From: Eric Van Hensbergen <ericvh@gmail.com>
To: Michael Neuling <mikey@neuling.org>
Cc: linuxppc-dev@lists.ozlabs.org, linux-kernel@vger.kernel.org,
bg-linux@lists.anl-external.org
Subject: Re: [PATCH 3/7] [RFC] add support for BlueGene/P FPU
Date: Thu, 19 May 2011 19:30:20 -0500 [thread overview]
Message-ID: <BANLkTindzEFRjEGkc9bLccrFUdVtvbA73A@mail.gmail.com> (raw)
In-Reply-To: <6241.1305847001@neuling.org>
On Thu, May 19, 2011 at 6:16 PM, Michael Neuling <mikey@neuling.org> wrote:
> In message <BANLkTi=3Drc5vZm3xAXHpHSxSH1wBWKhv92A@mail.gmail.com> you wro=
te:
>> On Thu, May 19, 2011 at 4:36 PM, Michael Neuling <mikey@neuling.org> wro=
te:
>> > In message <BANLkTimKhApFW8G1-pG0u_9Kv2YB0R1O0w@mail.gmail.com> you wr=
ote=3D
>> :
>> >> On Thu, May 19, 2011 at 12:58 AM, Michael Neuling <mikey@neuling.org>=
wr=3D
>> ote=3D3D
>> >> :
>> >> > Eric,
>> >> >
>> >> >> This patch adds save/restore register support for the BlueGene/P
>> >> >> double hummer FPU.
>> >> >
>> >> > What does this mean? =3D3DA0Needs more details here.
>> >> >
>>
>> okay, I've changed it a bit in [V2], if you want more I can do my best.
>
> If you can describe the whole primary and secondary registers that'd be
> cool. =A0ASCII art would be awesome! :-)
>
You sure you don't just want a bitfield.conf? :) I'll do my best, but my
ASCII art isn't what it used to be. I'll also include a reference to the P=
DF.
>> >
>> > Ok, sounds like there is 32*8*2 bytes of data, rather than the normal
>> > 32*8 bytes for FP only (ignoring VSX). =3DA0If this is the case, then =
you'l=3D
>> l
>> > need make 'fpr' in the thread struct bigger which you can do by settin=
g
>> > TS_FPRWIDTH =3D3D 2 like we do for VSX.
>> >
Okay - so basically what I have now and TS_FPRWIDTH=3D2 ?
>>
>> Since it isn't available on other chips, shoudl it just be PPC_BGP_FPU
>> or PPC_BGP_DOUBLE_FPU?
>
> I'd probably still prefer it disassociated with the CPU name, but we are
> really bike shedding here. =A0I'm not too fussed.
>
I'll leave it separate and switch it to PPC_FP2 (or would you prefer
PPC_FP2_FPU to make it clear) since the public PDF refers to it this way.
If that all sounds good, I'll spin [V3] tomorrow.
-eric
next prev parent reply other threads:[~2011-05-20 0:30 UTC|newest]
Thread overview: 43+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-05-18 21:24 [PATCH 1/7] [RFC] Mainline BG/P platform support Eric Van Hensbergen
2011-05-18 21:24 ` [PATCH 2/7] [RFC] add bluegene entry to cputable Eric Van Hensbergen
2011-05-20 0:35 ` Benjamin Herrenschmidt
2011-05-20 1:08 ` Eric Van Hensbergen
2011-05-20 1:50 ` Benjamin Herrenschmidt
2011-05-18 21:24 ` [PATCH 3/7] [RFC] add support for BlueGene/P FPU Eric Van Hensbergen
2011-05-19 5:58 ` Michael Neuling
2011-05-19 13:53 ` Eric Van Hensbergen
2011-05-19 15:22 ` [bg-linux] " Kazutomo Yoshii
2011-05-19 21:36 ` Michael Neuling
2011-05-19 21:55 ` Eric Van Hensbergen
2011-05-19 23:16 ` Michael Neuling
2011-05-20 0:30 ` Eric Van Hensbergen [this message]
2011-05-20 0:43 ` Michael Neuling
2011-05-20 0:53 ` Benjamin Herrenschmidt
2011-05-20 0:52 ` Benjamin Herrenschmidt
2011-05-19 21:41 ` [PATCH 3/7] [RFC][V2] add support for BlueGene/P Double FPU Eric Van Hensbergen
2011-05-18 21:24 ` [PATCH 4/7] [RFC] enable L1_WRITETHROUGH mode for BG/P Eric Van Hensbergen
2011-05-19 10:43 ` Josh Boyer
2011-05-19 12:53 ` Eric Van Hensbergen
2011-05-19 21:42 ` [PATCH 4/7] [RFC][V2] enable BGP_L1_WRITETHROUGH " Eric Van Hensbergen
2011-05-20 1:01 ` [PATCH 4/7] [RFC] enable L1_WRITETHROUGH " Benjamin Herrenschmidt
2011-05-18 21:24 ` [PATCH 5/7] [RFC] force 32-byte aligned kmallocs Eric Van Hensbergen
2011-05-20 0:36 ` Benjamin Herrenschmidt
2011-05-20 0:47 ` Eric Van Hensbergen
2011-05-20 1:50 ` Benjamin Herrenschmidt
2011-05-20 1:32 ` [bg-linux] " Kazutomo Yoshii
2011-05-20 2:08 ` Benjamin Herrenschmidt
2011-05-20 2:13 ` Benjamin Herrenschmidt
2011-05-20 3:02 ` Kazutomo Yoshii
2011-05-20 3:13 ` Benjamin Herrenschmidt
2011-05-18 21:24 ` [PATCH 6/7] [RFC] enable early TLBs for BG/P Eric Van Hensbergen
2011-05-20 0:39 ` Benjamin Herrenschmidt
2011-05-20 1:21 ` Eric Van Hensbergen
2011-05-20 1:54 ` Benjamin Herrenschmidt
2011-05-20 3:38 ` [bg-linux] " Kazutomo Yoshii
2011-05-20 3:52 ` Benjamin Herrenschmidt
2011-05-20 13:01 ` Eric Van Hensbergen
2011-05-20 22:20 ` Benjamin Herrenschmidt
2011-05-18 21:24 ` [PATCH 7/7] [RFC] SMP support code Eric Van Hensbergen
2011-05-20 1:05 ` Benjamin Herrenschmidt
2011-05-19 11:01 ` [PATCH 1/7] [RFC] Mainline BG/P platform support Josh Boyer
2011-05-19 12:35 ` Eric Van Hensbergen
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