From: Avi Kivity <avi@redhat.com>
To: David Gibson <dwg@au1.ibm.com>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>,
Marcelo Tosatti <mtosatti@redhat.com>,
kvm@vger.kernel.org, Alexander Graf <agraf@suse.de>,
Paul Mackerras <paulus@au1.ibm.com>,
kvm-ppc@vger.kernel.org
Subject: Re: Reset problem vs. MMIO emulation, hypercalls, etc...
Date: Wed, 08 Aug 2012 12:42:02 +0000 [thread overview]
Message-ID: <50225E9A.4070808@redhat.com> (raw)
In-Reply-To: <20120808115943.GU16664@truffala.fritz.box>
On 08/08/2012 02:59 PM, David Gibson wrote:
>>
>> No, you're correct. HLT could have been emulated in userspace, it just
>> wasn't. The correct statement is that HLT was arbitrarily chosen to be
>> emulated in userspace with the synchronous model, but the asynchronous
>> model forced it into the kernel.
>
> Aha! Ok, understood. Uh, assuming you meant kernelspace, not
> userspace in the first line there, anyway.
I did.
> Ok, so I am now reassured
> that our current handling of CEDE in kernelspace does not cause
> problems.
Great. It's a real pity the original local APIC implementation was in
userspace, it causes no end of confusion, and in fact was broken for smp
until recently even though it is 7 years old.
--
error compiling committee.c: too many arguments to function
prev parent reply other threads:[~2012-08-08 12:42 UTC|newest]
Thread overview: 31+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-08-01 3:17 Reset problem vs. MMIO emulation, hypercalls, etc Benjamin Herrenschmidt
2012-08-02 10:46 ` Alexander Graf
2012-08-02 12:22 ` Benjamin Herrenschmidt
2012-08-02 12:35 ` Avi Kivity
2012-08-02 12:59 ` Alexander Graf
2012-08-02 13:05 ` Avi Kivity
2012-08-02 20:29 ` Benjamin Herrenschmidt
2012-08-05 8:55 ` Avi Kivity
2012-08-05 20:45 ` Benjamin Herrenschmidt
2012-08-02 20:20 ` Benjamin Herrenschmidt
2012-08-03 17:41 ` Marcelo Tosatti
2012-08-03 18:05 ` Marcelo Tosatti
2012-08-03 22:32 ` Benjamin Herrenschmidt
2012-08-05 9:00 ` Avi Kivity
2012-08-06 20:25 ` Scott Wood
2012-08-07 8:44 ` Avi Kivity
2012-08-06 20:54 ` Benjamin Herrenschmidt
2012-08-03 22:30 ` Benjamin Herrenschmidt
2012-08-06 3:13 ` David Gibson
2012-08-06 20:57 ` Benjamin Herrenschmidt
2012-08-07 1:32 ` David Gibson
2012-08-07 8:46 ` Avi Kivity
2012-08-07 12:14 ` David Gibson
2012-08-07 13:13 ` Avi Kivity
2012-08-07 21:09 ` Benjamin Herrenschmidt
2012-08-08 8:52 ` Avi Kivity
2012-08-08 9:27 ` Benjamin Herrenschmidt
2012-08-08 0:49 ` David Gibson
2012-08-08 8:58 ` Avi Kivity
2012-08-08 11:59 ` David Gibson
2012-08-08 12:42 ` Avi Kivity [this message]
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=50225E9A.4070808@redhat.com \
--to=avi@redhat.com \
--cc=agraf@suse.de \
--cc=benh@kernel.crashing.org \
--cc=dwg@au1.ibm.com \
--cc=kvm-ppc@vger.kernel.org \
--cc=kvm@vger.kernel.org \
--cc=mtosatti@redhat.com \
--cc=paulus@au1.ibm.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 a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox