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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 <stropts.h>
#include <strings.h>
#include <signal.h>
#include <setjmp.h>
#include <libgen.h>
#include <sys/vmm.h>
#include <sys/vmm_dev.h>
#include <sys/mman.h>
#include <vmmapi.h>
#include "common.h"
#define TEST_SEGID 0
#define PAGE_CNT 1024
#define PAGE_SZ 4096
#define SEG_SZ (PAGE_CNT * PAGE_SZ)
int
main(int argc, char *argv[])
{
struct vmctx *ctx;
int res, fd;
void *seg_obj, *guest_mem;
const char *suite_name = basename(argv[0]);
ctx = create_test_vm(suite_name);
if (ctx == NULL) {
perror("could open test VM");
return (1);
}
fd = vm_get_device_fd(ctx);
res = alloc_memseg(ctx, TEST_SEGID, SEG_SZ, "test_seg");
if (res != 0) {
perror("could not alloc memseg");
goto bail;
}
off_t seg_obj_off;
res = vm_get_devmem_offset(ctx, TEST_SEGID, &seg_obj_off);
if (res != 0) {
perror("could not find mapping offset for seg object");
goto bail;
}
seg_obj = mmap(NULL, SEG_SZ, PROT_READ | PROT_WRITE, MAP_SHARED,
fd, seg_obj_off);
if (seg_obj == MAP_FAILED) {
perror("could not mmap seg object");
goto bail;
}
/* populate with initial data */
for (uint_t i = 0; i < PAGE_CNT; i++) {
uint64_t *p = (uint64_t *)((uintptr_t)seg_obj + i * PAGE_SZ);
*p = i;
}
res = vm_mmap_memseg(ctx, 0, TEST_SEGID, 0, SEG_SZ, PROT_ALL);
if (res != 0) {
perror("could not map memseg into vmspace");
goto bail;
}
guest_mem = mmap(NULL, SEG_SZ, PROT_READ | PROT_WRITE, MAP_SHARED,
fd, 0);
if (seg_obj == MAP_FAILED) {
perror("could not mmap vmspace");
goto bail;
}
/* check data and access though vmspace */
for (uint_t i = 0; i < PAGE_CNT; i++) {
const uint64_t off = i * PAGE_SZ;
uint64_t *p = (uint64_t *)((uintptr_t)guest_mem + off);
const uint64_t val = *p;
if (val != i) {
(void) printf("%lu != %u at gpa:%lx\n", val, i, off);
goto bail;
}
/* leave a change behind */
*p = val * 2;
}
/* check changes made through vmspace */
for (uint_t i = 0; i < PAGE_CNT; i++) {
const uint64_t off = i * PAGE_SZ;
uint64_t *p = (uint64_t *)((uintptr_t)seg_obj + off);
const uint_t expected = i * 2;
const uint64_t val = *p;
if (val != expected) {
(void) printf("%lu != %u at gpa:%lx\n", val, expected,
off);
goto bail;
}
}
/* unmap access mappings */
res = munmap(guest_mem, SEG_SZ);
if (res != 0) {
perror("could not munmap vmspace");
goto bail;
}
res = munmap(seg_obj, SEG_SZ);
if (res != 0) {
perror("could not munmap seg object");
goto bail;
}
/* mission accomplished */
vm_destroy(ctx);
(void) printf("%s\tPASS\n", suite_name);
return (0);
bail:
vm_destroy(ctx);
return (1);
}
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