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| author | Thomas Gleixner <tglx@linutronix.de> | 2020-08-26 13:16:59 +0200 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2020-09-16 16:52:37 +0200 |
| commit | 85a8dfc57a0b96785881735e09a61a0fde911ca4 (patch) | |
| tree | 24472fd2ff397b6144d2fa175efc3aecc37b1fdd /drivers/iommu/intel/dmar.c | |
| parent | 2e4386eba0c0830becc5c88848b765950970533d (diff) | |
| download | linux-85a8dfc57a0b96785881735e09a61a0fde911ca4.tar.bz2 | |
iommm/vt-d: Store irq domain in struct device
As a first 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.
This is done from dmar_pci_bus_add_dev() because it has to work even when
DMA remapping is disabled. 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/20200826112333.714566121@linutronix.de
Diffstat (limited to 'drivers/iommu/intel/dmar.c')
| -rw-r--r-- | drivers/iommu/intel/dmar.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/iommu/intel/dmar.c b/drivers/iommu/intel/dmar.c index 93e6345f3414..4dc09edef744 100644 --- a/drivers/iommu/intel/dmar.c +++ b/drivers/iommu/intel/dmar.c @@ -316,6 +316,9 @@ static int dmar_pci_bus_add_dev(struct dmar_pci_notify_info *info) if (ret < 0 && dmar_dev_scope_status == 0) dmar_dev_scope_status = ret; + if (ret >= 0) + intel_irq_remap_add_device(info); + return ret; } |