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/*
* 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 2022 Oxide Computer Company
*/
#include <stdio.h>
#include <unistd.h>
#include <stdlib.h>
#include <strings.h>
#include <libgen.h>
#include <assert.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"
#define MMIO_TEST_BASE 0x10001000
#define MMIO_TEST_END 0x10002000
static bool
handle_test_mmio(const struct vm_exit *vexit, struct vm_entry *ventry)
{
/* expecting only reads */
if (vexit->u.mmio.read == 0) {
return (false);
}
/* expecting only in the [0x10001000 - 0x10002000) range */
if (vexit->u.mmio.gpa < MMIO_TEST_BASE ||
vexit->u.mmio.gpa >= MMIO_TEST_END) {
return (false);
}
/*
* Emit a pattern of the lowest 16 bits of the address, ascending by the
* 2-byte stride for every 2 additional bytes, as the result.
*
* For example, an 8-byte read of 0x00001234 would result in:
* 0x123a123812361234 being returned
*/
const uint16_t addr = vexit->u.mmio.gpa;
uint64_t val = 0;
switch (vexit->u.mmio.bytes) {
case 8:
val |= (uint64_t)(addr + 6) << 48;
val |= (uint64_t)(addr + 4) << 32;
/* FALLTHROUGH */
case 4:
val |= (uint32_t)(addr + 2) << 16;
/* FALLTHROUGH */
case 2:
val |= addr;
break;
default:
/* expect only 2/4/8-byte reads */
return (false);
}
ventry_fulfill_mmio(vexit, ventry, val);
return (true);
}
int
main(int argc, char *argv[])
{
const char *test_suite_name = basename(argv[0]);
struct vmctx *ctx = NULL;
int err;
ctx = test_initialize(test_suite_name);
err = test_setup_vcpu(ctx, 0, MEM_LOC_PAYLOAD, MEM_LOC_STACK);
if (err != 0) {
test_fail_errno(err, "Could not initialize vcpu0");
}
struct vm_entry ventry = { 0 };
struct vm_exit vexit = { 0 };
do {
const enum vm_exit_kind kind =
test_run_vcpu(ctx, 0, &ventry, &vexit);
switch (kind) {
case VEK_REENTR:
break;
case VEK_UNHANDLED:
if (!handle_test_mmio(&vexit, &ventry)) {
test_fail_vmexit(&vexit);
}
break;
case VEK_TEST_PASS:
test_pass();
break;
case VEK_TEST_FAIL:
default:
test_fail_vmexit(&vexit);
break;
}
} while (true);
}
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