x86/kexec: Move relocate_kernel to kernel .data section

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Now that the copy is executed instead of the original, the relocate_kernel
page can live in the kernel's .text section. This will allow subsequent
commits to actually add real data to it and clean up the code somewhat as
well as making the control page ROX.

Signed-off-by: David Woodhouse <dwmw@amazon.co.uk>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Cc: Baoquan He <bhe@redhat.com>
Cc: Vivek Goyal <vgoyal@redhat.com>
Cc: Dave Young <dyoung@redhat.com>
Cc: Eric Biederman <ebiederm@xmission.com>
Cc: Ard Biesheuvel <ardb@kernel.org>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Link: https://lore.kernel.org/r/20241205153343.3275139-9-dwmw2@infradead.org

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This commit is contained in:

David Woodhouse 2024-12-05 15:05:14 +00:00 • committed by Ingo Molnar

parent eeebbde571

commit cb33ff9e06

5 changed files with 25 additions and 8 deletions

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1

arch/x86/include/asm/sections.h

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6

arch/x86/kernel/callthunks.c

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4

arch/x86/kernel/machine_kexec_64.c

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7

arch/x86/kernel/relocate_kernel_64.S

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13

arch/x86/kernel/vmlinux.lds.S

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