From: Mihai Donțu <mdontu@xxxxxxxxxxxxxxx>
The KVMI_VCPU_INJECT_EXCEPTION command is used by the introspection tool
to inject exceptions, for example, to get a page from swap.
The exception is queued right before entering the guest unless there is
already an exception pending. The introspection tool is notified with
an KVMI_EVENT_TRAP event about the success of the injection. In case
of failure, the introspecion tool is expected to try again later.
Signed-off-by: Mihai Donțu <mdontu@xxxxxxxxxxxxxxx>
Co-developed-by: Nicușor Cîțu <ncitu@xxxxxxxxxxxxxxx>
Signed-off-by: Nicușor Cîțu <ncitu@xxxxxxxxxxxxxxx>
Co-developed-by: Adalbert Lazăr <alazar@xxxxxxxxxxxxxxx>
Signed-off-by: Adalbert Lazăr <alazar@xxxxxxxxxxxxxxx>
---
Documentation/virt/kvm/kvmi.rst | 74 ++++++++++++
arch/x86/include/uapi/asm/kvmi.h | 14 +++
arch/x86/kvm/kvmi.c | 103 +++++++++++++++++
arch/x86/kvm/x86.c | 3 +
include/linux/kvmi_host.h | 12 ++
include/uapi/linux/kvmi.h | 16 +--
.../testing/selftests/kvm/x86_64/kvmi_test.c | 109 +++++++++++++++++-
virt/kvm/introspection/kvmi.c | 46 ++++++++
virt/kvm/introspection/kvmi_int.h | 8 ++
virt/kvm/introspection/kvmi_msg.c | 81 +++++++++----
10 files changed, 433 insertions(+), 33 deletions(-)
diff --git a/Documentation/virt/kvm/kvmi.rst b/Documentation/virt/kvm/kvmi.rst
index c624ab59bd0e..d6a09fac4f52 100644
--- a/Documentation/virt/kvm/kvmi.rst
+++ b/Documentation/virt/kvm/kvmi.rst
@@ -557,6 +557,7 @@ The following vCPU events do not need to be enabled or disabled,
because these are sent as a result of certain commands::
KVMI_EVENT_PAUSE_VCPU
+ KVMI_EVENT_TRAP
However, the events mentioned above can be disallowed.
@@ -715,6 +716,46 @@ ID set.
* -KVM_EINVAL - the padding is not zero
* -KVM_EAGAIN - the selected vCPU can't be introspected yet
+15. KVMI_VCPU_INJECT_EXCEPTION
+------------------------------
+
+:Architectures: x86
+:Versions: >= 1
+:Parameters:
+
+::
+
+ struct kvmi_vcpu_hdr;
+ struct kvmi_vcpu_inject_exception {
+ __u8 nr;
+ __u8 padding1;
+ __u16 padding2;
+ __u32 error_code;
+ __u64 address;
+ };
+
+:Returns:
+
+::
+
+ struct kvmi_error_code
+
+Injects a vCPU exception with or without an error code. In case of page fault
+exception, the guest virtual address has to be specified.
+
+The *KVMI_EVENT_TRAP* event will be sent with the effective injected expection.
+
+:Errors:
+
+* -KVM_EPERM - the *KVMI_EVENT_TRAP* event is disallowed
+* -KVM_EINVAL - the selected vCPU is invalid
+* -KVM_EINVAL - the specified exception number is invalid
+* -KVM_EINVAL - the specified address is invalid
+* -KVM_EINVAL - the padding is not zero
+* -KVM_EAGAIN - the selected vCPU can't be introspected yet
+* -KVM_EBUSY - another *KVMI_VCPU_INJECT_EXCEPTION*-*KVMI_EVENT_TRAP* pair
+ is in progress
+
Events
======
@@ -925,3 +966,36 @@ register (see **KVMI_VCPU_CONTROL_EVENTS**).
``kvmi_event``, the control register number, the old value and the new value
are sent to the introspection tool. The *CONTINUE* action will set the ``new_val``.
+
+6. KVMI_EVENT_TRAP
+------------------
+
+:Architectures: x86
+:Versions: >= 1
+:Actions: CONTINUE, CRASH
+:Parameters:
+
+::
+
+ struct kvmi_event;
+ struct kvmi_event_trap {
+ __u32 vector;
+ __u32 error_code;
+ __u64 cr2;
+ };
+
+:Returns:
+
+::
+
+ struct kvmi_vcpu_hdr;
+ struct kvmi_event_reply;
+
+This event is sent if a previous *KVMI_VCPU_INJECT_EXCEPTION* command
+took place. Because it has a high priority, it will be sent before any
+other vCPU introspection event.
+
+``kvmi_event``, exception/interrupt number (vector), exception code
+(``error_code``) and CR2 are sent to the introspection tool,
+which should check if its exception has been injected or overridden.
+
diff --git a/arch/x86/include/uapi/asm/kvmi.h b/arch/x86/include/uapi/asm/kvmi.h
index a3d29557cc15..073dbaac06b1 100644
--- a/arch/x86/include/uapi/asm/kvmi.h
+++ b/arch/x86/include/uapi/asm/kvmi.h
@@ -83,4 +83,18 @@ struct kvmi_event_cr_reply {
__u64 new_val;
};
+struct kvmi_event_trap {
+ __u32 vector;
+ __u32 error_code;
+ __u64 cr2;
+};
+
+struct kvmi_vcpu_inject_exception {
+ __u8 nr;
+ __u8 padding1;
+ __u16 padding2;
+ __u32 error_code;
+ __u64 address;
+};
+
#endif /* _UAPI_ASM_X86_KVMI_H */
diff --git a/arch/x86/kvm/kvmi.c b/arch/x86/kvm/kvmi.c
index 281ebb47eaa2..9f8ef8a1a306 100644
--- a/arch/x86/kvm/kvmi.c
+++ b/arch/x86/kvm/kvmi.c
@@ -559,3 +559,106 @@ bool kvmi_cr3_intercepted(struct kvm_vcpu *vcpu)
return ret;
}
EXPORT_SYMBOL(kvmi_cr3_intercepted);
+
+int kvmi_arch_cmd_vcpu_inject_exception(struct kvm_vcpu *vcpu, u8 vector,
+ u32 error_code, u64 address)
+{
+ struct kvm_vcpu_introspection *vcpui = VCPUI(vcpu);
+ bool has_error;
+
+ if (vcpui->exception.pending || vcpui->exception.send_event)
+ return -KVM_EBUSY;
+
+ vcpui->exception.pending = true;
+
+ has_error = x86_exception_has_error_code(vector);
+
+ vcpui->exception.nr = vector;
+ vcpui->exception.error_code = has_error ? error_code : 0;
+ vcpui->exception.error_code_valid = has_error;
+ vcpui->exception.address = address;
+
+ return 0;
+}
+
+static void kvmi_arch_queue_exception(struct kvm_vcpu *vcpu)
+{
+ struct kvm_vcpu_introspection *vcpui = VCPUI(vcpu);
+ struct x86_exception e = {
+ .vector = vcpui->exception.nr,
+ .error_code_valid = vcpui->exception.error_code_valid,
+ .error_code = vcpui->exception.error_code,
+ .address = vcpui->exception.address,
+ };
+
+ if (e.vector == PF_VECTOR)
+ kvm_inject_page_fault(vcpu, &e);
+ else if (e.error_code_valid)
+ kvm_queue_exception_e(vcpu, e.vector, e.error_code);
+ else
+ kvm_queue_exception(vcpu, e.vector);
+}
+
+static void kvmi_arch_save_injected_event(struct kvm_vcpu *vcpu)
+{
+ struct kvm_vcpu_introspection *vcpui = VCPUI(vcpu);
+
+ vcpui->exception.error_code = 0;
+ vcpui->exception.error_code_valid = false;
+
+ vcpui->exception.address = vcpu->arch.cr2;
+ if (vcpu->arch.exception.injected) {
+ vcpui->exception.nr = vcpu->arch.exception.nr;
+ vcpui->exception.error_code_valid =
+ x86_exception_has_error_code(vcpu->arch.exception.nr);
+ vcpui->exception.error_code = vcpu->arch.exception.error_code;
+ } else if (vcpu->arch.interrupt.injected) {
+ vcpui->exception.nr = vcpu->arch.interrupt.nr;
+ }
+}
+
+void kvmi_arch_inject_exception(struct kvm_vcpu *vcpu)
+{
+ if (!kvm_event_needs_reinjection(vcpu)) {
+ kvmi_arch_queue_exception(vcpu);
+ kvm_inject_pending_exception(vcpu);
+ }
+
+ kvmi_arch_save_injected_event(vcpu);
+}
+
+static u32 kvmi_send_trap(struct kvm_vcpu *vcpu, u8 vector,
+ u32 error_code, u64 cr2)
+{
+ struct kvmi_event_trap e;
+ int err, action;
+
+ memset(&e, 0, sizeof(e));
+ e.vector = vector;
+ e.error_code = error_code;
+ e.cr2 = cr2;
+
+ err = __kvmi_send_event(vcpu, KVMI_EVENT_TRAP, &e, sizeof(e),
+ NULL, 0, &action);
+ if (err)
+ return KVMI_EVENT_ACTION_CONTINUE;
+
+ return action;
+}
+
+void kvmi_arch_trap_event(struct kvm_vcpu *vcpu)
+{
+ struct kvm_vcpu_introspection *vcpui = VCPUI(vcpu);
+ u32 action;
+
+ action = kvmi_send_trap(vcpu, vcpui->exception.nr,
+ vcpui->exception.error_code,
+ vcpui->exception.address);
+
+ switch (action) {
+ case KVMI_EVENT_ACTION_CONTINUE:
+ break;
+ default:
+ kvmi_handle_common_event_actions(vcpu->kvm, action, "TRAP");
+ }
+}
diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index 5b88540384b4..0e3704bed6c4 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -8408,6 +8408,9 @@ static int vcpu_enter_guest(struct kvm_vcpu *vcpu)
goto cancel_injection;
}
+ if (!kvmi_enter_guest(vcpu))
+ req_immediate_exit = true;
+
if (req_immediate_exit) {
kvm_make_request(KVM_REQ_EVENT, vcpu);
kvm_x86_ops->request_immediate_exit(vcpu);
diff --git a/include/linux/kvmi_host.h b/include/linux/kvmi_host.h
index 8f28065320d8..e64f2bbd033a 100644
--- a/include/linux/kvmi_host.h
+++ b/include/linux/kvmi_host.h
@@ -41,6 +41,15 @@ struct kvm_vcpu_introspection {
struct kvm_regs delayed_regs;
bool have_delayed_regs;
+
+ struct {
+ u8 nr;
+ u32 error_code;
+ bool error_code_valid;
+ u64 address;
+ bool pending;
+ bool send_event;
+ } exception;
};
struct kvm_introspection {
@@ -77,6 +86,7 @@ int kvmi_ioctl_preunhook(struct kvm *kvm);
void kvmi_handle_requests(struct kvm_vcpu *vcpu);
bool kvmi_hypercall_event(struct kvm_vcpu *vcpu);
bool kvmi_breakpoint_event(struct kvm_vcpu *vcpu, u64 gva, u8 insn_len);
+bool kvmi_enter_guest(struct kvm_vcpu *vcpu);
#else
@@ -91,6 +101,8 @@ static inline bool kvmi_hypercall_event(struct kvm_vcpu *vcpu) { return false; }
static inline bool kvmi_breakpoint_event(struct kvm_vcpu *vcpu, u64 gva,
u8 insn_len)
{ return true; }
+static inline bool kvmi_enter_guest(struct kvm_vcpu *vcpu)
+ { return true; }
#endif /* CONFIG_KVM_INTROSPECTION */
diff --git a/include/uapi/linux/kvmi.h b/include/uapi/linux/kvmi.h
index 2826ac0f74e5..2603fa72154b 100644
--- a/include/uapi/linux/kvmi.h
+++ b/include/uapi/linux/kvmi.h
@@ -25,13 +25,14 @@ enum {
KVMI_VM_READ_PHYSICAL = 7,
KVMI_VM_WRITE_PHYSICAL = 8,
- KVMI_VCPU_GET_INFO = 9,
- KVMI_VCPU_PAUSE = 10,
- KVMI_VCPU_CONTROL_EVENTS = 11,
- KVMI_VCPU_GET_REGISTERS = 12,
- KVMI_VCPU_SET_REGISTERS = 13,
- KVMI_VCPU_GET_CPUID = 14,
- KVMI_VCPU_CONTROL_CR = 15,
+ KVMI_VCPU_GET_INFO = 9,
+ KVMI_VCPU_PAUSE = 10,
+ KVMI_VCPU_CONTROL_EVENTS = 11,
+ KVMI_VCPU_GET_REGISTERS = 12,
+ KVMI_VCPU_SET_REGISTERS = 13,
+ KVMI_VCPU_GET_CPUID = 14,
+ KVMI_VCPU_CONTROL_CR = 15,
+ KVMI_VCPU_INJECT_EXCEPTION = 16,
KVMI_NUM_MESSAGES
};
@@ -42,6 +43,7 @@ enum {
KVMI_EVENT_HYPERCALL = 2,
KVMI_EVENT_BREAKPOINT = 3,
KVMI_EVENT_CR = 4,
+ KVMI_EVENT_TRAP = 5,
KVMI_NUM_EVENTS
};
diff --git a/tools/testing/selftests/kvm/x86_64/kvmi_test.c b/tools/testing/selftests/kvm/x86_64/kvmi_test.c
index 9595e86cd79e..6a6ad736db36 100644
--- a/tools/testing/selftests/kvm/x86_64/kvmi_test.c
+++ b/tools/testing/selftests/kvm/x86_64/kvmi_test.c
@@ -45,6 +45,8 @@ struct vcpu_worker_data {
int vcpu_id;
int test_id;
bool stop;
+ bool shutdown;
+ bool restart_on_shutdown;
};
enum {
@@ -603,11 +605,19 @@ static void *vcpu_worker(void *data)
vcpu_run(ctx->vm, ctx->vcpu_id);
- TEST_ASSERT(run->exit_reason == KVM_EXIT_IO,
+ TEST_ASSERT(run->exit_reason == KVM_EXIT_IO
+ || (run->exit_reason == KVM_EXIT_SHUTDOWN
+ && ctx->shutdown),
"vcpu_run() failed, test_id %d, exit reason %u (%s)\n",
ctx->test_id, run->exit_reason,
exit_reason_str(run->exit_reason));
+ if (run->exit_reason == KVM_EXIT_SHUTDOWN) {
+ if (ctx->restart_on_shutdown)
+ continue;
+ break;
+ }
+
TEST_ASSERT(get_ucall(ctx->vm, ctx->vcpu_id, &uc),
"No guest request\n");
@@ -1126,6 +1136,102 @@ static void test_cmd_vcpu_control_cr(struct kvm_vm *vm)
sregs.cr4, ev.cr.old_value);
}
+static void __inject_exception(struct kvm_vm *vm, int vector)
+{
+ struct {
+ struct kvmi_msg_hdr hdr;
+ struct kvmi_vcpu_hdr vcpu_hdr;
+ struct kvmi_vcpu_inject_exception cmd;
+ } req = {};
+ __u16 vcpu_index = 0;
+ int r;
+
+ req.vcpu_hdr.vcpu = vcpu_index;
+ req.cmd.nr = vector;
+
+ r = do_command(KVMI_VCPU_INJECT_EXCEPTION,
+ &req.hdr, sizeof(req), NULL, 0);
+ TEST_ASSERT(r == 0,
+ "KVMI_VCPU_INJECT_EXCEPTION failed, error %d(%s)\n",
+ -r, kvm_strerror(-r));
+}
+
+static void receive_exception_event(struct kvm_vm *vm, int vector)
+{
+ struct kvmi_msg_hdr hdr;
+ struct {
+ struct kvmi_event common;
+ struct kvmi_event_trap trap;
+ } ev;
+ struct vcpu_reply rpl = {};
+
+ receive_event(&hdr, &ev.common, sizeof(ev), KVMI_EVENT_TRAP);
+
+ DEBUG("Exception event: vector %u, error_code 0x%x, cr2 0x%llx\n",
+ ev.trap.vector, ev.trap.error_code, ev.trap.cr2);
+
+ TEST_ASSERT(ev.trap.vector == vector,
+ "Injected exception %u instead of %u\n",
+ ev.trap.vector, vector);
+
+ reply_to_event(&hdr, &ev.common, KVMI_EVENT_ACTION_CONTINUE,
+ &rpl, sizeof(rpl));
+}
+
+static void test_cmd_vcpu_inject_exception(struct kvm_vm *vm)
+{
+ struct vcpu_worker_data data = {
+ .vm = vm,
+ .vcpu_id = VCPU_ID,
+ .shutdown = true,
+ .restart_on_shutdown = true,
+ };
+ struct kvmi_msg_hdr hdr;
+ struct {
+ struct kvmi_event common;
+ struct kvmi_event_breakpoint bp;
+ } ev;
+ struct vcpu_reply rpl = {};
+ pthread_t vcpu_thread;
+ __u8 ud_vector = 6;
+ __u8 bp_vector = 3;
+
+ if (!is_intel_cpu()) {
+ DEBUG("TODO: %s() - make it work with AMD\n", __func__);
+ return;
+ }
+
+ enable_vcpu_event(vm, KVMI_EVENT_BREAKPOINT);
+
+ vcpu_thread = start_vcpu_worker(&data);
+
+ __inject_exception(vm, ud_vector);
+
+ /* confirm that our exception has been injected */
+ receive_exception_event(vm, ud_vector);
+
+ WRITE_ONCE(data.test_id, GUEST_TEST_BP);
+
+ receive_event(&hdr, &ev.common, sizeof(ev), KVMI_EVENT_BREAKPOINT);
+
+ __inject_exception(vm, ud_vector);
+
+ /* skip the breakpoint instruction, next time guest_bp_test() runs */
+ ev.common.arch.regs.rip += ev.bp.insn_len;
+ __set_registers(vm, &ev.common.arch.regs);
+
+ /* reinject the #BP exception */
+ reply_to_event(&hdr, &ev.common, KVMI_EVENT_ACTION_CONTINUE,
+ &rpl, sizeof(rpl));
+
+ /* confirm that our injection didn't override the #BP exception */
+ receive_exception_event(vm, bp_vector);
+
+ stop_vcpu_worker(vcpu_thread, &data);
+
+ disable_vcpu_event(vm, KVMI_EVENT_BREAKPOINT);
+}
+
static void test_introspection(struct kvm_vm *vm)
{
srandom(time(0));
@@ -1149,6 +1255,7 @@ static void test_introspection(struct kvm_vm *vm)
test_event_hypercall(vm);
test_event_breakpoint(vm);
test_cmd_vcpu_control_cr(vm);
+ test_cmd_vcpu_inject_exception(vm);
unhook_introspection(vm);
}
diff --git a/virt/kvm/introspection/kvmi.c b/virt/kvm/introspection/kvmi.c
index 6d421cf213d7..0f2cec7e9c90 100644
--- a/virt/kvm/introspection/kvmi.c
+++ b/virt/kvm/introspection/kvmi.c
@@ -82,6 +82,7 @@ static void setup_known_events(void)
set_bit(KVMI_EVENT_CR, Kvmi_known_vcpu_events);
set_bit(KVMI_EVENT_HYPERCALL, Kvmi_known_vcpu_events);
set_bit(KVMI_EVENT_PAUSE_VCPU, Kvmi_known_vcpu_events);
+ set_bit(KVMI_EVENT_TRAP, Kvmi_known_vcpu_events);
bitmap_or(Kvmi_known_events, Kvmi_known_vm_events,
Kvmi_known_vcpu_events, KVMI_NUM_EVENTS);
@@ -803,6 +804,16 @@ static void kvmi_vcpu_pause_event(struct kvm_vcpu *vcpu)
}
}
+void kvmi_send_pending_event(struct kvm_vcpu *vcpu)
+{
+ struct kvm_vcpu_introspection *vcpui = VCPUI(vcpu);
+
+ if (vcpui->exception.send_event) {
+ kvmi_arch_trap_event(vcpu);
+ vcpui->exception.send_event = false;
+ }
+}
+
void kvmi_handle_requests(struct kvm_vcpu *vcpu)
{
struct kvm_vcpu_introspection *vcpui = VCPUI(vcpu);
@@ -812,6 +823,8 @@ void kvmi_handle_requests(struct kvm_vcpu *vcpu)
if (!kvmi)
goto out;
+ kvmi_send_pending_event(vcpu);
+
for (;;) {
kvmi_run_jobs(vcpu);
@@ -910,3 +923,36 @@ bool kvmi_breakpoint_event(struct kvm_vcpu *vcpu, u64 gva, u8 insn_len)
return ret;
}
EXPORT_SYMBOL(kvmi_breakpoint_event);
+
+static bool kvmi_inject_pending_exception(struct kvm_vcpu *vcpu)
+{
+ struct kvm_vcpu_introspection *vcpui = VCPUI(vcpu);
+
+ if (!vcpui->exception.pending)
+ return false;
+
+ kvmi_arch_inject_exception(vcpu);
+
+ vcpui->exception.send_event = true;
+ kvm_make_request(KVM_REQ_INTROSPECTION, vcpu);
+
+ vcpui->exception.pending = false;
+
+ return true;
+}
+
+bool kvmi_enter_guest(struct kvm_vcpu *vcpu)
+{
+ struct kvm_introspection *kvmi;
+ bool r = true;
+
+ kvmi = kvmi_get(vcpu->kvm);
+ if (!kvmi)
+ return true;
+
+ if (kvmi_inject_pending_exception(vcpu))
+ r = false;
+
+ kvmi_put(vcpu->kvm);
+ return r;
+}
diff --git a/virt/kvm/introspection/kvmi_int.h b/virt/kvm/introspection/kvmi_int.h
index 588a386a3f37..59a8b20af0fd 100644
--- a/virt/kvm/introspection/kvmi_int.h
+++ b/virt/kvm/introspection/kvmi_int.h
@@ -36,6 +36,9 @@ bool kvmi_msg_process(struct kvm_introspection *kvmi);
int kvmi_send_event(struct kvm_vcpu *vcpu, u32 ev_id,
void *ev, size_t ev_size,
void *rpl, size_t rpl_size, int *action);
+int __kvmi_send_event(struct kvm_vcpu *vcpu, u32 ev_id,
+ void *ev, size_t ev_size,
+ void *rpl, size_t rpl_size, int *action);
int kvmi_msg_send_unhook(struct kvm_introspection *kvmi);
u32 kvmi_msg_send_vcpu_pause(struct kvm_vcpu *vcpu);
u32 kvmi_msg_send_hypercall(struct kvm_vcpu *vcpu);
@@ -54,6 +57,7 @@ void kvmi_handle_common_event_actions(struct kvm *kvm,
u32 action, const char *str);
struct kvm_introspection * __must_check kvmi_get(struct kvm *kvm);
void kvmi_put(struct kvm *kvm);
+void kvmi_send_pending_event(struct kvm_vcpu *vcpu);
int kvmi_cmd_vm_control_events(struct kvm_introspection *kvmi,
unsigned int event_id, bool enable);
int kvmi_cmd_vcpu_control_events(struct kvm_vcpu *vcpu,
@@ -95,5 +99,9 @@ int kvmi_arch_cmd_control_intercept(struct kvm_vcpu *vcpu,
unsigned int event_id, bool enable);
int kvmi_arch_cmd_vcpu_control_cr(struct kvm_vcpu *vcpu,
const struct kvmi_vcpu_control_cr *req);
+int kvmi_arch_cmd_vcpu_inject_exception(struct kvm_vcpu *vcpu, u8 vector,
+ u32 error_code, u64 address);
+void kvmi_arch_trap_event(struct kvm_vcpu *vcpu);
+void kvmi_arch_inject_exception(struct kvm_vcpu *vcpu);
#endif
diff --git a/virt/kvm/introspection/kvmi_msg.c b/virt/kvm/introspection/kvmi_msg.c
index 789aa9f1912f..830430777556 100644
--- a/virt/kvm/introspection/kvmi_msg.c
+++ b/virt/kvm/introspection/kvmi_msg.c
@@ -20,21 +20,22 @@ struct kvmi_vcpu_cmd_job {
};
static const char *const msg_IDs[] = {
- [KVMI_EVENT] = "KVMI_EVENT",
- [KVMI_GET_VERSION] = "KVMI_GET_VERSION",
- [KVMI_VM_CHECK_COMMAND] = "KVMI_VM_CHECK_COMMAND",
- [KVMI_VM_CHECK_EVENT] = "KVMI_VM_CHECK_EVENT",
- [KVMI_VM_CONTROL_EVENTS] = "KVMI_VM_CONTROL_EVENTS",
- [KVMI_VM_GET_INFO] = "KVMI_VM_GET_INFO",
- [KVMI_VM_READ_PHYSICAL] = "KVMI_VM_READ_PHYSICAL",
- [KVMI_VM_WRITE_PHYSICAL] = "KVMI_VM_WRITE_PHYSICAL",
- [KVMI_VCPU_CONTROL_CR] = "KVMI_VCPU_CONTROL_CR",
- [KVMI_VCPU_CONTROL_EVENTS] = "KVMI_VCPU_CONTROL_EVENTS",
- [KVMI_VCPU_GET_CPUID] = "KVMI_VCPU_GET_CPUID",
- [KVMI_VCPU_GET_INFO] = "KVMI_VCPU_GET_INFO",
- [KVMI_VCPU_GET_REGISTERS] = "KVMI_VCPU_GET_REGISTERS",
- [KVMI_VCPU_PAUSE] = "KVMI_VCPU_PAUSE",
- [KVMI_VCPU_SET_REGISTERS] = "KVMI_VCPU_SET_REGISTERS",
+ [KVMI_EVENT] = "KVMI_EVENT",
+ [KVMI_GET_VERSION] = "KVMI_GET_VERSION",
+ [KVMI_VM_CHECK_COMMAND] = "KVMI_VM_CHECK_COMMAND",
+ [KVMI_VM_CHECK_EVENT] = "KVMI_VM_CHECK_EVENT",
+ [KVMI_VM_CONTROL_EVENTS] = "KVMI_VM_CONTROL_EVENTS",
+ [KVMI_VM_GET_INFO] = "KVMI_VM_GET_INFO",
+ [KVMI_VM_READ_PHYSICAL] = "KVMI_VM_READ_PHYSICAL",
+ [KVMI_VM_WRITE_PHYSICAL] = "KVMI_VM_WRITE_PHYSICAL",
+ [KVMI_VCPU_CONTROL_CR] = "KVMI_VCPU_CONTROL_CR",
+ [KVMI_VCPU_CONTROL_EVENTS] = "KVMI_VCPU_CONTROL_EVENTS",
+ [KVMI_VCPU_GET_CPUID] = "KVMI_VCPU_GET_CPUID",
+ [KVMI_VCPU_GET_INFO] = "KVMI_VCPU_GET_INFO",
+ [KVMI_VCPU_GET_REGISTERS] = "KVMI_VCPU_GET_REGISTERS",
+ [KVMI_VCPU_INJECT_EXCEPTION] = "KVMI_VCPU_INJECT_EXCEPTION",
+ [KVMI_VCPU_PAUSE] = "KVMI_VCPU_PAUSE",
+ [KVMI_VCPU_SET_REGISTERS] = "KVMI_VCPU_SET_REGISTERS",
};
static const char *id2str(u16 id)
@@ -526,6 +527,25 @@ static int handle_vcpu_control_cr(const struct kvmi_vcpu_cmd_job *job,
return kvmi_msg_vcpu_reply(job, msg, ec, NULL, 0);
}
+static int handle_vcpu_inject_exception(const struct kvmi_vcpu_cmd_job *job,
+ const struct kvmi_msg_hdr *msg,
+ const void *_req)
+{
+ const struct kvmi_vcpu_inject_exception *req = _req;
+ int ec;
+
+ if (!is_event_allowed(KVMI(job->vcpu->kvm), KVMI_EVENT_TRAP))
+ ec = -KVM_EPERM;
+ else if (req->padding1 || req->padding2)
+ ec = -KVM_EINVAL;
+ else
+ ec = kvmi_arch_cmd_vcpu_inject_exception(job->vcpu, req->nr,
+ req->error_code,
+ req->address);
+
+ return kvmi_msg_vcpu_reply(job, msg, ec, NULL, 0);
+}
+
/*
* These commands are executed from the vCPU thread. The receiving thread
* passes the messages using a newly allocated 'struct kvmi_vcpu_cmd_job'
@@ -534,13 +554,14 @@ static int handle_vcpu_control_cr(const struct kvmi_vcpu_cmd_job *job,
*/
static int(*const msg_vcpu[])(const struct kvmi_vcpu_cmd_job *,
const struct kvmi_msg_hdr *, const void *) = {
- [KVMI_EVENT] = handle_event_reply,
- [KVMI_VCPU_CONTROL_CR] = handle_vcpu_control_cr,
- [KVMI_VCPU_CONTROL_EVENTS] = handle_vcpu_control_events,
- [KVMI_VCPU_GET_CPUID] = handle_get_cpuid,
- [KVMI_VCPU_GET_INFO] = handle_get_vcpu_info,
- [KVMI_VCPU_GET_REGISTERS] = handle_get_registers,
- [KVMI_VCPU_SET_REGISTERS] = handle_set_registers,
+ [KVMI_EVENT] = handle_event_reply,
+ [KVMI_VCPU_CONTROL_CR] = handle_vcpu_control_cr,
+ [KVMI_VCPU_CONTROL_EVENTS] = handle_vcpu_control_events,
+ [KVMI_VCPU_GET_CPUID] = handle_get_cpuid,
+ [KVMI_VCPU_GET_INFO] = handle_get_vcpu_info,
+ [KVMI_VCPU_GET_REGISTERS] = handle_get_registers,
+ [KVMI_VCPU_INJECT_EXCEPTION] = handle_vcpu_inject_exception,
+ [KVMI_VCPU_SET_REGISTERS] = handle_set_registers,
};
static bool is_vcpu_command(u16 id)
@@ -797,9 +818,9 @@ static void kvmi_setup_vcpu_reply(struct kvm_vcpu_introspection *vcpui,
vcpui->waiting_for_reply = true;
}
-int kvmi_send_event(struct kvm_vcpu *vcpu, u32 ev_id,
- void *ev, size_t ev_size,
- void *rpl, size_t rpl_size, int *action)
+int __kvmi_send_event(struct kvm_vcpu *vcpu, u32 ev_id,
+ void *ev, size_t ev_size,
+ void *rpl, size_t rpl_size, int *action)
{
struct kvmi_msg_hdr hdr;
struct kvmi_event common;
@@ -839,6 +860,16 @@ int kvmi_send_event(struct kvm_vcpu *vcpu, u32 ev_id,
return err;
}
+int kvmi_send_event(struct kvm_vcpu *vcpu, u32 ev_id,
+ void *ev, size_t ev_size,
+ void *rpl, size_t rpl_size, int *action)
+{
+ kvmi_send_pending_event(vcpu);
+
+ return __kvmi_send_event(vcpu, ev_id, ev, ev_size,
+ rpl, rpl_size, action);
+}
+
u32 kvmi_msg_send_vcpu_pause(struct kvm_vcpu *vcpu)
{
int err, action;
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