From 6d0fd536183034953bf84826fecb37e47779d24b Mon Sep 17 00:00:00 2001 From: Atish Patra Date: Fri, 28 Aug 2020 10:20:31 -0700 Subject: include: pe.h: Add RISC-V related PE definition Define RISC-V related machine types. Signed-off-by: Atish Patra Reviewed-by: Palmer Dabbelt Link: https://lore.kernel.org/r/20200415195422.19866-3-atish.patra@wdc.com Signed-off-by: Ard Biesheuvel --- include/linux/pe.h | 3 +++ 1 file changed, 3 insertions(+) (limited to 'include/linux') diff --git a/include/linux/pe.h b/include/linux/pe.h index 8ad71d763a77..daf09ffffe38 100644 --- a/include/linux/pe.h +++ b/include/linux/pe.h @@ -55,6 +55,9 @@ #define IMAGE_FILE_MACHINE_POWERPC 0x01f0 #define IMAGE_FILE_MACHINE_POWERPCFP 0x01f1 #define IMAGE_FILE_MACHINE_R4000 0x0166 +#define IMAGE_FILE_MACHINE_RISCV32 0x5032 +#define IMAGE_FILE_MACHINE_RISCV64 0x5064 +#define IMAGE_FILE_MACHINE_RISCV128 0x5128 #define IMAGE_FILE_MACHINE_SH3 0x01a2 #define IMAGE_FILE_MACHINE_SH3DSP 0x01a3 #define IMAGE_FILE_MACHINE_SH3E 0x01a4 -- cgit v1.2.3 From 58c909022a5a56cd1d9e89c8c5461fd1f6a27bb5 Mon Sep 17 00:00:00 2001 From: Lenny Szubowicz Date: Fri, 4 Sep 2020 21:31:05 -0400 Subject: efi: Support for MOK variable config table Because of system-specific EFI firmware limitations, EFI volatile variables may not be capable of holding the required contents of the Machine Owner Key (MOK) certificate store when the certificate list grows above some size. Therefore, an EFI boot loader may pass the MOK certs via a EFI configuration table created specifically for this purpose to avoid this firmware limitation. An EFI configuration table is a much more primitive mechanism compared to EFI variables and is well suited for one-way passage of static information from a pre-OS environment to the kernel. This patch adds initial kernel support to recognize, parse, and validate the EFI MOK configuration table, where named entries contain the same data that would otherwise be provided in similarly named EFI variables. Additionally, this patch creates a sysfs binary file for each EFI MOK configuration table entry found. These files are read-only to root and are provided for use by user space utilities such as mokutil. A subsequent patch will load MOK certs into the trusted platform key ring using this infrastructure. Signed-off-by: Lenny Szubowicz Link: https://lore.kernel.org/r/20200905013107.10457-2-lszubowi@redhat.com Signed-off-by: Ard Biesheuvel --- arch/x86/kernel/setup.c | 1 + arch/x86/platform/efi/efi.c | 3 + drivers/firmware/efi/Makefile | 1 + drivers/firmware/efi/efi-init.c | 1 + drivers/firmware/efi/efi.c | 6 + drivers/firmware/efi/mokvar-table.c | 360 ++++++++++++++++++++++++++++++++++++ include/linux/efi.h | 34 ++++ 7 files changed, 406 insertions(+) create mode 100644 drivers/firmware/efi/mokvar-table.c (limited to 'include/linux') diff --git a/arch/x86/kernel/setup.c b/arch/x86/kernel/setup.c index 3511736fbc74..d41be0df72f8 100644 --- a/arch/x86/kernel/setup.c +++ b/arch/x86/kernel/setup.c @@ -1077,6 +1077,7 @@ void __init setup_arch(char **cmdline_p) efi_fake_memmap(); efi_find_mirror(); efi_esrt_init(); + efi_mokvar_table_init(); /* * The EFI specification says that boot service code won't be diff --git a/arch/x86/platform/efi/efi.c b/arch/x86/platform/efi/efi.c index f6ea8f1a9d57..6961bedc6503 100644 --- a/arch/x86/platform/efi/efi.c +++ b/arch/x86/platform/efi/efi.c @@ -91,6 +91,9 @@ static const unsigned long * const efi_tables[] = { &efi.tpm_log, &efi.tpm_final_log, &efi_rng_seed, +#ifdef CONFIG_LOAD_UEFI_KEYS + &efi.mokvar_table, +#endif }; u64 efi_setup; /* efi setup_data physical address */ diff --git a/drivers/firmware/efi/Makefile b/drivers/firmware/efi/Makefile index 61fd1e8b26fb..e8da782280b6 100644 --- a/drivers/firmware/efi/Makefile +++ b/drivers/firmware/efi/Makefile @@ -28,6 +28,7 @@ obj-$(CONFIG_EFI_DEV_PATH_PARSER) += dev-path-parser.o obj-$(CONFIG_APPLE_PROPERTIES) += apple-properties.o obj-$(CONFIG_EFI_RCI2_TABLE) += rci2-table.o obj-$(CONFIG_EFI_EMBEDDED_FIRMWARE) += embedded-firmware.o +obj-$(CONFIG_LOAD_UEFI_KEYS) += mokvar-table.o fake_map-y += fake_mem.o fake_map-$(CONFIG_X86) += x86_fake_mem.o diff --git a/drivers/firmware/efi/efi-init.c b/drivers/firmware/efi/efi-init.c index 71c445d20258..f55a92ff12c0 100644 --- a/drivers/firmware/efi/efi-init.c +++ b/drivers/firmware/efi/efi-init.c @@ -236,6 +236,7 @@ void __init efi_init(void) reserve_regions(); efi_esrt_init(); + efi_mokvar_table_init(); memblock_reserve(data.phys_map & PAGE_MASK, PAGE_ALIGN(data.size + (data.phys_map & ~PAGE_MASK))); diff --git a/drivers/firmware/efi/efi.c b/drivers/firmware/efi/efi.c index fdd1db025dbf..820f5b1dfba3 100644 --- a/drivers/firmware/efi/efi.c +++ b/drivers/firmware/efi/efi.c @@ -43,6 +43,9 @@ struct efi __read_mostly efi = { .esrt = EFI_INVALID_TABLE_ADDR, .tpm_log = EFI_INVALID_TABLE_ADDR, .tpm_final_log = EFI_INVALID_TABLE_ADDR, +#ifdef CONFIG_LOAD_UEFI_KEYS + .mokvar_table = EFI_INVALID_TABLE_ADDR, +#endif }; EXPORT_SYMBOL(efi); @@ -516,6 +519,9 @@ static const efi_config_table_type_t common_tables[] __initconst = { {EFI_RT_PROPERTIES_TABLE_GUID, &rt_prop, "RTPROP" }, #ifdef CONFIG_EFI_RCI2_TABLE {DELLEMC_EFI_RCI2_TABLE_GUID, &rci2_table_phys }, +#endif +#ifdef CONFIG_LOAD_UEFI_KEYS + {LINUX_EFI_MOK_VARIABLE_TABLE_GUID, &efi.mokvar_table, "MOKvar" }, #endif {}, }; diff --git a/drivers/firmware/efi/mokvar-table.c b/drivers/firmware/efi/mokvar-table.c new file mode 100644 index 000000000000..b1cd49893d4d --- /dev/null +++ b/drivers/firmware/efi/mokvar-table.c @@ -0,0 +1,360 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * mokvar-table.c + * + * Copyright (c) 2020 Red Hat + * Author: Lenny Szubowicz + * + * This module contains the kernel support for the Linux EFI Machine + * Owner Key (MOK) variable configuration table, which is identified by + * the LINUX_EFI_MOK_VARIABLE_TABLE_GUID. + * + * This EFI configuration table provides a more robust alternative to + * EFI volatile variables by which an EFI boot loader can pass the + * contents of the Machine Owner Key (MOK) certificate stores to the + * kernel during boot. If both the EFI MOK config table and corresponding + * EFI MOK variables are present, the table should be considered as + * more authoritative. + * + * This module includes code that validates and maps the EFI MOK table, + * if it's presence was detected very early in boot. + * + * Kernel interface routines are provided to walk through all the + * entries in the MOK config table or to search for a specific named + * entry. + * + * The contents of the individual named MOK config table entries are + * made available to user space via read-only sysfs binary files under: + * + * /sys/firmware/efi/mok-variables/ + * + */ +#define pr_fmt(fmt) "mokvar: " fmt + +#include +#include +#include +#include +#include +#include +#include +#include + +/* + * The LINUX_EFI_MOK_VARIABLE_TABLE_GUID config table is a packed + * sequence of struct efi_mokvar_table_entry, one for each named + * MOK variable. The sequence is terminated by an entry with a + * completely NULL name and 0 data size. + * + * efi_mokvar_table_size is set to the computed size of the + * MOK config table by efi_mokvar_table_init(). This will be + * non-zero if and only if the table if present and has been + * validated by efi_mokvar_table_init(). + */ +static size_t efi_mokvar_table_size; + +/* + * efi_mokvar_table_va is the kernel virtual address at which the + * EFI MOK config table has been mapped by efi_mokvar_sysfs_init(). + */ +static struct efi_mokvar_table_entry *efi_mokvar_table_va; + +/* + * Each /sys/firmware/efi/mok-variables/ sysfs file is represented by + * an instance of struct efi_mokvar_sysfs_attr on efi_mokvar_sysfs_list. + * bin_attr.private points to the associated EFI MOK config table entry. + * + * This list is created during boot and then remains unchanged. + * So no synchronization is currently required to walk the list. + */ +struct efi_mokvar_sysfs_attr { + struct bin_attribute bin_attr; + struct list_head node; +}; + +static LIST_HEAD(efi_mokvar_sysfs_list); +static struct kobject *mokvar_kobj; + +/* + * efi_mokvar_table_init() - Early boot validation of EFI MOK config table + * + * If present, validate and compute the size of the EFI MOK variable + * configuration table. This table may be provided by an EFI boot loader + * as an alternative to ordinary EFI variables, due to platform-dependent + * limitations. The memory occupied by this table is marked as reserved. + * + * This routine must be called before efi_free_boot_services() in order + * to guarantee that it can mark the table as reserved. + * + * Implicit inputs: + * efi.mokvar_table: Physical address of EFI MOK variable config table + * or special value that indicates no such table. + * + * Implicit outputs: + * efi_mokvar_table_size: Computed size of EFI MOK variable config table. + * The table is considered present and valid if this + * is non-zero. + */ +void __init efi_mokvar_table_init(void) +{ + efi_memory_desc_t md; + u64 end_pa; + void *va = NULL; + size_t cur_offset = 0; + size_t offset_limit; + size_t map_size = 0; + size_t map_size_needed = 0; + size_t size; + struct efi_mokvar_table_entry *mokvar_entry; + int err = -EINVAL; + + if (!efi_enabled(EFI_MEMMAP)) + return; + + if (efi.mokvar_table == EFI_INVALID_TABLE_ADDR) + return; + /* + * The EFI MOK config table must fit within a single EFI memory + * descriptor range. + */ + err = efi_mem_desc_lookup(efi.mokvar_table, &md); + if (err) { + pr_warn("EFI MOKvar config table is not within the EFI memory map\n"); + return; + } + end_pa = efi_mem_desc_end(&md); + if (efi.mokvar_table >= end_pa) { + pr_err("EFI memory descriptor containing MOKvar config table is invalid\n"); + return; + } + offset_limit = end_pa - efi.mokvar_table; + /* + * Validate the MOK config table. Since there is no table header + * from which we could get the total size of the MOK config table, + * we compute the total size as we validate each variably sized + * entry, remapping as necessary. + */ + while (cur_offset + sizeof(*mokvar_entry) <= offset_limit) { + mokvar_entry = va + cur_offset; + map_size_needed = cur_offset + sizeof(*mokvar_entry); + if (map_size_needed > map_size) { + if (va) + early_memunmap(va, map_size); + /* + * Map a little more than the fixed size entry + * header, anticipating some data. It's safe to + * do so as long as we stay within current memory + * descriptor. + */ + map_size = min(map_size_needed + 2*EFI_PAGE_SIZE, + offset_limit); + va = early_memremap(efi.mokvar_table, map_size); + if (!va) { + pr_err("Failed to map EFI MOKvar config table pa=0x%lx, size=%zu.\n", + efi.mokvar_table, map_size); + return; + } + mokvar_entry = va + cur_offset; + } + + /* Check for last sentinel entry */ + if (mokvar_entry->name[0] == '\0') { + if (mokvar_entry->data_size != 0) + break; + err = 0; + break; + } + + /* Sanity check that the name is null terminated */ + size = strnlen(mokvar_entry->name, + sizeof(mokvar_entry->name)); + if (size >= sizeof(mokvar_entry->name)) + break; + + /* Advance to the next entry */ + cur_offset = map_size_needed + mokvar_entry->data_size; + } + + if (va) + early_memunmap(va, map_size); + if (err) { + pr_err("EFI MOKvar config table is not valid\n"); + return; + } + efi_mem_reserve(efi.mokvar_table, map_size_needed); + efi_mokvar_table_size = map_size_needed; +} + +/* + * efi_mokvar_entry_next() - Get next entry in the EFI MOK config table + * + * mokvar_entry: Pointer to current EFI MOK config table entry + * or null. Null indicates get first entry. + * Passed by reference. This is updated to the + * same value as the return value. + * + * Returns: Pointer to next EFI MOK config table entry + * or null, if there are no more entries. + * Same value is returned in the mokvar_entry + * parameter. + * + * This routine depends on the EFI MOK config table being entirely + * mapped with it's starting virtual address in efi_mokvar_table_va. + */ +struct efi_mokvar_table_entry *efi_mokvar_entry_next( + struct efi_mokvar_table_entry **mokvar_entry) +{ + struct efi_mokvar_table_entry *mokvar_cur; + struct efi_mokvar_table_entry *mokvar_next; + size_t size_cur; + + mokvar_cur = *mokvar_entry; + *mokvar_entry = NULL; + + if (efi_mokvar_table_va == NULL) + return NULL; + + if (mokvar_cur == NULL) { + mokvar_next = efi_mokvar_table_va; + } else { + if (mokvar_cur->name[0] == '\0') + return NULL; + size_cur = sizeof(*mokvar_cur) + mokvar_cur->data_size; + mokvar_next = (void *)mokvar_cur + size_cur; + } + + if (mokvar_next->name[0] == '\0') + return NULL; + + *mokvar_entry = mokvar_next; + return mokvar_next; +} + +/* + * efi_mokvar_entry_find() - Find EFI MOK config entry by name + * + * name: Name of the entry to look for. + * + * Returns: Pointer to EFI MOK config table entry if found; + * null otherwise. + * + * This routine depends on the EFI MOK config table being entirely + * mapped with it's starting virtual address in efi_mokvar_table_va. + */ +struct efi_mokvar_table_entry *efi_mokvar_entry_find(const char *name) +{ + struct efi_mokvar_table_entry *mokvar_entry = NULL; + + while (efi_mokvar_entry_next(&mokvar_entry)) { + if (!strncmp(name, mokvar_entry->name, + sizeof(mokvar_entry->name))) + return mokvar_entry; + } + return NULL; +} + +/* + * efi_mokvar_sysfs_read() - sysfs binary file read routine + * + * Returns: Count of bytes read. + * + * Copy EFI MOK config table entry data for this mokvar sysfs binary file + * to the supplied buffer, starting at the specified offset into mokvar table + * entry data, for the specified count bytes. The copy is limited by the + * amount of data in this mokvar config table entry. + */ +static ssize_t efi_mokvar_sysfs_read(struct file *file, struct kobject *kobj, + struct bin_attribute *bin_attr, char *buf, + loff_t off, size_t count) +{ + struct efi_mokvar_table_entry *mokvar_entry = bin_attr->private; + + if (!capable(CAP_SYS_ADMIN)) + return 0; + + if (off >= mokvar_entry->data_size) + return 0; + if (count > mokvar_entry->data_size - off) + count = mokvar_entry->data_size - off; + + memcpy(buf, mokvar_entry->data + off, count); + return count; +} + +/* + * efi_mokvar_sysfs_init() - Map EFI MOK config table and create sysfs + * + * Map the EFI MOK variable config table for run-time use by the kernel + * and create the sysfs entries in /sys/firmware/efi/mok-variables/ + * + * This routine just returns if a valid EFI MOK variable config table + * was not found earlier during boot. + * + * This routine must be called during a "middle" initcall phase, i.e. + * after efi_mokvar_table_init() but before UEFI certs are loaded + * during late init. + * + * Implicit inputs: + * efi.mokvar_table: Physical address of EFI MOK variable config table + * or special value that indicates no such table. + * + * efi_mokvar_table_size: Computed size of EFI MOK variable config table. + * The table is considered present and valid if this + * is non-zero. + * + * Implicit outputs: + * efi_mokvar_table_va: Start virtual address of the EFI MOK config table. + */ +static int __init efi_mokvar_sysfs_init(void) +{ + void *config_va; + struct efi_mokvar_table_entry *mokvar_entry = NULL; + struct efi_mokvar_sysfs_attr *mokvar_sysfs = NULL; + int err = 0; + + if (efi_mokvar_table_size == 0) + return -ENOENT; + + config_va = memremap(efi.mokvar_table, efi_mokvar_table_size, + MEMREMAP_WB); + if (!config_va) { + pr_err("Failed to map EFI MOKvar config table\n"); + return -ENOMEM; + } + efi_mokvar_table_va = config_va; + + mokvar_kobj = kobject_create_and_add("mok-variables", efi_kobj); + if (!mokvar_kobj) { + pr_err("Failed to create EFI mok-variables sysfs entry\n"); + return -ENOMEM; + } + + while (efi_mokvar_entry_next(&mokvar_entry)) { + mokvar_sysfs = kzalloc(sizeof(*mokvar_sysfs), GFP_KERNEL); + if (!mokvar_sysfs) { + err = -ENOMEM; + break; + } + + sysfs_bin_attr_init(&mokvar_sysfs->bin_attr); + mokvar_sysfs->bin_attr.private = mokvar_entry; + mokvar_sysfs->bin_attr.attr.name = mokvar_entry->name; + mokvar_sysfs->bin_attr.attr.mode = 0400; + mokvar_sysfs->bin_attr.size = mokvar_entry->data_size; + mokvar_sysfs->bin_attr.read = efi_mokvar_sysfs_read; + + err = sysfs_create_bin_file(mokvar_kobj, + &mokvar_sysfs->bin_attr); + if (err) + break; + + list_add_tail(&mokvar_sysfs->node, &efi_mokvar_sysfs_list); + } + + if (err) { + pr_err("Failed to create some EFI mok-variables sysfs entries\n"); + kfree(mokvar_sysfs); + } + return err; +} +device_initcall(efi_mokvar_sysfs_init); diff --git a/include/linux/efi.h b/include/linux/efi.h index 73db1ae04cef..4a2332f146eb 100644 --- a/include/linux/efi.h +++ b/include/linux/efi.h @@ -357,6 +357,7 @@ 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) #define LINUX_EFI_INITRD_MEDIA_GUID EFI_GUID(0x5568e427, 0x68fc, 0x4f3d, 0xac, 0x74, 0xca, 0x55, 0x52, 0x31, 0xcc, 0x68) +#define LINUX_EFI_MOK_VARIABLE_TABLE_GUID EFI_GUID(0xc451ed2b, 0x9694, 0x45d3, 0xba, 0xba, 0xed, 0x9f, 0x89, 0x88, 0xa3, 0x89) /* OEM GUIDs */ #define DELLEMC_EFI_RCI2_TABLE_GUID EFI_GUID(0x2d9f28a2, 0xa886, 0x456a, 0x97, 0xa8, 0xf1, 0x1e, 0xf2, 0x4f, 0xf4, 0x55) @@ -546,6 +547,7 @@ extern struct efi { unsigned long esrt; /* ESRT table */ unsigned long tpm_log; /* TPM2 Event Log table */ unsigned long tpm_final_log; /* TPM2 Final Events Log table */ + unsigned long mokvar_table; /* MOK variable config table */ efi_get_time_t *get_time; efi_set_time_t *set_time; @@ -1252,4 +1254,36 @@ void __init efi_arch_mem_reserve(phys_addr_t addr, u64 size); char *efi_systab_show_arch(char *str); +/* + * The LINUX_EFI_MOK_VARIABLE_TABLE_GUID config table can be provided + * to the kernel by an EFI boot loader. The table contains a packed + * sequence of these entries, one for each named MOK variable. + * The sequence is terminated by an entry with a completely NULL + * name and 0 data size. + */ +struct efi_mokvar_table_entry { + char name[256]; + u64 data_size; + u8 data[]; +} __attribute((packed)); + +#ifdef CONFIG_LOAD_UEFI_KEYS +extern void __init efi_mokvar_table_init(void); +extern struct efi_mokvar_table_entry *efi_mokvar_entry_next( + struct efi_mokvar_table_entry **mokvar_entry); +extern struct efi_mokvar_table_entry *efi_mokvar_entry_find(const char *name); +#else +static inline void efi_mokvar_table_init(void) { } +static inline struct efi_mokvar_table_entry *efi_mokvar_entry_next( + struct efi_mokvar_table_entry **mokvar_entry) +{ + return NULL; +} +static inline struct efi_mokvar_table_entry *efi_mokvar_entry_find( + const char *name) +{ + return NULL; +} +#endif + #endif /* _LINUX_EFI_H */ -- cgit v1.2.3 From 9baf68cc4544056f33797b78ec09388f54ecc8f0 Mon Sep 17 00:00:00 2001 From: Alex Kluver Date: Wed, 19 Aug 2020 09:35:43 -0500 Subject: edac,ghes,cper: Add Row Extension to Memory Error Record Memory errors could be printed with incorrect row values since the DIMM size has outgrown the 16 bit row field in the CPER structure. UEFI Specification Version 2.8 has increased the size of row by allowing it to use the first 2 bits from a previously reserved space within the structure. When needed, add the extension bits to the row value printed. Based on UEFI 2.8 Table 299. Memory Error Record Signed-off-by: Alex Kluver Tested-by: Russ Anderson Reviewed-by: Steve Wahl Reviewed-by: Kyle Meyer Acked-by: Borislav Petkov Link: https://lore.kernel.org/r/20200819143544.155096-2-alex.kluver@hpe.com Signed-off-by: Ard Biesheuvel --- drivers/edac/ghes_edac.c | 8 ++++++-- drivers/firmware/efi/cper.c | 9 +++++++-- include/linux/cper.h | 16 ++++++++++++++-- 3 files changed, 27 insertions(+), 6 deletions(-) (limited to 'include/linux') diff --git a/drivers/edac/ghes_edac.c b/drivers/edac/ghes_edac.c index da60c29468a7..741e7609e511 100644 --- a/drivers/edac/ghes_edac.c +++ b/drivers/edac/ghes_edac.c @@ -372,8 +372,12 @@ void ghes_edac_report_mem_error(int sev, struct cper_sec_mem_err *mem_err) p += sprintf(p, "rank:%d ", mem_err->rank); if (mem_err->validation_bits & CPER_MEM_VALID_BANK) p += sprintf(p, "bank:%d ", mem_err->bank); - if (mem_err->validation_bits & CPER_MEM_VALID_ROW) - p += sprintf(p, "row:%d ", mem_err->row); + if (mem_err->validation_bits & (CPER_MEM_VALID_ROW | CPER_MEM_VALID_ROW_EXT)) { + u32 row = mem_err->row; + + row |= cper_get_mem_extension(mem_err->validation_bits, mem_err->extended); + p += sprintf(p, "row:%d ", row); + } if (mem_err->validation_bits & CPER_MEM_VALID_COLUMN) p += sprintf(p, "col:%d ", mem_err->column); if (mem_err->validation_bits & CPER_MEM_VALID_BIT_POSITION) diff --git a/drivers/firmware/efi/cper.c b/drivers/firmware/efi/cper.c index f564e15fbc7e..a60acd17bcaa 100644 --- a/drivers/firmware/efi/cper.c +++ b/drivers/firmware/efi/cper.c @@ -234,8 +234,12 @@ static int cper_mem_err_location(struct cper_mem_err_compact *mem, char *msg) n += scnprintf(msg + n, len - n, "bank: %d ", mem->bank); if (mem->validation_bits & CPER_MEM_VALID_DEVICE) n += scnprintf(msg + n, len - n, "device: %d ", mem->device); - if (mem->validation_bits & CPER_MEM_VALID_ROW) - n += scnprintf(msg + n, len - n, "row: %d ", mem->row); + if (mem->validation_bits & (CPER_MEM_VALID_ROW | CPER_MEM_VALID_ROW_EXT)) { + u32 row = mem->row; + + row |= cper_get_mem_extension(mem->validation_bits, mem->extended); + n += scnprintf(msg + n, len - n, "row: %d ", row); + } if (mem->validation_bits & CPER_MEM_VALID_COLUMN) n += scnprintf(msg + n, len - n, "column: %d ", mem->column); if (mem->validation_bits & CPER_MEM_VALID_BIT_POSITION) @@ -292,6 +296,7 @@ void cper_mem_err_pack(const struct cper_sec_mem_err *mem, cmem->requestor_id = mem->requestor_id; cmem->responder_id = mem->responder_id; cmem->target_id = mem->target_id; + cmem->extended = mem->extended; cmem->rank = mem->rank; cmem->mem_array_handle = mem->mem_array_handle; cmem->mem_dev_handle = mem->mem_dev_handle; diff --git a/include/linux/cper.h b/include/linux/cper.h index 8537e9282a65..bd2d8a77a784 100644 --- a/include/linux/cper.h +++ b/include/linux/cper.h @@ -230,6 +230,10 @@ enum { #define CPER_MEM_VALID_RANK_NUMBER 0x8000 #define CPER_MEM_VALID_CARD_HANDLE 0x10000 #define CPER_MEM_VALID_MODULE_HANDLE 0x20000 +#define CPER_MEM_VALID_ROW_EXT 0x40000 + +#define CPER_MEM_EXT_ROW_MASK 0x3 +#define CPER_MEM_EXT_ROW_SHIFT 16 #define CPER_PCIE_VALID_PORT_TYPE 0x0001 #define CPER_PCIE_VALID_VERSION 0x0002 @@ -443,7 +447,7 @@ struct cper_sec_mem_err_old { u8 error_type; }; -/* Memory Error Section (UEFI >= v2.3), UEFI v2.7 sec N.2.5 */ +/* Memory Error Section (UEFI >= v2.3), UEFI v2.8 sec N.2.5 */ struct cper_sec_mem_err { u64 validation_bits; u64 error_status; @@ -461,7 +465,7 @@ struct cper_sec_mem_err { u64 responder_id; u64 target_id; u8 error_type; - u8 reserved; + u8 extended; u16 rank; u16 mem_array_handle; /* "card handle" in UEFI 2.4 */ u16 mem_dev_handle; /* "module handle" in UEFI 2.4 */ @@ -483,8 +487,16 @@ struct cper_mem_err_compact { u16 rank; u16 mem_array_handle; u16 mem_dev_handle; + u8 extended; }; +static inline u32 cper_get_mem_extension(u64 mem_valid, u8 mem_extended) +{ + if (!(mem_valid & CPER_MEM_VALID_ROW_EXT)) + return 0; + return (mem_extended & CPER_MEM_EXT_ROW_MASK) << CPER_MEM_EXT_ROW_SHIFT; +} + /* PCI Express Error Section, UEFI v2.7 sec N.2.7 */ struct cper_sec_pcie { u64 validation_bits; -- cgit v1.2.3 From 612b5d506d066cdf0a739963e7cd28642d500ec1 Mon Sep 17 00:00:00 2001 From: Alex Kluver Date: Wed, 19 Aug 2020 09:35:44 -0500 Subject: cper,edac,efi: Memory Error Record: bank group/address and chip id Updates to the UEFI 2.8 Memory Error Record allow splitting the bank field into bank address and bank group, and using the last 3 bits of the extended field as a chip identifier. When needed, print correct version of bank field, bank group, and chip identification. Based on UEFI 2.8 Table 299. Memory Error Record. Signed-off-by: Alex Kluver Reviewed-by: Russ Anderson Reviewed-by: Kyle Meyer Reviewed-by: Steve Wahl Acked-by: Borislav Petkov Link: https://lore.kernel.org/r/20200819143544.155096-3-alex.kluver@hpe.com Signed-off-by: Ard Biesheuvel --- drivers/edac/ghes_edac.c | 9 +++++++++ drivers/firmware/efi/cper.c | 9 +++++++++ include/linux/cper.h | 8 ++++++++ 3 files changed, 26 insertions(+) (limited to 'include/linux') diff --git a/drivers/edac/ghes_edac.c b/drivers/edac/ghes_edac.c index 741e7609e511..8a44f32db849 100644 --- a/drivers/edac/ghes_edac.c +++ b/drivers/edac/ghes_edac.c @@ -372,6 +372,12 @@ void ghes_edac_report_mem_error(int sev, struct cper_sec_mem_err *mem_err) p += sprintf(p, "rank:%d ", mem_err->rank); if (mem_err->validation_bits & CPER_MEM_VALID_BANK) p += sprintf(p, "bank:%d ", mem_err->bank); + if (mem_err->validation_bits & CPER_MEM_VALID_BANK_GROUP) + p += sprintf(p, "bank_group:%d ", + mem_err->bank >> CPER_MEM_BANK_GROUP_SHIFT); + if (mem_err->validation_bits & CPER_MEM_VALID_BANK_ADDRESS) + p += sprintf(p, "bank_address:%d ", + mem_err->bank & CPER_MEM_BANK_ADDRESS_MASK); if (mem_err->validation_bits & (CPER_MEM_VALID_ROW | CPER_MEM_VALID_ROW_EXT)) { u32 row = mem_err->row; @@ -399,6 +405,9 @@ void ghes_edac_report_mem_error(int sev, struct cper_sec_mem_err *mem_err) strcpy(e->label, dimm->label); } } + if (mem_err->validation_bits & CPER_MEM_VALID_CHIP_ID) + p += sprintf(p, "chipID: %d ", + mem_err->extended >> CPER_MEM_CHIP_ID_SHIFT); if (p > e->location) *(p - 1) = '\0'; diff --git a/drivers/firmware/efi/cper.c b/drivers/firmware/efi/cper.c index a60acd17bcaa..e15d484b6a5a 100644 --- a/drivers/firmware/efi/cper.c +++ b/drivers/firmware/efi/cper.c @@ -232,6 +232,12 @@ static int cper_mem_err_location(struct cper_mem_err_compact *mem, char *msg) n += scnprintf(msg + n, len - n, "rank: %d ", mem->rank); if (mem->validation_bits & CPER_MEM_VALID_BANK) n += scnprintf(msg + n, len - n, "bank: %d ", mem->bank); + if (mem->validation_bits & CPER_MEM_VALID_BANK_GROUP) + n += scnprintf(msg + n, len - n, "bank_group: %d ", + mem->bank >> CPER_MEM_BANK_GROUP_SHIFT); + if (mem->validation_bits & CPER_MEM_VALID_BANK_ADDRESS) + n += scnprintf(msg + n, len - n, "bank_address: %d ", + mem->bank & CPER_MEM_BANK_ADDRESS_MASK); if (mem->validation_bits & CPER_MEM_VALID_DEVICE) n += scnprintf(msg + n, len - n, "device: %d ", mem->device); if (mem->validation_bits & (CPER_MEM_VALID_ROW | CPER_MEM_VALID_ROW_EXT)) { @@ -254,6 +260,9 @@ static int cper_mem_err_location(struct cper_mem_err_compact *mem, char *msg) if (mem->validation_bits & CPER_MEM_VALID_TARGET_ID) scnprintf(msg + n, len - n, "target_id: 0x%016llx ", mem->target_id); + if (mem->validation_bits & CPER_MEM_VALID_CHIP_ID) + scnprintf(msg + n, len - n, "chip_id: %d ", + mem->extended >> CPER_MEM_CHIP_ID_SHIFT); msg[n] = '\0'; return n; diff --git a/include/linux/cper.h b/include/linux/cper.h index bd2d8a77a784..6a511a1078ca 100644 --- a/include/linux/cper.h +++ b/include/linux/cper.h @@ -231,10 +231,18 @@ enum { #define CPER_MEM_VALID_CARD_HANDLE 0x10000 #define CPER_MEM_VALID_MODULE_HANDLE 0x20000 #define CPER_MEM_VALID_ROW_EXT 0x40000 +#define CPER_MEM_VALID_BANK_GROUP 0x80000 +#define CPER_MEM_VALID_BANK_ADDRESS 0x100000 +#define CPER_MEM_VALID_CHIP_ID 0x200000 #define CPER_MEM_EXT_ROW_MASK 0x3 #define CPER_MEM_EXT_ROW_SHIFT 16 +#define CPER_MEM_BANK_ADDRESS_MASK 0xff +#define CPER_MEM_BANK_GROUP_SHIFT 8 + +#define CPER_MEM_CHIP_ID_SHIFT 5 + #define CPER_PCIE_VALID_PORT_TYPE 0x0001 #define CPER_PCIE_VALID_VERSION 0x0002 #define CPER_PCIE_VALID_COMMAND_STATUS 0x0004 -- cgit v1.2.3 From 6277e374b0b07c1a93c829f0a27e38739b3b7a1b Mon Sep 17 00:00:00 2001 From: Ard Biesheuvel Date: Thu, 24 Sep 2020 13:52:24 +0200 Subject: efi: Add definition of EFI_MEMORY_CPU_CRYPTO and ability to report it Incorporate the definition of EFI_MEMORY_CPU_CRYPTO from the UEFI specification v2.8, and wire it into our memory map dumping routine as well. To make a bit of space in the output buffer, which is provided by the various callers, shorten the descriptive names of the memory types. Reviewed-by: Laszlo Ersek Signed-off-by: Ard Biesheuvel --- drivers/firmware/efi/efi.c | 47 +++++++++++++++++++++++----------------------- include/linux/efi.h | 1 + 2 files changed, 25 insertions(+), 23 deletions(-) (limited to 'include/linux') diff --git a/drivers/firmware/efi/efi.c b/drivers/firmware/efi/efi.c index 3aa07c3b5136..ebb59e52294f 100644 --- a/drivers/firmware/efi/efi.c +++ b/drivers/firmware/efi/efi.c @@ -714,7 +714,7 @@ void __init efi_systab_report_header(const efi_table_hdr_t *systab_hdr, vendor); } -static __initdata char memory_type_name[][20] = { +static __initdata char memory_type_name[][13] = { "Reserved", "Loader Code", "Loader Data", @@ -722,14 +722,14 @@ static __initdata char memory_type_name[][20] = { "Boot Data", "Runtime Code", "Runtime Data", - "Conventional Memory", - "Unusable Memory", - "ACPI Reclaim Memory", - "ACPI Memory NVS", - "Memory Mapped I/O", - "MMIO Port Space", + "Conventional", + "Unusable", + "ACPI Reclaim", + "ACPI Mem NVS", + "MMIO", + "MMIO Port", "PAL Code", - "Persistent Memory", + "Persistent", }; char * __init efi_md_typeattr_format(char *buf, size_t size, @@ -756,26 +756,27 @@ char * __init efi_md_typeattr_format(char *buf, size_t size, if (attr & ~(EFI_MEMORY_UC | EFI_MEMORY_WC | EFI_MEMORY_WT | EFI_MEMORY_WB | EFI_MEMORY_UCE | EFI_MEMORY_RO | EFI_MEMORY_WP | EFI_MEMORY_RP | EFI_MEMORY_XP | - EFI_MEMORY_NV | EFI_MEMORY_SP | + EFI_MEMORY_NV | EFI_MEMORY_SP | EFI_MEMORY_CPU_CRYPTO | EFI_MEMORY_RUNTIME | EFI_MEMORY_MORE_RELIABLE)) snprintf(pos, size, "|attr=0x%016llx]", (unsigned long long)attr); else snprintf(pos, size, - "|%3s|%2s|%2s|%2s|%2s|%2s|%2s|%2s|%3s|%2s|%2s|%2s|%2s]", - attr & EFI_MEMORY_RUNTIME ? "RUN" : "", - attr & EFI_MEMORY_MORE_RELIABLE ? "MR" : "", - attr & EFI_MEMORY_SP ? "SP" : "", - attr & EFI_MEMORY_NV ? "NV" : "", - attr & EFI_MEMORY_XP ? "XP" : "", - attr & EFI_MEMORY_RP ? "RP" : "", - attr & EFI_MEMORY_WP ? "WP" : "", - attr & EFI_MEMORY_RO ? "RO" : "", - attr & EFI_MEMORY_UCE ? "UCE" : "", - attr & EFI_MEMORY_WB ? "WB" : "", - attr & EFI_MEMORY_WT ? "WT" : "", - attr & EFI_MEMORY_WC ? "WC" : "", - attr & EFI_MEMORY_UC ? "UC" : ""); + "|%3s|%2s|%2s|%2s|%2s|%2s|%2s|%2s|%2s|%3s|%2s|%2s|%2s|%2s]", + attr & EFI_MEMORY_RUNTIME ? "RUN" : "", + attr & EFI_MEMORY_MORE_RELIABLE ? "MR" : "", + attr & EFI_MEMORY_CPU_CRYPTO ? "CC" : "", + attr & EFI_MEMORY_SP ? "SP" : "", + attr & EFI_MEMORY_NV ? "NV" : "", + attr & EFI_MEMORY_XP ? "XP" : "", + attr & EFI_MEMORY_RP ? "RP" : "", + attr & EFI_MEMORY_WP ? "WP" : "", + attr & EFI_MEMORY_RO ? "RO" : "", + attr & EFI_MEMORY_UCE ? "UCE" : "", + attr & EFI_MEMORY_WB ? "WB" : "", + attr & EFI_MEMORY_WT ? "WT" : "", + attr & EFI_MEMORY_WC ? "WC" : "", + attr & EFI_MEMORY_UC ? "UC" : ""); return buf; } diff --git a/include/linux/efi.h b/include/linux/efi.h index 73db1ae04cef..f216c029a77b 100644 --- a/include/linux/efi.h +++ b/include/linux/efi.h @@ -122,6 +122,7 @@ typedef struct { ((u64)0x0000000000010000ULL) /* higher reliability */ #define EFI_MEMORY_RO ((u64)0x0000000000020000ULL) /* read-only */ #define EFI_MEMORY_SP ((u64)0x0000000000040000ULL) /* soft reserved */ +#define EFI_MEMORY_CPU_CRYPTO ((u64)0x0000000000080000ULL) /* supports encryption */ #define EFI_MEMORY_RUNTIME ((u64)0x8000000000000000ULL) /* range requires runtime mapping */ #define EFI_MEMORY_DESCRIPTOR_VERSION 1 -- cgit v1.2.3 From 232f4eb6393f42f7f9418560ae9228e747fc6faf Mon Sep 17 00:00:00 2001 From: Ard Biesheuvel Date: Wed, 23 Sep 2020 09:56:14 +0200 Subject: efi: pstore: disentangle from deprecated efivars module The EFI pstore implementation relies on the 'efivars' abstraction, which encapsulates the EFI variable store in a way that can be overridden by other backing stores, like the Google SMI one. On top of that, the EFI pstore implementation also relies on the efivars.ko module, which is a separate layer built on top of the 'efivars' abstraction that exposes the [deprecated] sysfs entries for each variable that exists in the backing store. Since the efivars.ko module is deprecated, and all users appear to have moved to the efivarfs file system instead, let's prepare for its removal, by removing EFI pstore's dependency on it. Signed-off-by: Ard Biesheuvel --- drivers/firmware/efi/Kconfig | 2 +- drivers/firmware/efi/efi-pstore.c | 76 ++++++++++++++++++++++++++++++++++++--- drivers/firmware/efi/efivars.c | 41 +-------------------- include/linux/efi.h | 4 --- 4 files changed, 74 insertions(+), 49 deletions(-) (limited to 'include/linux') diff --git a/drivers/firmware/efi/Kconfig b/drivers/firmware/efi/Kconfig index 3939699e62fe..dd8d10817bdf 100644 --- a/drivers/firmware/efi/Kconfig +++ b/drivers/firmware/efi/Kconfig @@ -26,7 +26,7 @@ config EFI_ESRT config EFI_VARS_PSTORE tristate "Register efivars backend for pstore" - depends on EFI_VARS && PSTORE + depends on PSTORE default y help Say Y here to enable use efivars as a backend to pstore. This diff --git a/drivers/firmware/efi/efi-pstore.c b/drivers/firmware/efi/efi-pstore.c index feb7fe6f2da7..785f5e6b3a41 100644 --- a/drivers/firmware/efi/efi-pstore.c +++ b/drivers/firmware/efi/efi-pstore.c @@ -8,6 +8,8 @@ #define DUMP_NAME_LEN 66 +#define EFIVARS_DATA_SIZE_MAX 1024 + static bool efivars_pstore_disable = IS_ENABLED(CONFIG_EFI_VARS_PSTORE_DEFAULT_DISABLE); @@ -18,6 +20,8 @@ module_param_named(pstore_disable, efivars_pstore_disable, bool, 0644); EFI_VARIABLE_BOOTSERVICE_ACCESS | \ EFI_VARIABLE_RUNTIME_ACCESS) +static LIST_HEAD(efi_pstore_list); + static int efi_pstore_open(struct pstore_info *psi) { psi->data = NULL; @@ -126,7 +130,7 @@ static inline int __efi_pstore_scan_sysfs_exit(struct efivar_entry *entry, if (entry->deleting) { list_del(&entry->list); efivar_entry_iter_end(); - efivar_unregister(entry); + kfree(entry); if (efivar_entry_iter_begin()) return -EINTR; } else if (turn_off_scanning) @@ -169,7 +173,7 @@ static int efi_pstore_sysfs_entry_iter(struct pstore_record *record) { struct efivar_entry **pos = (struct efivar_entry **)&record->psi->data; struct efivar_entry *entry, *n; - struct list_head *head = &efivar_sysfs_list; + struct list_head *head = &efi_pstore_list; int size = 0; int ret; @@ -314,12 +318,12 @@ static int efi_pstore_erase_name(const char *name) if (efivar_entry_iter_begin()) return -EINTR; - found = __efivar_entry_iter(efi_pstore_erase_func, &efivar_sysfs_list, + found = __efivar_entry_iter(efi_pstore_erase_func, &efi_pstore_list, efi_name, &entry); efivar_entry_iter_end(); if (found && !entry->scanning) - efivar_unregister(entry); + kfree(entry); return found ? 0 : -ENOENT; } @@ -354,14 +358,76 @@ static struct pstore_info efi_pstore_info = { .erase = efi_pstore_erase, }; +static int efi_pstore_callback(efi_char16_t *name, efi_guid_t vendor, + unsigned long name_size, void *data) +{ + struct efivar_entry *entry; + int ret; + + entry = kzalloc(sizeof(*entry), GFP_KERNEL); + if (!entry) + return -ENOMEM; + + memcpy(entry->var.VariableName, name, name_size); + entry->var.VendorGuid = vendor; + + ret = efivar_entry_add(entry, &efi_pstore_list); + if (ret) + kfree(entry); + + return ret; +} + +static int efi_pstore_update_entry(efi_char16_t *name, efi_guid_t vendor, + unsigned long name_size, void *data) +{ + struct efivar_entry *entry = data; + + if (efivar_entry_find(name, vendor, &efi_pstore_list, false)) + return 0; + + memcpy(entry->var.VariableName, name, name_size); + memcpy(&(entry->var.VendorGuid), &vendor, sizeof(efi_guid_t)); + + return 1; +} + +static void efi_pstore_update_entries(struct work_struct *work) +{ + struct efivar_entry *entry; + int err; + + /* Add new sysfs entries */ + while (1) { + entry = kzalloc(sizeof(*entry), GFP_KERNEL); + if (!entry) + return; + + err = efivar_init(efi_pstore_update_entry, entry, + false, &efi_pstore_list); + if (!err) + break; + + efivar_entry_add(entry, &efi_pstore_list); + } + + kfree(entry); +} + static __init int efivars_pstore_init(void) { + int ret; + if (!efivars_kobject() || !efivar_supports_writes()) return 0; if (efivars_pstore_disable) return 0; + ret = efivar_init(efi_pstore_callback, NULL, true, &efi_pstore_list); + if (ret) + return ret; + efi_pstore_info.buf = kmalloc(4096, GFP_KERNEL); if (!efi_pstore_info.buf) return -ENOMEM; @@ -374,6 +440,8 @@ static __init int efivars_pstore_init(void) efi_pstore_info.bufsize = 0; } + INIT_WORK(&efivar_work, efi_pstore_update_entries); + return 0; } diff --git a/drivers/firmware/efi/efivars.c b/drivers/firmware/efi/efivars.c index dcea137142b3..f39321dbc29f 100644 --- a/drivers/firmware/efi/efivars.c +++ b/drivers/firmware/efi/efivars.c @@ -24,8 +24,7 @@ MODULE_LICENSE("GPL"); MODULE_VERSION(EFIVARS_VERSION); MODULE_ALIAS("platform:efivars"); -LIST_HEAD(efivar_sysfs_list); -EXPORT_SYMBOL_GPL(efivar_sysfs_list); +static LIST_HEAD(efivar_sysfs_list); static struct kset *efivars_kset; @@ -591,42 +590,6 @@ out_free: return error; } -static int efivar_update_sysfs_entry(efi_char16_t *name, efi_guid_t vendor, - unsigned long name_size, void *data) -{ - struct efivar_entry *entry = data; - - if (efivar_entry_find(name, vendor, &efivar_sysfs_list, false)) - return 0; - - memcpy(entry->var.VariableName, name, name_size); - memcpy(&(entry->var.VendorGuid), &vendor, sizeof(efi_guid_t)); - - return 1; -} - -static void efivar_update_sysfs_entries(struct work_struct *work) -{ - struct efivar_entry *entry; - int err; - - /* Add new sysfs entries */ - while (1) { - entry = kzalloc(sizeof(*entry), GFP_KERNEL); - if (!entry) - return; - - err = efivar_init(efivar_update_sysfs_entry, entry, - false, &efivar_sysfs_list); - if (!err) - break; - - efivar_create_sysfs_entry(entry); - } - - kfree(entry); -} - static int efivars_sysfs_callback(efi_char16_t *name, efi_guid_t vendor, unsigned long name_size, void *data) { @@ -701,8 +664,6 @@ int efivars_sysfs_init(void) return error; } - INIT_WORK(&efivar_work, efivar_update_sysfs_entries); - return 0; } EXPORT_SYMBOL_GPL(efivars_sysfs_init); diff --git a/include/linux/efi.h b/include/linux/efi.h index 4a2332f146eb..7066c11ab82f 100644 --- a/include/linux/efi.h +++ b/include/linux/efi.h @@ -986,8 +986,6 @@ struct efivar_entry { bool deleting; }; -extern struct list_head efivar_sysfs_list; - static inline void efivar_unregister(struct efivar_entry *var) { @@ -1045,8 +1043,6 @@ void efivar_run_worker(void); #if defined(CONFIG_EFI_VARS) || defined(CONFIG_EFI_VARS_MODULE) int efivars_sysfs_init(void); -#define EFIVARS_DATA_SIZE_MAX 1024 - #endif /* CONFIG_EFI_VARS */ extern bool efi_capsule_pending(int *reset_type); -- cgit v1.2.3 From c9b51a2dbfe7f47643e133bf48e1bf28f1b85d2a Mon Sep 17 00:00:00 2001 From: Ard Biesheuvel Date: Wed, 23 Sep 2020 10:07:49 +0200 Subject: efi: pstore: move workqueue handling out of efivars The worker thread that gets kicked off to sync the state of the EFI variable list is only used by the EFI pstore implementation, and is defined in its source file. So let's move its scheduling there as well. Since our efivar_init() scan will bail on duplicate entries, there is no need to disable the workqueue like we did before, so we can run it unconditionally. Signed-off-by: Ard Biesheuvel --- drivers/firmware/efi/efi-pstore.c | 7 +++++-- drivers/firmware/efi/vars.c | 21 --------------------- include/linux/efi.h | 3 --- 3 files changed, 5 insertions(+), 26 deletions(-) (limited to 'include/linux') diff --git a/drivers/firmware/efi/efi-pstore.c b/drivers/firmware/efi/efi-pstore.c index 785f5e6b3a41..0ef086e43090 100644 --- a/drivers/firmware/efi/efi-pstore.c +++ b/drivers/firmware/efi/efi-pstore.c @@ -21,6 +21,7 @@ module_param_named(pstore_disable, efivars_pstore_disable, bool, 0644); EFI_VARIABLE_RUNTIME_ACCESS) static LIST_HEAD(efi_pstore_list); +static DECLARE_WORK(efivar_work, NULL); static int efi_pstore_open(struct pstore_info *psi) { @@ -267,8 +268,9 @@ static int efi_pstore_write(struct pstore_record *record) ret = efivar_entry_set_safe(efi_name, vendor, PSTORE_EFI_ATTRIBUTES, preemptible(), record->size, record->psi->buf); - if (record->reason == KMSG_DUMP_OOPS) - efivar_run_worker(); + if (record->reason == KMSG_DUMP_OOPS && try_module_get(THIS_MODULE)) + if (!schedule_work(&efivar_work)) + module_put(THIS_MODULE); return ret; }; @@ -412,6 +414,7 @@ static void efi_pstore_update_entries(struct work_struct *work) } kfree(entry); + module_put(THIS_MODULE); } static __init int efivars_pstore_init(void) diff --git a/drivers/firmware/efi/vars.c b/drivers/firmware/efi/vars.c index 973eef234b36..ffb12f6efc97 100644 --- a/drivers/firmware/efi/vars.c +++ b/drivers/firmware/efi/vars.c @@ -32,10 +32,6 @@ static struct efivars *__efivars; */ static DEFINE_SEMAPHORE(efivars_lock); -static bool efivar_wq_enabled = true; -DECLARE_WORK(efivar_work, NULL); -EXPORT_SYMBOL_GPL(efivar_work); - static bool validate_device_path(efi_char16_t *var_name, int match, u8 *buffer, unsigned long len) @@ -391,13 +387,6 @@ static void dup_variable_bug(efi_char16_t *str16, efi_guid_t *vendor_guid, size_t i, len8 = len16 / sizeof(efi_char16_t); char *str8; - /* - * Disable the workqueue since the algorithm it uses for - * detecting new variables won't work with this buggy - * implementation of GetNextVariableName(). - */ - efivar_wq_enabled = false; - str8 = kzalloc(len8, GFP_KERNEL); if (!str8) return; @@ -1157,16 +1146,6 @@ struct kobject *efivars_kobject(void) } EXPORT_SYMBOL_GPL(efivars_kobject); -/** - * efivar_run_worker - schedule the efivar worker thread - */ -void efivar_run_worker(void) -{ - if (efivar_wq_enabled) - schedule_work(&efivar_work); -} -EXPORT_SYMBOL_GPL(efivar_run_worker); - /** * efivars_register - register an efivars * @efivars: efivars to register diff --git a/include/linux/efi.h b/include/linux/efi.h index 7066c11ab82f..ab8c80331217 100644 --- a/include/linux/efi.h +++ b/include/linux/efi.h @@ -1037,9 +1037,6 @@ bool efivar_validate(efi_guid_t vendor, efi_char16_t *var_name, u8 *data, bool efivar_variable_is_removable(efi_guid_t vendor, const char *name, size_t len); -extern struct work_struct efivar_work; -void efivar_run_worker(void); - #if defined(CONFIG_EFI_VARS) || defined(CONFIG_EFI_VARS_MODULE) int efivars_sysfs_init(void); -- cgit v1.2.3 From 5d3c8617ccee6387ba73a5dba77fb9dc21cb85f4 Mon Sep 17 00:00:00 2001 From: Ard Biesheuvel Date: Wed, 23 Sep 2020 10:13:07 +0200 Subject: efi: efivars: un-export efivars_sysfs_init() efivars_sysfs_init() is only used locally in the source file that defines it, so make it static and unexport it. Signed-off-by: Ard Biesheuvel --- drivers/firmware/efi/efivars.c | 3 +-- include/linux/efi.h | 4 ---- 2 files changed, 1 insertion(+), 6 deletions(-) (limited to 'include/linux') diff --git a/drivers/firmware/efi/efivars.c b/drivers/firmware/efi/efivars.c index f39321dbc29f..a76f50e15e6d 100644 --- a/drivers/firmware/efi/efivars.c +++ b/drivers/firmware/efi/efivars.c @@ -638,7 +638,7 @@ static void efivars_sysfs_exit(void) kset_unregister(efivars_kset); } -int efivars_sysfs_init(void) +static int efivars_sysfs_init(void) { struct kobject *parent_kobj = efivars_kobject(); int error = 0; @@ -666,7 +666,6 @@ int efivars_sysfs_init(void) return 0; } -EXPORT_SYMBOL_GPL(efivars_sysfs_init); module_init(efivars_sysfs_init); module_exit(efivars_sysfs_exit); diff --git a/include/linux/efi.h b/include/linux/efi.h index ab8c80331217..4c8dae0b5c75 100644 --- a/include/linux/efi.h +++ b/include/linux/efi.h @@ -1037,10 +1037,6 @@ bool efivar_validate(efi_guid_t vendor, efi_char16_t *var_name, u8 *data, bool efivar_variable_is_removable(efi_guid_t vendor, const char *name, size_t len); -#if defined(CONFIG_EFI_VARS) || defined(CONFIG_EFI_VARS_MODULE) -int efivars_sysfs_init(void); - -#endif /* CONFIG_EFI_VARS */ extern bool efi_capsule_pending(int *reset_type); extern int efi_capsule_supported(efi_guid_t guid, u32 flags, -- cgit v1.2.3