/*
 * This file and its contents are supplied under the terms of the
 * Common Development and Distribution License ("CDDL"), version 1.0.
 * You may only use this file in accordance with the terms of version
 * 1.0 of the CDDL.
 *
 * A full copy of the text of the CDDL should have accompanied this
 * source.  A copy of the CDDL is also available via the Internet at
 * http://www.illumos.org/license/CDDL.
 */

/*
 * Copyright 2023 Oxide Computer Company
 */

#include <stdio.h>
#include <unistd.h>
#include <stdlib.h>
#include <strings.h>
#include <libgen.h>
#include <assert.h>
#include <signal.h>
#include <errno.h>

#include <sys/types.h>
#include <sys/sysmacros.h>
#include <sys/debug.h>
#include <sys/vmm.h>
#include <sys/vmm_dev.h>
#include <vmmapi.h>

#include "in_guest.h"
#include "test_defs.h"

static bool timed_out = false;

static void
sigalrm_handler(int sig)
{
        timed_out = true;
}

static void
configure_timeout(uint_t seconds)
{
        struct sigaction sa = {
                .sa_handler = sigalrm_handler,
        };
        struct sigaction old_sa;
        if (sigaction(SIGALRM, &sa, &old_sa) != 0) {
                test_fail_errno(errno,
                    "could not prep signal handling for bad access");
        }
        (void) alarm(seconds);
}

int
main(int argc, char *argv[])
{
        const char *test_suite_name = basename(argv[0]);
        struct vmctx *ctx = NULL;
        struct vcpu *vcpu;
        int err;

        ctx = test_initialize(test_suite_name);

        if ((vcpu = vm_vcpu_open(ctx, 0)) == NULL) {
                test_fail_errno(errno, "Could not open vcpu0");
        }

        err = test_setup_vcpu(vcpu, MEM_LOC_PAYLOAD, MEM_LOC_STACK);
        if (err != 0) {
                test_fail_errno(err, "Could not initialize vcpu0");
        }

        timespec_t ts = { 0 };
        err = vm_rtc_settime(ctx, &ts);
        if (err != 0) {
                test_fail_errno(err, "Could zero out RTC time");
        }

        /* A successful payload should be wrapped up well before 8 seconds */
        configure_timeout(8);

        struct vm_entry ventry = { 0 };
        struct vm_exit vexit = { 0 };

        do {
                const enum vm_exit_kind kind =
                    test_run_vcpu(vcpu, &ventry, &vexit);

                if (timed_out) {
                        test_fail_msg("test timed out\n");
                }

                switch (kind) {
                case VEK_REENTR:
                        break;
                case VEK_TEST_PASS:
                        test_pass();
                        break;
                case VEK_TEST_FAIL:
                        test_fail();
                        break;
                case VEK_TEST_MSG:
                        test_msg_print(ctx);
                        break;
                default:
                        test_fail_vmexit(&vexit);
                        break;
                }
        } while (true);
}