, stlbsel, sesel); } +/************* MMU Notifiers *************/ + +int kvm_unmap_hva(struct kvm *kvm, unsigned long hva) +{ + /* + * Flush all shadow tlb entries everywhere. This is slow, but + * we are 100% sure that we catch the to be unmapped page + */ + kvm_flush_remote_tlbs(kvm); + + return 0; +} + +int kvm_unmap_hva_range(struct kvm *kvm, unsigned long start, unsigned long end) +{ + /* kvm_unmap_hva flushes everything anyways */ + kvm_unmap_hva(kvm, start); + + return 0; +} + +int kvm_age_hva(struct kvm *kvm, unsigned long hva) +{ + /* XXX could be more clever ;) */ + return 0; +} + +int kvm_test_age_hva(struct kvm *kvm, unsigned long hva) +{ + /* XXX could be more clever ;) */ + return 0; +} + +void kvm_set_spte_hva(struct kvm *kvm, unsigned long hva, pte_t pte) +{ + /* The page will get remapped properly on its next fault */ + kvm_unmap_hva(kvm, hva); +} + +/*****************************************/ + static void free_gtlb(struct kvmppc_vcpu_e500 *vcpu_e500) { int i; |
