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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"
enum test_segs {
SEG_LOWMEM = 0,
SEG_BOOTROM = 1,
};
#define PAGE_CNT 2
#define PAGE_SZ 4096
#define SEG_SZ (PAGE_CNT * PAGE_SZ)
#define WHOLE_SZ (SEG_SZ * 2)
#define TESTVAL_LOWMEM 0x1000ffff
#define TESTVAL_BOOTROM 0x2000eeee
int
main(int argc, char *argv[])
{
struct vmctx *ctx;
int res, fd;
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, SEG_LOWMEM, SEG_SZ, "");
if (res != 0) {
perror("could not alloc lowmem seg");
goto bail;
}
res = alloc_memseg(ctx, SEG_BOOTROM, SEG_SZ, "bootrom");
if (res != 0) {
perror("could not alloc bootrom seg");
goto bail;
}
res = vm_mmap_memseg(ctx, 0, SEG_LOWMEM, 0, SEG_SZ, PROT_ALL);
if (res != 0) {
perror("could not map lowmem into vmspace");
goto bail;
}
res = vm_mmap_memseg(ctx, SEG_SZ, SEG_BOOTROM, 0, SEG_SZ, PROT_READ);
if (res != 0) {
perror("could not map bootrom into vmspace");
goto bail;
}
void *guest_mem;
guest_mem = mmap(NULL, WHOLE_SZ, PROT_READ, MAP_SHARED, fd, 0);
if (guest_mem == MAP_FAILED) {
perror("could not mmap guest-physical memory");
goto bail;
}
void *direct_lowmem, *direct_bootrom;
off_t seg_obj_off;
res = vm_get_devmem_offset(ctx, SEG_LOWMEM, &seg_obj_off);
if (res != 0) {
perror("could not find mapping offset for lowmem seg");
goto bail;
}
direct_lowmem = mmap(NULL, SEG_SZ, PROT_READ | PROT_WRITE, MAP_SHARED,
fd, seg_obj_off);
if (direct_lowmem == MAP_FAILED) {
perror("could not mmap lowmem directly");
goto bail;
}
res = vm_get_devmem_offset(ctx, SEG_BOOTROM, &seg_obj_off);
if (res != 0) {
perror("could not find mapping offset for lowmem seg");
goto bail;
}
direct_bootrom = mmap(NULL, SEG_SZ, PROT_READ | PROT_WRITE, MAP_SHARED,
fd, seg_obj_off);
if (direct_bootrom == MAP_FAILED) {
perror("could not mmap bootrom directly");
goto bail;
}
uint32_t *datap;
datap = direct_lowmem;
*datap = TESTVAL_LOWMEM;
datap = direct_bootrom;
*datap = TESTVAL_BOOTROM;
/* check that data written though direct access is as expected */
datap = guest_mem;
if (*datap != TESTVAL_LOWMEM) {
(void) fprintf(stderr, "unexpected data in lowmem %x != %x\n",
*datap, TESTVAL_LOWMEM);
goto bail;
}
datap = (guest_mem + SEG_SZ);
if (*datap != TESTVAL_BOOTROM) {
(void) fprintf(stderr, "unexpected data in bootrom %x != %x\n",
*datap, TESTVAL_BOOTROM);
goto bail;
}
/* unmap access mappings */
res = munmap(guest_mem, WHOLE_SZ);
if (res != 0) {
perror("could not munmap vmspace");
goto bail;
}
res = munmap(direct_lowmem, SEG_SZ);
if (res != 0) {
perror("could not munmap lowmem object");
goto bail;
}
res = munmap(direct_bootrom, SEG_SZ);
if (res != 0) {
perror("could not munmap bootrom 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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