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Date: Tue, 15 Jul 2008 15:12:35 +0300 From: Avi Kivity <avi@...ranet.com> To: kvm@...r.kernel.org Cc: linux-kernel@...r.kernel.org, Marcelo Tosatti <mtosatti@...hat.com> Subject: [PATCH 16/19] KVM: MMU: nuke shadowed pgtable pages and ptes on memslot destruction From: Marcelo Tosatti <mtosatti@...hat.com> Flush the shadow mmu before removing regions to avoid stale entries. Signed-off-by: Marcelo Tosatti <mtosatti@...hat.com> Signed-off-by: Avi Kivity <avi@...ranet.com> --- arch/ia64/kvm/kvm-ia64.c | 3 +++ arch/powerpc/kvm/powerpc.c | 4 ++++ arch/s390/kvm/kvm-s390.c | 4 ++++ arch/x86/kvm/x86.c | 5 +++++ include/linux/kvm_host.h | 1 + virt/kvm/kvm_main.c | 3 +++ 6 files changed, 20 insertions(+), 0 deletions(-) diff --git a/arch/ia64/kvm/kvm-ia64.c b/arch/ia64/kvm/kvm-ia64.c index a4cf4a2..608860c 100644 --- a/arch/ia64/kvm/kvm-ia64.c +++ b/arch/ia64/kvm/kvm-ia64.c @@ -1455,6 +1455,9 @@ int kvm_arch_set_memory_region(struct kvm *kvm, return 0; } +void kvm_arch_flush_shadow(struct kvm *kvm) +{ +} long kvm_arch_dev_ioctl(struct file *filp, unsigned int ioctl, unsigned long arg) diff --git a/arch/powerpc/kvm/powerpc.c b/arch/powerpc/kvm/powerpc.c index b850d24..53826a5 100644 --- a/arch/powerpc/kvm/powerpc.c +++ b/arch/powerpc/kvm/powerpc.c @@ -170,6 +170,10 @@ int kvm_arch_set_memory_region(struct kvm *kvm, return 0; } +void kvm_arch_flush_shadow(struct kvm *kvm) +{ +} + struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm, unsigned int id) { struct kvm_vcpu *vcpu; diff --git a/arch/s390/kvm/kvm-s390.c b/arch/s390/kvm/kvm-s390.c index 399acf3..1782cbc 100644 --- a/arch/s390/kvm/kvm-s390.c +++ b/arch/s390/kvm/kvm-s390.c @@ -675,6 +675,10 @@ int kvm_arch_set_memory_region(struct kvm *kvm, return 0; } +void kvm_arch_flush_shadow(struct kvm *kvm) +{ +} + gfn_t unalias_gfn(struct kvm *kvm, gfn_t gfn) { return gfn; diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c index 200e215..8e410ed 100644 --- a/arch/x86/kvm/x86.c +++ b/arch/x86/kvm/x86.c @@ -4032,6 +4032,11 @@ int kvm_arch_set_memory_region(struct kvm *kvm, return 0; } +void kvm_arch_flush_shadow(struct kvm *kvm) +{ + kvm_mmu_zap_all(kvm); +} + int kvm_arch_vcpu_runnable(struct kvm_vcpu *vcpu) { return vcpu->arch.mp_state == KVM_MP_STATE_RUNNABLE diff --git a/include/linux/kvm_host.h b/include/linux/kvm_host.h index d220b49..07d68a8 100644 --- a/include/linux/kvm_host.h +++ b/include/linux/kvm_host.h @@ -168,6 +168,7 @@ int kvm_arch_set_memory_region(struct kvm *kvm, struct kvm_userspace_memory_region *mem, struct kvm_memory_slot old, int user_alloc); +void kvm_arch_flush_shadow(struct kvm *kvm); gfn_t unalias_gfn(struct kvm *kvm, gfn_t gfn); struct page *gfn_to_page(struct kvm *kvm, gfn_t gfn); unsigned long gfn_to_hva(struct kvm *kvm, gfn_t gfn); diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c index b90da0b..c459383 100644 --- a/virt/kvm/kvm_main.c +++ b/virt/kvm/kvm_main.c @@ -405,6 +405,9 @@ int __kvm_set_memory_region(struct kvm *kvm, if (mem->slot >= kvm->nmemslots) kvm->nmemslots = mem->slot + 1; + if (!npages) + kvm_arch_flush_shadow(kvm); + *memslot = new; r = kvm_arch_set_memory_region(kvm, mem, old, user_alloc); -- 1.5.6.1 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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