On Thu, Aug 03, 2023 at 10:41:50AM +0800, Pingfan Liu wrote:
> From: Jeremy Linton <jeremy.linton@xxxxxxx>
>
> The linux kernel CONFIG_ZBOOT option creates
> self decompressing PE kernel images. So this means
> that kexec should have a generic understanding of
> the format which may be used by multiple arches.
>
> So lets add an arch independent validation
> and decompression routine.
>
> Signed-off-by: Jeremy Linton <jeremy.linton@xxxxxxx>
> [Modified by Pingfan to export kernel fd]
> Signed-off-by: Pingfan Liu <piliu@xxxxxxxxxx>
> To: kexec@xxxxxxxxxxxxxxxxxxx
> Cc: horms@xxxxxxxxxxxx
> Cc: ardb@xxxxxxxxxx
> Cc: jeremy.linton@xxxxxxx
> ---
> include/Makefile | 1 +
> include/kexec-pe-zboot.h | 15 +++++
> kexec/Makefile | 1 +
> kexec/kexec-pe-zboot.c | 131 +++++++++++++++++++++++++++++++++++++++
> 4 files changed, 148 insertions(+)
> create mode 100644 include/kexec-pe-zboot.h
> create mode 100644 kexec/kexec-pe-zboot.c
>
> diff --git a/include/Makefile b/include/Makefile
> index 621ce9f..cd88a26 100644
> --- a/include/Makefile
> +++ b/include/Makefile
> @@ -1,6 +1,7 @@
> dist += include/Makefile \
> include/config.h \
> include/config.h.in \
> + include/kexec-pe-zboot.h \
> include/kexec-uImage.h \
> include/x86/x86-linux.h \
> include/x86/mb_info.h \
> diff --git a/include/kexec-pe-zboot.h b/include/kexec-pe-zboot.h
> new file mode 100644
> index 0000000..c588ca2
> --- /dev/null
> +++ b/include/kexec-pe-zboot.h
> @@ -0,0 +1,15 @@
> +#ifndef __KEXEC_PE_ZBOOT_H__
> +#define __KEXEC_PE_ZBOOT_H__
> +
> +/* see drivers/firmware/efi/libstub/zboot-header.S */
> +struct linux_pe_zboot_header {
> + uint32_t mz_magic;
> + uint32_t image_type;
> + uint32_t payload_offset;
> + uint32_t payload_size;
> + uint32_t reserved[2];
> + uint32_t compress_type;
> +};
nit: the above should consistently use tabs for indentation.
I can try and fix this when applying if there is no v8.
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