AMD IOMMU: add protection domain flags

Imapct: add a new struct member to 'struct protection_domain'

When using protection domains for dma_ops and KVM its better to know for
which subsystem it was allocated. Add a flags member to struct
protection domain for that purpose.

Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>

1 files changed, 9 insertions, 5 deletions

diff --git a/arch/x86/include/asm/amd_iommu_types.h b/arch/x86/include/asm/amd_iommu_types.h
index ac302a2fa339..4862a5be899c 100644
--- a/arch/x86/include/asm/amd_iommu_types.h
+++ b/arch/x86/include/asm/amd_iommu_types.h
@@ -190,16 +190,20 @@
 /* FIXME: move this macro to <linux/pci.h> */
 #define PCI_BUS(x) (((x) >> 8) & 0xff)
 
+/* Protection domain flags */
+#define PD_DMA_OPS_MASK         (1UL << 0) /* domain used for dma_ops */
+
 /*
  * This structure contains generic data for  IOMMU protection domains
  * independent of their use.
  */
 struct protection_domain {
-        spinlock_t lock; /* mostly used to lock the page table*/
-        u16 id;          /* the domain id written to the device table */
-        int mode;        /* paging mode (0-6 levels) */
-        u64 *pt_root;    /* page table root pointer */
-        void *priv;      /* private data */
+        spinlock_t lock;        /* mostly used to lock the page table*/
+        u16 id;                 /* the domain id written to the device table */
+        int mode;               /* paging mode (0-6 levels) */
+        u64 *pt_root;           /* page table root pointer */
+        unsigned long flags;    /* flags to find out type of domain */
+        void *priv;             /* private data */
 };
 
 /*