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From: Jon Derrick <jonathan.derrick@intel.com>
To: <linux-pci@vger.kernel.org>,
	Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Cc: Bjorn Helgaas <helgaas@kernel.org>,
	Christoph Hellwig <hch@lst.de>,
	Andrzej Jakowski <andrzej.jakowski@linux.intel.com>,
	Sushma Kalakota <sushmax.kalakota@intel.com>,
	<linux-kernel@vger.kernel.org>, <x86@kernel.org>,
	Jon Derrick <jonathan.derrick@intel.com>,
	Andy Shevchenko <andriy.shevchenko@intel.com>
Subject: [PATCH 5/6] x86/apic/msi: Use Real PCI DMA device when configuring IRTE
Date: Tue, 28 Jul 2020 13:49:44 -0600
Message-ID: <20200728194945.14126-6-jonathan.derrick@intel.com> (raw)
In-Reply-To: <20200728194945.14126-1-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().

Reviewed-by: Andy Shevchenko <andriy.shevchenko@intel.com>
Signed-off-by: Jon Derrick <jonathan.derrick@intel.com>
---
 arch/x86/kernel/apic/msi.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/x86/kernel/apic/msi.c b/arch/x86/kernel/apic/msi.c
index c2b2911feeef..7ca271b8d891 100644
--- a/arch/x86/kernel/apic/msi.c
+++ b/arch/x86/kernel/apic/msi.c
@@ -189,7 +189,7 @@ int native_setup_msi_irqs(struct pci_dev *dev, int nvec, int type)
 
 	init_irq_alloc_info(&info, NULL);
 	info.type = X86_IRQ_ALLOC_TYPE_MSI;
-	info.msi_dev = dev;
+	info.msi_dev = pci_real_dma_dev(dev);
 
 	domain = irq_remapping_get_irq_domain(&info);
 	if (domain == NULL)
-- 
2.27.0


  parent reply index

Thread overview: 7+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-07-28 19:49 [PATCH 0/6] VMD MSI Remapping Bypass Jon Derrick
2020-07-28 19:49 ` [PATCH 1/6] PCI: vmd: Create physical offset helper Jon Derrick
2020-07-28 19:49 ` [PATCH 2/6] PCI: vmd: Create bus offset configuration helper Jon Derrick
2020-07-28 19:49 ` [PATCH 3/6] PCI: vmd: Create IRQ Domain " Jon Derrick
2020-07-28 19:49 ` [PATCH 4/6] PCI: vmd: Create IRQ allocation helper Jon Derrick
2020-07-28 19:49 ` Jon Derrick [this message]
2020-07-28 19:49 ` [PATCH 6/6] PCI: vmd: Disable MSI/X remapping when possible Jon Derrick

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