Commit 57629b75 authored by Yi Liu's avatar Yi Liu Committed by Jason Zeng
Browse files

iommu/vt-d: Wrap the dirty tracking loop to be a helper 

mainline inclusion
from mainline-v6.8-rc6
commit 0c7f2497b39da44253d7bcf2b41f52b0048859ad
category: feature
bugzilla: https://gitee.com/openeuler/kernel/issues/I938E2
CVE: NA

Reference: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=0c7f2497b39da44253d7bcf2b41f52b0048859ad



--------------------------------

Add device_set_dirty_tracking() to loop all the devices and set the dirty
tracking per the @enable parameter.

Signed-off-by: default avatarYi Liu <yi.l.liu@intel.com>
Reviewed-by: default avatarKevin Tian <kevin.tian@intel.com>
Reviewed-by: default avatarJoao Martins <joao.m.martins@oracle.com>
Link: https://lore.kernel.org/r/20240208082307.15759-8-yi.l.liu@intel.com


Signed-off-by: default avatarLu Baolu <baolu.lu@linux.intel.com>
Signed-off-by: default avatarJoerg Roedel <jroedel@suse.de>
Signed-off-by: default avatarJason Zeng <jason.zeng@intel.com>
parent 5c54c262

drivers/iommu/intel/iommu.c

+24 −11
Original line number Diff line number Diff line
@@ -4713,23 +4713,38 @@ static void *intel_iommu_hw_info(struct device *dev, u32 *length, u32 *type) 
	return vtd;

}



/*

 * Set dirty tracking for the device list of a domain. The caller must

 * hold the domain->lock when calling it.

 */

static int device_set_dirty_tracking(struct list_head *devices, bool enable)

{

	struct device_domain_info *info;

	int ret = 0;



	list_for_each_entry(info, devices, link) {

		ret = intel_pasid_setup_dirty_tracking(info->iommu, info->dev,

						       IOMMU_NO_PASID, enable);

		if (ret)

			break;

	}



	return ret;

}



static int intel_iommu_set_dirty_tracking(struct iommu_domain *domain,

					  bool enable)

{

	struct dmar_domain *dmar_domain = to_dmar_domain(domain);

	struct device_domain_info *info;

	int ret;



	spin_lock(&dmar_domain->lock);

	if (dmar_domain->dirty_tracking == enable)

		goto out_unlock;



	list_for_each_entry(info, &dmar_domain->devices, link) {

		ret = intel_pasid_setup_dirty_tracking(info->iommu, info->dev,

						       IOMMU_NO_PASID, enable);

	ret = device_set_dirty_tracking(&dmar_domain->devices, enable);

	if (ret)

		goto err_unwind;

	}



	dmar_domain->dirty_tracking = enable;

out_unlock:
@@ -4738,9 +4753,7 @@ static int intel_iommu_set_dirty_tracking(struct iommu_domain *domain, 
	return 0;



err_unwind:

	list_for_each_entry(info, &dmar_domain->devices, link)

		intel_pasid_setup_dirty_tracking(info->iommu, info->dev,

						 IOMMU_NO_PASID,

	device_set_dirty_tracking(&dmar_domain->devices,

				  dmar_domain->dirty_tracking);

	spin_unlock(&dmar_domain->lock);

	return ret;