0012-load-smbios-entries-and-files-from-qemu.patch
15 KB
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qemu:bios: Load SMBIOS entries and files from qemu (Alex Williamson)
Allow SMBIOS fields to be overridden and entries replaced by those
read from qemu.
Signed-off-by: Alex Williamson <alex.williamson@hp.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
diff --git a/bios/rombios32.c b/bios/rombios32.c
index 7be4216..1a1ed64 100644
--- a/bios/rombios32.c
+++ b/bios/rombios32.c
@@ -441,7 +441,6 @@ uint32_t cpuid_features;
uint32_t cpuid_ext_features;
unsigned long ram_size;
uint64_t ram_end;
-uint8_t bios_uuid[16];
#ifdef BX_USE_EBDA_TABLES
unsigned long ebda_cur_addr;
#endif
@@ -471,6 +470,7 @@ void wrmsr_smp(uint32_t index, uint64_t val)
#define QEMU_CFG_UUID 0x02
#define QEMU_CFG_ARCH_LOCAL 0x8000
#define QEMU_CFG_ACPI_TABLES (QEMU_CFG_ARCH_LOCAL + 0)
+#define QEMU_CFG_SMBIOS_ENTRIES (QEMU_CFG_ARCH_LOCAL + 1)
int qemu_cfg_port;
@@ -519,19 +519,17 @@ static int acpi_load_table(int i, uint32_t addr, uint16_t *len)
qemu_cfg_read((uint8_t*)addr, *len);
return 0;
}
-#endif
-void uuid_probe(void)
+static uint16_t smbios_entries(void)
{
-#ifdef BX_QEMU
- if(qemu_cfg_port) {
- qemu_cfg_select(QEMU_CFG_UUID);
- qemu_cfg_read(bios_uuid, 16);
- return;
- }
-#endif
- memset(bios_uuid, 0, 16);
+ uint16_t cnt;
+
+ qemu_cfg_select(QEMU_CFG_SMBIOS_ENTRIES);
+ qemu_cfg_read((uint8_t*)&cnt, sizeof(cnt));
+
+ return cnt;
}
+#endif
void cpu_probe(void)
{
@@ -1963,21 +1961,105 @@ smbios_entry_point_init(void *start,
ep->intermediate_checksum = -sum;
}
+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 size_t
+smbios_load_field(int type, size_t offset, void *addr)
+{
+#ifdef BX_QEMU
+ int i;
+
+ for (i = smbios_entries(); i > 0; i--) {
+ struct smbios_field field;
+
+ qemu_cfg_read((uint8_t *)&field, sizeof(struct smbios_header));
+ field.header.length -= sizeof(struct smbios_header);
+
+ if (field.header.type != SMBIOS_FIELD_ENTRY) {
+ while (field.header.length--)
+ inb(QEMU_CFG_DATA_PORT);
+ continue;
+ }
+
+ qemu_cfg_read((uint8_t *)&field.type,
+ sizeof(field) - sizeof(struct smbios_header));
+ field.header.length -= sizeof(field) - sizeof(struct smbios_header);
+
+ if (field.type != type || field.offset != offset) {
+ while (field.header.length--)
+ inb(QEMU_CFG_DATA_PORT);
+ continue;
+ }
+
+ qemu_cfg_read(addr, field.header.length);
+ return (size_t)field.header.length;
+ }
+#endif
+ return 0;
+}
+
+#define load_str_field_with_default(type, field, def) do { \
+ size = smbios_load_field(type, offsetof(struct smbios_type_##type, \
+ field), end); \
+ if (size > 0) { \
+ end += size; \
+ } else { \
+ memcpy(end, def, sizeof(def)); \
+ end += sizeof(def); \
+ } \
+ p->field = ++str_index; \
+} while (0)
+
+#define load_str_field_or_skip(type, field) do { \
+ size = smbios_load_field(type, offsetof(struct smbios_type_##type, \
+ field), end); \
+ if (size > 0) { \
+ end += size; \
+ p->field = ++str_index; \
+ } else { \
+ p->field = 0; \
+ } \
+} while (0)
+
/* Type 0 -- BIOS Information */
#define RELEASE_DATE_STR "01/01/2007"
static void *
-smbios_type_0_init(void *start)
+smbios_init_type_0(void *start)
{
struct smbios_type_0 *p = (struct smbios_type_0 *)start;
+ char *end = (char *)start + sizeof(struct smbios_type_0);
+ size_t size;
+ int str_index = 0;
p->header.type = 0;
p->header.length = sizeof(struct smbios_type_0);
p->header.handle = 0;
- p->vendor_str = 1;
- p->bios_version_str = 1;
+ load_str_field_with_default(0, vendor_str, BX_APPNAME);
+ load_str_field_with_default(0, bios_version_str, BX_APPNAME);
+
p->bios_starting_address_segment = 0xe800;
- p->bios_release_date_str = 2;
+
+ load_str_field_with_default(0, bios_release_date_str, RELEASE_DATE_STR);
+
p->bios_rom_size = 0; /* FIXME */
memset(p->bios_characteristics, 0, 8);
@@ -1985,50 +2067,66 @@ smbios_type_0_init(void *start)
p->bios_characteristics_extension_bytes[0] = 0;
p->bios_characteristics_extension_bytes[1] = 0;
- p->system_bios_major_release = 1;
- p->system_bios_minor_release = 0;
+ if (!smbios_load_field(0, offsetof(struct smbios_type_0,
+ system_bios_major_release),
+ &p->system_bios_major_release))
+ p->system_bios_major_release = 1;
+
+ if (!smbios_load_field(0, offsetof(struct smbios_type_0,
+ system_bios_minor_release),
+ &p->system_bios_minor_release))
+ p->system_bios_minor_release = 0;
+
p->embedded_controller_major_release = 0xff;
p->embedded_controller_minor_release = 0xff;
- start += sizeof(struct smbios_type_0);
- memcpy((char *)start, BX_APPNAME, sizeof(BX_APPNAME));
- start += sizeof(BX_APPNAME);
- memcpy((char *)start, RELEASE_DATE_STR, sizeof(RELEASE_DATE_STR));
- start += sizeof(RELEASE_DATE_STR);
- *((uint8_t *)start) = 0;
+ *end = 0;
+ end++;
- return start+1;
+ return end;
}
/* Type 1 -- System Information */
static void *
-smbios_type_1_init(void *start)
+smbios_init_type_1(void *start)
{
struct smbios_type_1 *p = (struct smbios_type_1 *)start;
+ char *end = (char *)start + sizeof(struct smbios_type_1);
+ size_t size;
+ int str_index = 0;
+
p->header.type = 1;
p->header.length = sizeof(struct smbios_type_1);
p->header.handle = 0x100;
- p->manufacturer_str = 0;
- p->product_name_str = 0;
- p->version_str = 0;
- p->serial_number_str = 0;
+ load_str_field_or_skip(1, manufacturer_str);
+ load_str_field_or_skip(1, product_name_str);
+ load_str_field_or_skip(1, version_str);
+ load_str_field_or_skip(1, serial_number_str);
- memcpy(p->uuid, bios_uuid, 16);
+ size = smbios_load_field(1, offsetof(struct smbios_type_1,
+ uuid), &p->uuid);
+ if (size == 0)
+ memset(p->uuid, 0, 16);
p->wake_up_type = 0x06; /* power switch */
- p->sku_number_str = 0;
- p->family_str = 0;
- start += sizeof(struct smbios_type_1);
- *((uint16_t *)start) = 0;
+ load_str_field_or_skip(1, sku_number_str);
+ load_str_field_or_skip(1, family_str);
- return start+2;
+ *end = 0;
+ end++;
+ if (!str_index) {
+ *end = 0;
+ end++;
+ }
+
+ return end;
}
/* Type 3 -- System Enclosure */
static void *
-smbios_type_3_init(void *start)
+smbios_init_type_3(void *start)
{
struct smbios_type_3 *p = (struct smbios_type_3 *)start;
@@ -2058,7 +2156,7 @@ smbios_type_3_init(void *start)
/* Type 4 -- Processor Information */
static void *
-smbios_type_4_init(void *start, unsigned int cpu_number)
+smbios_init_type_4(void *start, unsigned int cpu_number)
{
struct smbios_type_4 *p = (struct smbios_type_4 *)start;
@@ -2098,7 +2196,7 @@ smbios_type_4_init(void *start, unsigned int cpu_number)
/* Type 16 -- Physical Memory Array */
static void *
-smbios_type_16_init(void *start, uint32_t memsize, int nr_mem_devs)
+smbios_init_type_16(void *start, uint32_t memsize, int nr_mem_devs)
{
struct smbios_type_16 *p = (struct smbios_type_16*)start;
@@ -2121,7 +2219,7 @@ smbios_type_16_init(void *start, uint32_t memsize, int nr_mem_devs)
/* Type 17 -- Memory Device */
static void *
-smbios_type_17_init(void *start, uint32_t memory_size_mb, int instance)
+smbios_init_type_17(void *start, uint32_t memory_size_mb, int instance)
{
struct smbios_type_17 *p = (struct smbios_type_17 *)start;
@@ -2151,7 +2249,7 @@ smbios_type_17_init(void *start, uint32_t memory_size_mb, int instance)
/* Type 19 -- Memory Array Mapped Address */
static void *
-smbios_type_19_init(void *start, uint32_t memory_size_mb, int instance)
+smbios_init_type_19(void *start, uint32_t memory_size_mb, int instance)
{
struct smbios_type_19 *p = (struct smbios_type_19 *)start;
@@ -2172,7 +2270,7 @@ smbios_type_19_init(void *start, uint32_t memory_size_mb, int instance)
/* Type 20 -- Memory Device Mapped Address */
static void *
-smbios_type_20_init(void *start, uint32_t memory_size_mb, int instance)
+smbios_init_type_20(void *start, uint32_t memory_size_mb, int instance)
{
struct smbios_type_20 *p = (struct smbios_type_20 *)start;
@@ -2196,7 +2294,7 @@ smbios_type_20_init(void *start, uint32_t memory_size_mb, int instance)
/* Type 32 -- System Boot Information */
static void *
-smbios_type_32_init(void *start)
+smbios_init_type_32(void *start)
{
struct smbios_type_32 *p = (struct smbios_type_32 *)start;
@@ -2214,7 +2312,7 @@ smbios_type_32_init(void *start)
/* Type 127 -- End of Table */
static void *
-smbios_type_127_init(void *start)
+smbios_init_type_127(void *start)
{
struct smbios_type_127 *p = (struct smbios_type_127 *)start;
@@ -2228,6 +2326,78 @@ smbios_type_127_init(void *start)
return start + 2;
}
+static int
+smbios_load_external(int type, char **p, unsigned *nr_structs,
+ unsigned *max_struct_size)
+{
+#ifdef BX_QEMU
+ static uint64_t used_bitmap[4] = { 0 };
+ char *start = *p;
+ int i;
+
+ /* Check if we've already reported these tables */
+ if (used_bitmap[(type >> 6) & 0x3] & (1ULL << (type & 0x3f)))
+ return 1;
+
+ /* Don't introduce spurious end markers */
+ if (type == 127)
+ return 0;
+
+ for (i = smbios_entries(); i > 0; i--) {
+ struct smbios_table table;
+ struct smbios_structure_header *header = (void *)*p;
+ int string;
+
+ qemu_cfg_read((uint8_t *)&table, sizeof(struct smbios_header));
+ table.header.length -= sizeof(struct smbios_header);
+
+ if (table.header.type != SMBIOS_TABLE_ENTRY) {
+ while (table.header.length--)
+ inb(QEMU_CFG_DATA_PORT);
+ continue;
+ }
+
+ qemu_cfg_read((uint8_t *)*p, sizeof(struct smbios_structure_header));
+ table.header.length -= sizeof(struct smbios_structure_header);
+
+ if (header->type != type) {
+ while (table.header.length--)
+ inb(QEMU_CFG_DATA_PORT);
+ continue;
+ }
+
+ *p += sizeof(struct smbios_structure_header);
+
+ /* Entries end with a double NULL char, if there's a string at
+ * the end (length is greater than formatted length), the string
+ * terminator provides the first NULL. */
+ string = header->length < table.header.length +
+ sizeof(struct smbios_structure_header);
+
+ /* Read the rest and terminate the entry */
+ qemu_cfg_read((uint8_t *)*p, table.header.length);
+ *p += table.header.length;
+ *((uint8_t*)*p) = 0;
+ (*p)++;
+ if (!string) {
+ *((uint8_t*)*p) = 0;
+ (*p)++;
+ }
+
+ (*nr_structs)++;
+ if (*p - (char *)header > *max_struct_size)
+ *max_struct_size = *p - (char *)header;
+ }
+
+ /* Mark that we've reported on this type */
+ used_bitmap[(type >> 6) & 0x3] |= (1ULL << (type & 0x3f));
+
+ return (start != *p);
+#else /* !BX_QEMU */
+ return 0;
+#endif
+}
+
void smbios_init(void)
{
unsigned cpu_num, nr_structs = 0, max_struct_size = 0;
@@ -2246,34 +2416,39 @@ void smbios_init(void)
p = (char *)start + sizeof(struct smbios_entry_point);
-#define add_struct(fn) do{ \
- q = (fn); \
- nr_structs++; \
- if ((q - p) > max_struct_size) \
- max_struct_size = q - p; \
- p = q; \
-}while (0)
-
- add_struct(smbios_type_0_init(p));
- add_struct(smbios_type_1_init(p));
- add_struct(smbios_type_3_init(p));
+#define add_struct(type, args...) do { \
+ if (!smbios_load_external(type, &p, &nr_structs, &max_struct_size)) { \
+ q = smbios_init_type_##type(args); \
+ nr_structs++; \
+ if ((q - p) > max_struct_size) \
+ max_struct_size = q - p; \
+ p = q; \
+ } \
+} while (0)
+
+ add_struct(0, p);
+ add_struct(1, p);
+ add_struct(3, p);
for (cpu_num = 1; cpu_num <= smp_cpus; cpu_num++)
- add_struct(smbios_type_4_init(p, cpu_num));
+ add_struct(4, p, cpu_num);
/* Each 'memory device' covers up to 16GB of address space. */
nr_mem_devs = (memsize + 0x3fff) >> 14;
- add_struct(smbios_type_16_init(p, memsize, nr_mem_devs));
+ add_struct(16, p, memsize, nr_mem_devs);
for ( i = 0; i < nr_mem_devs; i++ )
{
uint32_t dev_memsize = ((i == (nr_mem_devs - 1))
? (((memsize-1) & 0x3fff)+1) : 0x4000);
- add_struct(smbios_type_17_init(p, dev_memsize, i));
- add_struct(smbios_type_19_init(p, dev_memsize, i));
- add_struct(smbios_type_20_init(p, dev_memsize, i));
+ add_struct(17, p, dev_memsize, i);
+ add_struct(19, p, dev_memsize, i);
+ add_struct(20, p, dev_memsize, i);
}
- add_struct(smbios_type_32_init(p));
- add_struct(smbios_type_127_init(p));
+ add_struct(32, p);
+ /* Add any remaining provided entries before the end marker */
+ for (i = 0; i < 256; i++)
+ smbios_load_external(i, &p, &nr_structs, &max_struct_size);
+ add_struct(127, p);
#undef add_struct
@@ -2380,8 +2555,6 @@ void rombios32_init(uint32_t *s3_resume_vector, uint8_t *shutdown_flag)
mptable_init();
- uuid_probe();
-
smbios_init();
if (acpi_enabled)
--
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