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From: Feng Wu <feng.wu@intel.com>
To: dwmw2@infradead.org, joro@8bytes.org
Cc: jiang.liu@linux.intel.com, iommu@lists.linux-foundation.org,
	linux-kernel@vger.kernel.org, Feng Wu <feng.wu@intel.com>
Subject: [v4 8/8] iommu, x86: Properly handler PI for IOMMU hotplug
Date: Mon,  2 Feb 2015 16:07:04 +0800	[thread overview]
Message-ID: <1422864424-19411-9-git-send-email-feng.wu@intel.com> (raw)
In-Reply-To: <1422864424-19411-1-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 files changed, 3 insertions(+), 0 deletions(-)

diff --git a/drivers/iommu/intel_irq_remapping.c b/drivers/iommu/intel_irq_remapping.c
index 130a92b..0c2c317 100644
--- a/drivers/iommu/intel_irq_remapping.c
+++ b/drivers/iommu/intel_irq_remapping.c
@@ -1339,6 +1339,9 @@ 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)
-- 
1.7.1


  parent reply	other threads:[~2015-02-02  8:19 UTC|newest]

Thread overview: 17+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2015-02-02  8:06 [v4 0/8] Add VT-d Posted-Interrupts support - IOMMU part Feng Wu
2015-02-02  8:06 ` [v4 1/8] iommu: Add new member capability to struct irq_remap_ops Feng Wu
2015-02-02  8:06 ` [v4 2/8] iommu, x86: Define new irte structure for VT-d Posted-Interrupts Feng Wu
2015-03-23 11:57   ` Joerg Roedel
2015-03-24  2:32     ` Wu, Feng
2015-03-31 15:16       ` Joerg Roedel
2015-04-01  8:51         ` Wu, Feng
2015-02-02  8:06 ` [v4 3/8] iommu, x86: Implement irq_set_vcpu_affinity for intel_ir_chip Feng Wu
2015-02-02  8:07 ` [v4 4/8] iommu, x86: No need to migrating irq for VT-d Posted-Interrupts Feng Wu
2015-02-02  8:07 ` [v4 5/8] iommu, x86: Add cap_pi_support() to detect VT-d PI capability Feng Wu
2015-02-02  8:07 ` [v4 6/8] iommu, x86: Setup Posted-Interrupts capability for Intel iommu Feng Wu
2015-02-02  8:07 ` [v4 7/8] iommu, x86: define irq_remapping_cap() Feng Wu
2015-02-02  8:07 ` Feng Wu [this message]
2015-04-02 11:28 ` [v4 0/8] Add VT-d Posted-Interrupts support - IOMMU part Joerg Roedel
2015-04-03  8:12   ` Li, ZhenHua
2015-04-07  5:02     ` Wu, Feng
  -- strict thread matches above, loose matches on Subject: below --
2015-02-02  8:01 Feng Wu
2015-02-02  8:01 ` [v4 8/8] iommu, x86: Properly handler PI for IOMMU hotplug Feng Wu

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