From: Matt Fleming <matt-mF/unelCI9GS6iBeEJttW/XRex20P6io@public.gmane.org>
To: Ard Biesheuvel <ard.biesheuvel-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org>
Cc: "linux-efi-u79uwXL29TY76Z2rM5mHXA@public.gmane.org"
<linux-efi-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>,
"linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org"
<linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org>,
Leif Lindholm
<leif.lindholm-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org>,
Mark Rutland <mark.rutland-5wv7dgnIgG8@public.gmane.org>,
Peter Jones <pjones-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>,
"Baicar, Tyler" <tbaicar-sgV2jX0FEOL9JmXXK+q4OQ@public.gmane.org>,
Dave Young <dyoung-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>,
Matthew Garrett <mjg59-1xO5oi07KQx4cg9Nei1l7Q@public.gmane.org>
Subject: Re: [PATCH v2 1/2] efi: esrt: use memremap not ioremap to access ESRT table in memory
Date: Thu, 18 Feb 2016 14:38:25 +0000 [thread overview]
Message-ID: <20160218143825.GI2651@codeblueprint.co.uk> (raw)
In-Reply-To: <CAKv+Gu8RP21vw1Ht7UtkHsen2GMUNx8DikH-hLaezV+uZvWO-g-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
On Thu, 18 Feb, at 03:21:25PM, Ard Biesheuvel wrote:
>
> We treat all Boot Services regions like Loader Code/Data or free
> regions: it is all recorded in memblock as usable memory, and only the
> regions that are explicitly reserved are protected from further
> general use.
>
> I am currently looking into the memory attribute table, and the use
> case is very similar. It would be very useful from our pov to simply
> memblock_reserve() the region right after having called
> efi_config_parse_tables(), and actually consume its data when we get
> around to it later. The ESRT handling is already split down the middle
> in the same way.
Agreed, this would also be useful in general for kexec. I've got a
couple of patches in flight that try to handle the BGRT case in a
different way,
https://lkml.kernel.org/r/1455723910-16710-2-git-send-email-matt-mF/unelCI9GS6iBeEJttW/XRex20P6io@public.gmane.org
https://lkml.kernel.org/r/1455723910-16710-3-git-send-email-matt-mF/unelCI9GS6iBeEJttW/XRex20P6io@public.gmane.org
Let me instead take a look at how we might be able to preserve only
those Boot Services regions we care out.
WARNING: multiple messages have this Message-ID (diff)
From: matt@codeblueprint.co.uk (Matt Fleming)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH v2 1/2] efi: esrt: use memremap not ioremap to access ESRT table in memory
Date: Thu, 18 Feb 2016 14:38:25 +0000 [thread overview]
Message-ID: <20160218143825.GI2651@codeblueprint.co.uk> (raw)
In-Reply-To: <CAKv+Gu8RP21vw1Ht7UtkHsen2GMUNx8DikH-hLaezV+uZvWO-g@mail.gmail.com>
On Thu, 18 Feb, at 03:21:25PM, Ard Biesheuvel wrote:
>
> We treat all Boot Services regions like Loader Code/Data or free
> regions: it is all recorded in memblock as usable memory, and only the
> regions that are explicitly reserved are protected from further
> general use.
>
> I am currently looking into the memory attribute table, and the use
> case is very similar. It would be very useful from our pov to simply
> memblock_reserve() the region right after having called
> efi_config_parse_tables(), and actually consume its data when we get
> around to it later. The ESRT handling is already split down the middle
> in the same way.
Agreed, this would also be useful in general for kexec. I've got a
couple of patches in flight that try to handle the BGRT case in a
different way,
https://lkml.kernel.org/r/1455723910-16710-2-git-send-email-matt at codeblueprint.co.uk
https://lkml.kernel.org/r/1455723910-16710-3-git-send-email-matt at codeblueprint.co.uk
Let me instead take a look at how we might be able to preserve only
those Boot Services regions we care out.
next prev parent reply other threads:[~2016-02-18 14:38 UTC|newest]
Thread overview: 64+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-02-15 11:32 [PATCH v2 0/2] efi: ARM/arm64: wire up ESRT table Ard Biesheuvel
2016-02-15 11:32 ` Ard Biesheuvel
[not found] ` <1455535953-5056-1-git-send-email-ard.biesheuvel-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org>
2016-02-15 11:32 ` [PATCH v2 1/2] efi: esrt: use memremap not ioremap to access ESRT table in memory Ard Biesheuvel
2016-02-15 11:32 ` Ard Biesheuvel
[not found] ` <1455535953-5056-2-git-send-email-ard.biesheuvel-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org>
2016-02-15 15:45 ` Peter Jones
2016-02-15 15:45 ` Peter Jones
2016-02-16 19:19 ` Baicar, Tyler
2016-02-16 19:19 ` Baicar, Tyler
2016-02-18 10:44 ` Matt Fleming
2016-02-18 10:44 ` Matt Fleming
[not found] ` <20160218104407.GC2651-mF/unelCI9GS6iBeEJttW/XRex20P6io@public.gmane.org>
2016-02-18 12:16 ` Ard Biesheuvel
2016-02-18 12:16 ` Ard Biesheuvel
[not found] ` <CAKv+Gu_AW7PKJJOd2mbEu3LKJe+gNaPHnH=sgO=YXM_KWFyKxw-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2016-02-18 13:28 ` Matt Fleming
2016-02-18 13:28 ` Matt Fleming
[not found] ` <20160218132824.GE2651-mF/unelCI9GS6iBeEJttW/XRex20P6io@public.gmane.org>
2016-02-18 13:29 ` Ard Biesheuvel
2016-02-18 13:29 ` Ard Biesheuvel
[not found] ` <CAKv+Gu-s1pzYBzuDG-Z7s3gyo8dPOfeidZQ+rim-uAWZCBcKQQ-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2016-02-18 13:43 ` Matt Fleming
2016-02-18 13:43 ` Matt Fleming
[not found] ` <20160218134324.GG2651-mF/unelCI9GS6iBeEJttW/XRex20P6io@public.gmane.org>
2016-02-18 13:44 ` Ard Biesheuvel
2016-02-18 13:44 ` Ard Biesheuvel
[not found] ` <CAKv+Gu875r9RkDC723kNsG4XC0eSE9RPPmSFZrD0sx0QxS+V4g-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2016-02-18 14:15 ` Matt Fleming
2016-02-18 14:15 ` Matt Fleming
[not found] ` <20160218141544.GH2651-mF/unelCI9GS6iBeEJttW/XRex20P6io@public.gmane.org>
2016-02-18 14:21 ` Ard Biesheuvel
2016-02-18 14:21 ` Ard Biesheuvel
[not found] ` <CAKv+Gu8RP21vw1Ht7UtkHsen2GMUNx8DikH-hLaezV+uZvWO-g-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2016-02-18 14:38 ` Matt Fleming [this message]
2016-02-18 14:38 ` Matt Fleming
2016-02-19 9:27 ` Dave Young
2016-02-19 9:27 ` Dave Young
2016-02-18 19:16 ` Peter Jones
2016-02-18 19:16 ` Peter Jones
[not found] ` <20160218191624.GA1515-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2016-02-26 14:41 ` Matt Fleming
2016-02-26 14:41 ` Matt Fleming
[not found] ` <20160226144114.GA7475-mF/unelCI9GS6iBeEJttW/XRex20P6io@public.gmane.org>
2016-03-01 23:30 ` Matt Fleming
2016-03-01 23:30 ` Matt Fleming
[not found] ` <20160301233040.GA31476-mF/unelCI9GS6iBeEJttW/XRex20P6io@public.gmane.org>
2016-03-01 23:31 ` Matt Fleming
2016-03-01 23:31 ` Matt Fleming
2016-03-02 1:16 ` Dave Young
2016-03-02 1:16 ` Dave Young
[not found] ` <20160302011619.GA3192-0VdLhd/A9Pl+NNSt+8eSiB/sF2h8X+2i0E9HWUfgJXw@public.gmane.org>
2016-03-02 10:23 ` Matt Fleming
2016-03-02 10:23 ` Matt Fleming
2016-03-04 6:25 ` Dave Young
2016-03-04 6:25 ` Dave Young
[not found] ` <20160304062524.GA19010-0VdLhd/A9Pl+NNSt+8eSiB/sF2h8X+2i0E9HWUfgJXw@public.gmane.org>
2016-05-18 8:36 ` Ard Biesheuvel
2016-05-18 8:36 ` Ard Biesheuvel
[not found] ` <CAKv+Gu_ekP+44FJjR7BY_MFqx2jQgc6Tk9W4SBL__ttdvQ55VQ-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2016-05-18 8:53 ` Matt Fleming
2016-05-18 8:53 ` Matt Fleming
[not found] ` <20160518085348.GG21993-mF/unelCI9GS6iBeEJttW/XRex20P6io@public.gmane.org>
2016-06-16 13:47 ` Ard Biesheuvel
2016-06-16 13:47 ` Ard Biesheuvel
2016-06-20 11:49 ` Matt Fleming
2016-06-20 11:49 ` Matt Fleming
2016-02-15 11:32 ` [PATCH v2 2/2] arm64/efi: esrt: add missing call to efi_esrt_init() Ard Biesheuvel
2016-02-15 11:32 ` Ard Biesheuvel
[not found] ` <1455535953-5056-3-git-send-email-ard.biesheuvel-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org>
2016-02-15 15:46 ` Peter Jones
2016-02-15 15:46 ` Peter Jones
2016-02-16 20:25 ` Baicar, Tyler
2016-02-16 20:25 ` Baicar, Tyler
[not found] ` <56C385D3.3090308-sgV2jX0FEOL9JmXXK+q4OQ@public.gmane.org>
2016-02-17 8:32 ` Ard Biesheuvel
2016-02-17 8:32 ` Ard Biesheuvel
2016-05-17 20:36 ` Christopher Covington
2016-05-17 20:36 ` Christopher Covington
-- strict thread matches above, loose matches on Subject: below --
2016-07-11 19:00 [PATCH v2 0/2] efi/arm*: wire up ESRT table Ard Biesheuvel
[not found] ` <1468263646-28184-1-git-send-email-ard.biesheuvel-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org>
2016-07-11 19:00 ` [PATCH v2 1/2] efi: esrt: use memremap not ioremap to access ESRT table in memory Ard Biesheuvel
2016-07-11 19:00 ` Ard Biesheuvel
[not found] ` <1468263646-28184-2-git-send-email-ard.biesheuvel-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org>
2016-07-15 15:05 ` Matt Fleming
2016-07-15 15:05 ` Matt Fleming
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