diff mbox series

[v2,1/2] iommu/vt-d: Use Real PCI DMA device for IRTE

Message ID 20210204190906.38515-2-jonathan.derrick@intel.com
State New
Headers show
Series VMD MSI Remapping Bypass | expand

Commit Message

Jon Derrick Feb. 4, 2021, 7:09 p.m. UTC
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(-)

Comments

Lu Baolu Feb. 5, 2021, 1:39 a.m. UTC | #1
On 2/5/21 3:09 AM, Jon Derrick wrote:
> 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);
> 

Acked-by: Lu Baolu <baolu.lu@linux.intel.com>

Best regards,
baolu
diff mbox series

Patch

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);