[coreboot] Linux 4.7 kernel payload with CoreBoot 4.4
ron minnich
rminnich at gmail.com
Mon Dec 12 17:10:10 CET 2016
coreboot got fixed, not linux :-)
On Mon, Dec 12, 2016 at 8:05 AM Trammell Hudson <hudson at trmm.net> wrote:
> On Wed, Aug 10, 2016 at 07:03:58AM -0600, Trammell Hudson wrote:
> > The Linux 4.7 kernel payload crashes early in the boot process
> > with CoreBoot 4.4. [...]
>
> The recently released 4.9 kernel does not require any patches to boot
> as coreboot's payload. The diffs in head_64.S appear to be
> related to the efi config values and I'm not sure if this is the
> actual change the fixed it:
>
> --- build/linux-4.7/arch/x86/boot/compressed/head_64.S 2016-12-12
> 10:21:20.934784655 -0500
> +++ build/linux-4.9/arch/x86/boot/compressed/head_64.S 2016-12-11
> 14:17:54.000000000 -0500
> @@ -265,7 +265,7 @@
> /*
> * Relocate efi_config->call().
> */
> - addq %rbp, efi64_config+88(%rip)
> + addq %rbp, efi64_config+32(%rip)
>
> movq %rax, %rdi
> call make_boot_params
> @@ -285,7 +285,7 @@
> * Relocate efi_config->call().
> */
> movq efi_config(%rip), %rax
> - addq %rbp, 88(%rax)
> + addq %rbp, 32(%rax)
> 2:
> movq efi_config(%rip), %rdi
> call efi_main
> @@ -463,14 +457,14 @@
> #ifdef CONFIG_EFI_MIXED
> .global efi32_config
> efi32_config:
> - .fill 11,8,0
> + .fill 4,8,0
> .quad efi64_thunk
> .byte 0
> #endif
>
> .global efi64_config
> efi64_config:
> - .fill 11,8,0
> + .fill 4,8,0
> .quad efi_call
> .byte 1
> #endif /* CONFIG_EFI_STUB */
>
>
> --
> Trammell
>
> --
> coreboot mailing list: coreboot at coreboot.org
> https://www.coreboot.org/mailman/listinfo/coreboot
>
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