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Code Issues Releases Activity

Support SMBIOS v3 for 64-bit entry systems

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Summary:
Under QEMU on arm64 systems, the smbios table is above 4GB
requiring a 64-bit address to access.

Reviewers: manu

Subscribers: imp, bcran, dab

Differential Revision: https://reviews.freebsd.org/D38721
This commit is contained in:
John-Mark Gurney 2023-02-22 02:27:37 +00:00
parent 19850ee073
commit ee97f198b4
2 changed files with 48 additions and 9 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
stand/efi/loader/main.c
View File

@ -1187,7 +1187,8 @@ main(int argc, CHAR16 *argv[])
#if !defined(__arm__)
for (k = 0; k < ST->NumberOfTableEntries; k++) {
guid = &ST->ConfigurationTable[k].VendorGuid;
if (!memcmp(guid, &smbios, sizeof(EFI_GUID))) {
if (!memcmp(guid, &smbios, sizeof(EFI_GUID)) ||
!memcmp(guid, &smbios3, sizeof(EFI_GUID))) {
char buf[40];
snprintf(buf, sizeof(buf), "%p",

54
stand/libsa/smbios.c
View File

@ -32,6 +32,11 @@ __FBSDID("$FreeBSD$");
#define PTOV(x) ptov(x)
/* Only enable 64-bit entry point if it makes sense */
#if __SIZEOF_POINTER__ > 4
#define HAS_SMBV3 1
#endif
/*
* Detect SMBIOS and export information about the SMBIOS into the
* environment.
@ -53,11 +58,13 @@ __FBSDID("$FreeBSD$");
#define SMBIOS_LENGTH 0x10000
#define SMBIOS_STEP 0x10
#define SMBIOS_SIG "_SM_"
#define SMBIOS3_SIG "_SM3_"
#define SMBIOS_DMI_SIG "_DMI_"
#define SMBIOS_GET8(base, off) (*(uint8_t *)((base) + (off)))
#define SMBIOS_GET16(base, off) (*(uint16_t *)((base) + (off)))
#define SMBIOS_GET32(base, off) (*(uint32_t *)((base) + (off)))
#define SMBIOS_GET64(base, off) (*(uint64_t *)((base) + (off)))
#define SMBIOS_GETLEN(base) SMBIOS_GET8(base, 0x01)
#define SMBIOS_GETSTR(base) ((base) + SMBIOS_GETLEN(base))
@ -80,6 +87,9 @@ struct smbios_attr {
};
static struct smbios_attr smbios;
#ifdef HAS_SMBV3
static int isv3;
#endif
static uint8_t
smbios_checksum(const caddr_t addr, const uint8_t len)
@ -98,12 +108,23 @@ smbios_sigsearch(const caddr_t addr, const uint32_t len)
caddr_t cp;
/* Search on 16-byte boundaries. */
for (cp = addr; cp < addr + len; cp += SMBIOS_STEP)
if (strncmp(cp, SMBIOS_SIG, 4) == 0 &&
for (cp = addr; cp < addr + len; cp += SMBIOS_STEP) {
/* v2.1, 32-bit Entry point */
if (strncmp(cp, SMBIOS_SIG, sizeof(SMBIOS_SIG) - 1) == 0 &&
smbios_checksum(cp, SMBIOS_GET8(cp, 0x05)) == 0 &&
strncmp(cp + 0x10, SMBIOS_DMI_SIG, 5) == 0 &&
smbios_checksum(cp + 0x10, 0x0f) == 0)
return (cp);
#ifdef HAS_SMBV3
/* v3.0, 64-bit Entry point */
if (strncmp(cp, SMBIOS3_SIG, sizeof(SMBIOS3_SIG) - 1) == 0 &&
smbios_checksum(cp, SMBIOS_GET8(cp, 0x06)) == 0) {
isv3 = 1;
return (cp);
}
#endif
}
return (NULL);
}
@ -450,6 +471,8 @@ smbios_probe(const caddr_t addr)
{
caddr_t saddr, info;
uintptr_t paddr;
int maj_off;
int min_off;
if (smbios.probed)
return;
@ -461,10 +484,25 @@ smbios_probe(const caddr_t addr)
if (saddr == NULL)
return;
smbios.length = SMBIOS_GET16(saddr, 0x16); /* Structure Table Length */
paddr = SMBIOS_GET32(saddr, 0x18); /* Structure Table Address */
smbios.count = SMBIOS_GET16(saddr, 0x1c); /* No of SMBIOS Structures */
smbios.ver = SMBIOS_GET8(saddr, 0x1e); /* SMBIOS BCD Revision */
#ifdef HAS_SMBV3
if (isv3) {
smbios.length = SMBIOS_GET16(saddr, 0x0c); /* Structure Table Length */
paddr = SMBIOS_GET64(saddr, 0x10); /* Structure Table Address */
smbios.count = -1; /* not present in V3 */
smbios.ver = 0; /* not present in V3 */
maj_off = 0x07;
min_off = 0x08;
} else
#endif
{
smbios.length = SMBIOS_GET16(saddr, 0x16); /* Structure Table Length */
paddr = SMBIOS_GET32(saddr, 0x18); /* Structure Table Address */
smbios.count = SMBIOS_GET16(saddr, 0x1c); /* No of SMBIOS Structures */
smbios.ver = SMBIOS_GET8(saddr, 0x1e); /* SMBIOS BCD Revision */
maj_off = 0x06;
min_off = 0x07;
}
if (smbios.ver != 0) {
smbios.major = smbios.ver >> 4;
@ -473,8 +511,8 @@ smbios_probe(const caddr_t addr)
smbios.ver = 0;
}
if (smbios.ver == 0) {
smbios.major = SMBIOS_GET8(saddr, 0x06);/* SMBIOS Major Version */
smbios.minor = SMBIOS_GET8(saddr, 0x07);/* SMBIOS Minor Version */
smbios.major = SMBIOS_GET8(saddr, maj_off);/* SMBIOS Major Version */
smbios.minor = SMBIOS_GET8(saddr, min_off);/* SMBIOS Minor Version */
}
smbios.ver = (smbios.major << 8) | smbios.minor;
smbios.addr = PTOV(paddr);