From: Matthew Garrett <mjg59@srcf.ucam.org>
To: "Li, Aubrey" <aubrey.li@linux.intel.com>
Cc: "H. Peter Anvin" <hpa@zytor.com>,
"H. Peter Anvin" <hpa@linux.intel.com>,
"alan@linux.intel.com" <alan@linux.intel.com>,
linux-kernel@vger.kernel.org, Len.Brown@intel.com,
Adam Williamson <awilliam@redhat.com>
Subject: Re: [patch] x86: Introduce BOOT_EFI and BOOT_CF9 into the reboot sequence loop
Date: Sun, 2 Mar 2014 23:11:54 +0000 [thread overview]
Message-ID: <20140302231154.GA20891@srcf.ucam.org> (raw)
In-Reply-To: <5313B47B.6020402@linux.intel.com>
On Mon, Mar 03, 2014 at 06:45:15AM +0800, Li, Aubrey wrote:
> One example in my hand is, 32bit windows calls 32bit EFI firware, so
> reboot works. However, I installed 64bit linux on this 32bit EFI
> machine, so none of ACPI/KBD/EFI works.
Yes. The correct fix for that is to ensure that the 64-bit kernel can
make 32-bit runtime services calls.
> Other cases even if we figured out why ACPI/KBD/EFI don't work, we still
> have to make our change in the linux kernel, because we can't change
> firmware.
That's correct, yes. If Windows is able to reboot the system and Linux
is not, then that's a bug in the Linux kernel.
> So, if you are still suggesting we add EFI only, please let me know your
> plan about adding dmidecode table and if it's acceptable to add new
> tables, I have three waiting: ASUS-T100, Dell Venue 8 Pro, and Dell
> Venue 11 Pro.
I don't think it's acceptable to add DMI entries to the reboot table. I
think you should add the EFI call (since we expect that to work now),
and I have no objection to adding cf9 to the end of the list if we have
standard PCI io ports (Windows doesn't do it, but we can hardly make
things worse).
--
Matthew Garrett | mjg59@srcf.ucam.org
next prev parent reply other threads:[~2014-03-02 23:12 UTC|newest]
Thread overview: 46+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-02-28 4:11 [patch] x86: Introduce BOOT_EFI and BOOT_CF9 into the reboot sequence loop Li, Aubrey
2014-02-28 4:56 ` Matthew Garrett
2014-02-28 5:22 ` Li, Aubrey
2014-02-28 5:56 ` Matthew Garrett
2014-02-28 6:07 ` Li, Aubrey
2014-02-28 6:12 ` Matthew Garrett
2014-02-28 6:20 ` Li, Aubrey
2014-02-28 6:23 ` Matthew Garrett
2014-02-28 6:39 ` Li, Aubrey
2014-02-28 6:44 ` Matthew Garrett
2014-02-28 6:54 ` Li, Aubrey
2014-02-28 17:47 ` H. Peter Anvin
2014-02-28 22:11 ` Li, Aubrey
2014-02-28 22:16 ` Adam Williamson
2014-03-01 17:10 ` Li, Aubrey
2014-03-01 17:22 ` Matthew Garrett
2014-03-01 17:31 ` Li, Aubrey
2014-03-01 18:19 ` Matthew Garrett
2014-03-01 19:01 ` Matthew Garrett
2014-03-02 0:15 ` Li, Aubrey
2014-03-01 20:06 ` H. Peter Anvin
2014-03-01 20:21 ` Matthew Garrett
2014-03-01 20:26 ` H. Peter Anvin
2014-03-02 0:26 ` Li, Aubrey
2014-03-02 0:33 ` H. Peter Anvin
2014-03-02 1:47 ` Li, Aubrey
2014-03-02 2:07 ` H. Peter Anvin
2014-03-02 2:20 ` Li, Aubrey
2014-03-02 2:23 ` Matthew Garrett
2014-03-02 2:35 ` H. Peter Anvin
2014-03-02 10:39 ` Li, Aubrey
2014-03-02 16:52 ` H. Peter Anvin
2014-03-02 22:13 ` Li, Aubrey
2014-03-02 22:26 ` Matthew Garrett
2014-03-02 22:45 ` Li, Aubrey
2014-03-02 23:11 ` Matthew Garrett [this message]
2014-03-02 23:23 ` Li, Aubrey
2014-03-03 0:07 ` Matthew Garrett
2014-03-03 0:18 ` H. Peter Anvin
2014-03-03 1:36 ` Li, Aubrey
2014-03-03 1:47 ` H. Peter Anvin
2014-03-03 1:49 ` Li, Aubrey
2014-03-03 22:11 ` Li, Aubrey
2014-03-02 23:57 ` H. Peter Anvin
2014-03-05 23:39 ` [tip:x86/reboot] x86, reboot: Add EFI and CF9 reboot methods into the default list tip-bot for Li, Aubrey
2014-03-05 23:45 ` [tip:x86/reboot] x86, reboot: Only use CF9_COND automatically, not CF9 tip-bot for H. Peter Anvin
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