From: Richard Henderson <richard.henderson@linaro.org>
To: Gerd Hoffmann <kraxel@redhat.com>, Kamil Rytarowski <n54@gmx.com>
Cc: "Fam Zheng" <fam@euphon.net>, "Ed Maste" <emaste@freebsd.org>,
"Alex Bennée" <alex.bennee@linaro.org>,
qemu-devel@nongnu.org, "Kamil Rytarowski" <kamil@netbsd.org>,
"Philippe Mathieu-Daudé" <philmd@redhat.com>,
"Li-Wen Hsu" <lwhsu@freebsd.org>,
"Brad Smith" <brad@comstyle.com>
Subject: Re: [Qemu-devel] [PATCH 11/13] tests/vm: netbsd autoinstall, using serial console
Date: Thu, 9 May 2019 09:39:07 -0700 [thread overview]
Message-ID: <d4939e4c-4e31-4330-0180-8c3c73378d24@linaro.org> (raw)
In-Reply-To: <20190509064716.pcxsg3lbbfqv5ltl@sirius.home.kraxel.org>
On 5/8/19 11:47 PM, Gerd Hoffmann wrote:
> So, from looking at the patch it seems you need two mappings of the same
> page, one writable and one executable.
>
> Or, maybe it is also possible with one mapping which is writable first
> when you fill it with code, then gets flipped over to executable when
> you are done with the initialization and want use it.
>
> Is that correct?
That's certainly the way I read that patch.
> I suspect supporting that in tcg isn't exactly trivial.
It shouldn't be too hard, if required. All of the writing to the buffer is
isolated to a couple of inline functions.
I do wonder if using paxctl -m as a part of the build process for affected *BSD
isn't just as easy?
r~
next prev parent reply other threads:[~2019-05-09 16:40 UTC|newest]
Thread overview: 34+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-05-08 8:56 [Qemu-devel] [PATCH 00/13] tests/vm: serial console autoinstall, misc fixes Gerd Hoffmann
2019-05-08 8:56 ` [Qemu-devel] [PATCH 01/13] scripts: use git archive in archive-source Gerd Hoffmann
2019-05-08 8:56 ` [Qemu-devel] [PATCH 02/13] tests/vm: send proxy environment variables over ssh Gerd Hoffmann
2019-05-08 8:56 ` [Qemu-devel] [PATCH 03/13] tests/vm: send locale " Gerd Hoffmann
2019-05-09 7:35 ` Thomas Huth
2019-05-09 8:18 ` Gerd Hoffmann
2019-05-08 8:56 ` [Qemu-devel] [PATCH 04/13] tests/vm: use ssh with pty unconditionally Gerd Hoffmann
2019-05-08 8:56 ` [Qemu-devel] [PATCH 05/13] tests/vm: run test builds on snapshot Gerd Hoffmann
2019-05-08 8:56 ` [Qemu-devel] [PATCH 06/13] tests/vm: add vm-boot-{ssh, serial}-<guest> targets Gerd Hoffmann
2019-05-08 8:56 ` [Qemu-devel] [PATCH 07/13] tests/vm: add DEBUG=1 to help text Gerd Hoffmann
2019-05-08 8:56 ` [Qemu-devel] [PATCH 08/13] tests/vm: serial console support helpers Gerd Hoffmann
2019-05-08 8:56 ` [Qemu-devel] [PATCH 09/13] tests/vm: openbsd autoinstall, using serial console Gerd Hoffmann
2019-05-08 8:56 ` [Qemu-devel] [PATCH 10/13] tests/vm: freebsd " Gerd Hoffmann
2019-05-08 8:56 ` [Qemu-devel] [PATCH 11/13] tests/vm: netbsd " Gerd Hoffmann
2019-05-08 19:30 ` Kamil Rytarowski
2019-05-09 6:47 ` Gerd Hoffmann
2019-05-09 16:39 ` Richard Henderson [this message]
2019-05-09 19:07 ` Kamil Rytarowski
2019-05-09 17:01 ` Kamil Rytarowski
2019-05-08 8:56 ` [Qemu-devel] [PATCH 12/13] tests/vm: fedora " Gerd Hoffmann
2019-05-09 12:00 ` Thomas Huth
2019-05-09 13:10 ` Gerd Hoffmann
2019-05-09 13:23 ` Daniel P. Berrangé
2019-05-08 8:56 ` [Qemu-devel] [PATCH 13/13] tests/vm: ubuntu.i386: apt proxy setup Gerd Hoffmann
2019-05-09 12:12 ` Philippe Mathieu-Daudé
2019-05-09 13:17 ` Gerd Hoffmann
2019-05-09 11:53 ` [Qemu-devel] [PATCH 00/13] tests/vm: serial console autoinstall, misc fixes Thomas Huth
2019-05-09 12:04 ` Philippe Mathieu-Daudé
2019-05-09 12:35 ` Thomas Huth
2019-05-09 13:50 ` Gerd Hoffmann
2019-05-09 13:57 ` Thomas Huth
2019-05-09 19:11 ` Kamil Rytarowski
2019-05-09 18:52 ` Kamil Rytarowski
2019-05-10 4:23 ` Gerd Hoffmann
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