From ff0b1ae0d8fde0655392fde3a1090b03a7a35394 Mon Sep 17 00:00:00 2001 From: Lu Baolu Date: Tue, 11 Jun 2019 09:29:16 +0800 Subject: [PATCH 1/1] iommu/vt-d: Allow DMA domain attaching to rmrr locked device We don't allow a device to be assigned to user level when it is locked by any RMRR's. Hence, intel_iommu_attach_device() will return error if a domain of type IOMMU_DOMAIN_UNMANAGED is about to attach to a device locked by rmrr. But this doesn't apply to a domain of type other than IOMMU_DOMAIN_UNMANAGED. This adds a check to fix this. Fixes: fa954e6831789 ("iommu/vt-d: Delegate the dma domain to upper layer") Signed-off-by: Lu Baolu --- drivers/iommu/intel-iommu.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/iommu/intel-iommu.c b/drivers/iommu/intel-iommu.c index 1dcb6365ddc4..38232220f6ff 100644 --- a/drivers/iommu/intel-iommu.c +++ b/drivers/iommu/intel-iommu.c @@ -5281,7 +5281,8 @@ static int intel_iommu_attach_device(struct iommu_domain *domain, { int ret; - if (device_is_rmrr_locked(dev)) { + if (domain->type == IOMMU_DOMAIN_UNMANAGED && + device_is_rmrr_locked(dev)) { dev_warn(dev, "Device is ineligible for IOMMU domain attach due to platform RMRR requirement. Contact your platform vendor.\n"); return -EPERM; } -- 2.17.1