[PATCH 14/21] AMD IOMMU: add domain init function for IOMMU API

[Joerg Roedel]

Impact: add a generic function for allocation protection domains

Signed-off-by: Joerg Roedel <joerg.roedel@xxxxxxx>
---
 arch/x86/kernel/amd_iommu.c |   28 ++++++++++++++++++++++++++++
 1 files changed, 28 insertions(+), 0 deletions(-)

diff --git a/arch/x86/kernel/amd_iommu.c b/arch/x86/kernel/amd_iommu.c
index 26b929b..cb7db66 100644
--- a/arch/x86/kernel/amd_iommu.c
+++ b/arch/x86/kernel/amd_iommu.c
@@ -22,6 +22,7 @@
 #include <linux/bitops.h>
 #include <linux/scatterlist.h>
 #include <linux/iommu-helper.h>
+#include <linux/iommu.h>
 #include <asm/proto.h>
 #include <asm/iommu.h>
 #include <asm/amd_iommu_types.h>
@@ -1524,3 +1525,30 @@ 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;
+}
-- 
1.5.6.4


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