linux-pci.vger.kernel.org archive mirror
 help / color / mirror / Atom feed
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>,
	Lu Baolu <baolu.lu@linux.intel.com>,
	Joerg Roedel <joro@8bytes.org>,
	Nirmal Patel <nirmal.patel@intel.com>,
	Kapil Karkra <kapil.karkra@intel.com>,
	Krzysztof Wilczynski <kw@linux.com>,
	Jon Derrick <jonathan.derrick@intel.com>,
	Joerg Roedel <jroedel@suse.de>
Subject: [PATCH v4 1/2] iommu/vt-d: Use Real PCI DMA device for IRTE
Date: Wed, 10 Feb 2021 09:13:14 -0700	[thread overview]
Message-ID: <20210210161315.316097-2-jonathan.derrick@intel.com> (raw)
In-Reply-To: <20210210161315.316097-1-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().

Acked-by: Lu Baolu <baolu.lu@linux.intel.com>
Acked-by: Joerg Roedel <jroedel@suse.de>
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:[~2021-02-10 16:14 UTC|newest]

Thread overview: 7+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-02-10 16:13 [PATCH v4 0/2] VMD MSI Remapping Bypass Jon Derrick
2021-02-10 16:13 ` Jon Derrick [this message]
2021-02-10 16:13 ` [PATCH v4 2/2] PCI: vmd: Disable MSI-X remapping when possible Jon Derrick
2021-03-17 19:14 ` [PATCH v4 0/2] VMD MSI Remapping Bypass Derrick, Jonathan
2021-03-18  9:07   ` joro
2021-03-18 12:38     ` Lorenzo Pieralisi
2021-03-22 14:11 ` Lorenzo Pieralisi

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=20210210161315.316097-2-jonathan.derrick@intel.com \
    --to=jonathan.derrick@intel.com \
    --cc=baolu.lu@linux.intel.com \
    --cc=helgaas@kernel.org \
    --cc=iommu@lists.linux-foundation.org \
    --cc=joro@8bytes.org \
    --cc=jroedel@suse.de \
    --cc=kapil.karkra@intel.com \
    --cc=kw@linux.com \
    --cc=linux-pci@vger.kernel.org \
    --cc=lorenzo.pieralisi@arm.com \
    --cc=nirmal.patel@intel.com \
    --subject='Re: [PATCH v4 1/2] iommu/vt-d: Use Real PCI DMA device for IRTE' \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link

This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).