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Subject: [PATCH v3 02/18] iommu/vt-d: Add DEV-MSI support
From:   Dave Jiang <dave.jiang@intel.com>
To:     vkoul@kernel.org, megha.dey@intel.com, maz@kernel.org,
        bhelgaas@google.com, tglx@linutronix.de,
        alex.williamson@redhat.com, jacob.jun.pan@intel.com,
        ashok.raj@intel.com, jgg@mellanox.com, yi.l.liu@intel.com,
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        shahafs@mellanox.com, yan.y.zhao@linux.intel.com,
        pbonzini@redhat.com, samuel.ortiz@intel.com, mona.hossain@intel.com
Cc:     dmaengine@vger.kernel.org, linux-kernel@vger.kernel.org,
        x86@kernel.org, linux-pci@vger.kernel.org, kvm@vger.kernel.org
Date:   Tue, 15 Sep 2020 16:27:49 -0700
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From: Megha Dey <megha.dey@intel.com>

Add required support in the interrupt remapping driver for devices
which generate dev-msi interrupts and use the intel remapping
domain as the parent domain.

Signed-off-by: Megha Dey <megha.dey@intel.com>
Signed-off-by: Dave Jiang <dave.jiang@intel.com>
Reviewed-by: Ashok Raj <ashok.raj@intel.com>
---
 drivers/iommu/intel/irq_remapping.c |    6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/drivers/iommu/intel/irq_remapping.c b/drivers/iommu/intel/irq_remapping.c
index 0cfce1d3b7bb..75e388263b78 100644
--- a/drivers/iommu/intel/irq_remapping.c
+++ b/drivers/iommu/intel/irq_remapping.c
@@ -1303,9 +1303,10 @@ static void intel_irq_remapping_prepare_irte(struct intel_ir_data *data,
 	case X86_IRQ_ALLOC_TYPE_HPET:
 	case X86_IRQ_ALLOC_TYPE_PCI_MSI:
 	case X86_IRQ_ALLOC_TYPE_PCI_MSIX:
+	case X86_IRQ_ALLOC_TYPE_DEV_MSI:
 		if (info->type == X86_IRQ_ALLOC_TYPE_HPET)
 			set_hpet_sid(irte, info->devid);
-		else
+		else if (info->type != X86_IRQ_ALLOC_TYPE_DEV_MSI)
 			set_msi_sid(irte, msi_desc_to_pci_dev(info->desc));
 
 		msg->address_hi = MSI_ADDR_BASE_HI;
@@ -1358,7 +1359,8 @@ static int intel_irq_remapping_alloc(struct irq_domain *domain,
 	if (!info || !iommu)
 		return -EINVAL;
 	if (nr_irqs > 1 && info->type != X86_IRQ_ALLOC_TYPE_PCI_MSI &&
-	    info->type != X86_IRQ_ALLOC_TYPE_PCI_MSIX)
+	    info->type != X86_IRQ_ALLOC_TYPE_PCI_MSIX &&
+	    info->type != X86_IRQ_ALLOC_TYPE_DEV_MSI)
 		return -EINVAL;
 
 	/*