test/vmapi/primary_with_secondaries/interrupts.c - hafnium - Git at Google

 /*
  * Copyright 2019 The Hafnium Authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
  * You may obtain a copy of the License at
  *
  *     https://www.apache.org/licenses/LICENSE-2.0
  *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */

 #include <stdint.h>

 #include "hf/std.h"

 #include "vmapi/hf/call.h"

 #include "hftest.h"
 #include "primary_with_secondary.h"
 #include "util.h"

 /**
  * Send a message to the interruptible VM, which will interrupt itself to send a
  * response back.
  */
 TEST(interrupts, interrupt_self)
 {
 	const char message[] = "Ping";
 	const char expected_response[] = "Got IRQ 05.";
 	struct hf_vcpu_run_return run_res;
 	struct mailbox_buffers mb = set_up_mailbox();

 	SERVICE_SELECT(SERVICE_VM0, "interruptible", mb.send);

 	run_res = hf_vcpu_run(SERVICE_VM0, 0);
 	EXPECT_EQ(run_res.code, HF_VCPU_RUN_WAIT_FOR_MESSAGE);
 	EXPECT_EQ(run_res.sleep.ns, HF_SLEEP_INDEFINITE);

 	/* Set the message, echo it and wait for a response. */
 	memcpy_s(mb.send->payload, SPCI_MSG_PAYLOAD_MAX, message,
 		 sizeof(message));
 	spci_message_init(mb.send, sizeof(message), SERVICE_VM0,
 			  HF_PRIMARY_VM_ID);
 	EXPECT_EQ(spci_msg_send(0), 0);
 	run_res = hf_vcpu_run(SERVICE_VM0, 0);
 	EXPECT_EQ(run_res.code, HF_VCPU_RUN_MESSAGE);
 	EXPECT_EQ(mb.recv->length, sizeof(expected_response));
 	EXPECT_EQ(memcmp(mb.recv->payload, expected_response,
 			 sizeof(expected_response)),
 		  0);
 	EXPECT_EQ(hf_mailbox_clear(), 0);
 }

 /**
  * Inject an interrupt to the interrupt VM, which will send a message back.
  * Repeat this twice to make sure it doesn't get into a bad state after the
  * first one.
  */
 TEST(interrupts, inject_interrupt_twice)
 {
 	const char expected_response[] = "Got IRQ 07.";
 	struct hf_vcpu_run_return run_res;
 	struct mailbox_buffers mb = set_up_mailbox();

 	SERVICE_SELECT(SERVICE_VM0, "interruptible", mb.send);

 	run_res = hf_vcpu_run(SERVICE_VM0, 0);
 	EXPECT_EQ(run_res.code, HF_VCPU_RUN_WAIT_FOR_MESSAGE);
 	EXPECT_EQ(run_res.sleep.ns, HF_SLEEP_INDEFINITE);

 	/* Inject the interrupt and wait for a message. */
 	hf_interrupt_inject(SERVICE_VM0, 0, EXTERNAL_INTERRUPT_ID_A);
 	run_res = hf_vcpu_run(SERVICE_VM0, 0);
 	EXPECT_EQ(run_res.code, HF_VCPU_RUN_MESSAGE);
 	EXPECT_EQ(mb.recv->length, sizeof(expected_response));
 	EXPECT_EQ(memcmp(mb.recv->payload, expected_response,
 			 sizeof(expected_response)),
 		  0);
 	EXPECT_EQ(hf_mailbox_clear(), 0);

 	/* Inject the interrupt again, and wait for the same message. */
 	hf_interrupt_inject(SERVICE_VM0, 0, EXTERNAL_INTERRUPT_ID_A);
 	run_res = hf_vcpu_run(SERVICE_VM0, 0);
 	EXPECT_EQ(run_res.code, HF_VCPU_RUN_MESSAGE);
 	EXPECT_EQ(mb.recv->length, sizeof(expected_response));
 	EXPECT_EQ(memcmp(mb.recv->payload, expected_response,
 			 sizeof(expected_response)),
 		  0);
 	EXPECT_EQ(hf_mailbox_clear(), 0);
 }

 /**
  * Inject two different interrupts to the interrupt VM, which will send a
  * message back each time.
  */
 TEST(interrupts, inject_two_interrupts)
 {
 	const char expected_response[] = "Got IRQ 07.";
 	const char expected_response_2[] = "Got IRQ 08.";
 	struct hf_vcpu_run_return run_res;
 	struct mailbox_buffers mb = set_up_mailbox();

 	SERVICE_SELECT(SERVICE_VM0, "interruptible", mb.send);

 	run_res = hf_vcpu_run(SERVICE_VM0, 0);
 	EXPECT_EQ(run_res.code, HF_VCPU_RUN_WAIT_FOR_MESSAGE);
 	EXPECT_EQ(run_res.sleep.ns, HF_SLEEP_INDEFINITE);

 	/* Inject the interrupt and wait for a message. */
 	hf_interrupt_inject(SERVICE_VM0, 0, EXTERNAL_INTERRUPT_ID_A);
 	run_res = hf_vcpu_run(SERVICE_VM0, 0);
 	EXPECT_EQ(run_res.code, HF_VCPU_RUN_MESSAGE);
 	EXPECT_EQ(mb.recv->length, sizeof(expected_response));
 	EXPECT_EQ(memcmp(mb.recv->payload, expected_response,
 			 sizeof(expected_response)),
 		  0);
 	EXPECT_EQ(hf_mailbox_clear(), 0);

 	/* Inject a different interrupt and wait for a different message. */
 	hf_interrupt_inject(SERVICE_VM0, 0, EXTERNAL_INTERRUPT_ID_B);
 	run_res = hf_vcpu_run(SERVICE_VM0, 0);
 	EXPECT_EQ(run_res.code, HF_VCPU_RUN_MESSAGE);
 	EXPECT_EQ(mb.recv->length, sizeof(expected_response_2));
 	EXPECT_EQ(memcmp(mb.recv->payload, expected_response_2,
 			 sizeof(expected_response_2)),
 		  0);
 	EXPECT_EQ(hf_mailbox_clear(), 0);
 }

 /**
  * Inject an interrupt then send a message to the interrupt VM, which will send
  * a message back each time. This is to test that interrupt injection doesn't
  * interfere with message reception.
  */
 TEST(interrupts, inject_interrupt_message)
 {
 	const char expected_response[] = "Got IRQ 07.";
 	const char message[] = "Ping";
 	const char expected_response_2[] = "Got IRQ 05.";
 	struct hf_vcpu_run_return run_res;
 	struct mailbox_buffers mb = set_up_mailbox();

 	SERVICE_SELECT(SERVICE_VM0, "interruptible", mb.send);

 	run_res = hf_vcpu_run(SERVICE_VM0, 0);
 	EXPECT_EQ(run_res.code, HF_VCPU_RUN_WAIT_FOR_MESSAGE);
 	EXPECT_EQ(run_res.sleep.ns, HF_SLEEP_INDEFINITE);

 	/* Inject the interrupt and wait for a message. */
 	hf_interrupt_inject(SERVICE_VM0, 0, EXTERNAL_INTERRUPT_ID_A);
 	run_res = hf_vcpu_run(SERVICE_VM0, 0);
 	EXPECT_EQ(run_res.code, HF_VCPU_RUN_MESSAGE);
 	EXPECT_EQ(mb.recv->length, sizeof(expected_response));
 	EXPECT_EQ(memcmp(mb.recv->payload, expected_response,
 			 sizeof(expected_response)),
 		  0);
 	EXPECT_EQ(hf_mailbox_clear(), 0);

 	run_res = hf_vcpu_run(SERVICE_VM0, 0);
 	EXPECT_EQ(run_res.code, HF_VCPU_RUN_WAIT_FOR_MESSAGE);
 	EXPECT_EQ(run_res.sleep.ns, HF_SLEEP_INDEFINITE);

 	/* Now send a message to the secondary. */
 	memcpy_s(mb.send->payload, SPCI_MSG_PAYLOAD_MAX, message,
 		 sizeof(message));
 	spci_message_init(mb.send, sizeof(message), SERVICE_VM0,
 			  HF_PRIMARY_VM_ID);
 	EXPECT_EQ(spci_msg_send(0), 0);
 	run_res = hf_vcpu_run(SERVICE_VM0, 0);
 	EXPECT_EQ(run_res.code, HF_VCPU_RUN_MESSAGE);
 	EXPECT_EQ(mb.recv->length, sizeof(expected_response_2));
 	EXPECT_EQ(memcmp(mb.recv->payload, expected_response_2,
 			 sizeof(expected_response_2)),
 		  0);
 	EXPECT_EQ(hf_mailbox_clear(), 0);
 }

 /**
  * Inject an interrupt which the target VM has not enabled, and then send a
  * message telling it to enable that interrupt ID. It should then (and only
  * then) send a message back.
  */
 TEST(interrupts, inject_interrupt_disabled)
 {
 	const char expected_response[] = "Got IRQ 09.";
 	const char message[] = "Enable interrupt C";
 	struct hf_vcpu_run_return run_res;
 	struct mailbox_buffers mb = set_up_mailbox();

 	SERVICE_SELECT(SERVICE_VM0, "interruptible", mb.send);

 	/* Inject the interrupt and expect not to get a message. */
 	hf_interrupt_inject(SERVICE_VM0, 0, EXTERNAL_INTERRUPT_ID_C);
 	run_res = hf_vcpu_run(SERVICE_VM0, 0);
 	EXPECT_EQ(run_res.code, HF_VCPU_RUN_WAIT_FOR_MESSAGE);
 	EXPECT_EQ(run_res.sleep.ns, HF_SLEEP_INDEFINITE);

 	/*
 	 * Now send a message to the secondary to enable the interrupt ID, and
 	 * expect the response from the interrupt we sent before.
 	 */
 	memcpy_s(mb.send->payload, SPCI_MSG_PAYLOAD_MAX, message,
 		 sizeof(message));
 	spci_message_init(mb.send, sizeof(message), SERVICE_VM0,
 			  HF_PRIMARY_VM_ID);
 	EXPECT_EQ(spci_msg_send(0), 0);
 	run_res = hf_vcpu_run(SERVICE_VM0, 0);
 	EXPECT_EQ(run_res.code, HF_VCPU_RUN_MESSAGE);
 	EXPECT_EQ(mb.recv->length, sizeof(expected_response));
 	EXPECT_EQ(memcmp(mb.recv->payload, expected_response,
 			 sizeof(expected_response)),
 		  0);
 	EXPECT_EQ(hf_mailbox_clear(), 0);
 }

 /**
  * If a secondary VM has an enabled and pending interrupt, even if interrupts
  * are disabled globally via PSTATE, then hf_mailbox_receive should not block
  * even if `block` is true.
  */
 TEST(interrupts, pending_interrupt_no_blocking_receive)
 {
 	const char expected_response[] = "Done waiting";
 	struct hf_vcpu_run_return run_res;
 	struct mailbox_buffers mb = set_up_mailbox();

 	SERVICE_SELECT(SERVICE_VM0, "receive_block", mb.send);

 	/*
 	 * Inject the interrupt and run the VM. It should disable interrupts
 	 * globally, enable the specific interrupt, and then send us a message
 	 * back after failing to receive a message a few times.
 	 */
 	hf_interrupt_inject(SERVICE_VM0, 0, EXTERNAL_INTERRUPT_ID_A);
 	run_res = hf_vcpu_run(SERVICE_VM0, 0);
 	EXPECT_EQ(run_res.code, HF_VCPU_RUN_MESSAGE);
 	EXPECT_EQ(mb.recv->length, sizeof(expected_response));
 	EXPECT_EQ(memcmp(mb.recv->payload, expected_response,
 			 sizeof(expected_response)),
 		  0);
 	EXPECT_EQ(hf_mailbox_clear(), 0);
 }

 /**
  * If a secondary VM has an enabled and pending interrupt, even if interrupts
  * are disabled globally via PSTATE, then WFI should be treated as a no-op and
  * not return to the primary.
  */
 TEST(interrupts, pending_interrupt_wfi_not_trapped)
 {
 	const char expected_response[] = "Done waiting";
 	struct hf_vcpu_run_return run_res;
 	struct mailbox_buffers mb = set_up_mailbox();

 	SERVICE_SELECT(SERVICE_VM0, "wfi", mb.send);

 	/*
 	 * Inject the interrupt and run the VM. It should disable interrupts
 	 * globally, enable the specific interrupt, and then send us a message
 	 * back after running WFI a few times.
 	 */
 	hf_interrupt_inject(SERVICE_VM0, 0, EXTERNAL_INTERRUPT_ID_A);
 	run_res = hf_vcpu_run(SERVICE_VM0, 0);
 	EXPECT_EQ(run_res.code, HF_VCPU_RUN_MESSAGE);
 	EXPECT_EQ(mb.recv->length, sizeof(expected_response));
 	EXPECT_EQ(memcmp(mb.recv->payload, expected_response,
 			 sizeof(expected_response)),
 		  0);
 	EXPECT_EQ(hf_mailbox_clear(), 0);
 }

 /*
  * Deliver an interrupt and a message to the same vCPU and check that both are
  * delivered the next time the vCPU is run.
  */
 TEST(interrupts, deliver_interrupt_and_message)
 {
 	const char message[] = "I\'ll see you again.";
 	struct hf_vcpu_run_return run_res;
 	struct mailbox_buffers mb = set_up_mailbox();

 	SERVICE_SELECT(SERVICE_VM0, "interruptible_echo", mb.send);

 	run_res = hf_vcpu_run(SERVICE_VM0, 0);
 	EXPECT_EQ(run_res.code, HF_VCPU_RUN_WAIT_FOR_MESSAGE);
 	EXPECT_EQ(run_res.sleep.ns, HF_SLEEP_INDEFINITE);

 	memcpy_s(mb.send->payload, SPCI_MSG_PAYLOAD_MAX, message,
 		 sizeof(message));
 	spci_message_init(mb.send, sizeof(message), SERVICE_VM0,
 			  HF_PRIMARY_VM_ID);
 	EXPECT_EQ(spci_msg_send(0), SPCI_SUCCESS);
 	hf_interrupt_inject(SERVICE_VM0, 0, EXTERNAL_INTERRUPT_ID_A);
 	run_res = hf_vcpu_run(SERVICE_VM0, 0);
 	EXPECT_EQ(run_res.code, HF_VCPU_RUN_MESSAGE);
 	EXPECT_EQ(mb.recv->length, sizeof(message));
 	EXPECT_EQ(memcmp(mb.recv->payload, message, sizeof(message)), 0);
 	EXPECT_EQ(hf_mailbox_clear(), 0);
 }
	/*
	* Copyright 2019 The Hafnium Authors.
	*
	* Licensed under the Apache License, Version 2.0 (the "License");
	* you may not use this file except in compliance with the License.
	* You may obtain a copy of the License at
	*
	* https://www.apache.org/licenses/LICENSE-2.0
	*
	* Unless required by applicable law or agreed to in writing, software
	* distributed under the License is distributed on an "AS IS" BASIS,
	* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
	* See the License for the specific language governing permissions and
	* limitations under the License.
	*/

	#include <stdint.h>

	#include "hf/std.h"

	#include "vmapi/hf/call.h"

	#include "hftest.h"
	#include "primary_with_secondary.h"
	#include "util.h"

	/**
	* Send a message to the interruptible VM, which will interrupt itself to send a
	* response back.
	*/
	TEST(interrupts, interrupt_self)
	{
	const char message[] = "Ping";
	const char expected_response[] = "Got IRQ 05.";
	struct hf_vcpu_run_return run_res;
	struct mailbox_buffers mb = set_up_mailbox();

	SERVICE_SELECT(SERVICE_VM0, "interruptible", mb.send);

	run_res = hf_vcpu_run(SERVICE_VM0, 0);
	EXPECT_EQ(run_res.code, HF_VCPU_RUN_WAIT_FOR_MESSAGE);
	EXPECT_EQ(run_res.sleep.ns, HF_SLEEP_INDEFINITE);

	/* Set the message, echo it and wait for a response. */
	memcpy_s(mb.send->payload, SPCI_MSG_PAYLOAD_MAX, message,
	sizeof(message));
	spci_message_init(mb.send, sizeof(message), SERVICE_VM0,
	HF_PRIMARY_VM_ID);
	EXPECT_EQ(spci_msg_send(0), 0);
	run_res = hf_vcpu_run(SERVICE_VM0, 0);
	EXPECT_EQ(run_res.code, HF_VCPU_RUN_MESSAGE);
	EXPECT_EQ(mb.recv->length, sizeof(expected_response));
	EXPECT_EQ(memcmp(mb.recv->payload, expected_response,
	sizeof(expected_response)),
	0);
	EXPECT_EQ(hf_mailbox_clear(), 0);
	}

	/**
	* Inject an interrupt to the interrupt VM, which will send a message back.
	* Repeat this twice to make sure it doesn't get into a bad state after the
	* first one.
	*/
	TEST(interrupts, inject_interrupt_twice)
	{
	const char expected_response[] = "Got IRQ 07.";
	struct hf_vcpu_run_return run_res;
	struct mailbox_buffers mb = set_up_mailbox();

	SERVICE_SELECT(SERVICE_VM0, "interruptible", mb.send);

	run_res = hf_vcpu_run(SERVICE_VM0, 0);
	EXPECT_EQ(run_res.code, HF_VCPU_RUN_WAIT_FOR_MESSAGE);
	EXPECT_EQ(run_res.sleep.ns, HF_SLEEP_INDEFINITE);

	/* Inject the interrupt and wait for a message. */
	hf_interrupt_inject(SERVICE_VM0, 0, EXTERNAL_INTERRUPT_ID_A);
	run_res = hf_vcpu_run(SERVICE_VM0, 0);
	EXPECT_EQ(run_res.code, HF_VCPU_RUN_MESSAGE);
	EXPECT_EQ(mb.recv->length, sizeof(expected_response));
	EXPECT_EQ(memcmp(mb.recv->payload, expected_response,
	sizeof(expected_response)),
	0);
	EXPECT_EQ(hf_mailbox_clear(), 0);

	/* Inject the interrupt again, and wait for the same message. */
	hf_interrupt_inject(SERVICE_VM0, 0, EXTERNAL_INTERRUPT_ID_A);
	run_res = hf_vcpu_run(SERVICE_VM0, 0);
	EXPECT_EQ(run_res.code, HF_VCPU_RUN_MESSAGE);
	EXPECT_EQ(mb.recv->length, sizeof(expected_response));
	EXPECT_EQ(memcmp(mb.recv->payload, expected_response,
	sizeof(expected_response)),
	0);
	EXPECT_EQ(hf_mailbox_clear(), 0);
	}

	/**
	* Inject two different interrupts to the interrupt VM, which will send a
	* message back each time.
	*/
	TEST(interrupts, inject_two_interrupts)
	{
	const char expected_response[] = "Got IRQ 07.";
	const char expected_response_2[] = "Got IRQ 08.";
	struct hf_vcpu_run_return run_res;
	struct mailbox_buffers mb = set_up_mailbox();

	SERVICE_SELECT(SERVICE_VM0, "interruptible", mb.send);

	run_res = hf_vcpu_run(SERVICE_VM0, 0);
	EXPECT_EQ(run_res.code, HF_VCPU_RUN_WAIT_FOR_MESSAGE);
	EXPECT_EQ(run_res.sleep.ns, HF_SLEEP_INDEFINITE);

	/* Inject the interrupt and wait for a message. */
	hf_interrupt_inject(SERVICE_VM0, 0, EXTERNAL_INTERRUPT_ID_A);
	run_res = hf_vcpu_run(SERVICE_VM0, 0);
	EXPECT_EQ(run_res.code, HF_VCPU_RUN_MESSAGE);
	EXPECT_EQ(mb.recv->length, sizeof(expected_response));
	EXPECT_EQ(memcmp(mb.recv->payload, expected_response,
	sizeof(expected_response)),
	0);
	EXPECT_EQ(hf_mailbox_clear(), 0);

	/* Inject a different interrupt and wait for a different message. */
	hf_interrupt_inject(SERVICE_VM0, 0, EXTERNAL_INTERRUPT_ID_B);
	run_res = hf_vcpu_run(SERVICE_VM0, 0);
	EXPECT_EQ(run_res.code, HF_VCPU_RUN_MESSAGE);
	EXPECT_EQ(mb.recv->length, sizeof(expected_response_2));
	EXPECT_EQ(memcmp(mb.recv->payload, expected_response_2,
	sizeof(expected_response_2)),
	0);
	EXPECT_EQ(hf_mailbox_clear(), 0);
	}

	/**
	* Inject an interrupt then send a message to the interrupt VM, which will send
	* a message back each time. This is to test that interrupt injection doesn't
	* interfere with message reception.
	*/
	TEST(interrupts, inject_interrupt_message)
	{
	const char expected_response[] = "Got IRQ 07.";
	const char message[] = "Ping";
	const char expected_response_2[] = "Got IRQ 05.";
	struct hf_vcpu_run_return run_res;
	struct mailbox_buffers mb = set_up_mailbox();

	SERVICE_SELECT(SERVICE_VM0, "interruptible", mb.send);

	run_res = hf_vcpu_run(SERVICE_VM0, 0);
	EXPECT_EQ(run_res.code, HF_VCPU_RUN_WAIT_FOR_MESSAGE);
	EXPECT_EQ(run_res.sleep.ns, HF_SLEEP_INDEFINITE);

	/* Inject the interrupt and wait for a message. */
	hf_interrupt_inject(SERVICE_VM0, 0, EXTERNAL_INTERRUPT_ID_A);
	run_res = hf_vcpu_run(SERVICE_VM0, 0);
	EXPECT_EQ(run_res.code, HF_VCPU_RUN_MESSAGE);
	EXPECT_EQ(mb.recv->length, sizeof(expected_response));
	EXPECT_EQ(memcmp(mb.recv->payload, expected_response,
	sizeof(expected_response)),
	0);
	EXPECT_EQ(hf_mailbox_clear(), 0);

	run_res = hf_vcpu_run(SERVICE_VM0, 0);
	EXPECT_EQ(run_res.code, HF_VCPU_RUN_WAIT_FOR_MESSAGE);
	EXPECT_EQ(run_res.sleep.ns, HF_SLEEP_INDEFINITE);

	/* Now send a message to the secondary. */
	memcpy_s(mb.send->payload, SPCI_MSG_PAYLOAD_MAX, message,
	sizeof(message));
	spci_message_init(mb.send, sizeof(message), SERVICE_VM0,
	HF_PRIMARY_VM_ID);
	EXPECT_EQ(spci_msg_send(0), 0);
	run_res = hf_vcpu_run(SERVICE_VM0, 0);
	EXPECT_EQ(run_res.code, HF_VCPU_RUN_MESSAGE);
	EXPECT_EQ(mb.recv->length, sizeof(expected_response_2));
	EXPECT_EQ(memcmp(mb.recv->payload, expected_response_2,
	sizeof(expected_response_2)),
	0);
	EXPECT_EQ(hf_mailbox_clear(), 0);
	}

	/**
	* Inject an interrupt which the target VM has not enabled, and then send a
	* message telling it to enable that interrupt ID. It should then (and only
	* then) send a message back.
	*/
	TEST(interrupts, inject_interrupt_disabled)
	{
	const char expected_response[] = "Got IRQ 09.";
	const char message[] = "Enable interrupt C";
	struct hf_vcpu_run_return run_res;
	struct mailbox_buffers mb = set_up_mailbox();

	SERVICE_SELECT(SERVICE_VM0, "interruptible", mb.send);

	/* Inject the interrupt and expect not to get a message. */
	hf_interrupt_inject(SERVICE_VM0, 0, EXTERNAL_INTERRUPT_ID_C);
	run_res = hf_vcpu_run(SERVICE_VM0, 0);
	EXPECT_EQ(run_res.code, HF_VCPU_RUN_WAIT_FOR_MESSAGE);
	EXPECT_EQ(run_res.sleep.ns, HF_SLEEP_INDEFINITE);

	/*
	* Now send a message to the secondary to enable the interrupt ID, and
	* expect the response from the interrupt we sent before.
	*/
	memcpy_s(mb.send->payload, SPCI_MSG_PAYLOAD_MAX, message,
	sizeof(message));
	spci_message_init(mb.send, sizeof(message), SERVICE_VM0,
	HF_PRIMARY_VM_ID);
	EXPECT_EQ(spci_msg_send(0), 0);
	run_res = hf_vcpu_run(SERVICE_VM0, 0);
	EXPECT_EQ(run_res.code, HF_VCPU_RUN_MESSAGE);
	EXPECT_EQ(mb.recv->length, sizeof(expected_response));
	EXPECT_EQ(memcmp(mb.recv->payload, expected_response,
	sizeof(expected_response)),
	0);
	EXPECT_EQ(hf_mailbox_clear(), 0);
	}

	/**
	* If a secondary VM has an enabled and pending interrupt, even if interrupts
	* are disabled globally via PSTATE, then hf_mailbox_receive should not block
	* even if `block` is true.
	*/
	TEST(interrupts, pending_interrupt_no_blocking_receive)
	{
	const char expected_response[] = "Done waiting";
	struct hf_vcpu_run_return run_res;
	struct mailbox_buffers mb = set_up_mailbox();

	SERVICE_SELECT(SERVICE_VM0, "receive_block", mb.send);

	/*
	* Inject the interrupt and run the VM. It should disable interrupts
	* globally, enable the specific interrupt, and then send us a message
	* back after failing to receive a message a few times.
	*/
	hf_interrupt_inject(SERVICE_VM0, 0, EXTERNAL_INTERRUPT_ID_A);
	run_res = hf_vcpu_run(SERVICE_VM0, 0);
	EXPECT_EQ(run_res.code, HF_VCPU_RUN_MESSAGE);
	EXPECT_EQ(mb.recv->length, sizeof(expected_response));
	EXPECT_EQ(memcmp(mb.recv->payload, expected_response,
	sizeof(expected_response)),
	0);
	EXPECT_EQ(hf_mailbox_clear(), 0);
	}

	/**
	* If a secondary VM has an enabled and pending interrupt, even if interrupts
	* are disabled globally via PSTATE, then WFI should be treated as a no-op and
	* not return to the primary.
	*/
	TEST(interrupts, pending_interrupt_wfi_not_trapped)
	{
	const char expected_response[] = "Done waiting";
	struct hf_vcpu_run_return run_res;
	struct mailbox_buffers mb = set_up_mailbox();

	SERVICE_SELECT(SERVICE_VM0, "wfi", mb.send);

	/*
	* Inject the interrupt and run the VM. It should disable interrupts
	* globally, enable the specific interrupt, and then send us a message
	* back after running WFI a few times.
	*/
	hf_interrupt_inject(SERVICE_VM0, 0, EXTERNAL_INTERRUPT_ID_A);
	run_res = hf_vcpu_run(SERVICE_VM0, 0);
	EXPECT_EQ(run_res.code, HF_VCPU_RUN_MESSAGE);
	EXPECT_EQ(mb.recv->length, sizeof(expected_response));
	EXPECT_EQ(memcmp(mb.recv->payload, expected_response,
	sizeof(expected_response)),
	0);
	EXPECT_EQ(hf_mailbox_clear(), 0);
	}

	/*
	* Deliver an interrupt and a message to the same vCPU and check that both are
	* delivered the next time the vCPU is run.
	*/
	TEST(interrupts, deliver_interrupt_and_message)
	{
	const char message[] = "I\'ll see you again.";
	struct hf_vcpu_run_return run_res;
	struct mailbox_buffers mb = set_up_mailbox();

	SERVICE_SELECT(SERVICE_VM0, "interruptible_echo", mb.send);

	run_res = hf_vcpu_run(SERVICE_VM0, 0);
	EXPECT_EQ(run_res.code, HF_VCPU_RUN_WAIT_FOR_MESSAGE);
	EXPECT_EQ(run_res.sleep.ns, HF_SLEEP_INDEFINITE);

	memcpy_s(mb.send->payload, SPCI_MSG_PAYLOAD_MAX, message,
	sizeof(message));
	spci_message_init(mb.send, sizeof(message), SERVICE_VM0,
	HF_PRIMARY_VM_ID);
	EXPECT_EQ(spci_msg_send(0), SPCI_SUCCESS);
	hf_interrupt_inject(SERVICE_VM0, 0, EXTERNAL_INTERRUPT_ID_A);
	run_res = hf_vcpu_run(SERVICE_VM0, 0);
	EXPECT_EQ(run_res.code, HF_VCPU_RUN_MESSAGE);
	EXPECT_EQ(mb.recv->length, sizeof(message));
	EXPECT_EQ(memcmp(mb.recv->payload, message, sizeof(message)), 0);
	EXPECT_EQ(hf_mailbox_clear(), 0);
	}