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smbios: build legacy mode code only for 'pc' machine

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basically moving code around without functional change.
And exposing some symbols so that they could be shared
between smbbios.c and new smbios_legacy.c

plus some meson magic to build smbios_legacy.c only
for 'pc' machine and otherwise replace it with stub
if not selected.

Signed-off-by: Igor Mammedov <imammedo@redhat.com>
Reviewed-by: Ani Sinha <anisinha@redhat.com>
Message-Id: <20240314152302.2324164-12-imammedo@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
This commit is contained in:
Igor Mammedov 2024-03-14 16:22:52 +01:00 committed by Michael S. Tsirkin
parent d638a8659b
commit b42b0e4daa
7 changed files with 207 additions and 163 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
hw/i386/Kconfig
View File

@ -76,6 +76,7 @@ config I440FX
select PIIX
select DIMM
select SMBIOS
select SMBIOS_LEGACY
select FW_CFG_DMA
config ISAPC

2
hw/smbios/Kconfig
View File

@ -1,2 +1,4 @@
config SMBIOS
bool
config SMBIOS_LEGACY
bool

4
hw/smbios/meson.build
View File

@ -4,5 +4,9 @@ smbios_ss.add(when: 'CONFIG_IPMI',
if_true: files('smbios_type_38.c'),
if_false: files('smbios_type_38-stub.c'))
smbios_ss.add(when: 'CONFIG_SMBIOS_LEGACY',
if_true: files('smbios_legacy.c'),
if_false: files('smbios_legacy_stub.c'))
system_ss.add_all(when: 'CONFIG_SMBIOS', if_true: smbios_ss)
system_ss.add(when: 'CONFIG_SMBIOS', if_false: files('smbios-stub.c'))

164
hw/smbios/smbios.c
View File

@ -31,38 +31,12 @@
#include "hw/pci/pci_device.h"
#include "smbios_build.h"
/* legacy structures and constants for <= 2.0 machines */
struct smbios_header {
uint16_t length;
uint8_t type;
} QEMU_PACKED;
struct smbios_field {
struct smbios_header header;
uint8_t type;
uint16_t offset;
uint8_t data[];
} QEMU_PACKED;
struct smbios_table {
struct smbios_header header;
uint8_t data[];
} QEMU_PACKED;
#define SMBIOS_FIELD_ENTRY 0
#define SMBIOS_TABLE_ENTRY 1
static uint8_t *smbios_entries;
static size_t smbios_entries_len;
static bool smbios_uuid_encoded = true;
/* end: legacy structures & constants for <= 2.0 machines */
/*
* SMBIOS tables provided by user with '-smbios file=<foo>' option
*/
uint8_t *usr_blobs;
size_t usr_blobs_len;
static GArray *usr_blobs_sizes;
static unsigned usr_table_max;
static unsigned usr_table_cnt;
@ -546,7 +520,7 @@ static void smbios_check_type4_count(uint32_t expected_t4_count)
}
}
static void smbios_validate_table(void)
void smbios_validate_table(void)
{
if (smbios_ep_type == SMBIOS_ENTRY_POINT_TYPE_32 &&
smbios_tables_len > SMBIOS_21_MAX_TABLES_LEN) {
@ -556,134 +530,6 @@ static void smbios_validate_table(void)
}
}
/* legacy setup functions for <= 2.0 machines */
static void smbios_add_field(int type, int offset, const void *data, size_t len)
{
struct smbios_field *field;
if (!smbios_entries) {
smbios_entries_len = sizeof(uint16_t);
smbios_entries = g_malloc0(smbios_entries_len);
}
smbios_entries = g_realloc(smbios_entries, smbios_entries_len +
sizeof(*field) + len);
field = (struct smbios_field *)(smbios_entries + smbios_entries_len);
field->header.type = SMBIOS_FIELD_ENTRY;
field->header.length = cpu_to_le16(sizeof(*field) + len);
field->type = type;
field->offset = cpu_to_le16(offset);
memcpy(field->data, data, len);
smbios_entries_len += sizeof(*field) + len;
(*(uint16_t *)smbios_entries) =
cpu_to_le16(le16_to_cpu(*(uint16_t *)smbios_entries) + 1);
}
static void smbios_maybe_add_str(int type, int offset, const char *data)
{
if (data) {
smbios_add_field(type, offset, data, strlen(data) + 1);
}
}
static void smbios_build_type_0_fields(void)
{
smbios_maybe_add_str(0, offsetof(struct smbios_type_0, vendor_str),
smbios_type0.vendor);
smbios_maybe_add_str(0, offsetof(struct smbios_type_0, bios_version_str),
smbios_type0.version);
smbios_maybe_add_str(0, offsetof(struct smbios_type_0,
bios_release_date_str),
smbios_type0.date);
if (smbios_type0.have_major_minor) {
smbios_add_field(0, offsetof(struct smbios_type_0,
system_bios_major_release),
&smbios_type0.major, 1);
smbios_add_field(0, offsetof(struct smbios_type_0,
system_bios_minor_release),
&smbios_type0.minor, 1);
}
}
static void smbios_build_type_1_fields(void)
{
smbios_maybe_add_str(1, offsetof(struct smbios_type_1, manufacturer_str),
smbios_type1.manufacturer);
smbios_maybe_add_str(1, offsetof(struct smbios_type_1, product_name_str),
smbios_type1.product);
smbios_maybe_add_str(1, offsetof(struct smbios_type_1, version_str),
smbios_type1.version);
smbios_maybe_add_str(1, offsetof(struct smbios_type_1, serial_number_str),
smbios_type1.serial);
smbios_maybe_add_str(1, offsetof(struct smbios_type_1, sku_number_str),
smbios_type1.sku);
smbios_maybe_add_str(1, offsetof(struct smbios_type_1, family_str),
smbios_type1.family);
if (qemu_uuid_set) {
/* We don't encode the UUID in the "wire format" here because this
* function is for legacy mode and needs to keep the guest ABI, and
* because we don't know what's the SMBIOS version advertised by the
* BIOS.
*/
smbios_add_field(1, offsetof(struct smbios_type_1, uuid),
&qemu_uuid, 16);
}
}
uint8_t *smbios_get_table_legacy(size_t *length)
{
int i;
size_t usr_offset;
/* also complain if fields were given for types > 1 */
if (find_next_bit(smbios_have_fields_bitmap,
SMBIOS_MAX_TYPE + 1, 2) < SMBIOS_MAX_TYPE + 1) {
error_report("can't process fields for smbios "
"types > 1 on machine versions < 2.1!");
exit(1);
}
if (test_bit(4, smbios_have_binfile_bitmap)) {
error_report("can't process table for smbios "
"type 4 on machine versions < 2.1!");
exit(1);
}
g_free(smbios_entries);
smbios_entries_len = sizeof(uint16_t);
smbios_entries = g_malloc0(smbios_entries_len);
for (i = 0, usr_offset = 0; usr_blobs_sizes && i < usr_blobs_sizes->len;
i++)
{
struct smbios_table *table;
struct smbios_structure_header *header;
size_t size = g_array_index(usr_blobs_sizes, size_t, i);
header = (struct smbios_structure_header *)(usr_blobs + usr_offset);
smbios_entries = g_realloc(smbios_entries, smbios_entries_len +
size + sizeof(*table));
table = (struct smbios_table *)(smbios_entries + smbios_entries_len);
table->header.type = SMBIOS_TABLE_ENTRY;
table->header.length = cpu_to_le16(sizeof(*table) + size);
memcpy(table->data, header, size);
smbios_entries_len += sizeof(*table) + size;
(*(uint16_t *)smbios_entries) =
cpu_to_le16(le16_to_cpu(*(uint16_t *)smbios_entries) + 1);
usr_offset += size;
}
smbios_build_type_0_fields();
smbios_build_type_1_fields();
smbios_validate_table();
*length = smbios_entries_len;
return smbios_entries;
}
/* end: legacy setup functions for <= 2.0 machines */
bool smbios_skip_table(uint8_t type, bool required_table)
{
if (test_bit(type, smbios_have_binfile_bitmap)) {
@ -1403,14 +1249,6 @@ static bool save_opt_list(size_t *ndest, char ***dest, QemuOpts *opts,
return true;
}
static void smbios_add_usr_blob_size(size_t size)
{
if (!usr_blobs_sizes) {
usr_blobs_sizes = g_array_new(false, false, sizeof(size_t));
}
g_array_append_val(usr_blobs_sizes, size);
}
void smbios_entry_add(QemuOpts *opts, Error **errp)
{
const char *val;

179
hw/smbios/smbios_legacy.c Normal file
View File

@ -0,0 +1,179 @@
/*
* SMBIOS legacy support
*
* Copyright (C) 2009 Hewlett-Packard Development Company, L.P.
* Copyright (C) 2013 Red Hat, Inc.
*
* Authors:
* Alex Williamson <alex.williamson@hp.com>
* Markus Armbruster <armbru@redhat.com>
*
* This work is licensed under the terms of the GNU GPL, version 2. See
* the COPYING file in the top-level directory.
*
* Contributions after 2012-01-13 are licensed under the terms of the
* GNU GPL, version 2 or (at your option) any later version.
*/
#include "qemu/osdep.h"
#include "qemu/bswap.h"
#include "hw/firmware/smbios.h"
#include "sysemu/sysemu.h"
#include "qemu/error-report.h"
struct smbios_header {
uint16_t length;
uint8_t type;
} QEMU_PACKED;
struct smbios_field {
struct smbios_header header;
uint8_t type;
uint16_t offset;
uint8_t data[];
} QEMU_PACKED;
struct smbios_table {
struct smbios_header header;
uint8_t data[];
} QEMU_PACKED;
#define SMBIOS_FIELD_ENTRY 0
#define SMBIOS_TABLE_ENTRY 1
static uint8_t *smbios_entries;
static size_t smbios_entries_len;
GArray *usr_blobs_sizes;
void smbios_add_usr_blob_size(size_t size)
{
if (!usr_blobs_sizes) {
usr_blobs_sizes = g_array_new(false, false, sizeof(size_t));
}
g_array_append_val(usr_blobs_sizes, size);
}
static void smbios_add_field(int type, int offset, const void *data, size_t len)
{
struct smbios_field *field;
if (!smbios_entries) {
smbios_entries_len = sizeof(uint16_t);
smbios_entries = g_malloc0(smbios_entries_len);
}
smbios_entries = g_realloc(smbios_entries, smbios_entries_len +
sizeof(*field) + len);
field = (struct smbios_field *)(smbios_entries + smbios_entries_len);
field->header.type = SMBIOS_FIELD_ENTRY;
field->header.length = cpu_to_le16(sizeof(*field) + len);
field->type = type;
field->offset = cpu_to_le16(offset);
memcpy(field->data, data, len);
smbios_entries_len += sizeof(*field) + len;
(*(uint16_t *)smbios_entries) =
cpu_to_le16(le16_to_cpu(*(uint16_t *)smbios_entries) + 1);
}
static void smbios_maybe_add_str(int type, int offset, const char *data)
{
if (data) {
smbios_add_field(type, offset, data, strlen(data) + 1);
}
}
static void smbios_build_type_0_fields(void)
{
smbios_maybe_add_str(0, offsetof(struct smbios_type_0, vendor_str),
smbios_type0.vendor);
smbios_maybe_add_str(0, offsetof(struct smbios_type_0, bios_version_str),
smbios_type0.version);
smbios_maybe_add_str(0, offsetof(struct smbios_type_0,
bios_release_date_str),
smbios_type0.date);
if (smbios_type0.have_major_minor) {
smbios_add_field(0, offsetof(struct smbios_type_0,
system_bios_major_release),
&smbios_type0.major, 1);
smbios_add_field(0, offsetof(struct smbios_type_0,
system_bios_minor_release),
&smbios_type0.minor, 1);
}
}
static void smbios_build_type_1_fields(void)
{
smbios_maybe_add_str(1, offsetof(struct smbios_type_1, manufacturer_str),
smbios_type1.manufacturer);
smbios_maybe_add_str(1, offsetof(struct smbios_type_1, product_name_str),
smbios_type1.product);
smbios_maybe_add_str(1, offsetof(struct smbios_type_1, version_str),
smbios_type1.version);
smbios_maybe_add_str(1, offsetof(struct smbios_type_1, serial_number_str),
smbios_type1.serial);
smbios_maybe_add_str(1, offsetof(struct smbios_type_1, sku_number_str),
smbios_type1.sku);
smbios_maybe_add_str(1, offsetof(struct smbios_type_1, family_str),
smbios_type1.family);
if (qemu_uuid_set) {
/*
* We don't encode the UUID in the "wire format" here because this
* function is for legacy mode and needs to keep the guest ABI, and
* because we don't know what's the SMBIOS version advertised by the
* BIOS.
*/
smbios_add_field(1, offsetof(struct smbios_type_1, uuid),
&qemu_uuid, 16);
}
}
uint8_t *smbios_get_table_legacy(size_t *length)
{
int i;
size_t usr_offset;
/* complain if fields were given for types > 1 */
if (find_next_bit(smbios_have_fields_bitmap,
SMBIOS_MAX_TYPE + 1, 2) < SMBIOS_MAX_TYPE + 1) {
error_report("can't process fields for smbios "
"types > 1 on machine versions < 2.1!");
exit(1);
}
if (test_bit(4, smbios_have_binfile_bitmap)) {
error_report("can't process table for smbios "
"type 4 on machine versions < 2.1!");
exit(1);
}
g_free(smbios_entries);
smbios_entries_len = sizeof(uint16_t);
smbios_entries = g_malloc0(smbios_entries_len);
for (i = 0, usr_offset = 0; usr_blobs_sizes && i < usr_blobs_sizes->len;
i++)
{
struct smbios_table *table;
struct smbios_structure_header *header;
size_t size = g_array_index(usr_blobs_sizes, size_t, i);
header = (struct smbios_structure_header *)(usr_blobs + usr_offset);
smbios_entries = g_realloc(smbios_entries, smbios_entries_len +
size + sizeof(*table));
table = (struct smbios_table *)(smbios_entries + smbios_entries_len);
table->header.type = SMBIOS_TABLE_ENTRY;
table->header.length = cpu_to_le16(sizeof(*table) + size);
memcpy(table->data, header, size);
smbios_entries_len += sizeof(*table) + size;
(*(uint16_t *)smbios_entries) =
cpu_to_le16(le16_to_cpu(*(uint16_t *)smbios_entries) + 1);
usr_offset += size;
}
smbios_build_type_0_fields();
smbios_build_type_1_fields();
smbios_validate_table();
*length = smbios_entries_len;
return smbios_entries;
}

15
hw/smbios/smbios_legacy_stub.c Normal file
View File

@ -0,0 +1,15 @@
/*
* IPMI SMBIOS firmware handling
*
* Copyright (c) 2024 Igor Mammedov, Red Hat, Inc.
*
* This work is licensed under the terms of the GNU GPL, version 2 or later.
* See the COPYING file in the top-level directory.
*/
#include "qemu/osdep.h"
#include "hw/firmware/smbios.h"
void smbios_add_usr_blob_size(size_t size)
{
}

5
include/hw/firmware/smbios.h
View File

@ -17,6 +17,9 @@
*
*/
extern uint8_t *usr_blobs;
extern GArray *usr_blobs_sizes;
typedef struct {
const char *vendor, *version, *date;
bool have_major_minor, uefi;
@ -323,6 +326,8 @@ struct smbios_type_127 {
struct smbios_structure_header header;
} QEMU_PACKED;
void smbios_validate_table(void);
void smbios_add_usr_blob_size(size_t size);
void smbios_entry_add(QemuOpts *opts, Error **errp);
void smbios_set_cpuid(uint32_t version, uint32_t features);
void smbios_set_defaults(const char *manufacturer, const char *product,