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authorJoerg Roedel <joerg.roedel@amd.com>2008-12-02 18:13:27 +0100
committerJoerg Roedel <joerg.roedel@amd.com>2009-01-03 14:11:55 +0100
commitc156e347d6d3c36b6843c3b168eda61b9a02c827 (patch)
treed175cd43d1f70e5d10d4f27bf0f5eb2e268ec6fe /arch
parent6d98cd8043c13438e4ca8a9464893f0224198a30 (diff)
downloadlinux-c156e347d6d3c36b6843c3b168eda61b9a02c827.tar.bz2
AMD IOMMU: add domain init function for IOMMU API
Impact: add a generic function for allocation protection domains Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
Diffstat (limited to 'arch')
-rw-r--r--arch/x86/kernel/amd_iommu.c30
1 files changed, 30 insertions, 0 deletions
diff --git a/arch/x86/kernel/amd_iommu.c b/arch/x86/kernel/amd_iommu.c
index 5d3f085289eb..6c0bd49cee5f 100644
--- a/arch/x86/kernel/amd_iommu.c
+++ b/arch/x86/kernel/amd_iommu.c
@@ -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