Messages in this thread Patch in this message | | | Date | Fri, 22 Jul 2016 03:25:36 -0700 | From | tip-bot for Andy Lutomirski <> | Subject | [tip:x86/boot] x86/boot: Clarify what x86_legacy_features.reserve_bios_regions does |
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Commit-ID: 30f027398b329c75c8f23a3c13be240b50866fdc Gitweb: http://git.kernel.org/tip/30f027398b329c75c8f23a3c13be240b50866fdc Author: Andy Lutomirski <luto@kernel.org> AuthorDate: Thu, 21 Jul 2016 14:16:51 -0700 Committer: Ingo Molnar <mingo@kernel.org> CommitDate: Fri, 22 Jul 2016 11:46:01 +0200
x86/boot: Clarify what x86_legacy_features.reserve_bios_regions does
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> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Kees Cook <keescook@chromium.org> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Luis R. Rodriguez <mcgrof@suse.com> Cc: Mario Limonciello <mario_limonciello@dell.com> Cc: Matthew Garrett <mjg59@srcf.ucam.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Toshi Kani <toshi.kani@hp.com> Link: http://lkml.kernel.org/r/55bd591115498440d461857a7b64f349a5d911f3.1469135598.git.luto@kernel.org Signed-off-by: Ingo Molnar <mingo@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 c519c05..66c15a0 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. */
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