[Xen-devel] [PATCH v6 09/16] tools: create general interfaces to support psr allocation features

[Yi Sun <yi.y.sun@xxxxxxxxxxxxxxx>]

This patch creates general interfaces in libxl to support all psr
allocation features.

Add 'LIBXL_HAVE_PSR_GENERIC' to indicate interface change.

Please note, the functionality cannot work until later patches
are applied.

Signed-off-by: Yi Sun <yi.y.sun@xxxxxxxxxxxxxxx>
Reviewed-by: Roger Pau Monné <roger.pau@xxxxxxxxxx>
Acked-by: Wei Liu <wei.liu2@xxxxxxxxxx>
---
CC: Wei Liu <wei.liu2@xxxxxxxxxx>
CC: Ian Jackson <ian.jackson@xxxxxxxxxxxxx>
CC: Roger Pau Monné <roger.pau@xxxxxxxxxx>
CC: Chao Peng <chao.p.peng@xxxxxxxxxxxxxxx>

v5:
    - adjust parameters position in 'libxl_psr_get_hw_info'.
      (suggested by Roger Pau Monné)
v4:
    - add description for LIBXL_HAVE_PSR_GENERIC to mention newly added
      public functions.
      (suggested by Roger Pau Monné)
v3:
    - change 'LIBXL_HAVE_PSR_MBA' to 'LIBXL_HAVE_PSR_GENERIC'.
      (suggested by Roger Pau Monné)
    - 'typedef enum libxl_psr_cbm_type libxl_psr_type;' in libxl.h.
      (suggested by Roger Pau Monné and Wei Liu)
    - change 'libxl_psr_cbm_type' to 'libxl_psr_type' in newly defined
      interfaces.
      (suggested by Roger Pau Monné)
v2:
    - remove '_INFO' in 'libxl_psr_feat_type' and make corresponding
      changes in 'libxl_psr_hw_info'.
      (suggested by Chao Peng)
---
 tools/libxl/libxl.h         | 37 +++++++++++++++++++++++++++++++++++++
 tools/libxl/libxl_psr.c     | 25 +++++++++++++++++++++++++
 tools/libxl/libxl_types.idl | 22 ++++++++++++++++++++++
 3 files changed, 84 insertions(+)

diff --git a/tools/libxl/libxl.h b/tools/libxl/libxl.h
index 827272e..0d2dee8 100644
--- a/tools/libxl/libxl.h
+++ b/tools/libxl/libxl.h
@@ -967,6 +967,17 @@ void libxl_mac_copy(libxl_ctx *ctx, libxl_mac *dst, const 
libxl_mac *src);
 #define LIBXL_HAVE_PSR_L2_CAT 1
 
 /*
+ * LIBXL_HAVE_PSR_GENERIC
+ *
+ * If this is defined, the Memory Bandwidth Allocation feature is supported.
+ * The following public functions are available:
+ *   libxl_psr_{set/get}_val
+ *   libxl_psr_get_hw_info
+ *   libxl_psr_hw_info_list_free
+ */
+#define LIBXL_HAVE_PSR_GENERIC 1
+
+/*
  * LIBXL_HAVE_MCA_CAPS
  *
  * If this is defined, setting MCA capabilities for HVM domain is supported.
@@ -2287,6 +2298,32 @@ int libxl_psr_cat_get_info(libxl_ctx *ctx, 
libxl_psr_cat_info **info,
 int libxl_psr_cat_get_l3_info(libxl_ctx *ctx, libxl_psr_cat_info **info,
                               int *nr);
 void libxl_psr_cat_info_list_free(libxl_psr_cat_info *list, int nr);
+
+typedef enum libxl_psr_cbm_type libxl_psr_type;
+
+/*
+ * Function to set a domain's value. It operates on a single or multiple
+ * target(s) defined in 'target_map'. 'target_map' specifies all the sockets
+ * to be operated on.
+ */
+int libxl_psr_set_val(libxl_ctx *ctx, uint32_t domid,
+                      libxl_psr_type type, libxl_bitmap *target_map,
+                      uint64_t val);
+/*
+ * Function to get a domain's cbm. It operates on a single 'target'.
+ * 'target' specifies which socket to be operated on.
+ */
+int libxl_psr_get_val(libxl_ctx *ctx, uint32_t domid,
+                      libxl_psr_type type, unsigned int target,
+                      uint64_t *val);
+/*
+ * On success, the function returns an array of elements in 'info',
+ * and the length in 'nr'.
+ */
+int libxl_psr_get_hw_info(libxl_ctx *ctx, libxl_psr_feat_type type,
+                          unsigned int lvl, unsigned int *nr,
+                          libxl_psr_hw_info **info);
+void libxl_psr_hw_info_list_free(libxl_psr_hw_info *list, unsigned int nr);
 #endif
 
 /* misc */
diff --git a/tools/libxl/libxl_psr.c b/tools/libxl/libxl_psr.c
index 197505a..d4f5f67 100644
--- a/tools/libxl/libxl_psr.c
+++ b/tools/libxl/libxl_psr.c
@@ -428,6 +428,31 @@ void libxl_psr_cat_info_list_free(libxl_psr_cat_info 
*list, int nr)
     free(list);
 }
 
+int libxl_psr_set_val(libxl_ctx *ctx, uint32_t domid,
+                      libxl_psr_type type, libxl_bitmap *target_map,
+                      uint64_t val)
+{
+    return ERROR_FAIL;
+}
+
+int libxl_psr_get_val(libxl_ctx *ctx, uint32_t domid,
+                      libxl_psr_type type, unsigned int target,
+                      uint64_t *val)
+{
+    return ERROR_FAIL;
+}
+
+int libxl_psr_get_hw_info(libxl_ctx *ctx, libxl_psr_feat_type type,
+                          unsigned int lvl, unsigned int *nr,
+                          libxl_psr_hw_info **info)
+{
+    return ERROR_FAIL;
+}
+
+void libxl_psr_hw_info_list_free(libxl_psr_hw_info *list, unsigned int nr)
+{
+}
+
 /*
  * Local variables:
  * mode: C
diff --git a/tools/libxl/libxl_types.idl b/tools/libxl/libxl_types.idl
index c2a1141..6f53b2d 100644
--- a/tools/libxl/libxl_types.idl
+++ b/tools/libxl/libxl_types.idl
@@ -1025,6 +1025,7 @@ libxl_psr_cbm_type = Enumeration("psr_cbm_type", [
     (2, "L3_CBM_CODE"),
     (3, "L3_CBM_DATA"),
     (4, "L2_CBM"),
+    (5, "MBA_THRTL"),
     ])
 
 libxl_psr_cat_info = Struct("psr_cat_info", [
@@ -1033,3 +1034,24 @@ libxl_psr_cat_info = Struct("psr_cat_info", [
     ("cbm_len", uint32),
     ("cdp_enabled", bool),
     ])
+
+libxl_psr_feat_type = Enumeration("psr_feat_type", [
+    (1, "CAT"),
+    (2, "MBA"),
+    ])
+
+libxl_psr_hw_info = Struct("psr_hw_info", [
+    ("id", uint32),
+    ("u", KeyedUnion(None, libxl_psr_feat_type, "type",
+          [("cat", Struct(None, [
+                                    ("cos_max",     uint32),
+                                    ("cbm_len",     uint32),
+                                    ("cdp_enabled", bool),
+                               ])),
+           ("mba", Struct(None, [
+                                    ("cos_max",     uint32),
+                                    ("thrtl_max",   uint32),
+                                    ("linear",      bool),
+                               ])),
+          ]))
+    ], dir=DIR_OUT)
-- 
1.9.1


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