Commit 2df985f5 authored Nov 11, 2020 by David Woodhouse Committed by Thomas Gleixner Nov 11, 2020

iommu/amd: Don't register interrupt remapping irqdomain when IR is disabled



Registering the remapping irq domain unconditionally is potentially
allowing I/O-APIC and MSI interrupts to be parented in the IOMMU IR domain
even when IR is disabled. Don't do that.

Signed-off-by: David Woodhouse <dwmw@amazon.co.uk>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Link: https://lore.kernel.org/r/20201111144322.1659970-1-dwmw2@infradead.org

parent 2fb6acf3

drivers/iommu/amd/init.c

+5 −3

Original line number	Diff line number	Diff line
		@@ -1601,9 +1601,11 @@ static int __init init_iommu_one(struct amd_iommu iommu, struct ivhd_header h)
		if (ret)
		return ret;

		if (amd_iommu_irq_remap) {
		ret = amd_iommu_create_irq_domain(iommu);
		if (ret)
		return ret;
		}

		/*
		* Make sure IOMMU is not considered to translate itself. The IVRS

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