diff options
Diffstat (limited to 'drivers/kvm/mmu.c')
| -rw-r--r-- | drivers/kvm/mmu.c | 36 |
1 files changed, 36 insertions, 0 deletions
diff --git a/drivers/kvm/mmu.c b/drivers/kvm/mmu.c index d9c5950cfae..ace3cb86214 100644 --- a/drivers/kvm/mmu.c +++ b/drivers/kvm/mmu.c @@ -1347,6 +1347,42 @@ void __kvm_mmu_free_some_pages(struct kvm_vcpu *vcpu) } } +int kvm_mmu_page_fault(struct kvm_vcpu *vcpu, gva_t cr2, u32 error_code) +{ + int r; + enum emulation_result er; + + mutex_lock(&vcpu->kvm->lock); + r = vcpu->mmu.page_fault(vcpu, cr2, error_code); + if (r < 0) + goto out; + + if (!r) { + r = 1; + goto out; + } + + er = emulate_instruction(vcpu, vcpu->run, cr2, error_code, 0); + mutex_unlock(&vcpu->kvm->lock); + + switch (er) { + case EMULATE_DONE: + return 1; + case EMULATE_DO_MMIO: + ++vcpu->stat.mmio_exits; + return 0; + case EMULATE_FAIL: + kvm_report_emulation_failure(vcpu, "pagetable"); + return 1; + default: + BUG(); + } +out: + mutex_unlock(&vcpu->kvm->lock); + return r; +} +EXPORT_SYMBOL_GPL(kvm_mmu_page_fault); + static void free_mmu_pages(struct kvm_vcpu *vcpu) { struct kvm_mmu_page *page; |