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

From: Rafael J. Wysocki
Date: Fri Jun 19 2015 - 19:15:07 EST

On Friday, June 19, 2015 11:38:28 AM Lv Zheng wrote:
> ACPICA commit 7aa598d711644ab0de5f70ad88f1e2de253115e4
> The root cause of the reported bug might be one of the followings:

Care to describe the bug in the changelog too? And in a few following
changelogs as well?

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

I speak only for myself.
Rafael J. Wysocki, Intel Open Source Technology Center.
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