From: Feng Wu <feng.wu@intel.com>
To: dwmw2@infradead.org, joro@8bytes.or
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 16:01:54 +0800 [thread overview]
Message-ID: <1422864114-19324-9-git-send-email-feng.wu@intel.com> (raw)
In-Reply-To: <1422864114-19324-1-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
next prev parent reply other threads:[~2015-02-02 8:14 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-02-02 8:01 [v4 0/8] Add VT-d Posted-Interrupts support - IOMMU part Feng Wu
2015-02-02 8:01 ` [v4 1/8] iommu: Add new member capability to struct irq_remap_ops Feng Wu
2015-02-02 8:01 ` [v4 2/8] iommu, x86: Define new irte structure for VT-d Posted-Interrupts Feng Wu
2015-02-02 8:01 ` [v4 3/8] iommu, x86: Implement irq_set_vcpu_affinity for intel_ir_chip Feng Wu
2015-02-02 8:01 ` [v4 4/8] iommu, x86: No need to migrating irq for VT-d Posted-Interrupts Feng Wu
2015-02-02 8:01 ` [v4 5/8] iommu, x86: Add cap_pi_support() to detect VT-d PI capability Feng Wu
2015-02-02 8:01 ` [v4 6/8] iommu, x86: Setup Posted-Interrupts capability for Intel iommu Feng Wu
2015-02-02 8:01 ` [v4 7/8] iommu, x86: define irq_remapping_cap() Feng Wu
2015-02-02 8:01 ` Feng Wu [this message]
2015-02-02 8:17 ` [v4 0/8] Add VT-d Posted-Interrupts support - IOMMU part Wu, Feng
2015-02-02 8:06 Feng Wu
2015-02-02 8:07 ` [v4 8/8] iommu, x86: Properly handler PI for IOMMU hotplug Feng Wu
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