From: Matt Fleming <matt-mF/unelCI9GS6iBeEJttW/XRex20P6io@public.gmane.org>
To: Borislav Petkov <bp-Gina5bIWoIWzQB+pC5nmwQ@public.gmane.org>
Cc: Andy Lutomirski <luto-kltTT9wpgjJwATOyAt5JVQ@public.gmane.org>,
Greg Kroah-Hartman
<gregkh-hQyY1W1yCW8ekmWlsbkhG0B+6BGkLq7r@public.gmane.org>,
"Kweh,
Hock Leong"
<hock.leong.kweh-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>,
Ming Lei <ming.lei-Z7WLFzj8eWMS+FvcfC7Uqw@public.gmane.org>,
Ong Boon Leong
<boon.leong.ong-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>,
LKML <linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>,
"linux-efi-u79uwXL29TY76Z2rM5mHXA@public.gmane.org"
<linux-efi-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>,
Sam Protsenko
<semen.protsenko-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org>,
Peter Jones <pjones-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>,
Roy Franz <roy.franz-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org>
Subject: Re: [PATCH v4 1/2] firmware_loader: introduce new API - request_firmware_direct_full_path()
Date: Wed, 15 Apr 2015 12:09:05 +0100 [thread overview]
Message-ID: <20150415110905.GC4804@codeblueprint.co.uk> (raw)
In-Reply-To: <20150415101805.GC2282-fF5Pk5pvG8Y@public.gmane.org>
On Wed, 15 Apr, at 12:18:05PM, Borislav Petkov wrote:
> On Wed, Apr 15, 2015 at 11:14:55AM +0100, Matt Fleming wrote:
> > Well, I haven't come across a scenario where you need a brand new
> > interface for getting it *out* of the kernel again.
>
> Well, how are we going to read crash data on next boot then? EFI var or
> what? Are we going to have a generic interface like
>
> /sys/.../capsule/...
>
> or how are we imagining this to look like?
You can read it out in userspace using the existing pstorefs code. The
last thing we need to do is introduce more userspace APIs ;-)
It's possible (and desirable) to separate the input interface from
output.
I've written patches in the past where the EFI kernel subsystem
discovers capsules with a specific GUID reserved for crash data, and
then hands that data to the pstore subsystem. Things are then exposed
via pstorefs. The capsule code would just be another backend to pstore,
similar to how the EFI variable code works today.
I am in no way advocating for yet another crash API.
--
Matt Fleming, Intel Open Source Technology Center
next prev parent reply other threads:[~2015-04-15 11:09 UTC|newest]
Thread overview: 62+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-04-14 9:44 [PATCH v4 0/2] Enable capsule loader interface for efi firmware updating Kweh, Hock Leong
[not found] ` <1429004697-28320-1-git-send-email-hock.leong.kweh-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
2015-04-14 9:44 ` [PATCH v4 1/2] firmware_loader: introduce new API - request_firmware_direct_full_path() Kweh, Hock Leong
2015-04-14 14:08 ` Greg Kroah-Hartman
2015-04-14 15:56 ` Andy Lutomirski
[not found] ` <CALCETrW_aXJ1iiXCa6aTE3r3J3EF_Njn5bb9=At_3ajCzPFSPg-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2015-04-14 16:18 ` Borislav Petkov
[not found] ` <20150414161833.GE14069-fF5Pk5pvG8Y@public.gmane.org>
2015-04-15 10:14 ` Matt Fleming
[not found] ` <20150415101455.GB4804-mF/unelCI9GS6iBeEJttW/XRex20P6io@public.gmane.org>
2015-04-15 10:18 ` Borislav Petkov
[not found] ` <20150415101805.GC2282-fF5Pk5pvG8Y@public.gmane.org>
2015-04-15 11:09 ` Matt Fleming [this message]
2015-04-15 13:15 ` Greg Kroah-Hartman
2015-04-15 15:53 ` Andy Lutomirski
[not found] ` <1429004697-28320-2-git-send-email-hock.leong.kweh-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
2015-04-15 12:48 ` Matt Fleming
2015-04-14 9:44 ` [PATCH v4 2/2] efi: an sysfs interface for user to update efi firmware Kweh, Hock Leong
[not found] ` <1429004697-28320-3-git-send-email-hock.leong.kweh-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
2015-04-14 14:09 ` Greg Kroah-Hartman
[not found] ` <20150414140914.GE5989-U8xfFu+wG4EAvxtiuMwx3w@public.gmane.org>
2015-04-14 15:52 ` Andy Lutomirski
[not found] ` <CALCETrWeW8Gp9QFGCVhPmNo_Z+xsCJN7LYMPD6XNc92_dKMz3g-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2015-04-15 13:20 ` Greg Kroah-Hartman
[not found] ` <20150415132000.GD21491-U8xfFu+wG4EAvxtiuMwx3w@public.gmane.org>
2015-04-15 15:45 ` Andy Lutomirski
[not found] ` <CALCETrWUTjTLmwPZAwXrj06SwYaSX_7+XSTsVun2+HYC4wsqZQ-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2015-04-16 0:19 ` Roy Franz
[not found] ` <CAFECyb-bthi74VwkF8fpZg8ZpoyORmE5X+8dbRGG1uTP8RUm_A-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2015-04-17 13:50 ` Greg KH
2015-04-15 11:32 ` Kweh, Hock Leong
[not found] ` <F54AEECA5E2B9541821D670476DAE19C2B8D2AEA-j2khPEwRog0FyVwBAnZdSLfspsVTdybXVpNB7YpNyf8@public.gmane.org>
2015-04-15 13:19 ` Greg Kroah-Hartman
2015-04-16 9:42 ` Kweh, Hock Leong
[not found] ` <F54AEECA5E2B9541821D670476DAE19C2B8D2E74-j2khPEwRog0FyVwBAnZdSLfspsVTdybXVpNB7YpNyf8@public.gmane.org>
2015-04-17 13:49 ` Greg Kroah-Hartman
2015-04-17 14:36 ` Matt Fleming
[not found] ` <20150417143640.GB3671-mF/unelCI9GS6iBeEJttW/XRex20P6io@public.gmane.org>
2015-04-20 3:28 ` Kweh, Hock Leong
2015-04-20 14:43 ` Greg Kroah-Hartman
[not found] ` <20150420144323.GA7261-U8xfFu+wG4EAvxtiuMwx3w@public.gmane.org>
2015-04-21 3:23 ` Kweh, Hock Leong
[not found] ` <F54AEECA5E2B9541821D670476DAE19C2CC11869-j2khPEwRog0FyVwBAnZdSLfspsVTdybXVpNB7YpNyf8@public.gmane.org>
2015-04-21 7:56 ` Greg Kroah-Hartman
[not found] ` <20150421075620.GA11000-U8xfFu+wG4EAvxtiuMwx3w@public.gmane.org>
2015-04-22 1:21 ` James Bottomley
[not found] ` <1429665679.2207.44.camel-d9PhHud1JfjCXq6kfMZ53/egYHeGw8Jk@public.gmane.org>
2015-04-22 1:58 ` Andy Lutomirski
2015-04-22 2:20 ` James Bottomley
[not found] ` <1429669228.2207.46.camel-d9PhHud1JfjCXq6kfMZ53/egYHeGw8Jk@public.gmane.org>
2015-04-22 3:24 ` Andy Lutomirski
[not found] ` <CALCETrVsmQxoJ6WxVnW03Q9Hq8oH=zuv662S6TJxFwb26d=erQ-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2015-04-22 4:51 ` James Bottomley
[not found] ` <1429678269.18798.9.camel-d9PhHud1JfjCXq6kfMZ53/egYHeGw8Jk@public.gmane.org>
2015-04-22 16:50 ` Andy Lutomirski
[not found] ` <CALCETrU5u5nUJB4i0KRPZGvXgohW5ojxxOOv-_pR2OLmypvXyw-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2015-04-22 17:34 ` James Bottomley
[not found] ` <1429724049.2195.44.camel-d9PhHud1JfjCXq6kfMZ53/egYHeGw8Jk@public.gmane.org>
2015-04-22 17:45 ` Andy Lutomirski
[not found] ` <CALCETrX9GZmWnfkm-CwKW-2mPvRbNcRaY6tUY=8e0THsPBKMcA-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2015-04-22 13:27 ` Peter Jones
2015-04-22 15:18 ` James Bottomley
[not found] ` <1429715913.2195.22.camel-d9PhHud1JfjCXq6kfMZ53/egYHeGw8Jk@public.gmane.org>
2015-04-22 15:24 ` One Thousand Gnomes
2015-04-23 8:30 ` Kweh, Hock Leong
2015-04-23 14:09 ` James Bottomley
[not found] ` <1429798187.2170.3.camel-d9PhHud1JfjCXq6kfMZ53/egYHeGw8Jk@public.gmane.org>
2015-04-24 2:14 ` Kweh, Hock Leong
[not found] ` <F54AEECA5E2B9541821D670476DAE19C2CC12798-j2khPEwRog0FyVwBAnZdSLfspsVTdybXVpNB7YpNyf8@public.gmane.org>
2015-04-24 15:16 ` James Bottomley
[not found] ` <1429888575.2182.20.camel-d9PhHud1JfjCXq6kfMZ53/egYHeGw8Jk@public.gmane.org>
2015-04-27 21:59 ` Andy Lutomirski
[not found] ` <CALCETrU2G10uGvdB6kVyfMPA=biuZwK7BAeqmKuY=jvN38K2wA-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2015-04-27 22:35 ` James Bottomley
[not found] ` <1430174136.2314.49.camel-d9PhHud1JfjCXq6kfMZ53/egYHeGw8Jk@public.gmane.org>
2015-04-27 22:40 ` Andy Lutomirski
[not found] ` <CALCETrXeh+y1XZrdDyhEmy+GK6z7-swZNPYGZybnqzppWAE+Wg-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2015-04-27 22:51 ` James Bottomley
[not found] ` <1430175112.2314.56.camel-d9PhHud1JfjCXq6kfMZ53/egYHeGw8Jk@public.gmane.org>
2015-04-29 11:23 ` Kweh, Hock Leong
2015-04-29 18:40 ` Andy Lutomirski
[not found] ` <CALCETrXBFBqwZ=A+zoC5Lj0Zr2_2hEkSBX0hrLZJRjyDWqjucA-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2015-04-29 21:37 ` James Bottomley
2015-04-30 9:17 ` Kweh, Hock Leong
[not found] ` <F54AEECA5E2B9541821D670476DAE19C2CC142E1-j2khPEwRog0FyVwBAnZdSLfspsVTdybXVpNB7YpNyf8@public.gmane.org>
2015-04-30 17:55 ` Andy Lutomirski
[not found] ` <F54AEECA5E2B9541821D670476DAE19C2CC13F37-j2khPEwRog0FyVwBAnZdSLfspsVTdybXVpNB7YpNyf8@public.gmane.org>
2015-04-29 21:35 ` James Bottomley
2015-04-29 21:36 ` Andy Lutomirski
2015-04-29 21:39 ` James Bottomley
2015-04-29 21:42 ` Andy Lutomirski
2015-04-20 17:59 ` James Bottomley
[not found] ` <20150415131906.GC21491-U8xfFu+wG4EAvxtiuMwx3w@public.gmane.org>
2015-04-22 15:35 ` James Bottomley
[not found] ` <1429716954.2195.28.camel-d9PhHud1JfjCXq6kfMZ53/egYHeGw8Jk@public.gmane.org>
2015-04-22 15:46 ` Greg Kroah-Hartman
[not found] ` <20150422154620.GA32576-U8xfFu+wG4EAvxtiuMwx3w@public.gmane.org>
2015-04-22 16:11 ` James Bottomley
[not found] ` <1429719077.2195.37.camel-d9PhHud1JfjCXq6kfMZ53/egYHeGw8Jk@public.gmane.org>
2015-04-23 9:50 ` Greg Kroah-Hartman
2015-04-23 16:14 ` James Bottomley
[not found] ` <1429805658.6624.2.camel-d9PhHud1JfjCXq6kfMZ53/egYHeGw8Jk@public.gmane.org>
2015-04-23 20:38 ` Greg Kroah-Hartman
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