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| author | Linus Torvalds <torvalds@linux-foundation.org> | 2019-09-14 15:58:02 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2019-09-14 15:58:02 -0700 |
| commit | b03c036e6f96340dd311817c7b964dad183c4141 (patch) | |
| tree | ad58fa152e995a03d63958ea98f344721ce88e8b /arch | |
| parent | 36024fcf8d28999f270908e75675d43b099ff7b3 (diff) | |
| parent | 474efecb65dceb15f793b6e2f2b226e952f0f8e9 (diff) | |
Merge tag 'riscv/for-v5.3' of git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux
Pull RISC-V fix from Paul Walmsley:
"Last week, Palmer and I learned that there was an error in the RISC-V
kernel image header format that could make it less compatible with the
ARM64 kernel image header format. I had missed this error during my
original reviews of the patch.
The kernel image header format is an interface that impacts
bootloaders, QEMU, and other user tools. Those packages must be
updated to align with whatever is merged in the kernel. We would like
to avoid proliferating these image formats by keeping the RISC-V
header as close as possible to the existing ARM64 header. Since the
arch/riscv patch that adds support for the image header was merged
with our v5.3-rc1 pull request as commit 0f327f2aaad6a ("RISC-V: Add
an Image header that boot loader can parse."), we think it wise to try
to fix this error before v5.3 is released.
The fix itself should be backwards-compatible with any project that
has already merged support for premature versions of this interface.
It primarily involves ensuring that the RISC-V image header has
something useful in the same field as the ARM64 image header"
* tag 'riscv/for-v5.3' of git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux:
riscv: modify the Image header to improve compatibility with the ARM64 header
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/riscv/include/asm/image.h | 12 | ||||
| -rw-r--r-- | arch/riscv/kernel/head.S | 4 |
2 files changed, 8 insertions, 8 deletions
diff --git a/arch/riscv/include/asm/image.h b/arch/riscv/include/asm/image.h index ef28e106f247..344db5244547 100644 --- a/arch/riscv/include/asm/image.h +++ b/arch/riscv/include/asm/image.h @@ -3,7 +3,8 @@ #ifndef __ASM_IMAGE_H #define __ASM_IMAGE_H -#define RISCV_IMAGE_MAGIC "RISCV" +#define RISCV_IMAGE_MAGIC "RISCV\0\0\0" +#define RISCV_IMAGE_MAGIC2 "RSC\x05" #define RISCV_IMAGE_FLAG_BE_SHIFT 0 #define RISCV_IMAGE_FLAG_BE_MASK 0x1 @@ -23,7 +24,7 @@ #define __HEAD_FLAGS (__HEAD_FLAG(BE)) #define RISCV_HEADER_VERSION_MAJOR 0 -#define RISCV_HEADER_VERSION_MINOR 1 +#define RISCV_HEADER_VERSION_MINOR 2 #define RISCV_HEADER_VERSION (RISCV_HEADER_VERSION_MAJOR << 16 | \ RISCV_HEADER_VERSION_MINOR) @@ -39,9 +40,8 @@ * @version: version * @res1: reserved * @res2: reserved - * @magic: Magic number - * @res3: reserved (will be used for additional RISC-V specific - * header) + * @magic: Magic number (RISC-V specific; deprecated) + * @magic2: Magic number 2 (to match the ARM64 'magic' field pos) * @res4: reserved (will be used for PE COFF offset) * * The intention is for this header format to be shared between multiple @@ -58,7 +58,7 @@ struct riscv_image_header { u32 res1; u64 res2; u64 magic; - u32 res3; + u32 magic2; u32 res4; }; #endif /* __ASSEMBLY__ */ diff --git a/arch/riscv/kernel/head.S b/arch/riscv/kernel/head.S index 0f1ba17e476f..52eec0c1bf30 100644 --- a/arch/riscv/kernel/head.S +++ b/arch/riscv/kernel/head.S @@ -39,9 +39,9 @@ ENTRY(_start) .word RISCV_HEADER_VERSION .word 0 .dword 0 - .asciz RISCV_IMAGE_MAGIC - .word 0 + .ascii RISCV_IMAGE_MAGIC .balign 4 + .ascii RISCV_IMAGE_MAGIC2 .word 0 .global _start_kernel |