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| author | Avi Kivity <avi@qumranet.com> | 2007-06-07 19:18:30 +0300 |
|---|---|---|
| committer | Avi Kivity <avi@qumranet.com> | 2007-07-16 12:05:46 +0300 |
| commit | d9e368d61263055eceac2966bb7ea31b89da3425 (patch) | |
| tree | 9d507b851ea7bd667cdd50dde640e47e0d4773e9 /drivers/kvm/kvm.h | |
| parent | 39c3b86e5c193e09f69f0e99c93600a4999ffc60 (diff) | |
| download | lwn-d9e368d61263055eceac2966bb7ea31b89da3425.tar.gz lwn-d9e368d61263055eceac2966bb7ea31b89da3425.zip | |
KVM: Flush remote tlbs when reducing shadow pte permissions
When a vcpu causes a shadow tlb entry to have reduced permissions, it
must also clear the tlb on remote vcpus. We do that by:
- setting a bit on the vcpu that requests a tlb flush before the next entry
- if the vcpu is currently executing, we send an ipi to make sure it
exits before we continue
Signed-off-by: Avi Kivity <avi@qumranet.com>
Diffstat (limited to 'drivers/kvm/kvm.h')
| -rw-r--r-- | drivers/kvm/kvm.h | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/drivers/kvm/kvm.h b/drivers/kvm/kvm.h index 528a56b1790e..b08272bce213 100644 --- a/drivers/kvm/kvm.h +++ b/drivers/kvm/kvm.h @@ -84,6 +84,11 @@ #define KVM_PIO_PAGE_OFFSET 1 /* + * vcpu->requests bit members + */ +#define KVM_TLB_FLUSH 0 + +/* * Address types: * * gva - guest virtual address @@ -272,6 +277,8 @@ struct kvm_vcpu { u64 host_tsc; struct kvm_run *run; int interrupt_window_open; + int guest_mode; + unsigned long requests; unsigned long irq_summary; /* bit vector: 1 per word in irq_pending */ #define NR_IRQ_WORDS KVM_IRQ_BITMAP_SIZE(unsigned long) unsigned long irq_pending[NR_IRQ_WORDS]; @@ -530,6 +537,7 @@ void save_msrs(struct vmx_msr_entry *e, int n); void kvm_resched(struct kvm_vcpu *vcpu); void kvm_load_guest_fpu(struct kvm_vcpu *vcpu); void kvm_put_guest_fpu(struct kvm_vcpu *vcpu); +void kvm_flush_remote_tlbs(struct kvm *kvm); int kvm_read_guest(struct kvm_vcpu *vcpu, gva_t addr, |