From: Aurelien Jarno <aurelien-rXXEIb44qovR7s880joybQ@public.gmane.org>
To: kvm-devel-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org
Subject: [PATCH]: KVM: Fix cmpxchg for writeback changes
Date: Wed, 25 Jul 2007 11:25:06 +0200 [thread overview]
Message-ID: <20070725092506.GA19697@hall.aurel32.net> (raw)
KVM: Fix writeback for cmpxchg instruction
The writeback fixes (02c03a326a5df825cc01de426f72e160db2b9538) broke
cmpxchg emulation. The patch below fixes that.
Signed-off-by: Aurelien Jarno <aurelien-rXXEIb44qovR7s880joybQ@public.gmane.org>
diff --git a/drivers/kvm/x86_emulate.c b/drivers/kvm/x86_emulate.c
index 21ce977..9d30d10 100644
--- a/drivers/kvm/x86_emulate.c
+++ b/drivers/kvm/x86_emulate.c
@@ -1275,7 +1275,7 @@ twobyte_insn:
src.val = _regs[VCPU_REGS_RAX];
emulate_2op_SrcV("cmp", src, dst, _eflags);
/* Always write back. The question is: where to? */
- d |= Mov;
+ no_wb = 0;
if (_eflags & EFLG_ZF) {
/* Success: write back to memory. */
dst.val = src.orig_val;
--
.''`. Aurelien Jarno | GPG: 1024D/F1BCDB73
: :' : Debian developer | Electrical Engineer
`. `' aurel32-8fiUuRrzOP0dnm+yROfE0A@public.gmane.org | aurelien-rXXEIb44qovR7s880joybQ@public.gmane.org
`- people.debian.org/~aurel32 | www.aurel32.net
-------------------------------------------------------------------------
This SF.net email is sponsored by: Splunk Inc.
Still grepping through log files to find problems? Stop.
Now Search log events and configuration files using AJAX and a browser.
Download your FREE copy of Splunk now >> http://get.splunk.com/
next reply other threads:[~2007-07-25 9:25 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-07-25 9:25 Aurelien Jarno [this message]
[not found] ` <20070725092506.GA19697-OqXK5JiLQY5aJl8KAwiEcA@public.gmane.org>
2007-07-25 9:34 ` [PATCH]: KVM: Fix cmpxchg for writeback changes Avi Kivity
[not found] ` <46A7190A.3080500-atKUWr5tajBWk0Htik3J/w@public.gmane.org>
2007-07-25 9:41 ` Aurelien Jarno
[not found] ` <20070725094157.GA20665-OqXK5JiLQY5aJl8KAwiEcA@public.gmane.org>
2007-07-25 9:54 ` Avi Kivity
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=20070725092506.GA19697@hall.aurel32.net \
--to=aurelien-rxxeib44qovr7s880joybq@public.gmane.org \
--cc=kvm-devel-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org \
/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