Differential D26976 Diff 94881 usr.sbin/bhyve/arm64/bootrom.c

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usr.sbin/bhyve/arm64/bootrom.c

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				/*-
				* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
				*
				* Copyright (c) 2015 Neel Natu <neel@freebsd.org>
				* All rights reserved.
				*
				* Redistribution and use in source and binary forms, with or without
				* modification, are permitted provided that the following conditions
				* are met:
				* 1. Redistributions of source code must retain the above copyright
				* notice, this list of conditions and the following disclaimer.
				* 2. Redistributions in binary form must reproduce the above copyright
				* notice, this list of conditions and the following disclaimer in the
				* documentation and/or other materials provided with the distribution.
				*
				* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND
				* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
				* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
				* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
				* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
				* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
				* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
				* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
				* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
				* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
				* SUCH DAMAGE.
				*/

				#include <sys/param.h>
				__FBSDID("$FreeBSD$");

				#include <sys/types.h>
				#include <sys/mman.h>
				#include <sys/stat.h>

				#include <machine/vmm.h>

				#include <err.h>
				#include <errno.h>
				#include <fcntl.h>
				#include <stdio.h>
				#include <string.h>
				#include <unistd.h>
				#include <stdbool.h>

				#include <vmmapi.h>
				#include "bhyverun.h"
				#include "bootrom.h"
				#include "debug.h"

				int
				bootrom_alloc(struct vmctx ctx, uint64_t gpa, size_t len, char **base)
				{
				if (len == 0) {
				warnx("ROM size %zu is invalid", len);
				return (EINVAL);
				}

				len = roundup2(len, PAGE_SIZE);
				base = vm_map_ipa(ctx, gpa, len);

				printf("%s: gpa=%#lx base=%#lx\n", __func__, gpa, (uint64_t)base);

				return (0);
				}

				int
				bootrom_loadrom(struct vmctx ctx, const char romfile, uint64_t *gpa)
				{
				struct stat sbuf;
				ssize_t rlen;
				char *base;
				int fd, i, rv;

				rv = -1;
				fd = open(romfile, O_RDONLY);
				if (fd < 0) {
				EPRINTLN("Error opening bootrom \"%s\": %s",
				romfile, strerror(errno));
				goto done;
				}

				if (fstat(fd, &sbuf) < 0) {
				EPRINTLN("Could not fstat bootrom file \"%s\": %s",
				romfile, strerror(errno));
				goto done;
				}

				/* Map the bootrom into the guest address space */
				if (bootrom_alloc(ctx, gpa, sbuf.st_size, &base) != 0)
				goto done;

				/* Read 'romfile' into the guest address space */
				for (i = 0; i < sbuf.st_size / PAGE_SIZE; i++) {
				rlen = read(fd, base + i * PAGE_SIZE, PAGE_SIZE);
				if (rlen != PAGE_SIZE) {
				perror("read");
				EPRINTLN("Incomplete read of page %d of bootrom "
				"file %s: %ld bytes", i, romfile, rlen);
				goto done;
				}
				}

				if (sbuf.st_size % PAGE_SIZE != 0) {
				rlen = read(fd, base + i * PAGE_SIZE, sbuf.st_size % PAGE_SIZE);
				if (rlen != sbuf.st_size % PAGE_SIZE) {
				perror("read");
				EPRINTLN("Incomplete read of page %d of bootrom "
				"file %s: %ld bytes", i, romfile, rlen);
				goto done;
				}
				}

				printf("Finished reading bootrom\n");
				rv = 0;
				done:
				if (fd >= 0)
				close(fd);
				return (rv);
				}