[PATCH v14 09/16] vfio: Introduce a vfio_dma type field

[Eric Auger]

We introduce a vfio_dma type since we will need to discriminate
different types of dma slots:
- VFIO_IOVA_USER: IOVA region used to map user vaddr
- VFIO_IOVA_RESERVED_MSI: IOVA region reserved to map MSI doorbells

Signed-off-by: Eric Auger 
Acked-by: Alex Williamson 

---
v9 -> v10:
- renamed VFIO_IOVA_RESERVED into VFIO_IOVA_RESERVED_MSI
- explicitly set type to VFIO_IOVA_USER on dma_map

v6 -> v7:
- add VFIO_IOVA_ANY
- do not introduce yet any VFIO_IOVA_RESERVED handling
---
 drivers/vfio/vfio_iommu_type1.c | 8 
 1 file changed, 8 insertions(+)

diff --git a/drivers/vfio/vfio_iommu_type1.c b/drivers/vfio/vfio_iommu_type1.c
index 2ba1942..a9f8b93 100644
--- a/drivers/vfio/vfio_iommu_type1.c
+++ b/drivers/vfio/vfio_iommu_type1.c
@@ -53,6 +53,12 @@ module_param_named(disable_hugepages,
 MODULE_PARM_DESC(disable_hugepages,
 "Disable VFIO IOMMU support for IOMMU hugepages.");
 
+enum vfio_iova_type {
+   VFIO_IOVA_USER = 0, /* standard IOVA used to map user vaddr */
+   VFIO_IOVA_RESERVED_MSI, /* reserved to map MSI doorbells */
+   VFIO_IOVA_ANY,  /* matches any IOVA type */
+};
+
 struct vfio_iommu {
struct list_headdomain_list;
struct mutexlock;
@@ -75,6 +81,7 @@ struct vfio_dma {
unsigned long   vaddr;  /* Process virtual addr */
size_t  size;   /* Map size (bytes) */
int prot;   /* IOMMU_READ/WRITE */
+   enum vfio_iova_type type;   /* type of IOVA */
 };
 
 struct vfio_group {
@@ -607,6 +614,7 @@ static int vfio_dma_do_map(struct vfio_iommu *iommu,
dma->iova = iova;
dma->vaddr = vaddr;
dma->prot = prot;
+   dma->type = VFIO_IOVA_USER;
 
/* Insert zero-sized and grow as we map chunks of it */
vfio_link_dma(iommu, dma);
-- 
1.9.1

[PATCH v14 09/16] vfio: Introduce a vfio_dma type field

[Eric Auger]

We introduce a vfio_dma type since we will need to discriminate
different types of dma slots:
- VFIO_IOVA_USER: IOVA region used to map user vaddr
- VFIO_IOVA_RESERVED_MSI: IOVA region reserved to map MSI doorbells

Signed-off-by: Eric Auger 
Acked-by: Alex Williamson 

---
v9 -> v10:
- renamed VFIO_IOVA_RESERVED into VFIO_IOVA_RESERVED_MSI
- explicitly set type to VFIO_IOVA_USER on dma_map

v6 -> v7:
- add VFIO_IOVA_ANY
- do not introduce yet any VFIO_IOVA_RESERVED handling
---
 drivers/vfio/vfio_iommu_type1.c | 8 
 1 file changed, 8 insertions(+)

diff --git a/drivers/vfio/vfio_iommu_type1.c b/drivers/vfio/vfio_iommu_type1.c
index 2ba1942..a9f8b93 100644
--- a/drivers/vfio/vfio_iommu_type1.c
+++ b/drivers/vfio/vfio_iommu_type1.c
@@ -53,6 +53,12 @@ module_param_named(disable_hugepages,
 MODULE_PARM_DESC(disable_hugepages,
 "Disable VFIO IOMMU support for IOMMU hugepages.");
 
+enum vfio_iova_type {
+   VFIO_IOVA_USER = 0, /* standard IOVA used to map user vaddr */
+   VFIO_IOVA_RESERVED_MSI, /* reserved to map MSI doorbells */
+   VFIO_IOVA_ANY,  /* matches any IOVA type */
+};
+
 struct vfio_iommu {
struct list_headdomain_list;
struct mutexlock;
@@ -75,6 +81,7 @@ struct vfio_dma {
unsigned long   vaddr;  /* Process virtual addr */
size_t  size;   /* Map size (bytes) */
int prot;   /* IOMMU_READ/WRITE */
+   enum vfio_iova_type type;   /* type of IOVA */
 };
 
 struct vfio_group {
@@ -607,6 +614,7 @@ static int vfio_dma_do_map(struct vfio_iommu *iommu,
dma->iova = iova;
dma->vaddr = vaddr;
dma->prot = prot;
+   dma->type = VFIO_IOVA_USER;
 
/* Insert zero-sized and grow as we map chunks of it */
vfio_link_dma(iommu, dma);
-- 
1.9.1