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authorThomas Gleixner <tglx@linutronix.de>2020-08-26 13:17:00 +0200
committerThomas Gleixner <tglx@linutronix.de>2020-09-16 16:52:37 +0200
commit2b2c6aa63824c69c112bbe4f937f034c5e606a6c (patch)
tree89bb6394ba2e3d1e3c567430eeb116d755c55f65 /drivers/iommu/amd
parent85a8dfc57a0b96785881735e09a61a0fde911ca4 (diff)
iommm/amd: Store irq domain in struct device
As the next step to make X86 utilize the direct MSI irq domain operations store the irq domain pointer in the device struct when a device is probed. It only overrides the irqdomain of devices which are handled by a regular PCI/MSI irq domain which protects PCI devices behind special busses like VMD which have their own irq domain. No functional change. It just avoids the redirection through arch_*_msi_irqs() and allows the PCI/MSI core to directly invoke the irq domain alloc/free functions instead of having to look up the irq domain for every single MSI interupt. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Acked-by: Joerg Roedel <jroedel@suse.de> Link: https://lore.kernel.org/r/20200826112333.806328762@linutronix.de
Diffstat (limited to 'drivers/iommu/amd')
-rw-r--r--drivers/iommu/amd/iommu.c17
1 files changed, 16 insertions, 1 deletions
diff --git a/drivers/iommu/amd/iommu.c b/drivers/iommu/amd/iommu.c
index bc7bb4ccff1f..a9d8b32a8476 100644
--- a/drivers/iommu/amd/iommu.c
+++ b/drivers/iommu/amd/iommu.c
@@ -729,7 +729,21 @@ static void iommu_poll_ga_log(struct amd_iommu *iommu)
}
}
}
-#endif /* CONFIG_IRQ_REMAP */
+
+static void
+amd_iommu_set_pci_msi_domain(struct device *dev, struct amd_iommu *iommu)
+{
+ if (!irq_remapping_enabled || !dev_is_pci(dev) ||
+ pci_dev_has_special_msi_domain(to_pci_dev(dev)))
+ return;
+
+ dev_set_msi_domain(dev, iommu->msi_domain);
+}
+
+#else /* CONFIG_IRQ_REMAP */
+static inline void
+amd_iommu_set_pci_msi_domain(struct device *dev, struct amd_iommu *iommu) { }
+#endif /* !CONFIG_IRQ_REMAP */
#define AMD_IOMMU_INT_MASK \
(MMIO_STATUS_EVT_INT_MASK | \
@@ -2157,6 +2171,7 @@ static struct iommu_device *amd_iommu_probe_device(struct device *dev)
iommu_dev = ERR_PTR(ret);
iommu_ignore_device(dev);
} else {
+ amd_iommu_set_pci_msi_domain(dev, iommu);
iommu_dev = &iommu->iommu;
}