x86/amd-iommu: Implement protection domain list
This patch adds code to keep a global list of all protection
domains. This allows to simplify the resume code.
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
diff --git a/arch/x86/kernel/amd_iommu_init.c b/arch/x86/kernel/amd_iommu_init.c
index 8567d16..73d5173 100644
--- a/arch/x86/kernel/amd_iommu_init.c
+++ b/arch/x86/kernel/amd_iommu_init.c
@@ -142,6 +142,12 @@
int amd_iommus_present;
/*
+ * List of protection domains - used during resume
+ */
+LIST_HEAD(amd_iommu_pd_list);
+spinlock_t amd_iommu_pd_lock;
+
+/*
* Pointer to the device table which is shared by all AMD IOMMUs
* it is indexed by the PCI device id or the HT unit id and contains
* information about the domain the device belongs to as well as the
@@ -1263,6 +1269,8 @@
*/
amd_iommu_pd_alloc_bitmap[0] = 1;
+ spin_lock_init(&amd_iommu_pd_lock);
+
/*
* now the data structures are allocated and basically initialized
* start the real acpi table scan