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From: Jon Derrick <jonathan.derrick@intel.com>
To: <linux-pci@vger.kernel.org>, <iommu@lists.linux-foundation.org>
Cc: Nirmal Patel <nirmal.patel@intel.com>,
	Will Deacon <will@kernel.org>,
	Kapil Karkra <kapil.karkra@intel.com>,
	Bjorn Helgaas <helgaas@kernel.org>,
	David Woodhouse <dwmw2@infradead.org>,
	Jon Derrick <jonathan.derrick@intel.com>
Subject: [PATCH v2 1/2] iommu/vt-d: Use Real PCI DMA device for IRTE
Date: Thu,  4 Feb 2021 12:09:05 -0700	[thread overview]
Message-ID: <20210204190906.38515-2-jonathan.derrick@intel.com> (raw)
In-Reply-To: <20210204190906.38515-1-jonathan.derrick@intel.com>

VMD retransmits child device MSI/X with the VMD endpoint's requester-id.
In order to support direct interrupt remapping of VMD child devices,
ensure that the IRTE is programmed with the VMD endpoint's requester-id
using pci_real_dma_dev().

Signed-off-by: Jon Derrick <jonathan.derrick@intel.com>
---
 drivers/iommu/intel/irq_remapping.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/iommu/intel/irq_remapping.c b/drivers/iommu/intel/irq_remapping.c
index 685200a5cff0..1939e070eec8 100644
--- a/drivers/iommu/intel/irq_remapping.c
+++ b/drivers/iommu/intel/irq_remapping.c
@@ -1276,7 +1276,8 @@ static void intel_irq_remapping_prepare_irte(struct intel_ir_data *data,
 		break;
 	case X86_IRQ_ALLOC_TYPE_PCI_MSI:
 	case X86_IRQ_ALLOC_TYPE_PCI_MSIX:
-		set_msi_sid(irte, msi_desc_to_pci_dev(info->desc));
+		set_msi_sid(irte,
+			    pci_real_dma_dev(msi_desc_to_pci_dev(info->desc)));
 		break;
 	default:
 		BUG_ON(1);
-- 
2.27.0

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WARNING: multiple messages have this Message-ID (diff)
From: Jon Derrick <jonathan.derrick@intel.com>
To: <linux-pci@vger.kernel.org>, <iommu@lists.linux-foundation.org>
Cc: Bjorn Helgaas <helgaas@kernel.org>,
	Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>,
	David Woodhouse <dwmw2@infradead.org>,
	Lu Baolu <baolu.lu@linux.intel.com>,
	Joerg Roedel <joro@8bytes.org>,
	Nirmal Patel <nirmal.patel@intel.com>,
	Kapil Karkra <kapil.karkra@intel.com>,
	Will Deacon <will@kernel.org>,
	Jon Derrick <jonathan.derrick@intel.com>
Subject: [PATCH v2 1/2] iommu/vt-d: Use Real PCI DMA device for IRTE
Date: Thu,  4 Feb 2021 12:09:05 -0700	[thread overview]
Message-ID: <20210204190906.38515-2-jonathan.derrick@intel.com> (raw)
In-Reply-To: <20210204190906.38515-1-jonathan.derrick@intel.com>

VMD retransmits child device MSI/X with the VMD endpoint's requester-id.
In order to support direct interrupt remapping of VMD child devices,
ensure that the IRTE is programmed with the VMD endpoint's requester-id
using pci_real_dma_dev().

Signed-off-by: Jon Derrick <jonathan.derrick@intel.com>
---
 drivers/iommu/intel/irq_remapping.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/iommu/intel/irq_remapping.c b/drivers/iommu/intel/irq_remapping.c
index 685200a5cff0..1939e070eec8 100644
--- a/drivers/iommu/intel/irq_remapping.c
+++ b/drivers/iommu/intel/irq_remapping.c
@@ -1276,7 +1276,8 @@ static void intel_irq_remapping_prepare_irte(struct intel_ir_data *data,
 		break;
 	case X86_IRQ_ALLOC_TYPE_PCI_MSI:
 	case X86_IRQ_ALLOC_TYPE_PCI_MSIX:
-		set_msi_sid(irte, msi_desc_to_pci_dev(info->desc));
+		set_msi_sid(irte,
+			    pci_real_dma_dev(msi_desc_to_pci_dev(info->desc)));
 		break;
 	default:
 		BUG_ON(1);
-- 
2.27.0


  reply	other threads:[~2021-02-04 19:09 UTC|newest]

Thread overview: 14+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-02-04 19:09 [PATCH v2 0/2] VMD MSI Remapping Bypass Jon Derrick
2021-02-04 19:09 ` Jon Derrick
2021-02-04 19:09 ` Jon Derrick [this message]
2021-02-04 19:09   ` [PATCH v2 1/2] iommu/vt-d: Use Real PCI DMA device for IRTE Jon Derrick
2021-02-05  1:39   ` Lu Baolu
2021-02-05  1:39     ` Lu Baolu
2021-02-04 19:09 ` [PATCH v2 2/2] PCI: vmd: Disable MSI/X remapping when possible Jon Derrick
2021-02-04 19:09   ` Jon Derrick
2021-02-05 21:57   ` Bjorn Helgaas
2021-02-05 21:57     ` Bjorn Helgaas
2021-02-06  2:50     ` Derrick, Jonathan
2021-02-06  2:50       ` Derrick, Jonathan
2021-02-05  8:45 ` [PATCH v2 0/2] VMD MSI Remapping Bypass Joerg Roedel
2021-02-05  8:45   ` Joerg Roedel

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