[Xen-devel] [PATCH v3 14/15] tools: implement new generic set value interface and MBA set value command

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

This patch implements new generic set value interfaces in libxc and libxl.
These interfaces are suitable for all allocation features. It also adds a
new MBA set value command in xl.

Signed-off-by: Yi Sun <yi.y.sun@xxxxxxxxxxxxxxx>
---
v3:
    - add 'const' for 'opts[]' in 'main_psr_mba_set'.
      (suggested by Roger Pau Monné)
    - replace 'libxl_psr_cbm_type' to 'libxl_psr_type' for newly defined
      interfaces.
      (suggested by Roger Pau Monné)
---
 tools/libxc/include/xenctrl.h |  6 ++---
 tools/libxc/xc_psr.c          |  9 ++++---
 tools/libxl/libxl_psr.c       | 56 +++++++++++++++++++++----------------------
 tools/xl/xl.h                 |  1 +
 tools/xl/xl_cmdtable.c        |  6 +++++
 tools/xl/xl_psr.c             | 55 ++++++++++++++++++++++++++++++++++++++++++
 6 files changed, 99 insertions(+), 34 deletions(-)

diff --git a/tools/libxc/include/xenctrl.h b/tools/libxc/include/xenctrl.h
index eef06be..21dac2f 100644
--- a/tools/libxc/include/xenctrl.h
+++ b/tools/libxc/include/xenctrl.h
@@ -2499,9 +2499,9 @@ int xc_psr_cmt_get_data(xc_interface *xch, uint32_t rmid, 
uint32_t cpu,
                         uint64_t *tsc);
 int xc_psr_cmt_enabled(xc_interface *xch);
 
-int xc_psr_cat_set_domain_data(xc_interface *xch, uint32_t domid,
-                               xc_psr_type type, uint32_t target,
-                               uint64_t data);
+int xc_psr_set_domain_data(xc_interface *xch, uint32_t domid,
+                           xc_psr_type type, uint32_t target,
+                           uint64_t data);
 int xc_psr_get_domain_data(xc_interface *xch, uint32_t domid,
                            xc_psr_type type, uint32_t target,
                            uint64_t *data);
diff --git a/tools/libxc/xc_psr.c b/tools/libxc/xc_psr.c
index 2f0eed9..e53b5f5 100644
--- a/tools/libxc/xc_psr.c
+++ b/tools/libxc/xc_psr.c
@@ -248,9 +248,9 @@ int xc_psr_cmt_enabled(xc_interface *xch)
 
     return 0;
 }
-int xc_psr_cat_set_domain_data(xc_interface *xch, uint32_t domid,
-                               xc_psr_type type, uint32_t target,
-                               uint64_t data)
+int xc_psr_set_domain_data(xc_interface *xch, uint32_t domid,
+                           xc_psr_type type, uint32_t target,
+                           uint64_t data)
 {
     DECLARE_DOMCTL;
     uint32_t cmd;
@@ -269,6 +269,9 @@ int xc_psr_cat_set_domain_data(xc_interface *xch, uint32_t 
domid,
     case XC_PSR_CAT_L2_CBM:
         cmd = XEN_DOMCTL_PSR_ALLOC_SET_L2_CBM;
         break;
+    case XC_PSR_MBA_THRTL:
+        cmd = XEN_DOMCTL_PSR_ALLOC_SET_MBA_THRTL;
+        break;
     default:
         errno = EINVAL;
         return -1;
diff --git a/tools/libxl/libxl_psr.c b/tools/libxl/libxl_psr.c
index 78d5bc5..d3c3d42 100644
--- a/tools/libxl/libxl_psr.c
+++ b/tools/libxl/libxl_psr.c
@@ -328,33 +328,7 @@ int libxl_psr_cat_set_cbm(libxl_ctx *ctx, uint32_t domid,
                           libxl_psr_cbm_type type, libxl_bitmap *target_map,
                           uint64_t cbm)
 {
-    GC_INIT(ctx);
-    int rc;
-    int socketid, nr_sockets;
-
-    rc = libxl__count_physical_sockets(gc, &nr_sockets);
-    if (rc) {
-        LOGED(ERROR, domid, "failed to get system socket count");
-        goto out;
-    }
-
-    libxl_for_each_set_bit(socketid, *target_map) {
-        xc_psr_type xc_type;
-
-        if (socketid >= nr_sockets)
-            break;
-
-        xc_type = libxl__psr_type_to_libxc_psr_type(type);
-        if (xc_psr_cat_set_domain_data(ctx->xch, domid, xc_type,
-                                       socketid, cbm)) {
-            libxl__psr_alloc_log_err_msg(gc, errno, type);
-            rc = ERROR_FAIL;
-        }
-    }
-
-out:
-    GC_FREE;
-    return rc;
+    return libxl_psr_set_val(ctx, domid, type, target_map, cbm);
 }
 
 int libxl_psr_cat_get_cbm(libxl_ctx *ctx, uint32_t domid,
@@ -458,7 +432,33 @@ 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;
+    GC_INIT(ctx);
+    int rc;
+    int socketid, nr_sockets;
+
+    rc = libxl__count_physical_sockets(gc, &nr_sockets);
+    if (rc) {
+        LOG(ERROR, "failed to get system socket count");
+        goto out;
+    }
+
+    libxl_for_each_set_bit(socketid, *target_map) {
+        xc_psr_type xc_type;
+
+        if (socketid >= nr_sockets)
+            break;
+
+        xc_type = libxl__psr_type_to_libxc_psr_type(type);
+        if (xc_psr_set_domain_data(ctx->xch, domid, xc_type,
+                                   socketid, val)) {
+            libxl__psr_alloc_log_err_msg(gc, errno, type);
+            rc = ERROR_FAIL;
+        }
+    }
+
+out:
+    GC_FREE;
+    return rc;
 }
 
 int libxl_psr_get_val(libxl_ctx *ctx, uint32_t domid,
diff --git a/tools/xl/xl.h b/tools/xl/xl.h
index 3389df9..3f99b6b 100644
--- a/tools/xl/xl.h
+++ b/tools/xl/xl.h
@@ -204,6 +204,7 @@ int main_psr_cmt_detach(int argc, char **argv);
 int main_psr_cmt_show(int argc, char **argv);
 int main_psr_cat_cbm_set(int argc, char **argv);
 int main_psr_cat_show(int argc, char **argv);
+int main_psr_mba_set(int argc, char **argv);
 int main_psr_mba_show(int argc, char **argv);
 #endif
 int main_qemu_monitor_command(int argc, char **argv);
diff --git a/tools/xl/xl_cmdtable.c b/tools/xl/xl_cmdtable.c
index cdc2349..9d45d3b 100644
--- a/tools/xl/xl_cmdtable.c
+++ b/tools/xl/xl_cmdtable.c
@@ -560,6 +560,12 @@ struct cmd_spec cmd_table[] = {
       "[options] <Domain>",
       "-l <level>        Specify the cache level to process, otherwise L3 
cache is processed\n"
     },
+    { "psr-mba-set",
+      &main_psr_mba_set, 0, 1,
+      "Set throttling value (THRTL) for a domain",
+      "[options] <Domain> <THRTL>",
+      "-s <socket>       Specify the socket to process, otherwise all sockets 
are processed\n"
+    },
     { "psr-mba-show",
       &main_psr_mba_show, 0, 1,
       "Show Memory Bandwidth Allocation information",
diff --git a/tools/xl/xl_psr.c b/tools/xl/xl_psr.c
index 46b7788..a648b1a 100644
--- a/tools/xl/xl_psr.c
+++ b/tools/xl/xl_psr.c
@@ -552,6 +552,61 @@ int main_psr_mba_show(int argc, char **argv)
     return psr_val_show(domid, LIBXL_PSR_FEAT_TYPE_MBA, 0);
 }
 
+int main_psr_mba_set(int argc, char **argv)
+{
+    uint32_t domid;
+    libxl_psr_type type;
+    uint64_t thrtl;
+    int ret, opt = 0;
+    libxl_bitmap target_map;
+    char *value;
+    libxl_string_list socket_list;
+    unsigned long start, end;
+    unsigned int i, j, len;
+
+    static const struct option opts[] = {
+        {"socket", 1, 0, 's'},
+        COMMON_LONG_OPTS
+    };
+
+    libxl_socket_bitmap_alloc(ctx, &target_map, 0);
+    libxl_bitmap_set_none(&target_map);
+
+    SWITCH_FOREACH_OPT(opt, "s:", opts, "psr-mba-set", 0) {
+    case 's':
+        trim(isspace, optarg, &value);
+        split_string_into_string_list(value, ",", &socket_list);
+        len = libxl_string_list_length(&socket_list);
+        for (i = 0; i < len; i++) {
+           parse_range(socket_list[i], &start, &end);
+            for (j = start; j <= end; j++)
+                libxl_bitmap_set(&target_map, j);
+        }
+
+        libxl_string_list_dispose(&socket_list);
+        free(value);
+        break;
+    }
+
+    type = LIBXL_PSR_CBM_TYPE_MBA_THRTL;
+
+    if (libxl_bitmap_is_empty(&target_map))
+        libxl_bitmap_set_any(&target_map);
+
+    if (argc != optind + 2) {
+        help("psr-mba-set");
+        return 2;
+    }
+
+    domid = find_domain(argv[optind]);
+    thrtl = strtoll(argv[optind + 1], NULL , 0);
+
+    ret = libxl_psr_set_val(ctx, domid, type, &target_map, thrtl);
+
+    libxl_bitmap_dispose(&target_map);
+    return ret;
+}
+
 static int psr_mba_hwinfo(void)
 {
     int rc;
-- 
1.9.1


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