From: Alexander Graf <agraf@suse.de>
To: Thomas Monjalon <thomas.monjalon@openwide.fr>
Cc: Bug 608107 <608107@bugs.launchpad.net>, qemu-devel@nongnu.org
Subject: Re: [Qemu-devel] [PATCH] target-ppc: clear MSR_POW on interrupt
Date: Fri, 10 Sep 2010 15:02:41 +0200 [thread overview]
Message-ID: <4C8A2C71.6040604@suse.de> (raw)
In-Reply-To: <201009101432.06340.thomas.monjalon@openwide.fr>
Thomas Monjalon wrote:
> From: till <608107@bugs.launchpad.net>
>
> According to FreeScale's 'Programming Environments Manual for 32-bit
> Implementations of the PowerPC Architecture' [MPCFPE32B, Rev.3, 9/2005],
> section 6.5, table 6-7, an interrupt resets MSR_POW to zero but qemu-0.12.4
> fails to do so.
> Resetting the bit is necessary in order to bring the processor out of power
> management since otherwise it goes to sleep right away in the exception
> handler, i.e., it is impossible to leave PM-mode.
>
This doesn't look right. POW shouldn't even get stored in SRR1. Could
you please redo the patch and make sure that mtmsr masks out MSR_POW?
Alex
next prev parent reply other threads:[~2010-09-10 13:02 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-07-21 8:53 [Qemu-devel] [Bug 608107] [NEW] ppc fails to clear MSR_POW when incurring exception till
2010-07-21 8:53 ` [Qemu-devel] [Bug 608107] " till
2010-09-10 12:32 ` [Qemu-devel] [PATCH] target-ppc: clear MSR_POW on interrupt Thomas Monjalon
2010-09-10 13:02 ` Alexander Graf [this message]
2010-09-10 15:03 ` Thomas Monjalon
2010-09-10 15:26 ` Alexander Graf
2010-09-10 15:46 ` Thomas Monjalon
2010-09-10 15:50 ` Alexander Graf
2010-09-10 16:08 ` Edgar E. Iglesias
2010-09-10 16:35 ` Alexander Graf
2010-09-10 16:58 ` Thomas Monjalon
2010-09-10 19:57 ` Edgar E. Iglesias
2010-09-10 23:10 ` Alexander Graf
2010-09-10 9:22 ` [Qemu-devel] [Bug 608107] Re: ppc fails to clear MSR_POW when incurring exception Thomas Monjalon
2010-09-13 13:02 ` till
2012-08-03 2:56 ` Samuel Bronson
2016-10-31 9:11 ` Thomas Huth
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=4C8A2C71.6040604@suse.de \
--to=agraf@suse.de \
--cc=608107@bugs.launchpad.net \
--cc=qemu-devel@nongnu.org \
--cc=thomas.monjalon@openwide.fr \
/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.