linux-kernel - RE: [PATCH 03/32] ACPICA: Hardware: Enable 64-bit firmware waking vector for selected FACS.

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Date:	Wed, 24 Jun 2015 00:13:43 +0000
From:	"Zheng, Lv" <lv.zheng@...el.com>
To:	"Rafael J. Wysocki" <rafael@...nel.org>
CC:	"Wysocki, Rafael J" <rafael.j.wysocki@...el.com>,
	"Brown, Len" <len.brown@...el.com>, Lv Zheng <zetalog@...il.com>,
	"Linux Kernel Mailing List" <linux-kernel@...r.kernel.org>,
	ACPI Devel Maling List <linux-acpi@...r.kernel.org>,
	"Moore, Robert" <robert.moore@...el.com>
Subject: RE: [PATCH 03/32] ACPICA: Hardware: Enable 64-bit firmware waking
 vector for selected FACS.

Hi, Rafael

> From: rjwysocki@...il.com [mailto:rjwysocki@...il.com] On Behalf Of Rafael J. Wysocki
> Sent: Tuesday, June 23, 2015 11:21 PM
> 
> Hi Lv,
> 
> On Fri, Jun 19, 2015 at 5:38 AM, Lv Zheng <lv.zheng@...el.com> wrote:
> > ACPICA commit 7aa598d711644ab0de5f70ad88f1e2de253115e4
> >
> > The root cause of the reported bug might be one of the followings:
> > 1. BIOS may favor the 64-bit firmware waking vector address when the
> >    version of the FACS is greater than 0 and Linux currently only supports
> >    resuming from the real mode, so the 64-bit firmware waking vector has
> >    never been set and might be invalid to BIOS while the commit enables
> >    higher version FACS.
> > 2. BIOS may favor the FACS reported via the "FIRMWARE_CTRL" field in the
> >    FADT while the commit doesn't set the firmware waking vector address of
> 
> Can you please tell me which commit this is about?

It's the bisected commit on the Bugzilla entry:
https://bugzilla.kernel.org/show_bug.cgi?id=74021#c23
Since the part of this series originally belongs to a regression fix series, the commit is not mentioned again here.
Let me update the description.

Thanks and best regards
-Lv

> 
> >    the FACS reported by "FIRMWARE_CTRL", it only sets the firware waking
> >    vector address of the FACS reported by "X_FIRMWARE_CTRL".
> 
> Thanks,
> Rafael