Hi Eric,

On 2020/3/20 17:24, Eric Auger wrote:
Introduce an helper functions to register
- a new device, characterized by its device id and the
   max number of event IDs that dimension its ITT (Interrupt
   Translation Table).  The function allocates the ITT.

- a new collection, characterized by its ID and the
   target processing engine (PE).

Signed-off-by: Eric Auger <eric.au...@redhat.com>

---

v3 -> v4:
- remove unused its_baser variable from its_create_device()
- use get_order()
- device->itt becomes a GVA instead of GPA

v2 -> v3:
- s/report_abort/assert

v1 -> v2:
- s/nb_/nr_
---
  lib/arm64/asm/gic-v3-its.h | 19 +++++++++++++++++++
  lib/arm64/gic-v3-its.c     | 38 ++++++++++++++++++++++++++++++++++++++
  2 files changed, 57 insertions(+)

diff --git a/lib/arm64/asm/gic-v3-its.h b/lib/arm64/asm/gic-v3-its.h
index 4683011..adcb642 100644
--- a/lib/arm64/asm/gic-v3-its.h
+++ b/lib/arm64/asm/gic-v3-its.h
@@ -31,6 +31,19 @@ struct its_baser {
  };
#define GITS_BASER_NR_REGS 8
+#define GITS_MAX_DEVICES               8
+#define GITS_MAX_COLLECTIONS           8
+
+struct its_device {
+       u32 device_id;  /* device ID */
+       u32 nr_ites;    /* Max Interrupt Translation Entries */
+       void *itt;      /* Interrupt Translation Table GVA */
+};
+
+struct its_collection {
+       u64 target_address;
+       u16 col_id;
+};
struct its_data {
        void *base;
@@ -39,6 +52,10 @@ struct its_data {
        struct its_baser coll_baser;
        struct its_cmd_block *cmd_base;
        struct its_cmd_block *cmd_write;
+       struct its_device devices[GITS_MAX_DEVICES];
+       u32 nr_devices;         /* Allocated Devices */
+       struct its_collection collections[GITS_MAX_COLLECTIONS];
+       u32 nr_collections;     /* Allocated Collections */
  };
extern struct its_data its_data;
@@ -93,5 +110,7 @@ extern void its_parse_typer(void);
  extern void its_init(void);
  extern int its_baser_lookup(int i, struct its_baser *baser);
  extern void its_enable_defaults(void);
+extern struct its_device *its_create_device(u32 dev_id, int nr_ites);
+extern struct its_collection *its_create_collection(u32 col_id, u32 target_pe);

Maybe use 'u16 col_id'?

Besides,
Reviewed-by: Zenghui Yu <yuzeng...@huawei.com>


Thanks

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