test/vmapi/primary_with_secondaries/interrupts.c - hafnium/hafnium.git - TrustedFirmware Git Browser

 /*
  * Copyright 2019 The Hafnium Authors.
  *
  * Use of this source code is governed by a BSD-style
  * license that can be found in the LICENSE file or at
  * https://opensource.org/licenses/BSD-3-Clause.
  */

 #include <stdint.h>

 #include "hf/std.h"

 #include "vmapi/hf/call.h"

 #include "primary_with_secondary.h"
 #include "test/hftest.h"
 #include "test/vmapi/ffa.h"

 TEAR_DOWN(interrupts)
 {
 	EXPECT_FFA_ERROR(ffa_rx_release(), FFA_DENIED);
 }

 /**
  * 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 ffa_value run_res;
 	struct mailbox_buffers mb = set_up_mailbox();

 	SERVICE_SELECT(SERVICE_VM1, "interruptible", mb.send);

 	run_res = ffa_run(SERVICE_VM1, 0);
 	EXPECT_EQ(run_res.func, FFA_MSG_WAIT_32);
 	EXPECT_EQ(run_res.arg2, FFA_SLEEP_INDEFINITE);

 	/* Set the message, echo it and wait for a response. */
 	memcpy_s(mb.send, FFA_MSG_PAYLOAD_MAX, message, sizeof(message));
 	EXPECT_EQ(
 		ffa_msg_send(HF_PRIMARY_VM_ID, SERVICE_VM1, sizeof(message), 0)
 			.func,
 		FFA_SUCCESS_32);
 	run_res = ffa_run(SERVICE_VM1, 0);
 	EXPECT_EQ(run_res.func, FFA_MSG_SEND_32);
 	EXPECT_EQ(ffa_msg_send_size(run_res), sizeof(expected_response));
 	EXPECT_EQ(memcmp(mb.recv, expected_response, sizeof(expected_response)),
 		  0);
 	EXPECT_EQ(ffa_rx_release().func, FFA_SUCCESS_32);
 }

 /**
  * 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 ffa_value run_res;
 	struct mailbox_buffers mb = set_up_mailbox();

 	SERVICE_SELECT(SERVICE_VM1, "interruptible", mb.send);

 	run_res = ffa_run(SERVICE_VM1, 0);
 	EXPECT_EQ(run_res.func, FFA_MSG_WAIT_32);
 	EXPECT_EQ(run_res.arg2, FFA_SLEEP_INDEFINITE);

 	/* Inject the interrupt and wait for a message. */
 	hf_interrupt_inject(SERVICE_VM1, 0, EXTERNAL_INTERRUPT_ID_A);
 	run_res = ffa_run(SERVICE_VM1, 0);
 	EXPECT_EQ(run_res.func, FFA_MSG_SEND_32);
 	EXPECT_EQ(ffa_msg_send_size(run_res), sizeof(expected_response));
 	EXPECT_EQ(memcmp(mb.recv, expected_response, sizeof(expected_response)),
 		  0);
 	EXPECT_EQ(ffa_rx_release().func, FFA_SUCCESS_32);

 	/* Inject the interrupt again, and wait for the same message. */
 	hf_interrupt_inject(SERVICE_VM1, 0, EXTERNAL_INTERRUPT_ID_A);
 	run_res = ffa_run(SERVICE_VM1, 0);
 	EXPECT_EQ(run_res.func, FFA_MSG_SEND_32);
 	EXPECT_EQ(ffa_msg_send_size(run_res), sizeof(expected_response));
 	EXPECT_EQ(memcmp(mb.recv, expected_response, sizeof(expected_response)),
 		  0);
 	EXPECT_EQ(ffa_rx_release().func, FFA_SUCCESS_32);
 }

 /**
  * 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 ffa_value run_res;
 	struct mailbox_buffers mb = set_up_mailbox();

 	SERVICE_SELECT(SERVICE_VM1, "interruptible", mb.send);

 	run_res = ffa_run(SERVICE_VM1, 0);
 	EXPECT_EQ(run_res.func, FFA_MSG_WAIT_32);
 	EXPECT_EQ(run_res.arg2, FFA_SLEEP_INDEFINITE);

 	/* Inject the interrupt and wait for a message. */
 	hf_interrupt_inject(SERVICE_VM1, 0, EXTERNAL_INTERRUPT_ID_A);
 	run_res = ffa_run(SERVICE_VM1, 0);
 	EXPECT_EQ(run_res.func, FFA_MSG_SEND_32);
 	EXPECT_EQ(ffa_msg_send_size(run_res), sizeof(expected_response));
 	EXPECT_EQ(memcmp(mb.recv, expected_response, sizeof(expected_response)),
 		  0);
 	EXPECT_EQ(ffa_rx_release().func, FFA_SUCCESS_32);

 	/* Inject a different interrupt and wait for a different message. */
 	hf_interrupt_inject(SERVICE_VM1, 0, EXTERNAL_INTERRUPT_ID_B);
 	run_res = ffa_run(SERVICE_VM1, 0);
 	EXPECT_EQ(run_res.func, FFA_MSG_SEND_32);
 	EXPECT_EQ(ffa_msg_send_size(run_res), sizeof(expected_response_2));
 	EXPECT_EQ(memcmp(mb.recv, expected_response_2,
 			 sizeof(expected_response_2)),
 		  0);
 	EXPECT_EQ(ffa_rx_release().func, FFA_SUCCESS_32);
 }

 /**
  * 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 ffa_value run_res;
 	struct mailbox_buffers mb = set_up_mailbox();

 	SERVICE_SELECT(SERVICE_VM1, "interruptible", mb.send);

 	run_res = ffa_run(SERVICE_VM1, 0);
 	EXPECT_EQ(run_res.func, FFA_MSG_WAIT_32);
 	EXPECT_EQ(run_res.arg2, FFA_SLEEP_INDEFINITE);

 	/* Inject the interrupt and wait for a message. */
 	hf_interrupt_inject(SERVICE_VM1, 0, EXTERNAL_INTERRUPT_ID_A);
 	run_res = ffa_run(SERVICE_VM1, 0);
 	EXPECT_EQ(run_res.func, FFA_MSG_SEND_32);
 	EXPECT_EQ(ffa_msg_send_size(run_res), sizeof(expected_response));
 	EXPECT_EQ(memcmp(mb.recv, expected_response, sizeof(expected_response)),
 		  0);
 	EXPECT_EQ(ffa_rx_release().func, FFA_SUCCESS_32);

 	run_res = ffa_run(SERVICE_VM1, 0);
 	EXPECT_EQ(run_res.func, FFA_MSG_WAIT_32);
 	EXPECT_EQ(run_res.arg2, FFA_SLEEP_INDEFINITE);

 	/* Now send a message to the secondary. */
 	memcpy_s(mb.send, FFA_MSG_PAYLOAD_MAX, message, sizeof(message));
 	EXPECT_EQ(
 		ffa_msg_send(HF_PRIMARY_VM_ID, SERVICE_VM1, sizeof(message), 0)
 			.func,
 		FFA_SUCCESS_32);
 	run_res = ffa_run(SERVICE_VM1, 0);
 	EXPECT_EQ(run_res.func, FFA_MSG_SEND_32);
 	EXPECT_EQ(ffa_msg_send_size(run_res), sizeof(expected_response_2));
 	EXPECT_EQ(memcmp(mb.recv, expected_response_2,
 			 sizeof(expected_response_2)),
 		  0);
 	EXPECT_EQ(ffa_rx_release().func, FFA_SUCCESS_32);
 }

 /**
  * 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 ffa_value run_res;
 	struct mailbox_buffers mb = set_up_mailbox();

 	SERVICE_SELECT(SERVICE_VM1, "interruptible", mb.send);

 	/* Inject the interrupt and expect not to get a message. */
 	hf_interrupt_inject(SERVICE_VM1, 0, EXTERNAL_INTERRUPT_ID_C);
 	run_res = ffa_run(SERVICE_VM1, 0);
 	EXPECT_EQ(run_res.func, FFA_MSG_WAIT_32);
 	EXPECT_EQ(run_res.arg2, FFA_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, FFA_MSG_PAYLOAD_MAX, message, sizeof(message));
 	EXPECT_EQ(
 		ffa_msg_send(HF_PRIMARY_VM_ID, SERVICE_VM1, sizeof(message), 0)
 			.func,
 		FFA_SUCCESS_32);
 	run_res = ffa_run(SERVICE_VM1, 0);
 	EXPECT_EQ(run_res.func, FFA_MSG_SEND_32);
 	EXPECT_EQ(ffa_msg_send_size(run_res), sizeof(expected_response));
 	EXPECT_EQ(memcmp(mb.recv, expected_response, sizeof(expected_response)),
 		  0);
 	EXPECT_EQ(ffa_rx_release().func, FFA_SUCCESS_32);
 }

 /**
  * 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 ffa_value run_res;
 	struct mailbox_buffers mb = set_up_mailbox();

 	SERVICE_SELECT(SERVICE_VM1, "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_VM1, 0, EXTERNAL_INTERRUPT_ID_A);
 	run_res = ffa_run(SERVICE_VM1, 0);
 	EXPECT_EQ(run_res.func, FFA_MSG_SEND_32);
 	EXPECT_EQ(ffa_msg_send_size(run_res), sizeof(expected_response));
 	EXPECT_EQ(memcmp(mb.recv, expected_response, sizeof(expected_response)),
 		  0);
 	EXPECT_EQ(ffa_rx_release().func, FFA_SUCCESS_32);
 }

 /**
  * 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 ffa_value run_res;
 	struct mailbox_buffers mb = set_up_mailbox();

 	SERVICE_SELECT(SERVICE_VM1, "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_VM1, 0, EXTERNAL_INTERRUPT_ID_A);
 	run_res = ffa_run(SERVICE_VM1, 0);
 	EXPECT_EQ(run_res.func, FFA_MSG_SEND_32);
 	EXPECT_EQ(ffa_msg_send_size(run_res), sizeof(expected_response));
 	EXPECT_EQ(memcmp(mb.recv, expected_response, sizeof(expected_response)),
 		  0);
 	EXPECT_EQ(ffa_rx_release().func, FFA_SUCCESS_32);
 }

 /*
  * 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 ffa_value run_res;
 	struct mailbox_buffers mb = set_up_mailbox();

 	SERVICE_SELECT(SERVICE_VM1, "interruptible_echo", mb.send);

 	run_res = ffa_run(SERVICE_VM1, 0);
 	EXPECT_EQ(run_res.func, FFA_MSG_WAIT_32);
 	EXPECT_EQ(run_res.arg2, FFA_SLEEP_INDEFINITE);

 	memcpy_s(mb.send, FFA_MSG_PAYLOAD_MAX, message, sizeof(message));
 	EXPECT_EQ(
 		ffa_msg_send(HF_PRIMARY_VM_ID, SERVICE_VM1, sizeof(message), 0)
 			.func,
 		FFA_SUCCESS_32);
 	hf_interrupt_inject(SERVICE_VM1, 0, EXTERNAL_INTERRUPT_ID_A);
 	run_res = ffa_run(SERVICE_VM1, 0);
 	EXPECT_EQ(run_res.func, FFA_MSG_SEND_32);
 	EXPECT_EQ(ffa_msg_send_size(run_res), sizeof(message));
 	EXPECT_EQ(memcmp(mb.recv, message, sizeof(message)), 0);
 	EXPECT_EQ(ffa_rx_release().func, FFA_SUCCESS_32);
 }

 /**
  * The secondary vCPU is waiting for a direct msg request, but the primary
  * instead injects an interrupt into it and calls FFA_RUN. The secondary
  * should get FFA_INTERRUPT_32 returned, as well as the interrupt itself.
  */
 TEST(interrupts_direct_msg, direct_msg_request_interrupted)
 {
 	struct mailbox_buffers mb = set_up_mailbox();
 	struct ffa_value res;

 	SERVICE_SELECT(SERVICE_VM1, "interruptible_echo_direct_msg", mb.send);

 	/* Let the secondary get started and wait for a message. */
 	res = ffa_run(SERVICE_VM1, 0);
 	EXPECT_EQ(res.func, FFA_MSG_WAIT_32);
 	EXPECT_EQ(res.arg2, FFA_SLEEP_INDEFINITE);

 	/* Send an initial direct message request */
 	res = ffa_msg_send_direct_req(HF_PRIMARY_VM_ID, SERVICE_VM1, 1, 0, 0, 0,
 				      0);
 	EXPECT_EQ(res.func, FFA_MSG_SEND_DIRECT_RESP_32);
 	EXPECT_EQ(res.arg3, 2);

 	/* Inject an interrupt to the secondary VM */
 	hf_interrupt_inject(SERVICE_VM1, 0, EXTERNAL_INTERRUPT_ID_A);

 	/* Let the secondary VM run */
 	res = ffa_run(SERVICE_VM1, 0);
 	EXPECT_EQ(res.func, FFA_MSG_WAIT_32);

 	res = ffa_msg_send_direct_req(HF_PRIMARY_VM_ID, SERVICE_VM1, 3, 0, 0, 0,
 				      0);
 	EXPECT_EQ(res.func, FFA_MSG_SEND_DIRECT_RESP_32);
 	EXPECT_EQ(res.arg3, 4);
 }

 /**
  * The secondary vCPU is waiting for a direct request. The primary injects
  * an interrupt into it and then calls FFA_MSG_SEND_DIRECT_REQ. The secondary
  * shall get both the direct request and the interrupt.
  */
 TEST(interrupts_direct_msg, direct_msg_request_with_interrupt)
 {
 	struct mailbox_buffers mb = set_up_mailbox();
 	struct ffa_value res;

 	SERVICE_SELECT(SERVICE_VM1,
 		       "interruptible_echo_direct_msg_with_interrupt", mb.send);

 	/* Let the secondary get started and wait for a message. */
 	res = ffa_run(SERVICE_VM1, 0);
 	EXPECT_EQ(res.func, FFA_MSG_WAIT_32);
 	EXPECT_EQ(res.arg2, FFA_SLEEP_INDEFINITE);

 	/* Inject an interrupt to the secondary VM */
 	hf_interrupt_inject(SERVICE_VM1, 0, EXTERNAL_INTERRUPT_ID_A);

 	/*
 	 * Send a direct message request. Expect the secondary VM to receive
 	 * the message and the interrupt together. The secondary VM then
 	 * replies with a direct message response.
 	 */
 	res = ffa_msg_send_direct_req(HF_PRIMARY_VM_ID, SERVICE_VM1, 1, 0, 0, 0,
 				      0);
 	EXPECT_EQ(res.func, FFA_MSG_SEND_DIRECT_RESP_32);
 	EXPECT_EQ(res.arg3, 2);
 }
	/*
	* Copyright 2019 The Hafnium Authors.
	*
	* Use of this source code is governed by a BSD-style
	* license that can be found in the LICENSE file or at
	* https://opensource.org/licenses/BSD-3-Clause.
	*/

	#include <stdint.h>

	#include "hf/std.h"

	#include "vmapi/hf/call.h"

	#include "primary_with_secondary.h"
	#include "test/hftest.h"
	#include "test/vmapi/ffa.h"

	TEAR_DOWN(interrupts)
	{
	EXPECT_FFA_ERROR(ffa_rx_release(), FFA_DENIED);
	}

	/**
	* 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 ffa_value run_res;
	struct mailbox_buffers mb = set_up_mailbox();

	SERVICE_SELECT(SERVICE_VM1, "interruptible", mb.send);

	run_res = ffa_run(SERVICE_VM1, 0);
	EXPECT_EQ(run_res.func, FFA_MSG_WAIT_32);
	EXPECT_EQ(run_res.arg2, FFA_SLEEP_INDEFINITE);

	/* Set the message, echo it and wait for a response. */
	memcpy_s(mb.send, FFA_MSG_PAYLOAD_MAX, message, sizeof(message));
	EXPECT_EQ(
	ffa_msg_send(HF_PRIMARY_VM_ID, SERVICE_VM1, sizeof(message), 0)
	.func,
	FFA_SUCCESS_32);
	run_res = ffa_run(SERVICE_VM1, 0);
	EXPECT_EQ(run_res.func, FFA_MSG_SEND_32);
	EXPECT_EQ(ffa_msg_send_size(run_res), sizeof(expected_response));
	EXPECT_EQ(memcmp(mb.recv, expected_response, sizeof(expected_response)),
	0);
	EXPECT_EQ(ffa_rx_release().func, FFA_SUCCESS_32);
	}

	/**
	* 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 ffa_value run_res;
	struct mailbox_buffers mb = set_up_mailbox();

	SERVICE_SELECT(SERVICE_VM1, "interruptible", mb.send);

	run_res = ffa_run(SERVICE_VM1, 0);
	EXPECT_EQ(run_res.func, FFA_MSG_WAIT_32);
	EXPECT_EQ(run_res.arg2, FFA_SLEEP_INDEFINITE);

	/* Inject the interrupt and wait for a message. */
	hf_interrupt_inject(SERVICE_VM1, 0, EXTERNAL_INTERRUPT_ID_A);
	run_res = ffa_run(SERVICE_VM1, 0);
	EXPECT_EQ(run_res.func, FFA_MSG_SEND_32);
	EXPECT_EQ(ffa_msg_send_size(run_res), sizeof(expected_response));
	EXPECT_EQ(memcmp(mb.recv, expected_response, sizeof(expected_response)),
	0);
	EXPECT_EQ(ffa_rx_release().func, FFA_SUCCESS_32);

	/* Inject the interrupt again, and wait for the same message. */
	hf_interrupt_inject(SERVICE_VM1, 0, EXTERNAL_INTERRUPT_ID_A);
	run_res = ffa_run(SERVICE_VM1, 0);
	EXPECT_EQ(run_res.func, FFA_MSG_SEND_32);
	EXPECT_EQ(ffa_msg_send_size(run_res), sizeof(expected_response));
	EXPECT_EQ(memcmp(mb.recv, expected_response, sizeof(expected_response)),
	0);
	EXPECT_EQ(ffa_rx_release().func, FFA_SUCCESS_32);
	}

	/**
	* 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 ffa_value run_res;
	struct mailbox_buffers mb = set_up_mailbox();

	SERVICE_SELECT(SERVICE_VM1, "interruptible", mb.send);

	run_res = ffa_run(SERVICE_VM1, 0);
	EXPECT_EQ(run_res.func, FFA_MSG_WAIT_32);
	EXPECT_EQ(run_res.arg2, FFA_SLEEP_INDEFINITE);

	/* Inject the interrupt and wait for a message. */
	hf_interrupt_inject(SERVICE_VM1, 0, EXTERNAL_INTERRUPT_ID_A);
	run_res = ffa_run(SERVICE_VM1, 0);
	EXPECT_EQ(run_res.func, FFA_MSG_SEND_32);
	EXPECT_EQ(ffa_msg_send_size(run_res), sizeof(expected_response));
	EXPECT_EQ(memcmp(mb.recv, expected_response, sizeof(expected_response)),
	0);
	EXPECT_EQ(ffa_rx_release().func, FFA_SUCCESS_32);

	/* Inject a different interrupt and wait for a different message. */
	hf_interrupt_inject(SERVICE_VM1, 0, EXTERNAL_INTERRUPT_ID_B);
	run_res = ffa_run(SERVICE_VM1, 0);
	EXPECT_EQ(run_res.func, FFA_MSG_SEND_32);
	EXPECT_EQ(ffa_msg_send_size(run_res), sizeof(expected_response_2));
	EXPECT_EQ(memcmp(mb.recv, expected_response_2,
	sizeof(expected_response_2)),
	0);
	EXPECT_EQ(ffa_rx_release().func, FFA_SUCCESS_32);
	}

	/**
	* 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 ffa_value run_res;
	struct mailbox_buffers mb = set_up_mailbox();

	SERVICE_SELECT(SERVICE_VM1, "interruptible", mb.send);

	run_res = ffa_run(SERVICE_VM1, 0);
	EXPECT_EQ(run_res.func, FFA_MSG_WAIT_32);
	EXPECT_EQ(run_res.arg2, FFA_SLEEP_INDEFINITE);

	/* Inject the interrupt and wait for a message. */
	hf_interrupt_inject(SERVICE_VM1, 0, EXTERNAL_INTERRUPT_ID_A);
	run_res = ffa_run(SERVICE_VM1, 0);
	EXPECT_EQ(run_res.func, FFA_MSG_SEND_32);
	EXPECT_EQ(ffa_msg_send_size(run_res), sizeof(expected_response));
	EXPECT_EQ(memcmp(mb.recv, expected_response, sizeof(expected_response)),
	0);
	EXPECT_EQ(ffa_rx_release().func, FFA_SUCCESS_32);

	run_res = ffa_run(SERVICE_VM1, 0);
	EXPECT_EQ(run_res.func, FFA_MSG_WAIT_32);
	EXPECT_EQ(run_res.arg2, FFA_SLEEP_INDEFINITE);

	/* Now send a message to the secondary. */
	memcpy_s(mb.send, FFA_MSG_PAYLOAD_MAX, message, sizeof(message));
	EXPECT_EQ(
	ffa_msg_send(HF_PRIMARY_VM_ID, SERVICE_VM1, sizeof(message), 0)
	.func,
	FFA_SUCCESS_32);
	run_res = ffa_run(SERVICE_VM1, 0);
	EXPECT_EQ(run_res.func, FFA_MSG_SEND_32);
	EXPECT_EQ(ffa_msg_send_size(run_res), sizeof(expected_response_2));
	EXPECT_EQ(memcmp(mb.recv, expected_response_2,
	sizeof(expected_response_2)),
	0);
	EXPECT_EQ(ffa_rx_release().func, FFA_SUCCESS_32);
	}

	/**
	* 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 ffa_value run_res;
	struct mailbox_buffers mb = set_up_mailbox();

	SERVICE_SELECT(SERVICE_VM1, "interruptible", mb.send);

	/* Inject the interrupt and expect not to get a message. */
	hf_interrupt_inject(SERVICE_VM1, 0, EXTERNAL_INTERRUPT_ID_C);
	run_res = ffa_run(SERVICE_VM1, 0);
	EXPECT_EQ(run_res.func, FFA_MSG_WAIT_32);
	EXPECT_EQ(run_res.arg2, FFA_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, FFA_MSG_PAYLOAD_MAX, message, sizeof(message));
	EXPECT_EQ(
	ffa_msg_send(HF_PRIMARY_VM_ID, SERVICE_VM1, sizeof(message), 0)
	.func,
	FFA_SUCCESS_32);
	run_res = ffa_run(SERVICE_VM1, 0);
	EXPECT_EQ(run_res.func, FFA_MSG_SEND_32);
	EXPECT_EQ(ffa_msg_send_size(run_res), sizeof(expected_response));
	EXPECT_EQ(memcmp(mb.recv, expected_response, sizeof(expected_response)),
	0);
	EXPECT_EQ(ffa_rx_release().func, FFA_SUCCESS_32);
	}

	/**
	* 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 ffa_value run_res;
	struct mailbox_buffers mb = set_up_mailbox();

	SERVICE_SELECT(SERVICE_VM1, "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_VM1, 0, EXTERNAL_INTERRUPT_ID_A);
	run_res = ffa_run(SERVICE_VM1, 0);
	EXPECT_EQ(run_res.func, FFA_MSG_SEND_32);
	EXPECT_EQ(ffa_msg_send_size(run_res), sizeof(expected_response));
	EXPECT_EQ(memcmp(mb.recv, expected_response, sizeof(expected_response)),
	0);
	EXPECT_EQ(ffa_rx_release().func, FFA_SUCCESS_32);
	}

	/**
	* 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 ffa_value run_res;
	struct mailbox_buffers mb = set_up_mailbox();

	SERVICE_SELECT(SERVICE_VM1, "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_VM1, 0, EXTERNAL_INTERRUPT_ID_A);
	run_res = ffa_run(SERVICE_VM1, 0);
	EXPECT_EQ(run_res.func, FFA_MSG_SEND_32);
	EXPECT_EQ(ffa_msg_send_size(run_res), sizeof(expected_response));
	EXPECT_EQ(memcmp(mb.recv, expected_response, sizeof(expected_response)),
	0);
	EXPECT_EQ(ffa_rx_release().func, FFA_SUCCESS_32);
	}

	/*
	* 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 ffa_value run_res;
	struct mailbox_buffers mb = set_up_mailbox();

	SERVICE_SELECT(SERVICE_VM1, "interruptible_echo", mb.send);

	run_res = ffa_run(SERVICE_VM1, 0);
	EXPECT_EQ(run_res.func, FFA_MSG_WAIT_32);
	EXPECT_EQ(run_res.arg2, FFA_SLEEP_INDEFINITE);

	memcpy_s(mb.send, FFA_MSG_PAYLOAD_MAX, message, sizeof(message));
	EXPECT_EQ(
	ffa_msg_send(HF_PRIMARY_VM_ID, SERVICE_VM1, sizeof(message), 0)
	.func,
	FFA_SUCCESS_32);
	hf_interrupt_inject(SERVICE_VM1, 0, EXTERNAL_INTERRUPT_ID_A);
	run_res = ffa_run(SERVICE_VM1, 0);
	EXPECT_EQ(run_res.func, FFA_MSG_SEND_32);
	EXPECT_EQ(ffa_msg_send_size(run_res), sizeof(message));
	EXPECT_EQ(memcmp(mb.recv, message, sizeof(message)), 0);
	EXPECT_EQ(ffa_rx_release().func, FFA_SUCCESS_32);
	}

	/**
	* The secondary vCPU is waiting for a direct msg request, but the primary
	* instead injects an interrupt into it and calls FFA_RUN. The secondary
	* should get FFA_INTERRUPT_32 returned, as well as the interrupt itself.
	*/
	TEST(interrupts_direct_msg, direct_msg_request_interrupted)
	{
	struct mailbox_buffers mb = set_up_mailbox();
	struct ffa_value res;

	SERVICE_SELECT(SERVICE_VM1, "interruptible_echo_direct_msg", mb.send);

	/* Let the secondary get started and wait for a message. */
	res = ffa_run(SERVICE_VM1, 0);
	EXPECT_EQ(res.func, FFA_MSG_WAIT_32);
	EXPECT_EQ(res.arg2, FFA_SLEEP_INDEFINITE);

	/* Send an initial direct message request */
	res = ffa_msg_send_direct_req(HF_PRIMARY_VM_ID, SERVICE_VM1, 1, 0, 0, 0,
	0);
	EXPECT_EQ(res.func, FFA_MSG_SEND_DIRECT_RESP_32);
	EXPECT_EQ(res.arg3, 2);

	/* Inject an interrupt to the secondary VM */
	hf_interrupt_inject(SERVICE_VM1, 0, EXTERNAL_INTERRUPT_ID_A);

	/* Let the secondary VM run */
	res = ffa_run(SERVICE_VM1, 0);
	EXPECT_EQ(res.func, FFA_MSG_WAIT_32);

	res = ffa_msg_send_direct_req(HF_PRIMARY_VM_ID, SERVICE_VM1, 3, 0, 0, 0,
	0);
	EXPECT_EQ(res.func, FFA_MSG_SEND_DIRECT_RESP_32);
	EXPECT_EQ(res.arg3, 4);
	}

	/**
	* The secondary vCPU is waiting for a direct request. The primary injects
	* an interrupt into it and then calls FFA_MSG_SEND_DIRECT_REQ. The secondary
	* shall get both the direct request and the interrupt.
	*/
	TEST(interrupts_direct_msg, direct_msg_request_with_interrupt)
	{
	struct mailbox_buffers mb = set_up_mailbox();
	struct ffa_value res;

	SERVICE_SELECT(SERVICE_VM1,
	"interruptible_echo_direct_msg_with_interrupt", mb.send);

	/* Let the secondary get started and wait for a message. */
	res = ffa_run(SERVICE_VM1, 0);
	EXPECT_EQ(res.func, FFA_MSG_WAIT_32);
	EXPECT_EQ(res.arg2, FFA_SLEEP_INDEFINITE);

	/* Inject an interrupt to the secondary VM */
	hf_interrupt_inject(SERVICE_VM1, 0, EXTERNAL_INTERRUPT_ID_A);

	/*
	* Send a direct message request. Expect the secondary VM to receive
	* the message and the interrupt together. The secondary VM then
	* replies with a direct message response.
	*/
	res = ffa_msg_send_direct_req(HF_PRIMARY_VM_ID, SERVICE_VM1, 1, 0, 0, 0,
	0);
	EXPECT_EQ(res.func, FFA_MSG_SEND_DIRECT_RESP_32);
	EXPECT_EQ(res.arg3, 2);
	}