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From: "Jarkko Sakkinen" <jarkko@kernel.org>
To: "Neal Gompa" <ngompa13@gmail.com>
Cc: "Jan Hendrik Farr" <kernel@jfarr.cc>,
	<linux-kernel@vger.kernel.org>,
	<systemd-devel@lists.freedesktop.org>, <x86@kernel.org>,
	<kexec@lists.infradead.org>, <dhowells@redhat.com>,
	<keyrings@vger.kernel.org>, <bluca@debian.org>,
	<bhelgaas@google.com>, <tglx@linutronix.de>,
	<akpm@linux-foundation.org>
Subject: Re: [systemd-devel] [PATCH 0/1] x86/kexec: UKI support
Date: Tue, 12 Sep 2023 13:37:47 +0300	[thread overview]
Message-ID: <CVGVGJIQPIZ2.WN97L6BV5S97@suppilovahvero> (raw)
In-Reply-To: <CAEg-Je9GF5S+QcsspM_CzDSxzCN8h2eRp7BbctC1x7-rH8j68g@mail.gmail.com>

On Tue Sep 12, 2023 at 2:20 AM EEST, Neal Gompa wrote: > On Mon, Sep 11, 2023 at 7:15 PM Jarkko Sakkinen <jarkko@kernel.org> wrote:
> > On Sat Sep 9, 2023 at 7:18 PM EEST, Jan Hendrik Farr wrote:
> > > Hello,
> > >
> > > this patch implements UKI support for kexec_file_load. It will require support
> > > in the kexec-tools userspace utility. For testing purposes the following can be used:
> > > https://github.com/Cydox/kexec-test/
> > >
> > > There has been discussion on this topic in an issue on GitHub that is linked below
> > > for reference.
> > >
> > >
> > > Some links:
> > > - Related discussion: https://github.com/systemd/systemd/issues/28538
> > > - Documentation of UKIs: https://uapi-group.org/specifications/specs/unified_kernel_image/
> > >
> > > Jan Hendrik Farr (1):
> > >   x86/kexec: UKI support
> > >
> > >  arch/x86/include/asm/kexec-uki.h       |   7 ++
> > >  arch/x86/include/asm/parse_pefile.h    |  32 +++++++
> > >  arch/x86/kernel/Makefile               |   2 +
> > >  arch/x86/kernel/kexec-uki.c            | 113 +++++++++++++++++++++++++
> > >  arch/x86/kernel/machine_kexec_64.c     |   2 +
> > >  arch/x86/kernel/parse_pefile.c         | 110 ++++++++++++++++++++++++
> > >  crypto/asymmetric_keys/mscode_parser.c |   2 +-
> > >  crypto/asymmetric_keys/verify_pefile.c | 110 +++---------------------
> > >  crypto/asymmetric_keys/verify_pefile.h |  16 ----
> > >  9 files changed, 278 insertions(+), 116 deletions(-)
> > >  create mode 100644 arch/x86/include/asm/kexec-uki.h
> > >  create mode 100644 arch/x86/include/asm/parse_pefile.h
> > >  create mode 100644 arch/x86/kernel/kexec-uki.c
> > >  create mode 100644 arch/x86/kernel/parse_pefile.c
> > >
> > > --
> > > 2.40.1
> >
> > What the heck is UKI?
>
> Unified Kernel Images. More details available here:
> https://uapi-group.org/specifications/specs/unified_kernel_image/
>
> It's a way of creating initramfs-style images as fully generic,
> reproducible images that can be built server-side.

You can build today a kernel with these compiled in:

1. EFI stub
2. initeramfs
3. cmdline

Why another way (and label 'UKI') for a pre-existing feature?

BR, Jarkko

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  reply	other threads:[~2023-09-12 10:37 UTC|newest]

Thread overview: 26+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2023-09-09 16:18 [PATCH 0/1] x86/kexec: UKI support Jan Hendrik Farr
2023-09-09 16:18 ` [PATCH 1/1] " Jan Hendrik Farr
2023-09-09 17:15 ` [PATCH 0/1] " Luca Boccassi
2023-09-09 17:57   ` Jan Hendrik Farr
2023-09-09 18:10     ` Luca Boccassi
2023-09-11  3:23       ` Jan Hendrik Farr
2023-09-11 22:02 ` Jarkko Sakkinen
2023-09-11 22:54   ` Jan Hendrik Farr
2023-09-12 10:33     ` Jarkko Sakkinen
2023-09-12 15:32       ` Jan Hendrik Farr
2023-09-12 17:41         ` Jarkko Sakkinen
2023-09-12 18:56           ` Jan Hendrik Farr
2023-09-12 19:24             ` Jarkko Sakkinen
2023-09-12 19:38               ` Jan Hendrik Farr
2023-09-12 20:49               ` Jan Hendrik Farr
2023-09-13 14:45                 ` Jarkko Sakkinen
2023-09-13 15:07                   ` Jan Hendrik Farr
2023-09-13 15:58                     ` Jarkko Sakkinen
2023-09-14  9:11                   ` Lennart Poettering
2023-09-14 12:12                     ` Jarkko Sakkinen
2023-09-14  8:48         ` Lennart Poettering
2023-09-14 11:52           ` Jarkko Sakkinen
2023-09-11 23:20   ` [systemd-devel] " Neal Gompa
2023-09-12 10:37     ` Jarkko Sakkinen [this message]
2023-09-18 15:41       ` Dimitri John Ledkov
2023-09-25 16:43         ` Jarkko Sakkinen

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