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smbios: support getting address from EFI

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On some systems (e.g. Lenovo ThinkPad X240, Apple MacBookPro12,1)
the SMBIOS entry point is not found in the <0xFFFFF space.

Follow the SMBIOS spec and use the EFI Configuration Table for
locating the entry point on EFI systems.

Reviewed by:	rpokala, dab
MFC after:	1 week
Sponsored by:	Dell EMC Isilon
Differential Revision:	https://reviews.freebsd.org/D29276
This commit is contained in:
Greg V 2021-04-07 14:46:29 -05:00 committed by Eric van Gyzen
parent 13d4f96130
commit a29bff7a52
6 changed files with 25 additions and 11 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
sys/amd64/conf/MINIMAL
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@ -103,7 +103,6 @@ device cpufreq
# Bus support.
device acpi
device smbios
options IOMMU
device pci

2
sys/amd64/conf/NOTES
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@ -513,7 +513,7 @@ device xenpci # Xen HVM Hypervisor services driver
#
# ipmi: Intelligent Platform Management Interface
# pbio: Parallel (8255 PPI) basic I/O (mode 0) port (e.g. Advantech PCL-724)
# smbios: DMI/SMBIOS entry point
# smbios: DMI/SMBIOS entry point (requires EFIRT option)
# vpd: Vital Product Data kernel interface
# asmc: Apple System Management Controller
# si: Specialix International SI/XIO or SX intelligent serial card

1
sys/amd64/include/efi.h
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@ -47,6 +47,7 @@
#ifdef _KERNEL
#include <isa/rtc.h>
#define ARCH_MAY_USE_EFI
#define EFI_TIME_LOCK() mtx_lock(&atrtc_time_lock)
#define EFI_TIME_UNLOCK() mtx_unlock(&atrtc_time_lock)

2
sys/arm64/include/efi.h
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@ -36,6 +36,8 @@
#define EFIABI_ATTR
#ifdef _KERNEL
#define ARCH_MAY_USE_EFI
#define EFI_TIME_LOCK()
#define EFI_TIME_UNLOCK()
#define EFI_TIME_OWNED()

22
sys/dev/smbios/smbios.c
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@ -34,6 +34,7 @@ __FBSDID("$FreeBSD$");
#include <sys/kernel.h>
#include <sys/malloc.h>
#include <sys/socket.h>
#include <sys/efi.h>
#include <sys/module.h>
#include <sys/bus.h>
@ -79,20 +80,28 @@ static int smbios_cksum (struct smbios_eps *);
static void
smbios_identify (driver_t *driver, device_t parent)
{
#ifdef ARCH_MAY_USE_EFI
struct uuid efi_smbios = EFI_TABLE_SMBIOS;
void *addr_efi;
#endif
struct smbios_eps *eps;
device_t child;
vm_paddr_t addr;
vm_paddr_t addr = 0;
int length;
int rid;
if (!device_is_alive(parent))
return;
#ifdef ARCH_MAY_USE_EFI
if (!efi_get_table(&efi_smbios, &addr_efi))
addr = (vm_paddr_t)addr_efi;
#endif
#if defined(__amd64__) || defined(__i386__)
addr = bios_sigsearch(SMBIOS_START, SMBIOS_SIG, SMBIOS_LEN,
SMBIOS_STEP, SMBIOS_OFF);
#else
addr = 0;
if (addr == 0)
addr = bios_sigsearch(SMBIOS_START, SMBIOS_SIG, SMBIOS_LEN,
SMBIOS_STEP, SMBIOS_OFF);
#endif
if (addr != 0) {
@ -242,6 +251,9 @@ static driver_t smbios_driver = {
};
DRIVER_MODULE(smbios, nexus, smbios_driver, smbios_devclass, smbios_modevent, 0);
#ifdef ARCH_MAY_USE_EFI
MODULE_DEPEND(smbios, efirt, 1, 1, 1);
#endif
MODULE_VERSION(smbios, 1);
static int

8
sys/sys/efi.h
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@ -36,10 +36,10 @@
#define EFI_PAGE_SIZE (1 << EFI_PAGE_SHIFT)
#define EFI_PAGE_MASK (EFI_PAGE_SIZE - 1)
#define EFI_TABLE_ACPI20 \
{0x8868e871,0xe4f1,0x11d3,0xbc,0x22,{0x00,0x80,0xc7,0x3c,0x88,0x81}}
#define EFI_TABLE_SAL \
{0xeb9d2d32,0x2d88,0x11d3,0x9a,0x16,{0x00,0x90,0x27,0x3f,0xc1,0x4d}}
#define EFI_TABLE_SMBIOS \
{0xeb9d2d31,0x2d88,0x11d3,0x9a,0x16,{0x00,0x90,0x27,0x3f,0xc1,0x4d}}
#define EFI_TABLE_SMBIOS3 \
{0xf2fd1544,0x9794,0x4a2c,0x99,0x2e,{0xe5,0xbb,0xcf,0x20,0xe3,0x94}}
enum efi_reset {
EFI_RESET_COLD = 0,