search for: gpa_available

On 09/08/19 18:00, Adalbert Laz?r wrote: > If the EPT violation was caused by an execute restriction imposed by the > introspection tool, gpa_available will point to the instruction pointer, > not the to the read/write location that has to be used to emulate the > current instruction. > > This optimization should be disabled only when the VM is introspected, > not just because the introspection subsystem is present. > > Sign...

...13/08/19 16:33, Adalbert Laz?r wrote: > On Tue, 13 Aug 2019 10:47:34 +0200, Paolo Bonzini <pbonzini at redhat.com> wrote: >> On 09/08/19 18:00, Adalbert Laz?r wrote: >>> If the EPT violation was caused by an execute restriction imposed by the >>> introspection tool, gpa_available will point to the instruction pointer, >>> not the to the read/write location that has to be used to emulate the >>> current instruction. >>> >>> This optimization should be disabled only when the VM is introspected, >>> not just because the introspectio...

If the EPT violation was caused by an execute restriction imposed by the introspection tool, gpa_available will point to the instruction pointer, not the to the read/write location that has to be used to emulate the current instruction. 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 <alaza...

...les, fault_address contains a GVA or nGPA. + * On a fetch fault, fault_address contains the instruction pointer. + */ + if (vcpu->arch.mmu->direct_map && + likely(!(error_code & PFERR_FETCH_MASK)) && + (error_code & PFERR_GUEST_FINAL_MASK)) { vcpu->arch.gpa_available = true; vcpu->arch.gpa_val = cr2; }

...704e0f89..8a119fb7c623 100644 --- a/arch/x86/include/asm/kvm_host.h +++ b/arch/x86/include/asm/kvm_host.h @@ -1436,6 +1436,10 @@ extern u64 kvm_mce_cap_supported; * retry native execution under certain conditions, * Can only be set in conjunction with EMULTYPE_PF. * + * EMULTYPE_GPA_AVAILABLE_PF - Set when the emulator can avoid a page walk + * to get the GPA. + * Can only be set in conjunction with EMULTYPE_PF. + * * EMULTYPE_TRAP_UD_FORCED - Set when emulating an intercepted #UD that was * triggered by KVM's magic &quo...

...E_VCPU kvm: x86: add kvm_arch_vcpu_set_guest_debug() kvm: introspection: add custom input when single-stepping a vCPU kvm: x86: keep the page protected if tracked by the introspection tool kvm: x86: filter out access rights only when tracked by the introspection tool kvm: x86: disable gpa_available optimization in emulator_read_write_onepage() kvm: x86: disable EPT A/D bits if introspection is present kvm: introspection: add trace functions Marian Rotariu (1): kvm: introspection: add KVMI_GET_CPUID Mihai Don?u (47): kvm: introduce KVMI (VM introspection subsystem) kvm: introsp...

...E_VCPU kvm: x86: add kvm_arch_vcpu_set_guest_debug() kvm: introspection: add custom input when single-stepping a vCPU kvm: x86: keep the page protected if tracked by the introspection tool kvm: x86: filter out access rights only when tracked by the introspection tool kvm: x86: disable gpa_available optimization in emulator_read_write_onepage() kvm: x86: disable EPT A/D bits if introspection is present kvm: introspection: add trace functions Marian Rotariu (1): kvm: introspection: add KVMI_GET_CPUID Mihai Don?u (47): kvm: introduce KVMI (VM introspection subsystem) kvm: introsp...

...ENT_MSR KVM: introspection: add KVMI_VM_SET_PAGE_ACCESS KVM: introspection: add KVMI_EVENT_PF KVM: introspection: emulate a guest page table walk on SPT violations due to A/D bit updates KVM: x86: call the page tracking code on emulation failure Mircea C?rjaliu (2): KVM: x86: disable gpa_available optimization for fetch and page-walk NPF/EPT violations KVM: introspection: add vCPU related data Nicu?or C??u (19): KVM: x86: add kvm_arch_vcpu_set_regs() KVM: x86: add .bp_intercepted() to struct kvm_x86_ops KVM: x86: add .cr3_write_intercepted() KVM: x86: add .desc_intercepted()...

...ENT_MSR KVM: introspection: add KVMI_VM_SET_PAGE_ACCESS KVM: introspection: add KVMI_EVENT_PF KVM: introspection: emulate a guest page table walk on SPT violations due to A/D bit updates KVM: x86: call the page tracking code on emulation failure Mircea C?rjaliu (2): KVM: x86: disable gpa_available optimization for fetch and page-walk SPT violations KVM: introspection: add vCPU related data Nicu?or C??u (21): KVM: x86: add kvm_arch_vcpu_set_regs() KVM: x86: add .bp_intercepted() to struct kvm_x86_ops KVM: x86: add .cr3_write_intercepted() KVM: svm: add support for descriptor-ta...