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Commit 3fa43655 authored by Joerg Roedel's avatar Joerg Roedel
Browse files

x86/amd-iommu: Introduce iommu_flush_device() function 



This patch adds a function to flush a DTE entry for a given
struct device and replaces iommu_queue_inv_dev_entry calls
with this function where appropriate.

Signed-off-by: default avatarJoerg Roedel <joerg.roedel@amd.com>
parent 7f760ddd

arch/x86/kernel/amd_iommu.c

+15 −4
Original line number Diff line number Diff line
@@ -494,6 +494,17 @@ static int iommu_queue_inv_dev_entry(struct amd_iommu *iommu, u16 devid) 
	return ret;

}



static int iommu_flush_device(struct device *dev)

{

	struct amd_iommu *iommu;

	u16 devid;



	devid = get_device_id(dev);

	iommu = amd_iommu_rlookup_table[devid];



	return iommu_queue_inv_dev_entry(iommu, devid);

}



static void __iommu_build_inv_iommu_pages(struct iommu_cmd *cmd, u64 address,

					  u16 domid, int pde, int s)

{
@@ -1382,7 +1393,7 @@ static void do_attach(struct device *dev, struct protection_domain *domain) 
	domain->dev_cnt                 += 1;



	/* Flush the DTE entry */

	iommu_queue_inv_dev_entry(iommu, devid);

	iommu_flush_device(dev);

}



static void do_detach(struct device *dev)
@@ -1405,7 +1416,7 @@ static void do_detach(struct device *dev) 
	clear_dte_entry(devid);



	/* Flush the DTE entry */

	iommu_queue_inv_dev_entry(iommu, devid);

	iommu_flush_device(dev);

}



/*
@@ -1610,7 +1621,7 @@ static int device_change_notifier(struct notifier_block *nb, 
		goto out;

	}



	iommu_queue_inv_dev_entry(iommu, devid);

	iommu_flush_device(dev);

	iommu_completion_wait(iommu);



out:
@@ -2393,7 +2404,7 @@ static void amd_iommu_detach_device(struct iommu_domain *dom, 
	if (!iommu)

		return;



	iommu_queue_inv_dev_entry(iommu, devid);

	iommu_flush_device(dev);

	iommu_completion_wait(iommu);

}