From: Feng Wu <feng.wu-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
To: joro-zLv9SwRftAIdnm+yROfE0A@public.gmane.org,
dwmw2-wEGCiKHe2LqWVfeAwA7xHQ@public.gmane.org
Cc: tglx-hfZtesqFncYOwBW4kG4KsQ@public.gmane.org,
jiang.liu-VuQAYsv1563Yd54FQh9/CA@public.gmane.org,
iommu-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org,
linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
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-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
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-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
---
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 5:28 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
[not found] ` <1432531734-25978-1-git-send-email-feng.wu-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
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
[not found] ` <1432531734-25978-5-git-send-email-feng.wu-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
2015-05-25 8:38 ` Thomas Gleixner
2015-05-26 2:53 ` Wu, Feng
[not found] ` <E959C4978C3B6342920538CF579893F0025519ED-0J0gbvR4kTg/UvCtAeCM4rfspsVTdybXVpNB7YpNyf8@public.gmane.org>
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]
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