Messages in this thread | | | Date | Tue, 2 Oct 2018 16:59:40 +0900 | From | AKASHI Takahiro <> | Subject | Re: [PATCH v15 07/16] arm64: add image head flag definitions |
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Hi Mark,
On Mon, Oct 01, 2018 at 01:52:26PM +0100, Mark Rutland wrote: > On Fri, Sep 28, 2018 at 03:48:32PM +0900, AKASHI Takahiro wrote: > > Those image head's flags will be used later by kexec_file loader. > > > > Signed-off-by: AKASHI Takahiro <takahiro.akashi@linaro.org> > > Cc: Catalin Marinas <catalin.marinas@arm.com> > > Cc: Will Deacon <will.deacon@arm.com> > > Acked-by: James Morse <james.morse@arm.com> > > --- > > arch/arm64/include/asm/boot.h | 15 +++++++++++++++ > > arch/arm64/kernel/head.S | 2 +- > > 2 files changed, 16 insertions(+), 1 deletion(-) > > > > diff --git a/arch/arm64/include/asm/boot.h b/arch/arm64/include/asm/boot.h > > index 355e552a9175..0bab7eed3012 100644 > > --- a/arch/arm64/include/asm/boot.h > > +++ b/arch/arm64/include/asm/boot.h > > @@ -5,6 +5,21 @@ > > > > #include <asm/sizes.h> > > > > +#define ARM64_MAGIC "ARM\x64" > > + > > +#define HEAD_FLAG_BE_SHIFT 0 > > +#define HEAD_FLAG_PAGE_SIZE_SHIFT 1 > > +#define HEAD_FLAG_BE_MASK 0x1 > > +#define HEAD_FLAG_PAGE_SIZE_MASK 0x3 > > + > > +#define HEAD_FLAG_BE 1 > > These already exist in some form in arch/arm64/kernel/image.h; can we > please factor those out rather than duplicating them?
Sure.
> I'd be happy if you'd update image.h to use the new HEAD_FLAG_* names, > and removed the old definitions.
I want to make sure two things;
1. Do you assume all the existing __HEAD_FLAG_xyz's NOT be renamed (say, to HEAD_FLAG_xyz)?
2. Do you mind removing this check in image.h? (we also need to manage 'CONFIG_EFI' part of image.h.)
> #ifndef LINKER_SCRIPT > #error This file should only be included in vmlinux.lds.S > #endif
Thanks, -Takahiro Akashi
> > +#define HEAD_FLAG_PAGE_SIZE_4K 1 > > +#define HEAD_FLAG_PAGE_SIZE_16K 2 > > +#define HEAD_FLAG_PAGE_SIZE_64K 3 > > I appreciate these are new, since we didn't previously need definitions. > > Thanks, > Mark. > > > + > > +#define head_flag_field(flags, field) \ > > + (((flags) >> field##_SHIFT) & field##_MASK) > > + > > /* > > * arm64 requires the DTB to be 8 byte aligned and > > * not exceed 2MB in size. > > diff --git a/arch/arm64/kernel/head.S b/arch/arm64/kernel/head.S > > index b0853069702f..8cbac6232ed1 100644 > > --- a/arch/arm64/kernel/head.S > > +++ b/arch/arm64/kernel/head.S > > @@ -91,7 +91,7 @@ _head: > > .quad 0 // reserved > > .quad 0 // reserved > > .quad 0 // reserved > > - .ascii "ARM\x64" // Magic number > > + .ascii ARM64_MAGIC // Magic number > > #ifdef CONFIG_EFI > > .long pe_header - _head // Offset to the PE header. > > > > -- > > 2.19.0 > >
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