This patch adds a list in VFIOContainer to store iommu_ctx_notifier
which is based on IOMMUContext. As a preparation of registering
iommu_ctx_notifiers.

Cc: Kevin Tian <kevin.tian@intel.com>
Cc: Jacob Pan <jacob.jun.pan@linux.intel.com>
Cc: Peter Xu <peterx@redhat.com>
Cc: Eric Auger <eric.auger@redhat.com>
Cc: Yi Sun <yi.y.sun@linux.intel.com>
Cc: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: Liu Yi L <yi.l.liu@intel.com>
---
 hw/vfio/common.c              | 1 +
 include/hw/vfio/vfio-common.h | 9 +++++++++
 2 files changed, 10 insertions(+)

diff --git a/hw/vfio/common.c b/hw/vfio/common.c
index 5ca1148..d418527 100644
--- a/hw/vfio/common.c
+++ b/hw/vfio/common.c
@@ -1271,6 +1271,7 @@ static int vfio_connect_container(VFIOGroup *group, AddressSpace *as,
     container->error = NULL;
     QLIST_INIT(&container->giommu_list);
     QLIST_INIT(&container->hostwin_list);
+    QLIST_INIT(&container->iommu_ctx_list);
 
     ret = vfio_init_container(container, group->fd, errp);
     if (ret) {
diff --git a/include/hw/vfio/vfio-common.h b/include/hw/vfio/vfio-common.h
index fd56420..975d12b 100644
--- a/include/hw/vfio/vfio-common.h
+++ b/include/hw/vfio/vfio-common.h
@@ -29,6 +29,7 @@
 #ifdef CONFIG_LINUX
 #include <linux/vfio.h>
 #endif
+#include "hw/iommu/iommu.h"
 
 #define VFIO_MSG_PREFIX "vfio %s: "
 
@@ -75,6 +76,7 @@ typedef struct VFIOContainer {
     bool initialized;
     unsigned long pgsizes;
     QLIST_HEAD(, VFIOGuestIOMMU) giommu_list;
+    QLIST_HEAD(, VFIOIOMMUContext) iommu_ctx_list;
     QLIST_HEAD(, VFIOHostDMAWindow) hostwin_list;
     QLIST_HEAD(, VFIOGroup) group_list;
     QLIST_ENTRY(VFIOContainer) next;
@@ -88,6 +90,13 @@ typedef struct VFIOGuestIOMMU {
     QLIST_ENTRY(VFIOGuestIOMMU) giommu_next;
 } VFIOGuestIOMMU;
 
+typedef struct VFIOIOMMUContext {
+    VFIOContainer *container;
+    IOMMUContext *iommu_ctx;
+    IOMMUCTXNotifier n;
+    QLIST_ENTRY(VFIOIOMMUContext) iommu_ctx_next;
+} VFIOIOMMUContext;
+
 typedef struct VFIOHostDMAWindow {
     hwaddr min_iova;
     hwaddr max_iova;
-- 
2.7.4

On Thu, Oct 24, 2019 at 08:34:26AM -0400, Liu Yi L wrote:

[...]

> +typedef struct VFIOIOMMUContext {
> +    VFIOContainer *container;
> +    IOMMUContext *iommu_ctx;
> +    IOMMUCTXNotifier n;
> +    QLIST_ENTRY(VFIOIOMMUContext) iommu_ctx_next;
> +} VFIOIOMMUContext;
> +

No strong opinion on this - but for me it would be more meaningful to
squash this patch into where this struct is firstly used.

-- 
Peter Xu

> From: Peter Xu
> Sent: Friday, November 1, 2019 10:59 PM
> To: Liu, Yi L <yi.l.liu@intel.com>
> Subject: Re: [RFC v2 05/22] vfio/common: add iommu_ctx_notifier in container
> 
> On Thu, Oct 24, 2019 at 08:34:26AM -0400, Liu Yi L wrote:
> 
> [...]
> 
> > +typedef struct VFIOIOMMUContext {
> > +    VFIOContainer *container;
> > +    IOMMUContext *iommu_ctx;
> > +    IOMMUCTXNotifier n;
> > +    QLIST_ENTRY(VFIOIOMMUContext) iommu_ctx_next; } VFIOIOMMUContext;
> > +
> 
> No strong opinion on this - but for me it would be more meaningful to squash this
> patch into where this struct is firstly used.

got it. will make it in next version.

Regards,
Yi Liu