Messages in this thread | | | Date | Mon, 16 Nov 2020 19:22:21 -0400 | From | Jason Gunthorpe <> | Subject | Re: iommu/vt-d: Cure VF irqdomain hickup |
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On Thu, Nov 12, 2020 at 08:15:02PM +0100, Thomas Gleixner wrote: > The recent changes to store the MSI irqdomain pointer in struct device > missed that Intel DMAR does not register virtual function devices. Due to > that a VF device gets the plain PCI-MSI domain assigned and then issues > compat MSI messages which get caught by the interrupt remapping unit. > > Cure that by inheriting the irq domain from the physical function > device. > > That's a temporary workaround. The correct fix is to inherit the irq domain > from the bus, but that's a larger effort which needs quite some other > changes to the way how x86 manages PCI and MSI domains. > > Fixes: 85a8dfc57a0b ("iommm/vt-d: Store irq domain in struct device") > Reported-by: Jason Gunthorpe <jgg@nvidia.com> > Signed-off-by: Thomas Gleixner <tglx@linutronix.de> > --- > drivers/iommu/intel/dmar.c | 19 ++++++++++++++++++- > 1 file changed, 18 insertions(+), 1 deletion(-)
Our QA says it solves the issue:
Tested-by: Itay Aveksis <itayav@nvidia.com>
Thanks, Jason
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