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Merge branch 'efi-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Browse Source 
Pull EFI updates from Ingo Molnar:

 - refactor the EFI config table handling across architectures

 - add support for the Dell EMC OEM config table

 - include AER diagnostic output to CPER handling of fatal PCIe errors

* 'efi-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  efi: cper: print AER info of PCIe fatal error
  efi: Export Runtime Configuration Interface table to sysfs
  efi: ia64: move SAL systab handling out of generic EFI code
  efi/x86: move UV_SYSTAB handling into arch/x86
  efi: x86: move efi_is_table_address() into arch/x86
This commit is contained in:
Linus Torvalds 2019-09-16 16:47:38 -07:00
commit cc9b499a1f
15 changed files with 250 additions and 52 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
Documentation/ABI/testing/sysfs-firmware-efi
View File

@ -28,3 +28,11 @@ Description: Displays the physical addresses of all EFI Configuration
versions are always printed first, i.e. ACPI20 comes
before ACPI.
Users: dmidecode
What: /sys/firmware/efi/tables/rci2
Date: July 2019
Contact: Narendra K <Narendra.K@dell.com>, linux-bugs@dell.com
Description: Displays the content of the Runtime Configuration Interface
Table version 2 on Dell EMC PowerEdge systems in binary format
Users: It is used by Dell EMC OpenManage Server Administrator tool to
populate BIOS setup page.

1
arch/ia64/include/asm/sal.h
View File

@ -43,6 +43,7 @@
#include <asm/pal.h>
#include <asm/fpu.h>
extern unsigned long sal_systab_phys;
extern spinlock_t sal_lock;
/* SAL spec _requires_ eight args for each call. */

3
arch/ia64/kernel/efi.c
View File

@ -47,8 +47,11 @@
static __initdata unsigned long palo_phys;
unsigned long sal_systab_phys = EFI_INVALID_TABLE_ADDR;
static __initdata efi_config_table_type_t arch_tables[] = {
{PROCESSOR_ABSTRACTION_LAYER_OVERWRITE_GUID, "PALO", &palo_phys},
{SAL_SYSTEM_TABLE_GUID, "SALsystab", &sal_systab_phys},
{NULL_GUID, NULL, 0},
};

2
arch/ia64/kernel/setup.c
View File

@ -586,7 +586,7 @@ setup_arch (char **cmdline_p)
find_memory();
/* process SAL system table: */
ia64_sal_init(__va(efi.sal_systab));
ia64_sal_init(__va(sal_systab_phys));
#ifdef CONFIG_ITANIUM
ia64_patch_rse((u64) __start___rse_patchlist, (u64) __end___rse_patchlist);

5
arch/x86/include/asm/efi.h
View File

@ -242,6 +242,7 @@ static inline bool efi_is_64bit(void)
__efi_early()->runtime_services), __VA_ARGS__)
extern bool efi_reboot_required(void);
extern bool efi_is_table_address(unsigned long phys_addr);
#else
static inline void parse_efi_setup(u64 phys_addr, u32 data_len) {}
@ -249,6 +250,10 @@ static inline bool efi_reboot_required(void)
{
return false;
}
static inline bool efi_is_table_address(unsigned long phys_addr)
{
return false;
}
#endif /* CONFIG_EFI */
#endif /* _ASM_X86_EFI_H */

4
arch/x86/include/asm/uv/uv.h
View File

@ -12,10 +12,12 @@ struct mm_struct;
#ifdef CONFIG_X86_UV
#include <linux/efi.h>
extern unsigned long uv_systab_phys;
extern enum uv_system_type get_uv_system_type(void);
static inline bool is_early_uv_system(void)
{
return !((efi.uv_systab == EFI_INVALID_TABLE_ADDR) || !efi.uv_systab);
return uv_systab_phys && uv_systab_phys != EFI_INVALID_TABLE_ADDR;
}
extern int is_uv_system(void);
extern int is_uv_hubless(void);

1
arch/x86/mm/ioremap.c
View File

@ -19,6 +19,7 @@
#include <asm/set_memory.h>
#include <asm/e820/api.h>
#include <asm/efi.h>
#include <asm/fixmap.h>
#include <asm/pgtable.h>
#include <asm/tlbflush.h>

39
arch/x86/platform/efi/efi.c
View File

@ -59,11 +59,34 @@ static efi_system_table_t efi_systab __initdata;
static efi_config_table_type_t arch_tables[] __initdata = {
#ifdef CONFIG_X86_UV
{UV_SYSTEM_TABLE_GUID, "UVsystab", &efi.uv_systab},
{UV_SYSTEM_TABLE_GUID, "UVsystab", &uv_systab_phys},
#endif
{NULL_GUID, NULL, NULL},
};
static const unsigned long * const efi_tables[] = {
&efi.mps,
&efi.acpi,
&efi.acpi20,
&efi.smbios,
&efi.smbios3,
&efi.boot_info,
&efi.hcdp,
&efi.uga,
#ifdef CONFIG_X86_UV
&uv_systab_phys,
#endif
&efi.fw_vendor,
&efi.runtime,
&efi.config_table,
&efi.esrt,
&efi.properties_table,
&efi.mem_attr_table,
#ifdef CONFIG_EFI_RCI2_TABLE
&rci2_table_phys,
#endif
};
u64 efi_setup; /* efi setup_data physical address */
static int add_efi_memmap __initdata;
@ -1049,3 +1072,17 @@ static int __init arch_parse_efi_cmdline(char *str)
return 0;
}
early_param("efi", arch_parse_efi_cmdline);
bool efi_is_table_address(unsigned long phys_addr)
{
unsigned int i;
if (phys_addr == EFI_INVALID_TABLE_ADDR)
return false;
for (i = 0; i < ARRAY_SIZE(efi_tables); i++)
if (*(efi_tables[i]) == phys_addr)
return true;
return false;
}

10
arch/x86/platform/uv/bios_uv.c
View File

@ -14,6 +14,8 @@
#include <asm/uv/bios.h>
#include <asm/uv/uv_hub.h>
unsigned long uv_systab_phys __ro_after_init = EFI_INVALID_TABLE_ADDR;
struct uv_systab *uv_systab;
static s64 __uv_bios_call(enum uv_bios_cmd which, u64 a1, u64 a2, u64 a3,
@ -185,13 +187,13 @@ EXPORT_SYMBOL_GPL(uv_bios_set_legacy_vga_target);
void uv_bios_init(void)
{
uv_systab = NULL;
if ((efi.uv_systab == EFI_INVALID_TABLE_ADDR) ||
!efi.uv_systab || efi_runtime_disabled()) {
if ((uv_systab_phys == EFI_INVALID_TABLE_ADDR) ||
!uv_systab_phys || efi_runtime_disabled()) {
pr_crit("UV: UVsystab: missing\n");
return;
}
uv_systab = ioremap(efi.uv_systab, sizeof(struct uv_systab));
uv_systab = ioremap(uv_systab_phys, sizeof(struct uv_systab));
if (!uv_systab || strncmp(uv_systab->signature, UV_SYSTAB_SIG, 4)) {
pr_err("UV: UVsystab: bad signature!\n");
iounmap(uv_systab);
@ -203,7 +205,7 @@ void uv_bios_init(void)
int size = uv_systab->size;
iounmap(uv_systab);
uv_systab = ioremap(efi.uv_systab, size);
uv_systab = ioremap(uv_systab_phys, size);
if (!uv_systab) {
pr_err("UV: UVsystab: ioremap(%d) failed!\n", size);
return;

13
drivers/firmware/efi/Kconfig
View File

@ -180,6 +180,19 @@ config RESET_ATTACK_MITIGATION
have been evicted, since otherwise it will trigger even on clean
reboots.
config EFI_RCI2_TABLE
bool "EFI Runtime Configuration Interface Table Version 2 Support"
help
Displays the content of the Runtime Configuration Interface
Table version 2 on Dell EMC PowerEdge systems as a binary
attribute 'rci2' under /sys/firmware/efi/tables directory.
RCI2 table contains BIOS HII in XML format and is used to populate
BIOS setup page in Dell EMC OpenManage Server Administrator tool.
The BIOS setup page contains BIOS tokens which can be configured.
Say Y here for Dell EMC PowerEdge systems.
endmenu
config UEFI_CPER

1
drivers/firmware/efi/Makefile
View File

@ -25,6 +25,7 @@ obj-$(CONFIG_EFI_BOOTLOADER_CONTROL) += efibc.o
obj-$(CONFIG_EFI_TEST) += test/
obj-$(CONFIG_EFI_DEV_PATH_PARSER) += dev-path-parser.o
obj-$(CONFIG_APPLE_PROPERTIES) += apple-properties.o
obj-$(CONFIG_EFI_RCI2_TABLE) += rci2-table.o
arm-obj-$(CONFIG_EFI) := arm-init.o arm-runtime.o
obj-$(CONFIG_ARM) += $(arm-obj-y)

15
drivers/firmware/efi/cper.c
View File

@ -390,6 +390,21 @@ static void cper_print_pcie(const char *pfx, const struct cper_sec_pcie *pcie,
printk(
"%s""bridge: secondary_status: 0x%04x, control: 0x%04x\n",
pfx, pcie->bridge.secondary_status, pcie->bridge.control);
/* Fatal errors call __ghes_panic() before AER handler prints this */
if ((pcie->validation_bits & CPER_PCIE_VALID_AER_INFO) &&
(gdata->error_severity & CPER_SEV_FATAL)) {
struct aer_capability_regs *aer;
aer = (struct aer_capability_regs *)pcie->aer_info;
printk("%saer_uncor_status: 0x%08x, aer_uncor_mask: 0x%08x\n",
pfx, aer->uncor_status, aer->uncor_mask);
printk("%saer_uncor_severity: 0x%08x\n",
pfx, aer->uncor_severity);
printk("%sTLP Header: %08x %08x %08x %08x\n", pfx,
aer->header_log.dw0, aer->header_log.dw1,
aer->header_log.dw2, aer->header_log.dw3);
}
}
static void cper_print_tstamp(const char *pfx,

39
drivers/firmware/efi/efi.c
View File

@ -39,11 +39,9 @@ struct efi __read_mostly efi = {
.acpi20 = EFI_INVALID_TABLE_ADDR,
.smbios = EFI_INVALID_TABLE_ADDR,
.smbios3 = EFI_INVALID_TABLE_ADDR,
.sal_systab = EFI_INVALID_TABLE_ADDR,
.boot_info = EFI_INVALID_TABLE_ADDR,
.hcdp = EFI_INVALID_TABLE_ADDR,
.uga = EFI_INVALID_TABLE_ADDR,
.uv_systab = EFI_INVALID_TABLE_ADDR,
.fw_vendor = EFI_INVALID_TABLE_ADDR,
.runtime = EFI_INVALID_TABLE_ADDR,
.config_table = EFI_INVALID_TABLE_ADDR,
@ -57,25 +55,6 @@ struct efi __read_mostly efi = {
};
EXPORT_SYMBOL(efi);
static unsigned long *efi_tables[] = {
&efi.mps,
&efi.acpi,
&efi.acpi20,
&efi.smbios,
&efi.smbios3,
&efi.sal_systab,
&efi.boot_info,
&efi.hcdp,
&efi.uga,
&efi.uv_systab,
&efi.fw_vendor,
&efi.runtime,
&efi.config_table,
&efi.esrt,
&efi.properties_table,
&efi.mem_attr_table,
};
struct mm_struct efi_mm = {
.mm_rb = RB_ROOT,
.mm_users = ATOMIC_INIT(2),
@ -476,7 +455,6 @@ static __initdata efi_config_table_type_t common_tables[] = {
{ACPI_TABLE_GUID, "ACPI", &efi.acpi},
{HCDP_TABLE_GUID, "HCDP", &efi.hcdp},
{MPS_TABLE_GUID, "MPS", &efi.mps},
{SAL_SYSTEM_TABLE_GUID, "SALsystab", &efi.sal_systab},
{SMBIOS_TABLE_GUID, "SMBIOS", &efi.smbios},
{SMBIOS3_TABLE_GUID, "SMBIOS 3.0", &efi.smbios3},
{UGA_IO_PROTOCOL_GUID, "UGA", &efi.uga},
@ -487,6 +465,9 @@ static __initdata efi_config_table_type_t common_tables[] = {
{LINUX_EFI_TPM_EVENT_LOG_GUID, "TPMEventLog", &efi.tpm_log},
{LINUX_EFI_TPM_FINAL_LOG_GUID, "TPMFinalLog", &efi.tpm_final_log},
{LINUX_EFI_MEMRESERVE_TABLE_GUID, "MEMRESERVE", &efi.mem_reserve},
#ifdef CONFIG_EFI_RCI2_TABLE
{DELLEMC_EFI_RCI2_TABLE_GUID, NULL, &rci2_table_phys},
#endif
{NULL_GUID, NULL, NULL},
};
@ -964,20 +945,6 @@ int efi_status_to_err(efi_status_t status)
return err;
}
bool efi_is_table_address(unsigned long phys_addr)
{
unsigned int i;
if (phys_addr == EFI_INVALID_TABLE_ADDR)
return false;
for (i = 0; i < ARRAY_SIZE(efi_tables); i++)
if (*(efi_tables[i]) == phys_addr)
return true;
return false;
}
static DEFINE_SPINLOCK(efi_mem_reserve_persistent_lock);
static struct linux_efi_memreserve *efi_memreserve_root __ro_after_init;

147
drivers/firmware/efi/rci2-table.c Normal file
View File

@ -0,0 +1,147 @@
// SPDX-License-Identifier: GPL-2.0
/*
* Export Runtime Configuration Interface Table Version 2 (RCI2)
* to sysfs
*
* Copyright (C) 2019 Dell Inc
* by Narendra K <Narendra.K@dell.com>
*
* System firmware advertises the address of the RCI2 Table via
* an EFI Configuration Table entry. This code retrieves the RCI2
* table from the address and exports it to sysfs as a binary
* attribute 'rci2' under /sys/firmware/efi/tables directory.
*/
#include <linux/kobject.h>
#include <linux/device.h>
#include <linux/sysfs.h>
#include <linux/efi.h>
#include <linux/types.h>
#include <linux/io.h>
#define RCI_SIGNATURE "_RC_"
struct rci2_table_global_hdr {
u16 type;
u16 resvd0;
u16 hdr_len;
u8 rci2_sig[4];
u16 resvd1;
u32 resvd2;
u32 resvd3;
u8 major_rev;
u8 minor_rev;
u16 num_of_structs;
u32 rci2_len;
u16 rci2_chksum;
} __packed;
static u8 *rci2_base;
static u32 rci2_table_len;
unsigned long rci2_table_phys __ro_after_init = EFI_INVALID_TABLE_ADDR;
static ssize_t raw_table_read(struct file *file, struct kobject *kobj,
struct bin_attribute *attr, char *buf,
loff_t pos, size_t count)
{
memcpy(buf, attr->private + pos, count);
return count;
}
static BIN_ATTR(rci2, S_IRUSR, raw_table_read, NULL, 0);
static u16 checksum(void)
{
u8 len_is_odd = rci2_table_len % 2;
u32 chksum_len = rci2_table_len;
u16 *base = (u16 *)rci2_base;
u8 buf[2] = {0};
u32 offset = 0;
u16 chksum = 0;
if (len_is_odd)
chksum_len -= 1;
while (offset < chksum_len) {
chksum += *base;
offset += 2;
base++;
}
if (len_is_odd) {
buf[0] = *(u8 *)base;
chksum += *(u16 *)(buf);
}
return chksum;
}
int __init efi_rci2_sysfs_init(void)
{
struct kobject *tables_kobj;
int ret = -ENOMEM;
rci2_base = memremap(rci2_table_phys,
sizeof(struct rci2_table_global_hdr),
MEMREMAP_WB);
if (!rci2_base) {
pr_debug("RCI2 table init failed - could not map RCI2 table\n");
goto err;
}
if (strncmp(rci2_base +
offsetof(struct rci2_table_global_hdr, rci2_sig),
RCI_SIGNATURE, 4)) {
pr_debug("RCI2 table init failed - incorrect signature\n");
ret = -ENODEV;
goto err_unmap;
}
rci2_table_len = *(u32 *)(rci2_base +
offsetof(struct rci2_table_global_hdr,
rci2_len));
memunmap(rci2_base);
if (!rci2_table_len) {
pr_debug("RCI2 table init failed - incorrect table length\n");
goto err;
}
rci2_base = memremap(rci2_table_phys, rci2_table_len, MEMREMAP_WB);
if (!rci2_base) {
pr_debug("RCI2 table - could not map RCI2 table\n");
goto err;
}
if (checksum() != 0) {
pr_debug("RCI2 table - incorrect checksum\n");
ret = -ENODEV;
goto err_unmap;
}
tables_kobj = kobject_create_and_add("tables", efi_kobj);
if (!tables_kobj) {
pr_debug("RCI2 table - tables_kobj creation failed\n");
goto err_unmap;
}
bin_attr_rci2.size = rci2_table_len;
bin_attr_rci2.private = rci2_base;
ret = sysfs_create_bin_file(tables_kobj, &bin_attr_rci2);
if (ret != 0) {
pr_debug("RCI2 table - rci2 sysfs bin file creation failed\n");
kobject_del(tables_kobj);
kobject_put(tables_kobj);
goto err_unmap;
}
return 0;
err_unmap:
memunmap(rci2_base);
err:
pr_debug("RCI2 table - sysfs initialization failed\n");
return ret;
}
late_initcall(efi_rci2_sysfs_init);

14
include/linux/efi.h
View File

@ -692,6 +692,9 @@ void efi_native_runtime_setup(void);
#define LINUX_EFI_TPM_FINAL_LOG_GUID EFI_GUID(0x1e2ed096, 0x30e2, 0x4254, 0xbd, 0x89, 0x86, 0x3b, 0xbe, 0xf8, 0x23, 0x25)
#define LINUX_EFI_MEMRESERVE_TABLE_GUID EFI_GUID(0x888eb0c6, 0x8ede, 0x4ff5, 0xa8, 0xf0, 0x9a, 0xee, 0x5c, 0xb9, 0x77, 0xc2)
/* OEM GUIDs */
#define DELLEMC_EFI_RCI2_TABLE_GUID EFI_GUID(0x2d9f28a2, 0xa886, 0x456a, 0x97, 0xa8, 0xf1, 0x1e, 0xf2, 0x4f, 0xf4, 0x55)
typedef struct {
efi_guid_t guid;
u64 table;
@ -984,11 +987,9 @@ extern struct efi {
unsigned long acpi20; /* ACPI table (ACPI 2.0) */
unsigned long smbios; /* SMBIOS table (32 bit entry point) */
unsigned long smbios3; /* SMBIOS table (64 bit entry point) */
unsigned long sal_systab; /* SAL system table */
unsigned long boot_info; /* boot info table */
unsigned long hcdp; /* HCDP table */
unsigned long uga; /* UGA table */
unsigned long uv_systab; /* UV system table */
unsigned long fw_vendor; /* fw_vendor */
unsigned long runtime; /* runtime table */
unsigned long config_table; /* config tables */
@ -1211,8 +1212,6 @@ static inline bool efi_enabled(int feature)
return test_bit(feature, &efi.flags) != 0;
}
extern void efi_reboot(enum reboot_mode reboot_mode, const char *__unused);
extern bool efi_is_table_address(unsigned long phys_addr);
#else
static inline bool efi_enabled(int feature)
{
@ -1226,11 +1225,6 @@ efi_capsule_pending(int *reset_type)
{
return false;
}
static inline bool efi_is_table_address(unsigned long phys_addr)
{
return false;
}
#endif
extern int efi_status_to_err(efi_status_t status);
@ -1722,6 +1716,8 @@ struct efi_tcg2_final_events_table {
};
extern int efi_tpm_final_log_size;
extern unsigned long rci2_table_phys;
/*
* efi_runtime_service() function identifiers.
* "NONE" is used by efi_recover_from_page_fault() to check if the page