From: Keir Fraser <keir.fraser@eu.citrix.com>
To: Jan Beulich <JBeulich@novell.com>, Gang Wei <gang.wei@intel.com>
Cc: "xen-devel@lists.xensource.com" <xen-devel@lists.xensource.com>
Subject: Re: [PATCH]ACPI: workaround for S3 fail in two facs tables case
Date: Thu, 25 Feb 2010 10:39:22 +0000 [thread overview]
Message-ID: <C7AC03DA.B595%keir.fraser@eu.citrix.com> (raw)
In-Reply-To: <4B86452C020000780003136C@vpn.id2.novell.com>
On 25/02/2010 08:38, "Jan Beulich" <JBeulich@novell.com> wrote:
>> /* Now FACS... */
>> - if (fadt->header.revision >= FADT2_REVISION_ID)
>> + if (fadt->header.revision >= FADT2_REVISION_ID && fadt->facs == 0)
>> facs_pa = fadt->Xfacs;
>> else
>> facs_pa = (uint64_t)fadt->facs;
>
> Wouldn't that generally suppress using fadt->Xfacs, since I think in
> order to be pre-2.0-OS compatible a BIOS would not normally set
> facs to zero when Xfacs is non-zero? Or is that a requirement by the
> spec?
Good question would be: What does Linux do here?
-- Keir
next prev parent reply other threads:[~2010-02-25 10:39 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-02-25 5:49 [PATCH]ACPI: workaround for S3 fail in two facs tables case Wei, Gang
2010-02-25 8:38 ` Jan Beulich
2010-02-25 10:39 ` Keir Fraser [this message]
2010-02-26 1:43 ` Wei, Gang
2010-02-25 11:58 ` Keir Fraser
2010-02-25 13:17 ` Jan Beulich
2010-02-25 13:24 ` Keir Fraser
2010-02-25 20:57 ` Keir Fraser
2010-02-26 1:24 ` Wei, Gang
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