From: Matthew Garrett <matthew.garrett-05XSO3Yj/JvQT0dZR+AlfA@public.gmane.org>
To: "hpa-YMNOUZJC4hwAvxtiuMwx3w@public.gmane.org"
<hpa-YMNOUZJC4hwAvxtiuMwx3w@public.gmane.org>
Cc: "linux-efi-u79uwXL29TY76Z2rM5mHXA@public.gmane.org"
<linux-efi-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>,
"matt.fleming-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org"
<matt.fleming-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>,
"stable-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org"
<stable-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>
Subject: Re: [PATCH] UEFI: Don't use UEFI time services on 32-bit
Date: Tue, 10 Dec 2013 22:58:29 +0000 [thread overview]
Message-ID: <1386716246.26245.2.camel@x230> (raw)
In-Reply-To: <52A79B9A.7080004-YMNOUZJC4hwAvxtiuMwx3w@public.gmane.org>
On Tue, 2013-12-10 at 14:54 -0800, H. Peter Anvin wrote:
> Ping on this?
No TAD, yes ACPI declaration for RTC.
> Unless we find evidence to the contrary, we should probably do:
>
> ACPI TAD > PNP0B0x > EFI > hard probing
EFI is preferable to PNP in that it gives us a timezone, and Windows
certainly calls the EFI time functions. *However*, it doesn't appear to
do so once the system is booted. So we probably want to call it in the
boot stub and find some way to pass the timezone information up to the
kernel, and then spend some more time instrumenting Windows to figure
out how it makes time calls.
--
Matthew Garrett <matthew.garrett@nebula.com>
next prev parent reply other threads:[~2013-12-10 22:58 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-11-29 19:44 [PATCH] UEFI: Don't use UEFI time services on 32-bit Matthew Garrett
[not found] ` <1385754283-2464-1-git-send-email-matthew.garrett-05XSO3Yj/JvQT0dZR+AlfA@public.gmane.org>
2013-11-29 22:04 ` joeyli
[not found] ` <1385762647.3539.4.camel-ONCj+Eqt86TasUa73XJKwA@public.gmane.org>
2013-11-29 22:30 ` Borislav Petkov
2013-12-05 10:56 ` Matt Fleming
2013-11-30 1:45 ` H. Peter Anvin
[not found] ` <52994324.4000404-YMNOUZJC4hwAvxtiuMwx3w@public.gmane.org>
2013-12-10 22:54 ` H. Peter Anvin
[not found] ` <52A79B9A.7080004-YMNOUZJC4hwAvxtiuMwx3w@public.gmane.org>
2013-12-10 22:58 ` Matthew Garrett [this message]
2013-12-10 23:20 ` H. Peter Anvin
[not found] ` <52A7A1B0.7050903-YMNOUZJC4hwAvxtiuMwx3w@public.gmane.org>
2013-12-10 23:24 ` Matthew Garrett
2013-12-10 23:51 ` H. Peter Anvin
[not found] ` <52A7A915.1070701-YMNOUZJC4hwAvxtiuMwx3w@public.gmane.org>
2013-12-11 0:20 ` joeyli
[not found] ` <1386721257.3539.1717.camel-ONCj+Eqt86TasUa73XJKwA@public.gmane.org>
2013-12-11 4:00 ` H. Peter Anvin
2013-12-10 23:22 ` [tip:x86/urgent] x86, efi: Don't use (U) EFI time services on 32 bit tip-bot for Matthew Garrett
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=1386716246.26245.2.camel@x230 \
--to=matthew.garrett-05xso3yj/jvqt0dzr+alfa@public.gmane.org \
--cc=hpa-YMNOUZJC4hwAvxtiuMwx3w@public.gmane.org \
--cc=linux-efi-u79uwXL29TY76Z2rM5mHXA@public.gmane.org \
--cc=matt.fleming-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org \
--cc=stable-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.