diff options
| author | Xiao Guangrong <xiaoguangrong@linux.vnet.ibm.com> | 2013-06-10 16:28:55 +0800 |
|---|---|---|
| committer | Gleb Natapov <gleb@redhat.com> | 2013-06-27 14:20:40 +0300 |
| commit | a8eca9dcc656a405a28ffba43f3d86a1ff0eb331 (patch) | |
| tree | 69459f3667603168a127c17fe17563dc8dad3daa /arch/x86 | |
| parent | 69c9ea93eaea95e3a2c5f1a0cf77b02c58979b9a (diff) | |
KVM: MMU: drop kvm_mmu_zap_mmio_sptes
Drop kvm_mmu_zap_mmio_sptes and use kvm_mmu_invalidate_zap_all_pages
instead to handle mmio generation number overflow
Signed-off-by: Xiao Guangrong <xiaoguangrong@linux.vnet.ibm.com>
Reviewed-by: Gleb Natapov <gleb@redhat.com>
Reviewed-by: Marcelo Tosatti <mtosatti@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'arch/x86')
| -rw-r--r-- | arch/x86/include/asm/kvm_host.h | 1 | ||||
| -rw-r--r-- | arch/x86/kvm/mmu.c | 22 |
2 files changed, 1 insertions, 22 deletions
diff --git a/arch/x86/include/asm/kvm_host.h b/arch/x86/include/asm/kvm_host.h index 90d05edbbfe2..966f2650b6ab 100644 --- a/arch/x86/include/asm/kvm_host.h +++ b/arch/x86/include/asm/kvm_host.h @@ -230,7 +230,6 @@ struct kvm_mmu_page { #endif int write_flooding_count; - bool mmio_cached; }; struct kvm_pio_request { diff --git a/arch/x86/kvm/mmu.c b/arch/x86/kvm/mmu.c index c2121017f471..7113a0fb544c 100644 --- a/arch/x86/kvm/mmu.c +++ b/arch/x86/kvm/mmu.c @@ -246,13 +246,11 @@ static unsigned int kvm_current_mmio_generation(struct kvm *kvm) static void mark_mmio_spte(struct kvm *kvm, u64 *sptep, u64 gfn, unsigned access) { - struct kvm_mmu_page *sp = page_header(__pa(sptep)); unsigned int gen = kvm_current_mmio_generation(kvm); u64 mask = generation_mmio_spte_mask(gen); access &= ACC_WRITE_MASK | ACC_USER_MASK; mask |= shadow_mmio_mask | access | gfn << PAGE_SHIFT; - sp->mmio_cached = true; trace_mark_mmio_spte(sptep, gfn, access, gen); mmu_spte_set(sptep, mask); @@ -4364,24 +4362,6 @@ void kvm_mmu_invalidate_zap_all_pages(struct kvm *kvm) spin_unlock(&kvm->mmu_lock); } -static void kvm_mmu_zap_mmio_sptes(struct kvm *kvm) -{ - struct kvm_mmu_page *sp, *node; - LIST_HEAD(invalid_list); - - spin_lock(&kvm->mmu_lock); -restart: - list_for_each_entry_safe(sp, node, &kvm->arch.active_mmu_pages, link) { - if (!sp->mmio_cached) - continue; - if (kvm_mmu_prepare_zap_page(kvm, sp, &invalid_list)) - goto restart; - } - - kvm_mmu_commit_zap_page(kvm, &invalid_list); - spin_unlock(&kvm->mmu_lock); -} - static bool kvm_has_zapped_obsolete_pages(struct kvm *kvm) { return unlikely(!list_empty_careful(&kvm->arch.zapped_obsolete_pages)); @@ -4397,7 +4377,7 @@ void kvm_mmu_invalidate_mmio_sptes(struct kvm *kvm) * when mark memslot invalid. */ if (unlikely(kvm_current_mmio_generation(kvm) >= (MMIO_MAX_GEN - 1))) - kvm_mmu_zap_mmio_sptes(kvm); + kvm_mmu_invalidate_zap_all_pages(kvm); } static int mmu_shrink(struct shrinker *shrink, struct shrink_control *sc) |