diff options
Diffstat (limited to 'hw/i386/smbios.c')
| -rw-r--r-- | hw/i386/smbios.c | 27 |
1 files changed, 24 insertions, 3 deletions
diff --git a/hw/i386/smbios.c b/hw/i386/smbios.c index 0ae5960b8c..8a7ad48921 100644 --- a/hw/i386/smbios.c +++ b/hw/i386/smbios.c @@ -48,6 +48,7 @@ struct smbios_table { static uint8_t *smbios_entries; static size_t smbios_entries_len; static bool smbios_legacy = true; +static bool smbios_uuid_encoded = true; /* end: legacy structures & constants for <= 2.0 machines */ @@ -391,6 +392,11 @@ static void smbios_build_type_1_fields(void) smbios_maybe_add_str(1, offsetof(struct smbios_type_1, family_str), 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); } @@ -523,6 +529,19 @@ static void smbios_build_type_0_table(void) SMBIOS_BUILD_TABLE_POST; } +/* Encode UUID from the big endian encoding described on RFC4122 to the wire + * format specified by SMBIOS version 2.6. + */ +static void smbios_encode_uuid(struct smbios_uuid *uuid, const uint8_t *buf) +{ + memcpy(uuid, buf, 16); + if (smbios_uuid_encoded) { + uuid->time_low = bswap32(uuid->time_low); + uuid->time_mid = bswap16(uuid->time_mid); + uuid->time_hi_and_version = bswap16(uuid->time_hi_and_version); + } +} + static void smbios_build_type_1_table(void) { SMBIOS_BUILD_TABLE_PRE(1, 0x100, true); /* required */ @@ -532,9 +551,9 @@ static void smbios_build_type_1_table(void) SMBIOS_TABLE_SET_STR(1, version_str, type1.version); SMBIOS_TABLE_SET_STR(1, serial_number_str, type1.serial); if (qemu_uuid_set) { - memcpy(t->uuid, qemu_uuid, 16); + smbios_encode_uuid(&t->uuid, qemu_uuid); } else { - memset(t->uuid, 0, 16); + memset(&t->uuid, 0, 16); } t->wake_up_type = 0x06; /* power switch */ SMBIOS_TABLE_SET_STR(1, sku_number_str, type1.sku); @@ -746,10 +765,12 @@ void smbios_set_cpuid(uint32_t version, uint32_t features) } void smbios_set_defaults(const char *manufacturer, const char *product, - const char *version, bool legacy_mode) + const char *version, bool legacy_mode, + bool uuid_encoded) { smbios_have_defaults = true; smbios_legacy = legacy_mode; + smbios_uuid_encoded = uuid_encoded; /* drop unwanted version of command-line file blob(s) */ if (smbios_legacy) { |