Messages in this thread Patch in this message | | | From | Andy Lutomirski <> | Subject | [PATCH 1/2] x86/boot: Clarify what x86_legacy_features.reserve_bios_regions does | Date | Thu, 21 Jul 2016 14:16:51 -0700 |
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It doesn't just control probing for the EBDA -- it controls whether we detect and reserve the <1MB BIOS regions in general.
Signed-off-by: Andy Lutomirski <luto@kernel.org> --- arch/x86/include/asm/x86_init.h | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-)
diff --git a/arch/x86/include/asm/x86_init.h b/arch/x86/include/asm/x86_init.h index c519c052700a..66c15a01667f 100644 --- a/arch/x86/include/asm/x86_init.h +++ b/arch/x86/include/asm/x86_init.h @@ -168,8 +168,9 @@ struct x86_legacy_devices { * struct x86_legacy_features - legacy x86 features * * @rtc: this device has a CMOS real-time clock present - * @reserve_bios_regions: it's safe to search for the EBDA signature in the hardware's - * low RAM + * @reserve_bios_regions: boot code will search for the EBDA address and the + * start of the 640k - 1M BIOS region. If false, the platform must + * ensure that its memory map correctly reserves sub-1MB regions as needed. * @devices: legacy x86 devices, refer to struct x86_legacy_devices * documentation for further details. */ -- 2.7.4
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