linux-kernel - RE: [PATCH] mailbox: pcc: Support HW-Reduced Communication Subspace Type 2

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Date:	Fri, 8 Apr 2016 19:33:20 +0000
From:	"Moore, Robert" <robert.moore@...el.com>
To:	Sudeep Holla <sudeep.holla@....com>, hotran <hotran@....com>
CC:	Jassi Brar <jassisinghbrar@...il.com>,
	"Rafael J. Wysocki" <rjw@...ysocki.net>,
	Len Brown <lenb@...nel.org>, "Zheng, Lv" <lv.zheng@...el.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-acpi@...r.kernel.org" <linux-acpi@...r.kernel.org>,
	"devel@...ica.org" <devel@...ica.org>, "lho@....com" <lho@....com>,
	"dhdang@....com" <dhdang@....com>
Subject: RE: [PATCH] mailbox: pcc: Support HW-Reduced Communication Subspace
 Type 2

Please send me the patch to actbl3.h


> -----Original Message-----
> From: Sudeep Holla [mailto:sudeep.holla@....com]
> Sent: Friday, April 08, 2016 5:58 AM
> To: hotran
> Cc: Jassi Brar; Rafael J. Wysocki; Len Brown; Moore, Robert; Zheng, Lv;
> linux-kernel@...r.kernel.org; linux-acpi@...r.kernel.org;
> devel@...ica.org; Sudeep Holla; lho@....com; dhdang@....com
> Subject: Re: [PATCH] mailbox: pcc: Support HW-Reduced Communication
> Subspace Type 2
> 
> Hi,
> 
> On 05/04/16 23:14, hotran wrote:
> > ACPI 6.1 has a HW-Reduced Communication Subspace Type 2 intended for
> > use on HW-Reduce ACPI Platform, which requires read-modify-write
> > sequence to acknowledge doorbell interrupt. This patch provides the
> > implementation for the Communication Subspace Type 2.
> >
> > Signed-off-by: Hoan Tran <hotran@....com>
> > ---
> >   drivers/mailbox/pcc.c | 384
> > +++++++++++++++++++++++++++++++++++++-------------
> 
> >   include/acpi/actbl3.h |   8 +-
> 
> This(2nd) file is generally imported from ACPICA directly.
> 
> So you need to work with acpica-devel list(you can cc Robert Moore) to get
> that alone integrated in acpica projected so that iasl tool and other
> related components also gain support for this first.
> 
> If the ACPI tables are generated by UEFI, it would be good to add the
> support in tianocore project. IIRC tianocore has some PCC reference in
> Acpi60.h header.
> 
> It would help if the above two are done before we start looking into Linux
> changes(pcc.c). To summarize this patch needs to be split.
> 
> --
> Regards,
> Sudeep