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Commit c156e347 authored by Joerg Roedel's avatar Joerg Roedel
Browse files

AMD IOMMU: add domain init function for IOMMU API 



Impact: add a generic function for allocation protection domains

Signed-off-by: default avatarJoerg Roedel <joerg.roedel@amd.com>
parent 6d98cd80

arch/x86/kernel/amd_iommu.c

+30 −0
Original line number Diff line number Diff line
@@ -22,6 +22,9 @@ 
#include <linux/bitops.h>

#include <linux/scatterlist.h>

#include <linux/iommu-helper.h>

#ifdef CONFIG_IOMMU_API

#include <linux/iommu.h>

#endif

#include <asm/proto.h>

#include <asm/iommu.h>

#include <asm/gart.h>
@@ -1606,4 +1609,31 @@ static void cleanup_domain(struct protection_domain *domain) 
	write_unlock_irqrestore(&amd_iommu_devtable_lock, flags);

}



static int amd_iommu_domain_init(struct iommu_domain *dom)

{

	struct protection_domain *domain;



	domain = kzalloc(sizeof(*domain), GFP_KERNEL);

	if (!domain)

		return -ENOMEM;



	spin_lock_init(&domain->lock);

	domain->mode = PAGE_MODE_3_LEVEL;

	domain->id = domain_id_alloc();

	if (!domain->id)

		goto out_free;

	domain->pt_root = (void *)get_zeroed_page(GFP_KERNEL);

	if (!domain->pt_root)

		goto out_free;



	dom->priv = domain;



	return 0;



out_free:

	kfree(domain);



	return -ENOMEM;

}



#endif