search for: kvm_mmu_page_fault

...ction. > > This optimization should be disabled only when the VM is introspected, > not just because the introspection subsystem is present. > > Signed-off-by: Adalbert Laz?r <alazar at bitdefender.com> The right thing to do is to not set gpa_available for fetch failures in kvm_mmu_page_fault instead: diff --git a/arch/x86/kvm/mmu.c b/arch/x86/kvm/mmu.c index 24843cf49579..1bdca40fa831 100644 --- a/arch/x86/kvm/mmu.c +++ b/arch/x86/kvm/mmu.c @@ -5364,8 +5364,12 @@ int kvm_mmu_page_fault(struct kvm_vcpu *vcpu, gva_t cr2, u64 error_code, enum emulation_result er; bool direct = vcpu-&...

...abled only when the VM is introspected, >>> not just because the introspection subsystem is present. >>> >>> Signed-off-by: Adalbert Laz?r <alazar at bitdefender.com> >> >> The right thing to do is to not set gpa_available for fetch failures in >> kvm_mmu_page_fault instead: >> >> diff --git a/arch/x86/kvm/mmu.c b/arch/x86/kvm/mmu.c >> index 24843cf49579..1bdca40fa831 100644 >> --- a/arch/x86/kvm/mmu.c >> +++ b/arch/x86/kvm/mmu.c >> @@ -5364,8 +5364,12 @@ int kvm_mmu_page_fault(struct kvm_vcpu *vcpu, gva_t cr2, u64 error_cod...

.../2.6.18-194.32.1.el5/weak-updates/kmod-kvm/kvm-amd.ko needs unknown symbol kvm_get_cs_db_l_bits WARNING: /lib/modules/2.6.18-194.32.1.el5/weak-updates/kmod-kvm/kvm-amd.ko needs unknown symbol kvm_set_cr0 WARNING: /lib/modules/2.6.18-194.32.1.el5/weak-updates/kmod-kvm/kvm-amd.ko needs unknown symbol kvm_mmu_page_fault WARNING: /lib/modules/2.6.18-194.32.1.el5/weak-updates/kmod-kvm/kvm-amd.ko needs unknown symbol kvm_lapic_set_tpr WARNING: /lib/modules/2.6.18-194.32.1.el5/weak-updates/kmod-kvm/kvm-amd.ko needs unknown symbol kvm_mmu_reset_context WARNING: /lib/modules/2.6.18-194.32.1.el5/weak-updates/kmod-kvm/kvm...

...t bitdefender.com> --- arch/x86/kvm/mmu/mmu.c | 9 +++++++-- 1 file changed, 7 insertions(+), 2 deletions(-) diff --git a/arch/x86/kvm/mmu/mmu.c b/arch/x86/kvm/mmu/mmu.c index 5f0ddc6b67de..d28b7425c4f1 100644 --- a/arch/x86/kvm/mmu/mmu.c +++ b/arch/x86/kvm/mmu/mmu.c @@ -5636,8 +5636,13 @@ int kvm_mmu_page_fault(struct kvm_vcpu *vcpu, gva_t cr2, u64 error_code, int r, emulation_type = 0; bool direct = vcpu->arch.mmu->direct_map; - /* With shadow page tables, fault_address contains a GVA or nGPA. */ - if (vcpu->arch.mmu->direct_map) { + /* + * With shadow page tables, fault_address conta...

...|= (exit_qualification & 0x100) != 0 ? - PFERR_GUEST_FINAL_MASK : PFERR_GUEST_PAGE_MASK; + error_code |= (exit_qualification & EPT_VIOLATION_GVA_TRANSLATED) + ? PFERR_GUEST_FINAL_MASK : PFERR_GUEST_PAGE_MASK; vcpu->arch.exit_qualification = exit_qualification; return kvm_mmu_page_fault(vcpu, gpa, error_code, NULL, 0);

...ction(struct kvm_vcpu *vcpu, int emulation_type); int kvm_emulate_instruction_from_buffer(struct kvm_vcpu *vcpu, diff --git a/arch/x86/kvm/mmu/mmu.c b/arch/x86/kvm/mmu/mmu.c index da57321e0cec..4df5b729e2c5 100644 --- a/arch/x86/kvm/mmu/mmu.c +++ b/arch/x86/kvm/mmu/mmu.c @@ -5566,6 +5566,14 @@ int kvm_mmu_page_fault(struct kvm_vcpu *vcpu, gpa_t cr2_or_gpa, u64 error_code, */ if (!mmio_info_in_cache(vcpu, cr2_or_gpa, direct) && !is_guest_mode(vcpu)) emulation_type |= EMULTYPE_ALLOW_RETRY_PF; + + /* + * With shadow page tables, fault_address contains a GVA or nGPA. + * On a fetch fault, fault_a...

The KVM introspection subsystem provides a facility for applications running on the host or in a separate VM, to control the execution of other VM-s (pause, resume, shutdown), query the state of the vCPUs (GPRs, MSRs etc.), alter the page access bits in the shadow page tables (only for the hardware backed ones, eg. Intel's EPT) and receive notifications when events of interest have taken place

The KVM introspection subsystem provides a facility for applications running on the host or in a separate VM, to control the execution of other VM-s (pause, resume, shutdown), query the state of the vCPUs (GPRs, MSRs etc.), alter the page access bits in the shadow page tables (only for the hardware backed ones, eg. Intel's EPT) and receive notifications when events of interest have taken place

The KVM introspection subsystem provides a facility for applications running on the host or in a separate VM, to control the execution of other VMs (pause, resume, shutdown), query the state of the vCPUs (GPRs, MSRs etc.), alter the page access bits in the shadow page tables (only for the hardware backed ones, eg. Intel's EPT) and receive notifications when events of interest have taken place

The KVM introspection subsystem provides a facility for applications running on the host or in a separate VM, to control the execution of other VMs (pause, resume, shutdown), query the state of the vCPUs (GPRs, MSRs etc.), alter the page access bits in the shadow page tables (only for the hardware backed ones, eg. Intel's EPT) and receive notifications when events of interest have taken place