From: Feng Wu <feng.wu@intel.com>
To: joro@8bytes.org, dwmw2@infradead.org
Cc: tglx@linutronix.de, jiang.liu@linux.intel.com,
iommu@lists.linux-foundation.org, linux-kernel@vger.kernel.org,
Feng Wu <feng.wu@intel.com>
Subject: [v7 8/8] iommu, x86: Properly handler PI for IOMMU hotplug
Date: Mon, 25 May 2015 13:28:54 +0800 [thread overview]
Message-ID: <1432531734-25978-9-git-send-email-feng.wu@intel.com> (raw)
In-Reply-To: <1432531734-25978-1-git-send-email-feng.wu@intel.com>
Return error when inserting a new IOMMU which doesn't support PI
if PI is currently in use.
Signed-off-by: Feng Wu <feng.wu@intel.com>
---
drivers/iommu/intel_irq_remapping.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/drivers/iommu/intel_irq_remapping.c b/drivers/iommu/intel_irq_remapping.c
index 9f7f378..79ca56e 100644
--- a/drivers/iommu/intel_irq_remapping.c
+++ b/drivers/iommu/intel_irq_remapping.c
@@ -1354,6 +1354,9 @@ int dmar_ir_hotplug(struct dmar_drhd_unit *dmaru, bool insert)
return -EINVAL;
if (!ecap_ir_support(iommu->ecap))
return 0;
+ if (irq_remapping_cap(IRQ_POSTING_CAP) &&
+ !cap_pi_support(iommu->cap))
+ return -EBUSY;
if (insert) {
if (!iommu->ir_table)
--
2.1.0
prev parent reply other threads:[~2015-05-25 5:38 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-05-25 5:28 [v7 0/8] Add VT-d Posted-Interrupts support - IOMMU part Feng Wu
2015-05-25 5:28 ` [v7 1/8] iommu: Add new member capability to struct irq_remap_ops Feng Wu
2015-05-25 5:28 ` [v7 2/8] iommu: dmar: Extend struct irte for VT-d Posted-Interrupts Feng Wu
2015-05-25 5:28 ` [v7 3/8] iommu, x86: Implement irq_set_vcpu_affinity for intel_ir_chip Feng Wu
2015-05-25 5:28 ` [v7 4/8] iommu, x86: No need to migrating irq for VT-d Posted-Interrupts Feng Wu
2015-05-25 8:38 ` Thomas Gleixner
2015-05-26 2:53 ` Wu, Feng
2015-05-26 10:00 ` Thomas Gleixner
2015-05-26 13:59 ` Wu, Feng
2015-05-25 5:28 ` [v7 5/8] iommu, x86: Add cap_pi_support() to detect VT-d PI capability Feng Wu
2015-05-25 5:28 ` [v7 6/8] iommu, x86: Setup Posted-Interrupts capability for Intel iommu Feng Wu
2015-05-25 5:28 ` [v7 7/8] iommu, x86: define irq_remapping_cap() Feng Wu
2015-05-25 5:28 ` Feng Wu [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=1432531734-25978-9-git-send-email-feng.wu@intel.com \
--to=feng.wu@intel.com \
--cc=dwmw2@infradead.org \
--cc=iommu@lists.linux-foundation.org \
--cc=jiang.liu@linux.intel.com \
--cc=joro@8bytes.org \
--cc=linux-kernel@vger.kernel.org \
--cc=tglx@linutronix.de \
/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
all inboxes | Powered by JetHome®