From: Benjamin Herrenschmidt <benh@kernel.crashing.org>
To: Paolo Bonzini <pbonzini@redhat.com>
Cc: "Peter Maydell" <peter.maydell@linaro.org>,
"Stefan Hajnoczi" <stefanha@redhat.com>,
"QEMU Developers" <qemu-devel@nongnu.org>,
"Markus Armbruster" <armbru@redhat.com>,
"Alexander Graf" <agraf@suse.de>,
"qemu-ppc@nongnu.org" <qemu-ppc@nongnu.org>,
"Alex Bligh" <alex@alex.org.uk>,
"Cornelia Huck" <cornelia.huck@de.ibm.com>,
"Luiz Capitulino" <lcapitulino@redhat.com>,
"Andreas Färber" <afaerber@suse.de>,
"Richard Henderson" <rth@twiddle.net>
Subject: Re: [Qemu-devel] [Qemu-ppc] [PATCH v3 1/4] cpus: Define NMI callback
Date: Wed, 11 Jun 2014 20:59:55 +1000 [thread overview]
Message-ID: <1402484395.14780.48.camel@pasglop> (raw)
In-Reply-To: <539833C4.5090101@redhat.com>
On Wed, 2014-06-11 at 12:47 +0200, Paolo Bonzini wrote:
> Ok, I can buy removing the support for CPU != 0. But still, the
> overengineering remains.
>
> If Alexey needs to trigger the NMI on all CPUs, simply moving the new
> method from CPU to Machine, and blindly using first_cpu in s390 and x86
> makes the most sense.
I can imagine a future where we would want to programatically trigger the
sreset (the NMI is basically a soft reset for us) on a specific target CPU
so it does make some sense to have a per CPU method and have the monitor
"nmi" command call it on all of them. But it's not a huge deal if you decide
to just make it as machine for now.
This is more than just a "debug" feature however, it is generally used to
trigger kdump on crashed partitions (this feature is called "dump" in pHyp).
Cheers,
Ben.
next prev parent reply other threads:[~2014-06-11 11:00 UTC|newest]
Thread overview: 47+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-06-04 8:08 [Qemu-devel] [PATCH v3 0/4] cpus: Add generic NMI support Alexey Kardashevskiy
2014-06-04 8:08 ` [Qemu-devel] [PATCH v3 1/4] cpus: Define NMI callback Alexey Kardashevskiy
2014-06-10 13:39 ` Luiz Capitulino
2014-06-10 14:41 ` Cornelia Huck
2014-06-10 14:48 ` Luiz Capitulino
2014-06-10 16:29 ` Paolo Bonzini
2014-06-10 18:09 ` Alexander Graf
2014-06-11 0:12 ` Alexey Kardashevskiy
2014-06-11 0:21 ` Alexander Graf
2014-06-11 0:23 ` Peter Maydell
2014-06-11 0:28 ` Alexander Graf
2014-06-11 4:59 ` Paolo Bonzini
2014-06-11 8:01 ` Alexander Graf
2014-06-11 8:27 ` Paolo Bonzini
2014-06-11 8:29 ` Alexander Graf
2014-06-11 8:37 ` Paolo Bonzini
2014-06-11 8:42 ` Alexander Graf
2014-06-11 10:47 ` Paolo Bonzini
2014-06-11 10:59 ` Benjamin Herrenschmidt [this message]
2014-06-11 12:04 ` Alexander Graf
2014-06-11 9:04 ` Alexey Kardashevskiy
2014-06-11 9:19 ` Alexander Graf
2014-06-11 13:10 ` Luiz Capitulino
2014-06-11 13:36 ` Cornelia Huck
2014-06-11 13:42 ` Luiz Capitulino
2014-06-11 6:50 ` Alexey Kardashevskiy
2014-06-11 7:57 ` Paolo Bonzini
2014-06-11 8:38 ` Cornelia Huck
2014-06-11 9:18 ` Cornelia Huck
2014-06-10 15:13 ` Eric Blake
2014-06-10 15:40 ` Alexey Kardashevskiy
2014-06-11 12:50 ` Luiz Capitulino
2014-06-04 8:08 ` [Qemu-devel] [PATCH v3 2/4] target-s390x: Migrate to new nmi() CPU callback Alexey Kardashevskiy
2014-06-04 8:08 ` [Qemu-devel] [PATCH v3 3/4] target-i386: " Alexey Kardashevskiy
2014-06-04 8:08 ` [Qemu-devel] [PATCH v3 4/4] target-ppc: Add support for " Alexey Kardashevskiy
2014-06-04 9:11 ` [Qemu-devel] [PATCH v3 0/4] cpus: Add generic NMI support Paolo Bonzini
2014-06-04 9:16 ` Peter Maydell
2014-06-04 9:30 ` Alexey Kardashevskiy
2014-06-04 9:33 ` Peter Maydell
2014-06-04 9:38 ` Alexander Graf
2014-06-04 9:39 ` Alexey Kardashevskiy
2014-06-04 9:39 ` Paolo Bonzini
2014-06-04 9:47 ` Peter Maydell
2014-06-04 9:50 ` Alexander Graf
2014-06-04 10:44 ` [Qemu-devel] [Qemu-ppc] " Greg Kurz
2014-06-04 10:51 ` Cornelia Huck
2014-06-04 11:34 ` [Qemu-devel] " Alexey Kardashevskiy
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=1402484395.14780.48.camel@pasglop \
--to=benh@kernel.crashing.org \
--cc=afaerber@suse.de \
--cc=agraf@suse.de \
--cc=alex@alex.org.uk \
--cc=armbru@redhat.com \
--cc=cornelia.huck@de.ibm.com \
--cc=lcapitulino@redhat.com \
--cc=pbonzini@redhat.com \
--cc=peter.maydell@linaro.org \
--cc=qemu-devel@nongnu.org \
--cc=qemu-ppc@nongnu.org \
--cc=rth@twiddle.net \
--cc=stefanha@redhat.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.