From: Feng Wu <feng.wu@intel.com>
To: xen-devel@lists.xen.org
Cc: kevin.tian@intel.com, Feng Wu <feng.wu@intel.com>,
george.dunlap@eu.citrix.com, andrew.cooper3@citrix.com,
dario.faggioli@citrix.com, jbeulich@suse.com
Subject: [PATCH v3 4/6] Pause/Unpause the domain before/after assigning PI hooks
Date: Wed, 31 Aug 2016 11:56:29 +0800 [thread overview]
Message-ID: <1472615791-8664-5-git-send-email-feng.wu@intel.com> (raw)
In-Reply-To: <1472615791-8664-1-git-send-email-feng.wu@intel.com>
Pausing the domain can make sure the vCPU is not running and
hence calling the hooks simultaneously when deassigning the
PI hooks. This makes sure that all the appropriate state of
PI descriptor is actually set up for all vCPus before leaving
this function.
Signed-off-by: Feng Wu <feng.wu@intel.com>
---
xen/arch/x86/hvm/vmx/vmx.c | 11 +++++++++++
1 file changed, 11 insertions(+)
diff --git a/xen/arch/x86/hvm/vmx/vmx.c b/xen/arch/x86/hvm/vmx/vmx.c
index 37fa2f1..071c063 100644
--- a/xen/arch/x86/hvm/vmx/vmx.c
+++ b/xen/arch/x86/hvm/vmx/vmx.c
@@ -219,8 +219,19 @@ void vmx_pi_hooks_assign(struct domain *d)
ASSERT(!d->arch.hvm_domain.vmx.vcpu_block);
+ /*
+ * Pausing the domain can make sure the vCPU is not
+ * running and hence calling the hooks simultaneously
+ * when deassigning the PI hooks. This makes sure that
+ * all the appropriate state of PI descriptor is actually
+ * set up for all vCPus before leaving this function.
+ */
+ domain_pause(d);
+
d->arch.hvm_domain.vmx.vcpu_block = vmx_vcpu_block;
d->arch.hvm_domain.vmx.pi_do_resume = vmx_pi_do_resume;
+
+ domain_unpause(d);
}
/* This function is called when pcidevs_lock is held */
--
2.1.0
_______________________________________________
Xen-devel mailing list
Xen-devel@lists.xen.org
https://lists.xen.org/xen-devel
next prev parent reply other threads:[~2016-08-31 3:56 UTC|newest]
Thread overview: 50+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-08-31 3:56 [PATCH v3 0/6] VMX: Properly handle pi descriptor and per-cpu blocking list Feng Wu
2016-08-31 3:56 ` [PATCH v3 1/6] VMX: Statically assign two PI hooks Feng Wu
2016-09-01 8:16 ` Jan Beulich
2016-09-01 9:13 ` Wu, Feng
2016-09-01 9:23 ` Jan Beulich
2016-09-01 9:38 ` Wu, Feng
2016-09-06 8:42 ` Dario Faggioli
2016-09-06 9:53 ` Wu, Feng
2016-08-31 3:56 ` [PATCH v3 2/6] VMX: Properly handle pi when all the assigned devices are removed Feng Wu
2016-09-01 8:21 ` Jan Beulich
2016-09-01 9:22 ` Wu, Feng
2016-09-01 10:23 ` Jan Beulich
2016-09-01 13:12 ` Wu, Feng
2016-09-06 8:58 ` Dario Faggioli
2016-08-31 3:56 ` [PATCH v3 3/6] VMX: Cleanup PI per-cpu blocking list when vcpu is destroyed Feng Wu
2016-09-06 9:21 ` Dario Faggioli
2016-09-06 23:27 ` Wu, Feng
2016-08-31 3:56 ` Feng Wu [this message]
2016-09-01 8:29 ` [PATCH v3 4/6] Pause/Unpause the domain before/after assigning PI hooks Jan Beulich
2016-09-02 1:46 ` Wu, Feng
2016-09-02 7:04 ` Jan Beulich
2016-09-02 7:31 ` Wu, Feng
2016-09-02 8:16 ` Jan Beulich
2016-09-02 8:40 ` Wu, Feng
2016-09-02 9:25 ` Jan Beulich
2016-09-02 10:30 ` Wu, Feng
2016-09-02 10:45 ` Jan Beulich
2016-09-02 13:15 ` Wu, Feng
2016-09-02 13:54 ` Jan Beulich
2016-09-05 3:11 ` Wu, Feng
2016-09-05 9:27 ` Jan Beulich
2016-09-14 2:23 ` Wu, Feng
2016-09-14 8:46 ` Jan Beulich
2016-09-14 14:51 ` Dario Faggioli
2016-09-18 8:37 ` Wu, Feng
2016-09-19 23:12 ` Dario Faggioli
2016-09-20 0:48 ` Wu, Feng
2016-09-20 7:31 ` Jan Beulich
2016-09-20 7:53 ` Wu, Feng
2016-09-20 8:13 ` Dario Faggioli
2016-09-20 8:18 ` Wu, Feng
2016-09-23 14:19 ` Jan Beulich
2016-09-26 2:53 ` Wu, Feng
2016-08-31 3:56 ` [PATCH v3 5/6] VT-d: No need to set irq affinity for posted format IRTE Feng Wu
2016-09-01 8:38 ` Jan Beulich
2016-09-02 1:58 ` Wu, Feng
2016-08-31 3:56 ` [PATCH v3 6/6] VMX: Fixup PI descritpor when cpu is offline Feng Wu
2016-09-01 8:48 ` Jan Beulich
2016-09-02 3:25 ` Wu, Feng
2016-09-02 7:08 ` Jan Beulich
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=1472615791-8664-5-git-send-email-feng.wu@intel.com \
--to=feng.wu@intel.com \
--cc=andrew.cooper3@citrix.com \
--cc=dario.faggioli@citrix.com \
--cc=george.dunlap@eu.citrix.com \
--cc=jbeulich@suse.com \
--cc=kevin.tian@intel.com \
--cc=xen-devel@lists.xen.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;
as well as URLs for NNTP newsgroup(s).