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
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