path: root/block
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authorLinus Torvalds <>2020-03-30 16:13:08 -0700
committerLinus Torvalds <>2020-03-30 16:13:08 -0700
commita776c270a0b2fad6715cb714187e4290cadb9237 (patch)
tree6221a924a1a388a791c33a9223d62991b18b6515 /block
parent7c4fa150714fb319d4e2bb2303ebbd7307b0fb6d (diff)
parent594e576d4b93b8cda3247542366b47e1b2ddc4dc (diff)
Merge branch 'efi-core-for-linus' of git://
Pull EFI updates from Ingo Molnar: "The EFI changes in this cycle are much larger than usual, for two (positive) reasons: - The GRUB project is showing signs of life again, resulting in the introduction of the generic Linux/UEFI boot protocol, instead of x86 specific hacks which are increasingly difficult to maintain. There's hope that all future extensions will now go through that boot protocol. - Preparatory work for RISC-V EFI support. The main changes are: - Boot time GDT handling changes - Simplify handling of EFI properties table on arm64 - Generic EFI stub cleanups, to improve command line handling, file I/O, memory allocation, etc. - Introduce a generic initrd loading method based on calling back into the firmware, instead of relying on the x86 EFI handover protocol or device tree. - Introduce a mixed mode boot method that does not rely on the x86 EFI handover protocol either, and could potentially be adopted by other architectures (if another one ever surfaces where one execution mode is a superset of another) - Clean up the contents of 'struct efi', and move out everything that doesn't need to be stored there. - Incorporate support for UEFI spec v2.8A changes that permit firmware implementations to return EFI_UNSUPPORTED from UEFI runtime services at OS runtime, and expose a mask of which ones are supported or unsupported via a configuration table. - Partial fix for the lack of by-VA cache maintenance in the decompressor on 32-bit ARM. - Changes to load device firmware from EFI boot service memory regions - Various documentation updates and minor code cleanups and fixes" * 'efi-core-for-linus' of git:// (114 commits) efi/libstub/arm: Fix spurious message that an initrd was loaded efi/libstub/arm64: Avoid image_base value from efi_loaded_image partitions/efi: Fix partition name parsing in GUID partition entry efi/x86: Fix cast of image argument efi/libstub/x86: Use ULONG_MAX as upper bound for all allocations efi: Fix a mistype in comments mentioning efivar_entry_iter_begin() efi/libstub: Avoid linking libstub/lib-ksyms.o into vmlinux efi/x86: Preserve %ebx correctly in efi_set_virtual_address_map() efi/x86: Ignore the memory attributes table on i386 efi/x86: Don't relocate the kernel unless necessary efi/x86: Remove extra headroom for setup block efi/x86: Add kernel preferred address to PE header efi/x86: Decompress at start of PE image load address x86/boot/compressed/32: Save the output address instead of recalculating it efi/libstub/x86: Deal with exit() boot service returning x86/boot: Use unsigned comparison for addresses efi/x86: Avoid using code32_start efi/x86: Make efi32_pe_entry() more readable efi/x86: Respect 32-bit ABI in efi32_pe_entry() efi/x86: Annotate the LOADED_IMAGE_PROTOCOL_GUID with SYM_DATA ...
Diffstat (limited to 'block')
2 files changed, 27 insertions, 10 deletions
diff --git a/block/partitions/efi.c b/block/partitions/efi.c
index db2fef7dfc47..b64bfdd4326c 100644
--- a/block/partitions/efi.c
+++ b/block/partitions/efi.c
@@ -657,6 +657,31 @@ static int find_valid_gpt(struct parsed_partitions *state, gpt_header **gpt,
+ * utf16_le_to_7bit(): Naively converts a UTF-16LE string to 7-bit ASCII characters
+ * @in: input UTF-16LE string
+ * @size: size of the input string
+ * @out: output string ptr, should be capable to store @size+1 characters
+ *
+ * Description: Converts @size UTF16-LE symbols from @in string to 7-bit
+ * ASCII characters and stores them to @out. Adds trailing zero to @out array.
+ */
+static void utf16_le_to_7bit(const __le16 *in, unsigned int size, u8 *out)
+ unsigned int i = 0;
+ out[size] = 0;
+ while (i < size) {
+ u8 c = le16_to_cpu(in[i]) & 0xff;
+ if (c && !isprint(c))
+ c = '!';
+ out[i] = c;
+ i++;
+ }
* efi_partition(struct parsed_partitions *state)
* @state: disk parsed partitions
@@ -692,7 +717,6 @@ int efi_partition(struct parsed_partitions *state)
for (i = 0; i < le32_to_cpu(gpt->num_partition_entries) && i < state->limit-1; i++) {
struct partition_meta_info *info;
- unsigned label_count = 0;
unsigned label_max;
u64 start = le64_to_cpu(ptes[i].starting_lba);
u64 size = le64_to_cpu(ptes[i].ending_lba) -
@@ -713,14 +737,7 @@ int efi_partition(struct parsed_partitions *state)
/* Naively convert UTF16-LE to 7 bits. */
label_max = min(ARRAY_SIZE(info->volname) - 1,
- info->volname[label_max] = 0;
- while (label_count < label_max) {
- u8 c = ptes[i].partition_name[label_count] & 0xff;
- if (c && !isprint(c))
- c = '!';
- info->volname[label_count] = c;
- label_count++;
- }
+ utf16_le_to_7bit(ptes[i].partition_name, label_max, info->volname);
state->parts[i + 1].has_info = true;
diff --git a/block/partitions/efi.h b/block/partitions/efi.h
index 907bac5ce8f7..8cc2b88d0aa8 100644
--- a/block/partitions/efi.h
+++ b/block/partitions/efi.h
@@ -88,7 +88,7 @@ typedef struct _gpt_entry {
__le64 starting_lba;
__le64 ending_lba;
gpt_entry_attributes attributes;
- efi_char16_t partition_name[72 / sizeof (efi_char16_t)];
+ __le16 partition_name[72/sizeof(__le16)];
} __packed gpt_entry;
typedef struct _gpt_mbr_record {