Commit 5679582c authored Jun 12, 2019 by Lu Baolu Committed by Joerg Roedel Jun 12, 2019

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: fa954e68 ("iommu/vt-d: Delegate the dma domain to upper layer")
Signed-off-by: Lu Baolu <baolu.lu@linux.intel.com>
Reported-and-tested-by: Qian Cai <cai@lca.pw>
Signed-off-by: Joerg Roedel <jroedel@suse.de>

parent 6a8c6748

drivers/iommu/intel-iommu.c

+2 −1

Original line number	Diff line number	Diff line
		@@ -5167,7 +5167,8 @@ 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;
		}

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