Merge branch 'efi/urgent' into efi/core, to pick up fixes
These fixes missed the v5.9 merge window, pick them up for early v5.10 merge.
Signed-off-by: Ingo Molnar <mingo@kernel.org>
diff --git a/Documentation/arm/uefi.rst b/Documentation/arm/uefi.rst
index f868330..f732f95 100644
--- a/Documentation/arm/uefi.rst
+++ b/Documentation/arm/uefi.rst
@@ -23,7 +23,7 @@
For actually enabling [U]EFI support, enable:
- CONFIG_EFI=y
-- CONFIG_EFI_VARS=y or m
+- CONFIG_EFIVAR_FS=y or m
The implementation depends on receiving information about the UEFI environment
in a Flattened Device Tree (FDT) - so is only available with CONFIG_OF.
diff --git a/arch/arm/include/asm/efi.h b/arch/arm/include/asm/efi.h
index 5dcf3c6..3ee4f43 100644
--- a/arch/arm/include/asm/efi.h
+++ b/arch/arm/include/asm/efi.h
@@ -66,25 +66,24 @@
#define MAX_UNCOMP_KERNEL_SIZE SZ_32M
/*
- * The kernel zImage should preferably be located between 32 MB and 128 MB
- * from the base of DRAM. The min address leaves space for a maximal size
- * uncompressed image, and the max address is due to how the zImage decompressor
- * picks a destination address.
+ * phys-to-virt patching requires that the physical to virtual offset fits
+ * into the immediate field of an add/sub instruction, which comes down to the
+ * 24 least significant bits being zero, and so the offset should be a multiple
+ * of 16 MB. Since PAGE_OFFSET itself is a multiple of 16 MB, the physical
+ * base should be aligned to 16 MB as well.
*/
-#define ZIMAGE_OFFSET_LIMIT SZ_128M
-#define MIN_ZIMAGE_OFFSET MAX_UNCOMP_KERNEL_SIZE
+#define EFI_PHYS_ALIGN SZ_16M
-/* on ARM, the FDT should be located in the first 128 MB of RAM */
-static inline unsigned long efi_get_max_fdt_addr(unsigned long dram_base)
+/* on ARM, the FDT should be located in a lowmem region */
+static inline unsigned long efi_get_max_fdt_addr(unsigned long image_addr)
{
- return dram_base + ZIMAGE_OFFSET_LIMIT;
+ return round_down(image_addr, EFI_PHYS_ALIGN) + SZ_512M;
}
/* on ARM, the initrd should be loaded in a lowmem region */
-static inline unsigned long efi_get_max_initrd_addr(unsigned long dram_base,
- unsigned long image_addr)
+static inline unsigned long efi_get_max_initrd_addr(unsigned long image_addr)
{
- return dram_base + SZ_512M;
+ return round_down(image_addr, EFI_PHYS_ALIGN) + SZ_512M;
}
struct efi_arm_entry_state {
diff --git a/arch/arm64/include/asm/efi.h b/arch/arm64/include/asm/efi.h
index d4ab3f7..973b144 100644
--- a/arch/arm64/include/asm/efi.h
+++ b/arch/arm64/include/asm/efi.h
@@ -65,7 +65,7 @@
(SEGMENT_ALIGN > THREAD_ALIGN ? SEGMENT_ALIGN : THREAD_ALIGN)
/* on arm64, the FDT may be located anywhere in system RAM */
-static inline unsigned long efi_get_max_fdt_addr(unsigned long dram_base)
+static inline unsigned long efi_get_max_fdt_addr(unsigned long image_addr)
{
return ULONG_MAX;
}
@@ -80,8 +80,7 @@
* apply to other bootloaders, and are required for some kernel
* configurations.
*/
-static inline unsigned long efi_get_max_initrd_addr(unsigned long dram_base,
- unsigned long image_addr)
+static inline unsigned long efi_get_max_initrd_addr(unsigned long image_addr)
{
return (image_addr & ~(SZ_1G - 1UL)) + (1UL << (VA_BITS_MIN - 1));
}
diff --git a/arch/x86/kernel/setup.c b/arch/x86/kernel/setup.c
index 3511736..d41be0df 100644
--- a/arch/x86/kernel/setup.c
+++ b/arch/x86/kernel/setup.c
@@ -1077,6 +1077,7 @@
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 d37ebe6..8a26e70 100644
--- a/arch/x86/platform/efi/efi.c
+++ b/arch/x86/platform/efi/efi.c
@@ -90,6 +90,9 @@
&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/edac/ghes_edac.c b/drivers/edac/ghes_edac.c
index da60c29..8a44f32 100644
--- a/drivers/edac/ghes_edac.c
+++ b/drivers/edac/ghes_edac.c
@@ -372,8 +372,18 @@
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_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;
+
+ 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)
@@ -395,6 +405,9 @@
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/Kconfig b/drivers/firmware/efi/Kconfig
index 3939699..da1887f 100644
--- a/drivers/firmware/efi/Kconfig
+++ b/drivers/firmware/efi/Kconfig
@@ -4,20 +4,15 @@
config EFI_VARS
tristate "EFI Variable Support via sysfs"
- depends on EFI
+ depends on EFI && (X86 || IA64)
default n
help
If you say Y here, you are able to get EFI (Extensible Firmware
Interface) variable information via sysfs. You may read,
write, create, and destroy EFI variables through this interface.
-
- Note that using this driver in concert with efibootmgr requires
- at least test release version 0.5.0-test3 or later, which is
- available from:
- <http://linux.dell.com/efibootmgr/testing/efibootmgr-0.5.0-test3.tar.gz>
-
- Subsequent efibootmgr releases may be found at:
- <http://github.com/vathpela/efibootmgr>
+ Note that this driver is only retained for compatibility with
+ legacy users: new users should use the efivarfs filesystem
+ instead.
config EFI_ESRT
bool
@@ -26,7 +21,7 @@
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
@@ -137,7 +132,6 @@
config EFI_BOOTLOADER_CONTROL
tristate "EFI Bootloader Control"
- depends on EFI_VARS
default n
help
This module installs a reboot hook, such that if reboot() is
@@ -281,7 +275,7 @@
config EFI_CUSTOM_SSDT_OVERLAYS
bool "Load custom ACPI SSDT overlay from an EFI variable"
- depends on EFI_VARS && ACPI
+ depends on EFI && ACPI
default ACPI_TABLE_UPGRADE
help
Allow loading of an ACPI SSDT overlay from an EFI variable specified
diff --git a/drivers/firmware/efi/Makefile b/drivers/firmware/efi/Makefile
index 7a21698..e8da782 100644
--- a/drivers/firmware/efi/Makefile
+++ b/drivers/firmware/efi/Makefile
@@ -28,11 +28,12 @@
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-$(CONFIG_X86) += x86_fake_mem.o
-arm-obj-$(CONFIG_EFI) := arm-init.o arm-runtime.o
+arm-obj-$(CONFIG_EFI) := efi-init.o arm-runtime.o
obj-$(CONFIG_ARM) += $(arm-obj-y)
obj-$(CONFIG_ARM64) += $(arm-obj-y)
obj-$(CONFIG_EFI_CAPSULE_LOADER) += capsule-loader.o
diff --git a/drivers/firmware/efi/cper.c b/drivers/firmware/efi/cper.c
index f564e15..e15d484 100644
--- a/drivers/firmware/efi/cper.c
+++ b/drivers/firmware/efi/cper.c
@@ -232,10 +232,20 @@
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)
- 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)
@@ -250,6 +260,9 @@
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;
@@ -292,6 +305,7 @@
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/drivers/firmware/efi/arm-init.c b/drivers/firmware/efi/efi-init.c
similarity index 99%
rename from drivers/firmware/efi/arm-init.c
rename to drivers/firmware/efi/efi-init.c
index 71c445d..f55a92f 100644
--- a/drivers/firmware/efi/arm-init.c
+++ b/drivers/firmware/efi/efi-init.c
@@ -236,6 +236,7 @@
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-pstore.c b/drivers/firmware/efi/efi-pstore.c
index feb7fe6..0ef086e 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 +20,9 @@
EFI_VARIABLE_BOOTSERVICE_ACCESS | \
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)
{
psi->data = NULL;
@@ -126,7 +131,7 @@
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 +174,7 @@
{
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;
@@ -263,8 +268,9 @@
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;
};
@@ -314,12 +320,12 @@
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 +360,77 @@
.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);
+ module_put(THIS_MODULE);
+}
+
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 +443,8 @@
efi_pstore_info.bufsize = 0;
}
+ INIT_WORK(&efivar_work, efi_pstore_update_entries);
+
return 0;
}
diff --git a/drivers/firmware/efi/efi.c b/drivers/firmware/efi/efi.c
index ebb59e5..5e5480a 100644
--- a/drivers/firmware/efi/efi.c
+++ b/drivers/firmware/efi/efi.c
@@ -43,6 +43,9 @@
.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);
@@ -519,6 +522,9 @@
#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/efivars.c b/drivers/firmware/efi/efivars.c
index dcea137..e6b16b3a 100644
--- a/drivers/firmware/efi/efivars.c
+++ b/drivers/firmware/efi/efivars.c
@@ -22,10 +22,8 @@
MODULE_DESCRIPTION("sysfs interface to EFI Variables");
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 +589,6 @@
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)
{
@@ -675,7 +637,7 @@
kset_unregister(efivars_kset);
}
-int efivars_sysfs_init(void)
+static int efivars_sysfs_init(void)
{
struct kobject *parent_kobj = efivars_kobject();
int error = 0;
@@ -701,11 +663,8 @@
return error;
}
- INIT_WORK(&efivar_work, efivar_update_sysfs_entries);
-
return 0;
}
-EXPORT_SYMBOL_GPL(efivars_sysfs_init);
module_init(efivars_sysfs_init);
module_exit(efivars_sysfs_exit);
diff --git a/drivers/firmware/efi/libstub/arm32-stub.c b/drivers/firmware/efi/libstub/arm32-stub.c
index d08e5d5..4b5b240 100644
--- a/drivers/firmware/efi/libstub/arm32-stub.c
+++ b/drivers/firmware/efi/libstub/arm32-stub.c
@@ -113,162 +113,58 @@
efi_bs_call(free_pool, si);
}
-static efi_status_t reserve_kernel_base(unsigned long dram_base,
- unsigned long *reserve_addr,
- unsigned long *reserve_size)
-{
- efi_physical_addr_t alloc_addr;
- efi_memory_desc_t *memory_map;
- unsigned long nr_pages, map_size, desc_size, buff_size;
- efi_status_t status;
- unsigned long l;
-
- struct efi_boot_memmap map = {
- .map = &memory_map,
- .map_size = &map_size,
- .desc_size = &desc_size,
- .desc_ver = NULL,
- .key_ptr = NULL,
- .buff_size = &buff_size,
- };
-
- /*
- * Reserve memory for the uncompressed kernel image. This is
- * all that prevents any future allocations from conflicting
- * with the kernel. Since we can't tell from the compressed
- * image how much DRAM the kernel actually uses (due to BSS
- * size uncertainty) we allocate the maximum possible size.
- * Do this very early, as prints can cause memory allocations
- * that may conflict with this.
- */
- alloc_addr = dram_base + MAX_UNCOMP_KERNEL_SIZE;
- nr_pages = MAX_UNCOMP_KERNEL_SIZE / EFI_PAGE_SIZE;
- status = efi_bs_call(allocate_pages, EFI_ALLOCATE_MAX_ADDRESS,
- EFI_BOOT_SERVICES_DATA, nr_pages, &alloc_addr);
- if (status == EFI_SUCCESS) {
- if (alloc_addr == dram_base) {
- *reserve_addr = alloc_addr;
- *reserve_size = MAX_UNCOMP_KERNEL_SIZE;
- return EFI_SUCCESS;
- }
- /*
- * If we end up here, the allocation succeeded but starts below
- * dram_base. This can only occur if the real base of DRAM is
- * not a multiple of 128 MB, in which case dram_base will have
- * been rounded up. Since this implies that a part of the region
- * was already occupied, we need to fall through to the code
- * below to ensure that the existing allocations don't conflict.
- * For this reason, we use EFI_BOOT_SERVICES_DATA above and not
- * EFI_LOADER_DATA, which we wouldn't able to distinguish from
- * allocations that we want to disallow.
- */
- }
-
- /*
- * If the allocation above failed, we may still be able to proceed:
- * if the only allocations in the region are of types that will be
- * released to the OS after ExitBootServices(), the decompressor can
- * safely overwrite them.
- */
- status = efi_get_memory_map(&map);
- if (status != EFI_SUCCESS) {
- efi_err("reserve_kernel_base(): Unable to retrieve memory map.\n");
- return status;
- }
-
- for (l = 0; l < map_size; l += desc_size) {
- efi_memory_desc_t *desc;
- u64 start, end;
-
- desc = (void *)memory_map + l;
- start = desc->phys_addr;
- end = start + desc->num_pages * EFI_PAGE_SIZE;
-
- /* Skip if entry does not intersect with region */
- if (start >= dram_base + MAX_UNCOMP_KERNEL_SIZE ||
- end <= dram_base)
- continue;
-
- switch (desc->type) {
- case EFI_BOOT_SERVICES_CODE:
- case EFI_BOOT_SERVICES_DATA:
- /* Ignore types that are released to the OS anyway */
- continue;
-
- case EFI_CONVENTIONAL_MEMORY:
- /* Skip soft reserved conventional memory */
- if (efi_soft_reserve_enabled() &&
- (desc->attribute & EFI_MEMORY_SP))
- continue;
-
- /*
- * Reserve the intersection between this entry and the
- * region.
- */
- start = max(start, (u64)dram_base);
- end = min(end, (u64)dram_base + MAX_UNCOMP_KERNEL_SIZE);
-
- status = efi_bs_call(allocate_pages,
- EFI_ALLOCATE_ADDRESS,
- EFI_LOADER_DATA,
- (end - start) / EFI_PAGE_SIZE,
- &start);
- if (status != EFI_SUCCESS) {
- efi_err("reserve_kernel_base(): alloc failed.\n");
- goto out;
- }
- break;
-
- case EFI_LOADER_CODE:
- case EFI_LOADER_DATA:
- /*
- * These regions may be released and reallocated for
- * another purpose (including EFI_RUNTIME_SERVICE_DATA)
- * at any time during the execution of the OS loader,
- * so we cannot consider them as safe.
- */
- default:
- /*
- * Treat any other allocation in the region as unsafe */
- status = EFI_OUT_OF_RESOURCES;
- goto out;
- }
- }
-
- status = EFI_SUCCESS;
-out:
- efi_bs_call(free_pool, memory_map);
- return status;
-}
-
efi_status_t handle_kernel_image(unsigned long *image_addr,
unsigned long *image_size,
unsigned long *reserve_addr,
unsigned long *reserve_size,
- unsigned long dram_base,
efi_loaded_image_t *image)
{
- unsigned long kernel_base;
+ const int slack = TEXT_OFFSET - 5 * PAGE_SIZE;
+ int alloc_size = MAX_UNCOMP_KERNEL_SIZE + EFI_PHYS_ALIGN;
+ unsigned long alloc_base, kernel_base;
efi_status_t status;
- /* use a 16 MiB aligned base for the decompressed kernel */
- kernel_base = round_up(dram_base, SZ_16M) + TEXT_OFFSET;
-
/*
- * Note that some platforms (notably, the Raspberry Pi 2) put
- * spin-tables and other pieces of firmware at the base of RAM,
- * abusing the fact that the window of TEXT_OFFSET bytes at the
- * base of the kernel image is only partially used at the moment.
- * (Up to 5 pages are used for the swapper page tables)
+ * Allocate space for the decompressed kernel as low as possible.
+ * The region should be 16 MiB aligned, but the first 'slack' bytes
+ * are not used by Linux, so we allow those to be occupied by the
+ * firmware.
*/
- status = reserve_kernel_base(kernel_base - 5 * PAGE_SIZE, reserve_addr,
- reserve_size);
+ status = efi_low_alloc_above(alloc_size, EFI_PAGE_SIZE, &alloc_base, 0x0);
if (status != EFI_SUCCESS) {
efi_err("Unable to allocate memory for uncompressed kernel.\n");
return status;
}
- *image_addr = kernel_base;
+ if ((alloc_base % EFI_PHYS_ALIGN) > slack) {
+ /*
+ * More than 'slack' bytes are already occupied at the base of
+ * the allocation, so we need to advance to the next 16 MiB block.
+ */
+ kernel_base = round_up(alloc_base, EFI_PHYS_ALIGN);
+ efi_info("Free memory starts at 0x%lx, setting kernel_base to 0x%lx\n",
+ alloc_base, kernel_base);
+ } else {
+ kernel_base = round_down(alloc_base, EFI_PHYS_ALIGN);
+ }
+
+ *reserve_addr = kernel_base + slack;
+ *reserve_size = MAX_UNCOMP_KERNEL_SIZE;
+
+ /* now free the parts that we will not use */
+ if (*reserve_addr > alloc_base) {
+ efi_bs_call(free_pages, alloc_base,
+ (*reserve_addr - alloc_base) / EFI_PAGE_SIZE);
+ alloc_size -= *reserve_addr - alloc_base;
+ }
+ efi_bs_call(free_pages, *reserve_addr + MAX_UNCOMP_KERNEL_SIZE,
+ (alloc_size - MAX_UNCOMP_KERNEL_SIZE) / EFI_PAGE_SIZE);
+
+ *image_addr = kernel_base + TEXT_OFFSET;
*image_size = 0;
+
+ efi_debug("image addr == 0x%lx, reserve_addr == 0x%lx\n",
+ *image_addr, *reserve_addr);
+
return EFI_SUCCESS;
}
diff --git a/drivers/firmware/efi/libstub/arm64-stub.c b/drivers/firmware/efi/libstub/arm64-stub.c
index 04f5d79..54b3327 100644
--- a/drivers/firmware/efi/libstub/arm64-stub.c
+++ b/drivers/firmware/efi/libstub/arm64-stub.c
@@ -50,7 +50,6 @@
unsigned long *image_size,
unsigned long *reserve_addr,
unsigned long *reserve_size,
- unsigned long dram_base,
efi_loaded_image_t *image)
{
efi_status_t status;
diff --git a/drivers/firmware/efi/libstub/efi-stub-helper.c b/drivers/firmware/efi/libstub/efi-stub-helper.c
index f735db5..aa8da0a 100644
--- a/drivers/firmware/efi/libstub/efi-stub-helper.c
+++ b/drivers/firmware/efi/libstub/efi-stub-helper.c
@@ -239,6 +239,102 @@
}
/*
+ * The EFI_LOAD_OPTION descriptor has the following layout:
+ * u32 Attributes;
+ * u16 FilePathListLength;
+ * u16 Description[];
+ * efi_device_path_protocol_t FilePathList[];
+ * u8 OptionalData[];
+ *
+ * This function validates and unpacks the variable-size data fields.
+ */
+static
+bool efi_load_option_unpack(efi_load_option_unpacked_t *dest,
+ const efi_load_option_t *src, size_t size)
+{
+ const void *pos;
+ u16 c;
+ efi_device_path_protocol_t header;
+ const efi_char16_t *description;
+ const efi_device_path_protocol_t *file_path_list;
+
+ if (size < offsetof(efi_load_option_t, variable_data))
+ return false;
+ pos = src->variable_data;
+ size -= offsetof(efi_load_option_t, variable_data);
+
+ if ((src->attributes & ~EFI_LOAD_OPTION_MASK) != 0)
+ return false;
+
+ /* Scan description. */
+ description = pos;
+ do {
+ if (size < sizeof(c))
+ return false;
+ c = *(const u16 *)pos;
+ pos += sizeof(c);
+ size -= sizeof(c);
+ } while (c != L'\0');
+
+ /* Scan file_path_list. */
+ file_path_list = pos;
+ do {
+ if (size < sizeof(header))
+ return false;
+ header = *(const efi_device_path_protocol_t *)pos;
+ if (header.length < sizeof(header))
+ return false;
+ if (size < header.length)
+ return false;
+ pos += header.length;
+ size -= header.length;
+ } while ((header.type != EFI_DEV_END_PATH && header.type != EFI_DEV_END_PATH2) ||
+ (header.sub_type != EFI_DEV_END_ENTIRE));
+ if (pos != (const void *)file_path_list + src->file_path_list_length)
+ return false;
+
+ dest->attributes = src->attributes;
+ dest->file_path_list_length = src->file_path_list_length;
+ dest->description = description;
+ dest->file_path_list = file_path_list;
+ dest->optional_data_size = size;
+ dest->optional_data = size ? pos : NULL;
+
+ return true;
+}
+
+/*
+ * At least some versions of Dell firmware pass the entire contents of the
+ * Boot#### variable, i.e. the EFI_LOAD_OPTION descriptor, rather than just the
+ * OptionalData field.
+ *
+ * Detect this case and extract OptionalData.
+ */
+void efi_apply_loadoptions_quirk(const void **load_options, int *load_options_size)
+{
+ const efi_load_option_t *load_option = *load_options;
+ efi_load_option_unpacked_t load_option_unpacked;
+
+ if (!IS_ENABLED(CONFIG_X86))
+ return;
+ if (!load_option)
+ return;
+ if (*load_options_size < sizeof(*load_option))
+ return;
+ if ((load_option->attributes & ~EFI_LOAD_OPTION_BOOT_MASK) != 0)
+ return;
+
+ if (!efi_load_option_unpack(&load_option_unpacked, load_option, *load_options_size))
+ return;
+
+ efi_warn_once(FW_BUG "LoadOptions is an EFI_LOAD_OPTION descriptor\n");
+ efi_warn_once(FW_BUG "Using OptionalData as a workaround\n");
+
+ *load_options = load_option_unpacked.optional_data;
+ *load_options_size = load_option_unpacked.optional_data_size;
+}
+
+/*
* Convert the unicode UEFI command line to ASCII to pass to kernel.
* Size of memory allocated return in *cmd_line_len.
* Returns NULL on error.
@@ -247,12 +343,15 @@
{
const u16 *s2;
unsigned long cmdline_addr = 0;
- int options_chars = efi_table_attr(image, load_options_size) / 2;
+ int options_chars = efi_table_attr(image, load_options_size);
const u16 *options = efi_table_attr(image, load_options);
int options_bytes = 0, safe_options_bytes = 0; /* UTF-8 bytes */
bool in_quote = false;
efi_status_t status;
+ efi_apply_loadoptions_quirk((const void **)&options, &options_chars);
+ options_chars /= sizeof(*options);
+
if (options) {
s2 = options;
while (options_bytes < COMMAND_LINE_SIZE && options_chars--) {
diff --git a/drivers/firmware/efi/libstub/efi-stub.c b/drivers/firmware/efi/libstub/efi-stub.c
index a5a405d..311a168 100644
--- a/drivers/firmware/efi/libstub/efi-stub.c
+++ b/drivers/firmware/efi/libstub/efi-stub.c
@@ -87,40 +87,6 @@
efi_err("Failed to install memreserve config table!\n");
}
-static unsigned long get_dram_base(void)
-{
- efi_status_t status;
- unsigned long map_size, buff_size;
- unsigned long membase = EFI_ERROR;
- struct efi_memory_map map;
- efi_memory_desc_t *md;
- struct efi_boot_memmap boot_map;
-
- boot_map.map = (efi_memory_desc_t **)&map.map;
- boot_map.map_size = &map_size;
- boot_map.desc_size = &map.desc_size;
- boot_map.desc_ver = NULL;
- boot_map.key_ptr = NULL;
- boot_map.buff_size = &buff_size;
-
- status = efi_get_memory_map(&boot_map);
- if (status != EFI_SUCCESS)
- return membase;
-
- map.map_end = map.map + map_size;
-
- for_each_efi_memory_desc_in_map(&map, md) {
- if (md->attribute & EFI_MEMORY_WB) {
- if (membase > md->phys_addr)
- membase = md->phys_addr;
- }
- }
-
- efi_bs_call(free_pool, map.map);
-
- return membase;
-}
-
/*
* EFI entry point for the arm/arm64 EFI stubs. This is the entrypoint
* that is described in the PE/COFF header. Most of the code is the same
@@ -134,7 +100,6 @@
efi_status_t status;
unsigned long image_addr;
unsigned long image_size = 0;
- unsigned long dram_base;
/* addr/point and size pairs for memory management*/
unsigned long initrd_addr = 0;
unsigned long initrd_size = 0;
@@ -174,13 +139,6 @@
goto fail;
}
- dram_base = get_dram_base();
- if (dram_base == EFI_ERROR) {
- efi_err("Failed to find DRAM base\n");
- status = EFI_LOAD_ERROR;
- goto fail;
- }
-
/*
* Get the command line from EFI, using the LOADED_IMAGE
* protocol. We are going to copy the command line into the
@@ -218,7 +176,7 @@
status = handle_kernel_image(&image_addr, &image_size,
&reserve_addr,
&reserve_size,
- dram_base, image);
+ image);
if (status != EFI_SUCCESS) {
efi_err("Failed to relocate kernel\n");
goto fail_free_screeninfo;
@@ -262,7 +220,7 @@
efi_info("Generating empty DTB\n");
if (!efi_noinitrd) {
- max_addr = efi_get_max_initrd_addr(dram_base, image_addr);
+ max_addr = efi_get_max_initrd_addr(image_addr);
status = efi_load_initrd(image, &initrd_addr, &initrd_size,
ULONG_MAX, max_addr);
if (status != EFI_SUCCESS)
@@ -306,7 +264,7 @@
install_memreserve_table();
status = allocate_new_fdt_and_exit_boot(handle, &fdt_addr,
- efi_get_max_fdt_addr(dram_base),
+ efi_get_max_fdt_addr(image_addr),
initrd_addr, initrd_size,
cmdline_ptr, fdt_addr, fdt_size);
if (status != EFI_SUCCESS)
diff --git a/drivers/firmware/efi/libstub/efistub.h b/drivers/firmware/efi/libstub/efistub.h
index 85050f5..2d7abcd 100644
--- a/drivers/firmware/efi/libstub/efistub.h
+++ b/drivers/firmware/efi/libstub/efistub.h
@@ -10,9 +10,6 @@
#include <linux/types.h>
#include <asm/efi.h>
-/* error code which can't be mistaken for valid address */
-#define EFI_ERROR (~0UL)
-
/*
* __init annotations should not be used in the EFI stub, since the code is
* either included in the decompressor (x86, ARM) where they have no effect,
@@ -55,11 +52,34 @@
#define efi_info(fmt, ...) \
efi_printk(KERN_INFO fmt, ##__VA_ARGS__)
+#define efi_warn(fmt, ...) \
+ efi_printk(KERN_WARNING "WARNING: " fmt, ##__VA_ARGS__)
#define efi_err(fmt, ...) \
efi_printk(KERN_ERR "ERROR: " fmt, ##__VA_ARGS__)
#define efi_debug(fmt, ...) \
efi_printk(KERN_DEBUG "DEBUG: " fmt, ##__VA_ARGS__)
+#define efi_printk_once(fmt, ...) \
+({ \
+ static bool __print_once; \
+ bool __ret_print_once = !__print_once; \
+ \
+ if (!__print_once) { \
+ __print_once = true; \
+ efi_printk(fmt, ##__VA_ARGS__); \
+ } \
+ __ret_print_once; \
+})
+
+#define efi_info_once(fmt, ...) \
+ efi_printk_once(KERN_INFO fmt, ##__VA_ARGS__)
+#define efi_warn_once(fmt, ...) \
+ efi_printk_once(KERN_WARNING "WARNING: " fmt, ##__VA_ARGS__)
+#define efi_err_once(fmt, ...) \
+ efi_printk_once(KERN_ERR "ERROR: " fmt, ##__VA_ARGS__)
+#define efi_debug_once(fmt, ...) \
+ efi_printk_once(KERN_DEBUG "DEBUG: " fmt, ##__VA_ARGS__)
+
/* Helper macros for the usual case of using simple C variables: */
#ifndef fdt_setprop_inplace_var
#define fdt_setprop_inplace_var(fdt, node_offset, name, var) \
@@ -688,6 +708,35 @@
} mixed_mode;
};
+typedef struct {
+ u32 attributes;
+ u16 file_path_list_length;
+ u8 variable_data[];
+ // efi_char16_t description[];
+ // efi_device_path_protocol_t file_path_list[];
+ // u8 optional_data[];
+} __packed efi_load_option_t;
+
+#define EFI_LOAD_OPTION_ACTIVE 0x0001U
+#define EFI_LOAD_OPTION_FORCE_RECONNECT 0x0002U
+#define EFI_LOAD_OPTION_HIDDEN 0x0008U
+#define EFI_LOAD_OPTION_CATEGORY 0x1f00U
+#define EFI_LOAD_OPTION_CATEGORY_BOOT 0x0000U
+#define EFI_LOAD_OPTION_CATEGORY_APP 0x0100U
+
+#define EFI_LOAD_OPTION_BOOT_MASK \
+ (EFI_LOAD_OPTION_ACTIVE|EFI_LOAD_OPTION_HIDDEN|EFI_LOAD_OPTION_CATEGORY)
+#define EFI_LOAD_OPTION_MASK (EFI_LOAD_OPTION_FORCE_RECONNECT|EFI_LOAD_OPTION_BOOT_MASK)
+
+typedef struct {
+ u32 attributes;
+ u16 file_path_list_length;
+ const efi_char16_t *description;
+ const efi_device_path_protocol_t *file_path_list;
+ size_t optional_data_size;
+ const void *optional_data;
+} efi_load_option_unpacked_t;
+
void efi_pci_disable_bridge_busmaster(void);
typedef efi_status_t (*efi_exit_boot_map_processing)(
@@ -730,6 +779,8 @@
void efi_free(unsigned long size, unsigned long addr);
+void efi_apply_loadoptions_quirk(const void **load_options, int *load_options_size);
+
char *efi_convert_cmdline(efi_loaded_image_t *image, int *cmd_line_len);
efi_status_t efi_get_memory_map(struct efi_boot_memmap *map);
@@ -740,6 +791,9 @@
efi_status_t efi_allocate_pages_aligned(unsigned long size, unsigned long *addr,
unsigned long max, unsigned long align);
+efi_status_t efi_low_alloc_above(unsigned long size, unsigned long align,
+ unsigned long *addr, unsigned long min);
+
efi_status_t efi_relocate_kernel(unsigned long *image_addr,
unsigned long image_size,
unsigned long alloc_size,
@@ -786,7 +840,6 @@
unsigned long *image_size,
unsigned long *reserve_addr,
unsigned long *reserve_size,
- unsigned long dram_base,
efi_loaded_image_t *image);
asmlinkage void __noreturn efi_enter_kernel(unsigned long entrypoint,
diff --git a/drivers/firmware/efi/libstub/file.c b/drivers/firmware/efi/libstub/file.c
index 630caa6..4e81c60 100644
--- a/drivers/firmware/efi/libstub/file.c
+++ b/drivers/firmware/efi/libstub/file.c
@@ -136,7 +136,7 @@
unsigned long *load_size)
{
const efi_char16_t *cmdline = image->load_options;
- int cmdline_len = image->load_options_size / 2;
+ int cmdline_len = image->load_options_size;
unsigned long efi_chunk_size = ULONG_MAX;
efi_file_protocol_t *volume = NULL;
efi_file_protocol_t *file;
@@ -148,6 +148,9 @@
if (!load_addr || !load_size)
return EFI_INVALID_PARAMETER;
+ efi_apply_loadoptions_quirk((const void **)&cmdline, &cmdline_len);
+ cmdline_len /= sizeof(*cmdline);
+
if (IS_ENABLED(CONFIG_X86) && !efi_nochunk)
efi_chunk_size = EFI_READ_CHUNK_SIZE;
diff --git a/drivers/firmware/efi/libstub/relocate.c b/drivers/firmware/efi/libstub/relocate.c
index 9b1aaf8..8ee9eb2 100644
--- a/drivers/firmware/efi/libstub/relocate.c
+++ b/drivers/firmware/efi/libstub/relocate.c
@@ -20,8 +20,8 @@
*
* Return: status code
*/
-static efi_status_t efi_low_alloc_above(unsigned long size, unsigned long align,
- unsigned long *addr, unsigned long min)
+efi_status_t efi_low_alloc_above(unsigned long size, unsigned long align,
+ unsigned long *addr, unsigned long min)
{
unsigned long map_size, desc_size, buff_size;
efi_memory_desc_t *map;
diff --git a/drivers/firmware/efi/libstub/vsprintf.c b/drivers/firmware/efi/libstub/vsprintf.c
index e65ef49..1088e28 100644
--- a/drivers/firmware/efi/libstub/vsprintf.c
+++ b/drivers/firmware/efi/libstub/vsprintf.c
@@ -135,7 +135,7 @@
break;
default:
unreachable();
- };
+ }
return end;
}
diff --git a/drivers/firmware/efi/mokvar-table.c b/drivers/firmware/efi/mokvar-table.c
new file mode 100644
index 0000000..d8bc013
--- /dev/null
+++ b/drivers/firmware/efi/mokvar-table.c
@@ -0,0 +1,359 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * mokvar-table.c
+ *
+ * Copyright (c) 2020 Red Hat
+ * Author: Lenny Szubowicz <lszubowi@redhat.com>
+ *
+ * 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 <linux/capability.h>
+#include <linux/efi.h>
+#include <linux/init.h>
+#include <linux/io.h>
+#include <linux/kernel.h>
+#include <linux/kobject.h>
+#include <linux/list.h>
+#include <linux/slab.h>
+
+#include <asm/early_ioremap.h>
+
+/*
+ * 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;
+ void *va = NULL;
+ unsigned long cur_offset = 0;
+ unsigned long offset_limit;
+ unsigned long map_size = 0;
+ unsigned long map_size_needed = 0;
+ unsigned long size;
+ struct efi_mokvar_table_entry *mokvar_entry;
+ int err;
+
+ 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;
+ }
+
+ offset_limit = efi_mem_desc_end(&md) - 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.
+ */
+ err = -EINVAL;
+ 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=%lu.\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/drivers/firmware/efi/vars.c b/drivers/firmware/efi/vars.c
index 274b0ee..41c1d00 100644
--- a/drivers/firmware/efi/vars.c
+++ b/drivers/firmware/efi/vars.c
@@ -32,10 +32,6 @@
*/
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 @@
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 @@
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
* @ops: efivars operations
diff --git a/drivers/firmware/google/Kconfig b/drivers/firmware/google/Kconfig
index a3a6ca6..97968ae 100644
--- a/drivers/firmware/google/Kconfig
+++ b/drivers/firmware/google/Kconfig
@@ -15,7 +15,7 @@
help
Say Y here if you want to enable SMI callbacks for Google
platforms. This provides an interface for writing to and
- clearing the event log. If EFI_VARS is also enabled this
+ clearing the event log. If CONFIG_EFI is also enabled this
driver provides an interface for reading and writing NVRAM
variables.
diff --git a/drivers/firmware/google/gsmi.c b/drivers/firmware/google/gsmi.c
index 5b2011e..7d9367b2 100644
--- a/drivers/firmware/google/gsmi.c
+++ b/drivers/firmware/google/gsmi.c
@@ -302,7 +302,7 @@
return rc;
}
-#ifdef CONFIG_EFI_VARS
+#ifdef CONFIG_EFI
static struct efivars efivars;
@@ -483,7 +483,7 @@
.get_next_variable = gsmi_get_next_variable,
};
-#endif /* CONFIG_EFI_VARS */
+#endif /* CONFIG_EFI */
static ssize_t eventlog_write(struct file *filp, struct kobject *kobj,
struct bin_attribute *bin_attr,
@@ -1007,7 +1007,7 @@
goto out_remove_bin_file;
}
-#ifdef CONFIG_EFI_VARS
+#ifdef CONFIG_EFI
ret = efivars_register(&efivars, &efivar_ops, gsmi_kobj);
if (ret) {
printk(KERN_INFO "gsmi: Failed to register efivars\n");
@@ -1047,7 +1047,7 @@
unregister_die_notifier(&gsmi_die_notifier);
atomic_notifier_chain_unregister(&panic_notifier_list,
&gsmi_panic_notifier);
-#ifdef CONFIG_EFI_VARS
+#ifdef CONFIG_EFI
efivars_unregister(&efivars);
#endif
diff --git a/include/linux/cper.h b/include/linux/cper.h
index 8537e92..6a511a1 100644
--- a/include/linux/cper.h
+++ b/include/linux/cper.h
@@ -230,6 +230,18 @@
#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_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
@@ -443,7 +455,7 @@
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 +473,7 @@
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 +495,16 @@
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;
diff --git a/include/linux/efi.h b/include/linux/efi.h
index f216c02..d7c0e73 100644
--- a/include/linux/efi.h
+++ b/include/linux/efi.h
@@ -358,6 +358,7 @@
#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)
@@ -547,6 +548,7 @@
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;
@@ -985,8 +987,6 @@
bool deleting;
};
-extern struct list_head efivar_sysfs_list;
-
static inline void
efivar_unregister(struct efivar_entry *var)
{
@@ -1038,15 +1038,6 @@
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);
-
-#define EFIVARS_DATA_SIZE_MAX 1024
-
-#endif /* CONFIG_EFI_VARS */
extern bool efi_capsule_pending(int *reset_type);
extern int efi_capsule_supported(efi_guid_t guid, u32 flags,
@@ -1253,4 +1244,36 @@
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 */
diff --git a/include/linux/pe.h b/include/linux/pe.h
index 8ad71d7..daf09ff 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
diff --git a/security/integrity/platform_certs/load_uefi.c b/security/integrity/platform_certs/load_uefi.c
index 253fb9a..ee4b4c6 100644
--- a/security/integrity/platform_certs/load_uefi.c
+++ b/security/integrity/platform_certs/load_uefi.c
@@ -66,6 +66,65 @@
}
/*
+ * load_moklist_certs() - Load MokList certs
+ *
+ * Load the certs contained in the UEFI MokListRT database into the
+ * platform trusted keyring.
+ *
+ * This routine checks the EFI MOK config table first. If and only if
+ * that fails, this routine uses the MokListRT ordinary UEFI variable.
+ *
+ * Return: Status
+ */
+static int __init load_moklist_certs(void)
+{
+ struct efi_mokvar_table_entry *mokvar_entry;
+ efi_guid_t mok_var = EFI_SHIM_LOCK_GUID;
+ void *mok;
+ unsigned long moksize;
+ efi_status_t status;
+ int rc;
+
+ /* First try to load certs from the EFI MOKvar config table.
+ * It's not an error if the MOKvar config table doesn't exist
+ * or the MokListRT entry is not found in it.
+ */
+ mokvar_entry = efi_mokvar_entry_find("MokListRT");
+ if (mokvar_entry) {
+ rc = parse_efi_signature_list("UEFI:MokListRT (MOKvar table)",
+ mokvar_entry->data,
+ mokvar_entry->data_size,
+ get_handler_for_db);
+ /* All done if that worked. */
+ if (!rc)
+ return rc;
+
+ pr_err("Couldn't parse MokListRT signatures from EFI MOKvar config table: %d\n",
+ rc);
+ }
+
+ /* Get MokListRT. It might not exist, so it isn't an error
+ * if we can't get it.
+ */
+ mok = get_cert_list(L"MokListRT", &mok_var, &moksize, &status);
+ if (mok) {
+ rc = parse_efi_signature_list("UEFI:MokListRT",
+ mok, moksize, get_handler_for_db);
+ kfree(mok);
+ if (rc)
+ pr_err("Couldn't parse MokListRT signatures: %d\n", rc);
+ return rc;
+ }
+ if (status == EFI_NOT_FOUND)
+ pr_debug("MokListRT variable wasn't found\n");
+ else
+ pr_info("Couldn't get UEFI MokListRT\n");
+ return 0;
+}
+
+/*
+ * load_uefi_certs() - Load certs from UEFI sources
+ *
* Load the certs contained in the UEFI databases into the platform trusted
* keyring and the UEFI blacklisted X.509 cert SHA256 hashes into the blacklist
* keyring.
@@ -73,17 +132,16 @@
static int __init load_uefi_certs(void)
{
efi_guid_t secure_var = EFI_IMAGE_SECURITY_DATABASE_GUID;
- efi_guid_t mok_var = EFI_SHIM_LOCK_GUID;
- void *db = NULL, *dbx = NULL, *mok = NULL;
- unsigned long dbsize = 0, dbxsize = 0, moksize = 0;
+ void *db = NULL, *dbx = NULL;
+ unsigned long dbsize = 0, dbxsize = 0;
efi_status_t status;
int rc = 0;
if (!efi_rt_services_supported(EFI_RT_SUPPORTED_GET_VARIABLE))
return false;
- /* Get db, MokListRT, and dbx. They might not exist, so it isn't
- * an error if we can't get them.
+ /* Get db and dbx. They might not exist, so it isn't an error
+ * if we can't get them.
*/
if (!uefi_check_ignore_db()) {
db = get_cert_list(L"db", &secure_var, &dbsize, &status);
@@ -102,20 +160,6 @@
}
}
- mok = get_cert_list(L"MokListRT", &mok_var, &moksize, &status);
- if (!mok) {
- if (status == EFI_NOT_FOUND)
- pr_debug("MokListRT variable wasn't found\n");
- else
- pr_info("Couldn't get UEFI MokListRT\n");
- } else {
- rc = parse_efi_signature_list("UEFI:MokListRT",
- mok, moksize, get_handler_for_db);
- if (rc)
- pr_err("Couldn't parse MokListRT signatures: %d\n", rc);
- kfree(mok);
- }
-
dbx = get_cert_list(L"dbx", &secure_var, &dbxsize, &status);
if (!dbx) {
if (status == EFI_NOT_FOUND)
@@ -131,6 +175,9 @@
kfree(dbx);
}
+ /* Load the MokListRT certs */
+ rc = load_moklist_certs();
+
return rc;
}
late_initcall(load_uefi_certs);
