KVM: Replace page fault injection by the generalized exception queue

Signed-off-by: Avi Kivity <avi@qumranet.com>

diff --git a/drivers/kvm/mmu.c b/drivers/kvm/mmu.c
index 9b9d1b6eb2f8192b9ffec75ca60120e39aea021e..62a74151f84798f1c103a775c397ba32130a5eac 100644 (file)
--- a/drivers/kvm/mmu.c
+++ b/drivers/kvm/mmu.c
@@ -1081,7 +1081,7 @@ static void inject_page_fault(struct kvm_vcpu *vcpu,
                              u64 addr,
                              u32 err_code)
 {
-       kvm_x86_ops->inject_page_fault(vcpu, addr, err_code);
+       kvm_inject_page_fault(vcpu, addr, err_code);
 }
 
 static void paging_free(struct kvm_vcpu *vcpu)

diff --git a/drivers/kvm/svm.c b/drivers/kvm/svm.c
index 87072c647f286207c45e047630a06a91ec8cd3be..aa8e90b404a02dd61c16b3f4310610f620cd99a7 100644 (file)
--- a/drivers/kvm/svm.c
+++ b/drivers/kvm/svm.c
@@ -225,12 +225,6 @@ static void inject_ud(struct kvm_vcpu *vcpu)
                                                UD_VECTOR;
 }
 
-static int is_page_fault(uint32_t info)
-{
-       info &= SVM_EVTINJ_VEC_MASK | SVM_EVTINJ_TYPE_MASK | SVM_EVTINJ_VALID;
-       return info == (PF_VECTOR | SVM_EVTINJ_VALID | SVM_EVTINJ_TYPE_EXEPT);
-}
-
 static int is_external_interrupt(u32 info)
 {
        info &= SVM_EVTINJ_TYPE_MASK | SVM_EVTINJ_VALID;
@@ -1624,34 +1618,6 @@ static void svm_set_cr3(struct kvm_vcpu *vcpu, unsigned long root)
        }
 }
 
-static void svm_inject_page_fault(struct kvm_vcpu *vcpu,
-                                 unsigned long  addr,
-                                 uint32_t err_code)
-{
-       struct vcpu_svm *svm = to_svm(vcpu);
-       uint32_t exit_int_info = svm->vmcb->control.exit_int_info;
-
-       ++vcpu->stat.pf_guest;
-
-       if (is_page_fault(exit_int_info)) {
-
-               svm->vmcb->control.event_inj_err = 0;
-               svm->vmcb->control.event_inj =  SVM_EVTINJ_VALID |
-                                               SVM_EVTINJ_VALID_ERR |
-                                               SVM_EVTINJ_TYPE_EXEPT |
-                                               DF_VECTOR;
-               return;
-       }
-       vcpu->cr2 = addr;
-       svm->vmcb->save.cr2 = addr;
-       svm->vmcb->control.event_inj =  SVM_EVTINJ_VALID |
-                                       SVM_EVTINJ_VALID_ERR |
-                                       SVM_EVTINJ_TYPE_EXEPT |
-                                       PF_VECTOR;
-       svm->vmcb->control.event_inj_err = err_code;
-}
-
-
 static int is_disabled(void)
 {
        u64 vm_cr;
@@ -1721,7 +1687,6 @@ static struct kvm_x86_ops svm_x86_ops = {
        .set_rflags = svm_set_rflags,
 
        .tlb_flush = svm_flush_tlb,
-       .inject_page_fault = svm_inject_page_fault,
 
        .inject_gp = svm_inject_gp,
 

diff --git a/drivers/kvm/vmx.c b/drivers/kvm/vmx.c
index f382956f176a149cd7b56ee06f8b52fa764de745..be0b12e709e532ec7cfdf535e7d9e72c8ab14a21 100644 (file)
--- a/drivers/kvm/vmx.c
+++ b/drivers/kvm/vmx.c
@@ -2487,37 +2487,6 @@ static void vmx_vcpu_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
                asm("int $2");
 }
 
-static void vmx_inject_page_fault(struct kvm_vcpu *vcpu,
-                                 unsigned long addr,
-                                 u32 err_code)
-{
-       struct vcpu_vmx *vmx = to_vmx(vcpu);
-       u32 vect_info = vmx->idt_vectoring_info;
-
-       ++vcpu->stat.pf_guest;
-
-       if (is_page_fault(vect_info)) {
-               printk(KERN_DEBUG "inject_page_fault: "
-                      "double fault 0x%lx @ 0x%lx\n",
-                      addr, vmcs_readl(GUEST_RIP));
-               vmcs_write32(VM_ENTRY_EXCEPTION_ERROR_CODE, 0);
-               vmcs_write32(VM_ENTRY_INTR_INFO_FIELD,
-                            DF_VECTOR |
-                            INTR_TYPE_EXCEPTION |
-                            INTR_INFO_DELIEVER_CODE_MASK |
-                            INTR_INFO_VALID_MASK);
-               return;
-       }
-       vcpu->cr2 = addr;
-       vmcs_write32(VM_ENTRY_EXCEPTION_ERROR_CODE, err_code);
-       vmcs_write32(VM_ENTRY_INTR_INFO_FIELD,
-                    PF_VECTOR |
-                    INTR_TYPE_EXCEPTION |
-                    INTR_INFO_DELIEVER_CODE_MASK |
-                    INTR_INFO_VALID_MASK);
-
-}
-
 static void vmx_free_vmcs(struct kvm_vcpu *vcpu)
 {
        struct vcpu_vmx *vmx = to_vmx(vcpu);
@@ -2649,7 +2618,6 @@ static struct kvm_x86_ops vmx_x86_ops = {
        .set_rflags = vmx_set_rflags,
 
        .tlb_flush = vmx_flush_tlb,
-       .inject_page_fault = vmx_inject_page_fault,
 
        .inject_gp = vmx_inject_gp,
 

diff --git a/drivers/kvm/x86.c b/drivers/kvm/x86.c
index 11440d12a2d3cc34ea11c8d07a62c54c83b95e8f..dc007a32a8839a0b6dc18fe1b1119ed2e5282b13 100644 (file)
--- a/drivers/kvm/x86.c
+++ b/drivers/kvm/x86.c
@@ -142,6 +142,21 @@ void kvm_queue_exception(struct kvm_vcpu *vcpu, unsigned nr)
 }
 EXPORT_SYMBOL_GPL(kvm_queue_exception);
 
+void kvm_inject_page_fault(struct kvm_vcpu *vcpu, unsigned long addr,
+                          u32 error_code)
+{
+       ++vcpu->stat.pf_guest;
+       if (vcpu->exception.pending && vcpu->exception.nr == PF_VECTOR) {
+               printk(KERN_DEBUG "kvm: inject_page_fault:"
+                      " double fault 0x%lx\n", addr);
+               vcpu->exception.nr = DF_VECTOR;
+               vcpu->exception.error_code = 0;
+               return;
+       }
+       vcpu->cr2 = addr;
+       kvm_queue_exception_e(vcpu, PF_VECTOR, error_code);
+}
+
 void kvm_queue_exception_e(struct kvm_vcpu *vcpu, unsigned nr, u32 error_code)
 {
        WARN_ON(vcpu->exception.pending);
@@ -1601,7 +1616,7 @@ static int emulator_write_emulated_onepage(unsigned long addr,
        gpa_t                 gpa = vcpu->mmu.gva_to_gpa(vcpu, addr);
 
        if (gpa == UNMAPPED_GVA) {
-               kvm_x86_ops->inject_page_fault(vcpu, addr, 2);
+               kvm_inject_page_fault(vcpu, addr, 2);
                return X86EMUL_PROPAGATE_FAULT;
        }
 

diff --git a/drivers/kvm/x86.h b/drivers/kvm/x86.h
index 1e71668694ea88307db26a41eafd5b0a4ec85093..d3ac4e2b3a411b0f7569dc88b63609ccb83c97d0 100644 (file)
--- a/drivers/kvm/x86.h
+++ b/drivers/kvm/x86.h
@@ -219,8 +219,6 @@ struct kvm_x86_ops {
        void (*set_rflags)(struct kvm_vcpu *vcpu, unsigned long rflags);
 
        void (*tlb_flush)(struct kvm_vcpu *vcpu);
-       void (*inject_page_fault)(struct kvm_vcpu *vcpu,
-                                 unsigned long addr, u32 err_code);
 
        void (*inject_gp)(struct kvm_vcpu *vcpu, unsigned err_code);
 
@@ -306,6 +304,8 @@ int kvm_set_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 data);
 
 void kvm_queue_exception(struct kvm_vcpu *vcpu, unsigned nr);
 void kvm_queue_exception_e(struct kvm_vcpu *vcpu, unsigned nr, u32 error_code);
+void kvm_inject_page_fault(struct kvm_vcpu *vcpu, unsigned long cr2,
+                          u32 error_code);
 
 void fx_init(struct kvm_vcpu *vcpu);