search for: vcpu_thread

...ols/testing/selftests/kvm/x86_64/kvmi_test.c b/tools/testing/selftests/kvm/x86_64/kvmi_test.c index 090cb7acd2ed..cf5edf91197d 100644 --- a/tools/testing/selftests/kvm/x86_64/kvmi_test.c +++ b/tools/testing/selftests/kvm/x86_64/kvmi_test.c @@ -738,6 +738,14 @@ static void stop_vcpu_worker(pthread_t vcpu_thread, wait_vcpu_worker(vcpu_thread); } +static int __do_vcpu_command(struct kvm_vm *vm, int cmd_id, + struct kvmi_msg_hdr *req, size_t req_size, + void *rpl, size_t rpl_size) +{ + send_message(cmd_id, req, req_size); + return receive_cmd_reply(req, rpl, rpl_size); +} + static int do_...

...ols/testing/selftests/kvm/x86_64/kvmi_test.c b/tools/testing/selftests/kvm/x86_64/kvmi_test.c index 0803d7e5af1e..967ea568d93c 100644 --- a/tools/testing/selftests/kvm/x86_64/kvmi_test.c +++ b/tools/testing/selftests/kvm/x86_64/kvmi_test.c @@ -829,6 +829,14 @@ static void stop_vcpu_worker(pthread_t vcpu_thread, wait_vcpu_worker(vcpu_thread); } +static int __do_vcpu_command(struct kvm_vm *vm, int cmd_id, + struct kvmi_msg_hdr *req, size_t req_size, + void *rpl, size_t rpl_size) +{ + send_message(cmd_id, req, req_size); + return receive_cmd_reply(req, rpl, rpl_size); +} + static int do_...

...id; @@ -550,7 +556,7 @@ static void *vcpu_worker(void *data) run = vcpu_state(ctx->vm, ctx->vcpu_id); - while (!ctx->stop) { + while (!READ_ONCE(ctx->stop)) { struct ucall uc; vcpu_run(ctx->vm, ctx->vcpu_id); @@ -589,7 +595,7 @@ static void wait_vcpu_worker(pthread_t vcpu_thread) static void stop_vcpu_worker(pthread_t vcpu_thread, struct vcpu_worker_data *data) { - data->stop = true; + WRITE_ONCE(data->stop, true); wait_vcpu_worker(vcpu_thread); } @@ -673,9 +679,47 @@ static void pause_vcpu(struct kvm_vm *vm) -r, kvm_strerror(-r)); } +static voi...

...atic void test_event_xsetbv(struct kvm_vm *vm) +{ + struct vcpu_worker_data data = { + .vm = vm, + .vcpu_id = VCPU_ID, + .test_id = GUEST_TEST_XSETBV, + }; + __u16 event_id = KVMI_EVENT_XSETBV; + struct kvm_cpuid_entry2 *entry; + struct vcpu_reply rpl = {}; + struct kvmi_msg_hdr hdr; + pthread_t vcpu_thread; + struct kvmi_event ev; + + entry = kvm_get_supported_cpuid_entry(1); + if (!(entry->ecx & X86_FEATURE_XSAVE)) { + DEBUG("XSAVE is not supported, ecx 0x%x, skipping xsetbv test\n", + entry->ecx); + return; + } + + enable_vcpu_event(vm, event_id); + + vcpu_thread = start_vcp...

...atic void test_event_xsetbv(struct kvm_vm *vm) +{ + struct vcpu_worker_data data = { + .vm = vm, + .vcpu_id = VCPU_ID, + .test_id = GUEST_TEST_XSETBV, + }; + __u16 event_id = KVMI_EVENT_XSETBV; + struct kvm_cpuid_entry2 *entry; + struct vcpu_reply rpl = {}; + struct kvmi_msg_hdr hdr; + pthread_t vcpu_thread; + struct { + struct kvmi_event common; + struct kvmi_event_xsetbv xsetbv; + } ev; + + entry = kvm_get_supported_cpuid_entry(1); + if (!(entry->ecx & X86_FEATURE_XSAVE)) { + print_skip("XSAVE not supported, ecx 0x%x", entry->ecx); + return; + } + + enable_vcpu_event(vm, even...

...tatic void test_event_hypercall(struct kvm_vm *vm) +{ + struct vcpu_worker_data data = { + .vm = vm, + .vcpu_id = VCPU_ID, + .test_id = GUEST_TEST_HYPERCALL, + }; + struct kvmi_msg_hdr hdr; + struct kvmi_event ev; + struct vcpu_reply rpl = {}; + __u16 event_id = KVMI_EVENT_HYPERCALL; + pthread_t vcpu_thread; + + enable_vcpu_event(vm, event_id); + + vcpu_thread = start_vcpu_worker(&data); + + receive_event(&hdr, &ev, sizeof(ev), event_id); + + DEBUG("Hypercall event, rip 0x%llx\n", + ev.arch.regs.rip); + + reply_to_event(&hdr, &ev, KVMI_EVENT_ACTION_CONTINUE, + &rpl...

...ruct kvmi_msg_hdr hdr; + struct { + struct kvmi_event common; + struct kvmi_event_msr msr; + } ev; + struct { + struct vcpu_reply common; + struct kvmi_event_msr_reply msr; + } rpl = {}; + __u16 event_id = KVMI_EVENT_MSR; + __u32 msr = MSR_MISC_FEATURES_ENABLES; + uint64_t msr_data; + pthread_t vcpu_thread; + + enable_msr_events(vm, msr); + + vcpu_thread = start_vcpu_worker(&data); + + receive_event(&hdr, &ev.common, sizeof(ev), event_id); + + DEBUG("MSR 0x%x, old 0x%llx, new 0x%llx\n", + ev.msr.msr, ev.msr.old_value, ev.msr.new_value); + + TEST_ASSERT(ev.msr.msr == msr, + &qu...

...val, enable, no_padding, expected_err); +} + +static void test_cmd_vcpu_control_msr(struct kvm_vm *vm) +{ + struct vcpu_worker_data data = { + .vm = vm, + .vcpu_id = VCPU_ID, + .test_id = GUEST_TEST_MSR, + }; + __u16 event_id = KVMI_EVENT_MSR; + __u32 msr = MSR_MISC_FEATURES_ENABLES; + pthread_t vcpu_thread; + uint64_t msr_data; + __u64 old_value; + + enable_msr_events(vm, msr); + + vcpu_thread = start_vcpu_worker(&data); + + handle_msr_event(vm, event_id, msr, &old_value); + + stop_vcpu_worker(vcpu_thread, &data); + + disable_msr_events(vm, msr); + + msr_data = vcpu_get_msr(vm, VCPU_ID, m...

...EST_TEST_CR, + }; + struct kvmi_msg_hdr hdr; + struct { + struct kvmi_event common; + struct kvmi_event_cr cr; + } ev; + struct { + struct vcpu_reply common; + struct kvmi_event_cr_reply cr; + } rpl = {}; + __u16 event_id = KVMI_EVENT_CR; + __u32 cr_no = 4; + struct kvm_sregs sregs; + pthread_t vcpu_thread; + + enable_cr_events(vm, cr_no); + + vcpu_thread = start_vcpu_worker(&data); + + receive_event(&hdr, &ev.common, sizeof(ev), event_id); + + DEBUG("CR%u, old 0x%llx, new 0x%llx\n", + ev.cr.cr, ev.cr.old_value, ev.cr.new_value); + + TEST_ASSERT(ev.cr.cr == cr_no, + "Unex...

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

...t.c b/tools/testing/selftests/kvm/x86_64/kvmi_test.c index ffd0337d0567..7269afd4c36d 100644 --- a/tools/testing/selftests/kvm/x86_64/kvmi_test.c +++ b/tools/testing/selftests/kvm/x86_64/kvmi_test.c @@ -1033,6 +1033,39 @@ static void test_cmd_vcpu_set_registers(struct kvm_vm *vm) stop_vcpu_worker(vcpu_thread, &data); } +static int cmd_vcpu_get_cpuid(struct kvm_vm *vm, + __u32 function, __u32 index, + struct kvmi_vcpu_get_cpuid_reply *rpl) +{ + struct { + struct kvmi_msg_hdr hdr; + struct kvmi_vcpu_hdr vcpu_hdr; + struct kvmi_vcpu_get_cpuid cmd; + } req = {}; + + req.cmd.functi...

...d disallow_event(struct kvm_vm *vm, __s32 event_id) +{ + toggle_event_permission(vm, event_id, false); +} + static void allow_event(struct kvm_vm *vm, __s32 event_id) { toggle_event_permission(vm, event_id, true); @@ -722,6 +727,82 @@ static void test_pause(struct kvm_vm *vm) stop_vcpu_worker(vcpu_thread, &data); } +static int cmd_vcpu_control_event(struct kvm_vm *vm, __u16 event_id, + bool enable) +{ + struct { + struct kvmi_msg_hdr hdr; + struct kvmi_vcpu_hdr vcpu_hdr; + struct kvmi_vcpu_control_events cmd; + } req = {}; + + req.cmd.event_id = event_id; + req.cmd.enable = enable ?...

This patch series is based on the VM introspection patches (https://lore.kernel.org/kvm/20200721210922.7646-1-alazar at bitdefender.com/), extending the introspection API with EPT Views and Virtualization Exceptions (#VE) support. The purpose of this series is to get an initial feedback and to see if we are on the right track, especially because the changes made to add the EPT views are not small