From 21129f786f231f7a9dce5b504617b893f50a435f Mon Sep 17 00:00:00 2001 From: Joerg Roedel Date: Tue, 1 Sep 2009 11:59:42 +0200 Subject: [PATCH] x86/amd-iommu: Make sure a device is assigned in passthrough mode When the IOMMU driver runs in passthrough mode it has to make sure that every device not assigned to an IOMMU-API domain must be put into the passthrough domain instead of keeping it unassigned. Signed-off-by: Joerg Roedel --- arch/x86/kernel/amd_iommu.c | 9 +++++++++ 1 file changed, 9 insertions(+) diff --git a/arch/x86/kernel/amd_iommu.c b/arch/x86/kernel/amd_iommu.c index 9aa135d4453f..a8e74c34dd27 100644 --- a/arch/x86/kernel/amd_iommu.c +++ b/arch/x86/kernel/amd_iommu.c @@ -1141,6 +1141,15 @@ static void __detach_device(struct protection_domain *domain, u16 devid) /* ready */ spin_unlock(&domain->lock); + + /* + * If we run in passthrough mode the device must be assigned to the + * passthrough domain if it is detached from any other domain + */ + if (iommu_pass_through) { + struct amd_iommu *iommu = amd_iommu_rlookup_table[devid]; + __attach_device(iommu, pt_domain, devid); + } } /* -- 2.34.1