qemu: Add support for SMBIOS command line otions (Alex Williamson)

Create a new -smbios option (x86-only) to allow binary SMBIOS entries
to be passed through to the BIOS or modify the default values of
individual fields of type 0 and 1 entries on the command line.

Binary SMBIOS entries can be generated as follows:

dmidecode -t 1 -u | grep $'^\t\t[^"]' | xargs -n1 | \
        perl -lne 'printf "%c", hex($_)' > smbios_type_1.bin

These can then be passed to the BIOS using this switch:

 -smbios file=smbios_type_1.bin

Command line generation supports the following syntax:

 -smbios type=0[,vendor=str][,version=str][,date=str][,release=%d.%d]
 -smbios type=1[,manufacturer=str][,product=str][,version=str][,serial=str]
              [,uuid=$(uuidgen)][,sku=str][,family=str]

For instance, to add a serial number to the type 1 table:

 -smbios type=1,serial=0123456789

Interface is extensible to support more fields/tables as needed.

aliguori: remove texi formatting from help output

Signed-off-by: Alex Williamson <alex.williamson@hp.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>



git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@7163 c046a42c-6fe2-441c-8c8c-71466251a162

1 files changed, 224 insertions, 0 deletions

diff --git a/hw/smbios.c b/hw/smbios.c
new file mode 100644
index 0000000..ced90ce
--- /dev/null
+++ b/hw/smbios.c
@@ -0,0 +1,224 @@
+/*
+ * SMBIOS Support
+ *
+ * Copyright (C) 2009 Hewlett-Packard Development Company, L.P.
+ *
+ * Authors:
+ *  Alex Williamson <alex.williamson@hp.com>
+ *
+ * This work is licensed under the terms of the GNU GPL, version 2.  See
+ * the COPYING file in the top-level directory.
+ *
+ */
+
+#include "sysemu.h"
+#include "smbios.h"
+
+/*
+ * Structures shared with the BIOS
+ */
+struct smbios_header {
+    uint16_t length;
+    uint8_t type;
+} __attribute__((__packed__));
+
+struct smbios_field {
+    struct smbios_header header;
+    uint8_t type;
+    uint16_t offset;
+    uint8_t data[];
+} __attribute__((__packed__));
+
+struct smbios_table {
+    struct smbios_header header;
+    uint8_t data[];
+} __attribute__((__packed__));
+
+#define SMBIOS_FIELD_ENTRY 0
+#define SMBIOS_TABLE_ENTRY 1
+
+
+static uint8_t *smbios_entries;
+static size_t smbios_entries_len;
+
+uint8_t *smbios_get_table(size_t *length)
+{
+    *length = smbios_entries_len;
+    return smbios_entries;
+}
+
+/*
+ * To avoid unresolvable overlaps in data, don't allow both
+ * tables and fields for the same smbios type.
+ */
+static void smbios_check_collision(int type, int entry)
+{
+    uint16_t *num_entries = (uint16_t *)smbios_entries;
+    struct smbios_header *header;
+    char *p;
+    int i;
+
+    if (!num_entries)
+        return;
+
+    p = (char *)(num_entries + 1);
+
+    for (i = 0; i < *num_entries; i++) {
+        header = (struct smbios_header *)p;
+        if (entry == SMBIOS_TABLE_ENTRY && header->type == SMBIOS_FIELD_ENTRY) {
+            struct smbios_field *field = (void *)header;
+            if (type == field->type) {
+                fprintf(stderr, "SMBIOS type %d field already defined, "
+                                "cannot add table\n", type);
+                exit(1);
+            }
+        } else if (entry == SMBIOS_FIELD_ENTRY &&
+                   header->type == SMBIOS_TABLE_ENTRY) {
+            struct smbios_structure_header *table = (void *)(header + 1);
+            if (type == table->type) {
+                fprintf(stderr, "SMBIOS type %d table already defined, "
+                                "cannot add field\n", type);
+                exit(1);
+            }
+        }
+        p += le16_to_cpu(header->length);
+    }
+}
+
+void smbios_add_field(int type, int offset, int len, void *data)
+{
+    struct smbios_field *field;
+
+    smbios_check_collision(type, SMBIOS_FIELD_ENTRY);
+
+    if (!smbios_entries) {
+        smbios_entries_len = sizeof(uint16_t);
+        smbios_entries = qemu_mallocz(smbios_entries_len);
+    }
+    smbios_entries = qemu_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_build_type_0_fields(const char *t)
+{
+    char buf[1024];
+
+    if (get_param_value(buf, sizeof(buf), "vendor", t))
+        smbios_add_field(0, offsetof(struct smbios_type_0, vendor_str),
+                         strlen(buf) + 1, buf);
+    if (get_param_value(buf, sizeof(buf), "version", t))
+        smbios_add_field(0, offsetof(struct smbios_type_0, bios_version_str),
+                         strlen(buf) + 1, buf);
+    if (get_param_value(buf, sizeof(buf), "date", t))
+        smbios_add_field(0, offsetof(struct smbios_type_0,
+                                     bios_release_date_str),
+                                     strlen(buf) + 1, buf);
+    if (get_param_value(buf, sizeof(buf), "release", t)) {
+        int major, minor;
+        sscanf(buf, "%d.%d", &major, &minor);
+        smbios_add_field(0, offsetof(struct smbios_type_0,
+                                     system_bios_major_release), 1, &major);
+        smbios_add_field(0, offsetof(struct smbios_type_0,
+                                     system_bios_minor_release), 1, &minor);
+    }
+}
+
+static void smbios_build_type_1_fields(const char *t)
+{
+    char buf[1024];
+
+    if (get_param_value(buf, sizeof(buf), "manufacturer", t))
+        smbios_add_field(1, offsetof(struct smbios_type_1, manufacturer_str),
+                         strlen(buf) + 1, buf);
+    if (get_param_value(buf, sizeof(buf), "product", t))
+        smbios_add_field(1, offsetof(struct smbios_type_1, product_name_str),
+                         strlen(buf) + 1, buf);
+    if (get_param_value(buf, sizeof(buf), "version", t))
+        smbios_add_field(1, offsetof(struct smbios_type_1, version_str),
+                         strlen(buf) + 1, buf);
+    if (get_param_value(buf, sizeof(buf), "serial", t))
+        smbios_add_field(1, offsetof(struct smbios_type_1, serial_number_str),
+                         strlen(buf) + 1, buf);
+    if (get_param_value(buf, sizeof(buf), "uuid", t)) {
+        if (qemu_uuid_parse(buf, qemu_uuid) != 0) {
+            fprintf(stderr, "Invalid SMBIOS UUID string\n");
+            exit(1);
+        }
+    }
+    if (get_param_value(buf, sizeof(buf), "sku", t))
+        smbios_add_field(1, offsetof(struct smbios_type_1, sku_number_str),
+                         strlen(buf) + 1, buf);
+    if (get_param_value(buf, sizeof(buf), "family", t))
+        smbios_add_field(1, offsetof(struct smbios_type_1, family_str),
+                         strlen(buf) + 1, buf);
+}
+
+int smbios_entry_add(const char *t)
+{
+    char buf[1024];
+
+    if (get_param_value(buf, sizeof(buf), "file", t)) {
+        struct smbios_structure_header *header;
+        struct smbios_table *table;
+        int size = get_image_size(buf);
+
+        if (size < sizeof(struct smbios_structure_header)) {
+            fprintf(stderr, "Cannot read smbios file %s", buf);
+            exit(1);
+        }
+
+        if (!smbios_entries) {
+            smbios_entries_len = sizeof(uint16_t);
+            smbios_entries = qemu_mallocz(smbios_entries_len);
+        }
+
+        smbios_entries = qemu_realloc(smbios_entries, smbios_entries_len +
+                                                      sizeof(*table) + size);
+        table = (struct smbios_table *)(smbios_entries + smbios_entries_len);
+        table->header.type = SMBIOS_TABLE_ENTRY;
+        table->header.length = cpu_to_le16(sizeof(*table) + size);
+
+        if (load_image(buf, table->data) != size) {
+            fprintf(stderr, "Failed to load smbios file %s", buf);
+            exit(1);
+        }
+
+        header = (struct smbios_structure_header *)(table->data);
+        smbios_check_collision(header->type, SMBIOS_TABLE_ENTRY);
+
+        smbios_entries_len += sizeof(*table) + size;
+        (*(uint16_t *)smbios_entries) =
+                cpu_to_le16(le16_to_cpu(*(uint16_t *)smbios_entries) + 1);
+        return 0;
+    }
+
+    if (get_param_value(buf, sizeof(buf), "type", t)) {
+        unsigned long type = strtoul(buf, NULL, 0);
+        switch (type) {
+        case 0:
+            smbios_build_type_0_fields(t);
+            return 0;
+        case 1:
+            smbios_build_type_1_fields(t);
+            return 0;
+        default:
+            fprintf(stderr, "Don't know how to build fields for SMBIOS type "
+                    "%ld\n", type);
+            exit(1);
+        }
+    }
+
+    fprintf(stderr, "smbios: must specify type= or file=\n");
+    return -1;
+}