From: Matt Fleming <matt@codeblueprint.co.uk>
To: Andrei Borzenkov <arvidjaar@gmail.com>
Cc: The development of GNU GRUB <grub-devel@gnu.org>,
Colin Watson <cjwatson@debian.org>,
Vladimir 'phcoder' Serbinenko <phcoder@gmail.com>
Subject: Re: Bugs and tasks for 2.02[~rc1]
Date: Wed, 9 Mar 2016 15:18:24 +0000 [thread overview]
Message-ID: <20160309151824.GA15775@codeblueprint.co.uk> (raw)
In-Reply-To: <56DE5BBF.5050108@gmail.com>
On Tue, 08 Mar, at 07:57:35AM, Andrei Borzenkov wrote:
> >> - 64-bit kernel on 32-bit platform like Baytrail can't work
>
> Do you mean "32 bit EFI"? If yes, why is it a problem?
The biggest issue is that there's no way right now for a boot loader
to tell the kernel that it needs to use a translation layer when
calling EFI services (we refer to this as the "thunk" layer in the
kernel) without going via the EFI handover protocol.
Obviously this could be achieved by writing the required code for GRUB
but it would be largely duplicated from the existing code EFI boot
stub code in the kernel. I don't think it's worth the effort.
The kernel figures out when to use the thunk layer by taking note of
which EFI handover offset entry point the boot loader entered from, we
include both a 32-bit and 64-bit entry point when CONFIG_EFI_MIXED is
enabled.
next prev parent reply other threads:[~2016-03-09 15:18 UTC|newest]
Thread overview: 57+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-03-02 15:01 Bugs and tasks for 2.02[~rc1] Vladimir 'phcoder' Serbinenko
2016-03-02 22:24 ` Daniel Kiper
2016-03-09 10:49 ` Daniel Kiper
[not found] ` <20160309144557.GA19753@char.us.oracle.com>
2016-03-09 14:51 ` Vladimir 'phcoder' Serbinenko
2016-03-09 20:05 ` Daniel Kiper
2016-03-04 20:06 ` Peter Jones
2016-03-05 8:38 ` Andrei Borzenkov
2016-03-07 19:00 ` Peter Jones
2016-03-07 19:57 ` Vladimir 'phcoder' Serbinenko
2016-03-07 20:33 ` Andrei Borzenkov
2016-03-07 20:40 ` Vladimir 'phcoder' Serbinenko
2016-03-07 20:57 ` Andrei Borzenkov
2016-03-07 21:03 ` Vladimir 'phcoder' Serbinenko
2016-03-07 21:20 ` Peter Jones
2016-03-07 21:29 ` Andrei Borzenkov
2016-03-07 22:01 ` Peter Jones
2016-03-07 22:07 ` Vladimir 'phcoder' Serbinenko
2016-03-08 4:16 ` Michael Chang
2016-03-08 3:40 ` Michael Chang
2016-03-08 4:57 ` Andrei Borzenkov
2016-03-09 15:18 ` Matt Fleming [this message]
2016-03-09 20:15 ` Linux loader EFI handover (was: Bugs and tasks for 2.02[~rc1]) Andrei Borzenkov
2016-03-10 14:21 ` Matt Fleming
2016-03-11 17:46 ` Linux loader EFI handover Andrei Borzenkov
2016-03-07 21:42 ` Bugs and tasks for 2.02[~rc1] Matt Fleming
2016-03-11 15:51 ` Vladimir 'phcoder' Serbinenko
2016-03-14 15:17 ` Matt Fleming
2016-03-15 17:38 ` Vladimir 'phcoder' Serbinenko
2016-03-22 17:54 ` Peter Jones
2016-03-07 21:14 ` Peter Jones
2016-03-07 21:50 ` Vladimir 'phcoder' Serbinenko
2016-03-07 21:10 ` Peter Jones
2016-03-11 18:01 ` Andrei Borzenkov
2016-03-07 21:03 ` Peter Jones
2016-03-07 21:08 ` Andrei Borzenkov
2016-03-07 21:26 ` Peter Jones
2016-03-07 21:08 ` Vladimir 'phcoder' Serbinenko
2016-03-08 17:57 ` Andrei Borzenkov
2016-03-08 21:47 ` Peter Jones
2016-03-11 18:38 ` Andrei Borzenkov
2016-03-09 6:38 ` Olaf Hering
2016-03-09 7:54 ` Michael Chang
2016-03-09 8:13 ` Andrei Borzenkov
2016-03-11 16:04 ` Vladimir 'phcoder' Serbinenko
2016-04-13 8:49 ` Olaf Hering
2016-03-13 6:30 ` Andrei Borzenkov
2016-03-22 18:48 ` Vladimir 'phcoder' Serbinenko
2016-03-22 19:51 ` Andrei Borzenkov
2016-04-18 4:18 ` Vladimir 'phcoder' Serbinenko
[not found] ` <20160328145903.GF17944@char.us.oracle.com>
2016-04-12 16:44 ` Konrad Rzeszutek Wilk
2016-04-18 4:20 ` Vladimir 'phcoder' Serbinenko
2016-04-12 17:53 ` Bruce Dubbs
2016-04-18 4:20 ` Vladimir 'phcoder' Serbinenko
-- strict thread matches above, loose matches on Subject: below --
2016-03-03 14:47 Juergen Gross
2016-03-09 10:52 ` Daniel Kiper
2016-03-11 15:47 ` Vladimir 'phcoder' Serbinenko
2016-03-11 15:57 ` Juergen Gross
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