tools: L2 CAT: support show cbm for L2 CAT.

This patch implements changes in xl/xc changes to support
showing CBM of L2 CAT.

The new level option is introduced to original CAT showing
command in order to show CBM for specified level CAT.
- 'xl psr-cat-show' is updated to show CBM of a domain
  according to input cache level.

Examples:
root@:~$ xl psr-cat-show -l2 1
Socket ID       : 0
Default CBM     : 0xff
   ID                     NAME             CBM
    1                 ubuntu14            0x7f

Signed-off-by: He Chen <he.chen@linux.intel.com>
Signed-off-by: Yi Sun <yi.y.sun@linux.intel.com>
Acked-by: Wei Liu <wei.liu2@citrix.com>

tools/libxc/include/xenctrl.h

@@ -2454,6 +2454,7 @@ enum xc_psr_cat_type {
     XC_PSR_CAT_L3_CBM      = 1,
     XC_PSR_CAT_L3_CBM_CODE = 2,
     XC_PSR_CAT_L3_CBM_DATA = 3,
+    XC_PSR_CAT_L2_CBM      = 4,
 };
 typedef enum xc_psr_cat_type xc_psr_cat_type;
 

tools/libxc/xc_psr.c

@@ -299,6 +299,9 @@ int xc_psr_cat_get_domain_data(xc_interface *xch, uint32_t domid,
     case XC_PSR_CAT_L3_CBM_DATA:
         cmd = XEN_DOMCTL_PSR_CAT_OP_GET_L3_DATA;
         break;
+    case XC_PSR_CAT_L2_CBM:
+        cmd = XEN_DOMCTL_PSR_CAT_OP_GET_L2_CBM;
+        break;
     default:
         errno = EINVAL;
         return -1;

tools/xl/xl_cmdtable.c

@@ -557,7 +557,8 @@ struct cmd_spec cmd_table[] = {
     { "psr-cat-show",
       &main_psr_cat_show, 0, 1,
       "Show Cache Allocation Technology information",
-      "<Domain>",
+      "[options] <Domain>",
+      "-l <level>        Specify the cache level to process, otherwise L3 cache is processed\n"
     },
 
 #endif

tools/xl/xl_psr.c

@@ -342,7 +342,7 @@ static void psr_cat_print_one_domain_cbm_type(uint32_t domid, uint32_t socketid,
 }
 
 static void psr_cat_print_one_domain_cbm(uint32_t domid, uint32_t socketid,
-                                         bool cdp_enabled)
+                                         bool cdp_enabled, unsigned int lvl)
 {
     char *domain_name;
 
@@ -350,27 +350,38 @@ static void psr_cat_print_one_domain_cbm(uint32_t domid, uint32_t socketid,
     printf("%5d%25s", domid, domain_name);
     free(domain_name);
 
-    if (!cdp_enabled) {
+    switch (lvl) {
+    case 3:
+        if (!cdp_enabled) {
+            psr_cat_print_one_domain_cbm_type(domid, socketid,
+                                              LIBXL_PSR_CBM_TYPE_L3_CBM);
+        } else {
+            psr_cat_print_one_domain_cbm_type(domid, socketid,
+                                              LIBXL_PSR_CBM_TYPE_L3_CBM_CODE);
+            psr_cat_print_one_domain_cbm_type(domid, socketid,
+                                              LIBXL_PSR_CBM_TYPE_L3_CBM_DATA);
+        }
+        break;
+    case 2:
         psr_cat_print_one_domain_cbm_type(domid, socketid,
-                                          LIBXL_PSR_CBM_TYPE_L3_CBM);
-    } else {
-        psr_cat_print_one_domain_cbm_type(domid, socketid,
-                                          LIBXL_PSR_CBM_TYPE_L3_CBM_CODE);
-        psr_cat_print_one_domain_cbm_type(domid, socketid,
-                                          LIBXL_PSR_CBM_TYPE_L3_CBM_DATA);
+                                          LIBXL_PSR_CBM_TYPE_L2_CBM);
+        break;
+    default:
+        printf("Input lvl %d is wrong!", lvl);
+        break;
     }
 
     printf("\n");
 }
 
 static int psr_cat_print_domain_cbm(uint32_t domid, uint32_t socketid,
-                                    bool cdp_enabled)
+                                    bool cdp_enabled, unsigned int lvl)
 {
     int i, nr_domains;
     libxl_dominfo *list;
 
     if (domid != INVALID_DOMID) {
-        psr_cat_print_one_domain_cbm(domid, socketid, cdp_enabled);
+        psr_cat_print_one_domain_cbm(domid, socketid, cdp_enabled, lvl);
         return 0;
     }
 
@@ -380,49 +391,59 @@ static int psr_cat_print_domain_cbm(uint32_t domid, uint32_t socketid,
     }
 
     for (i = 0; i < nr_domains; i++)
-        psr_cat_print_one_domain_cbm(list[i].domid, socketid, cdp_enabled);
+        psr_cat_print_one_domain_cbm(list[i].domid, socketid, cdp_enabled, lvl);
     libxl_dominfo_list_free(list, nr_domains);
 
     return 0;
 }
 
-static int psr_cat_print_socket(uint32_t domid, libxl_psr_cat_info *info)
+static int psr_cat_print_socket(uint32_t domid, libxl_psr_cat_info *info,
+                                unsigned int lvl)
 {
     int rc;
     uint32_t l3_cache_size;
 
-    rc = libxl_psr_cmt_get_l3_cache_size(ctx, info->id, &l3_cache_size);
-    if (rc) {
-        fprintf(stderr, "Failed to get l3 cache size for socket:%d\n",
-                info->id);
-        return -1;
+    printf("%-16s: %u\n", "Socket ID", info->id);
+
+    /* So far, CMT only supports L3 cache. */
+    if (lvl == 3) {
+        rc = libxl_psr_cmt_get_l3_cache_size(ctx, info->id, &l3_cache_size);
+        if (rc) {
+            fprintf(stderr, "Failed to get l3 cache size for socket:%d\n",
+                    info->id);
+            return -1;
+        }
+        printf("%-16s: %uKB\n", "L3 Cache", l3_cache_size);
     }
 
-    printf("%-16s: %u\n", "Socket ID", info->id);
-    printf("%-16s: %uKB\n", "L3 Cache", l3_cache_size);
     printf("%-16s: %#llx\n", "Default CBM", (1ull << info->cbm_len) - 1);
     if (info->cdp_enabled)
         printf("%5s%25s%16s%16s\n", "ID", "NAME", "CBM (code)", "CBM (data)");
     else
         printf("%5s%25s%16s\n", "ID", "NAME", "CBM");
 
-    return psr_cat_print_domain_cbm(domid, info->id, info->cdp_enabled);
+    return psr_cat_print_domain_cbm(domid, info->id, info->cdp_enabled, lvl);
 }
 
-static int psr_cat_show(uint32_t domid)
+static int psr_cat_show(uint32_t domid, unsigned int lvl)
 {
     int i, nr;
     int rc;
     libxl_psr_cat_info *info;
 
-    rc = libxl_psr_cat_get_info(ctx, &info, &nr, 3);
+    if (lvl != 2 && lvl != 3) {
+        fprintf(stderr, "Input lvl %d is wrong\n", lvl);
+        return EXIT_FAILURE;
+    }
+
+    rc = libxl_psr_cat_get_info(ctx, &info, &nr, lvl);
     if (rc) {
-        fprintf(stderr, "Failed to get cat info\n");
+        fprintf(stderr, "Failed to get %s cat info\n", (lvl == 3)?"L3":"L2");
         return rc;
     }
 
     for (i = 0; i < nr; i++) {
-        rc = psr_cat_print_socket(domid, info + i);
+        rc = psr_cat_print_socket(domid, info + i, lvl);
         if (rc)
             goto out;
     }
@@ -533,11 +554,19 @@ int main_psr_cat_cbm_set(int argc, char **argv)
 
 int main_psr_cat_show(int argc, char **argv)
 {
-    int opt;
+    int opt = 0;
     uint32_t domid;
+    unsigned int lvl = 3;
 
-    SWITCH_FOREACH_OPT(opt, "", NULL, "psr-cat-show", 0) {
-        /* No options */
+    static struct option opts[] = {
+        {"level", 1, 0, 'l'},
+        COMMON_LONG_OPTS
+    };
+
+    SWITCH_FOREACH_OPT(opt, "l:", opts, "psr-cat-show", 0) {
+    case 'l':
+        lvl = atoi(optarg);
+        break;
     }
 
     if (optind >= argc)
@@ -549,7 +578,7 @@ int main_psr_cat_show(int argc, char **argv)
         return 2;
     }
 
-    return psr_cat_show(domid);
+    return psr_cat_show(domid, lvl);
 }
 
 int main_psr_hwinfo(int argc, char **argv)