leandrof/linux
1
0
Fork 0
forked from Minki/linux
Code Issues Pull Requests Packages Projects Releases Wiki Activity

iommm/amd: Store irq domain in struct device

Browse Source 
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
This commit is contained in:
Thomas Gleixner 2020-08-26 13:17:00 +02:00
parent 85a8dfc57a
commit 2b2c6aa638
1 changed files with 16 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

17
drivers/iommu/amd/iommu.c
View File

@ -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 \ #define AMD_IOMMU_INT_MASK \
(MMIO_STATUS_EVT_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_dev = ERR_PTR(ret);
iommu_ignore_device(dev); iommu_ignore_device(dev);
} else { } else {
amd_iommu_set_pci_msi_domain(dev, iommu);
iommu_dev = &iommu->iommu; iommu_dev = &iommu->iommu;
} }