Merge remote-tracking branch 'remotes/stsquad/tags/pull-for-6.2-041121-2' into staging

Testing, gdbstub and plugin updates for 6.2

 - add microblaze and nios2 compiler docker images
 - fix test cross compiler detection for some targets
 - don't try and link ebf to user targets
 - add L2 tracking to cache plugin
 - exit cleanly on C-a x
 - clean up debug output in check-tcg
 - switch to thread on break in gdbstub
 - update openbsd VM to 7.0

# gpg: Signature made Thu 04 Nov 2021 08:14:35 AM EDT
# gpg:                using RSA key 6685AE99E75167BCAFC8DF35FBD0DB095A9E2A44
# gpg: Good signature from "Alex Bennée (Master Work Key) <alex.bennee@linaro.org>" [full]

* remotes/stsquad/tags/pull-for-6.2-041121-2:
  tests/vm/openbsd: Update to release 7.0
  tests/tcg: remove debug polluting make output
  gdbstub: Switch to the thread receiving a signal
  tests/tcg: remove duplicate EXTRA_RUNS
  plugins: try and make plugin_insn_append more ergonomic
  tests/plugins: extend the insn plugin to track opcode sizes
  chardev: don't exit() straight away on C-a x
  docs/tcg-plugins: add L2 arguments to cache docs
  plugins/cache: make L2 emulation optional through args
  plugins/cache: split command line arguments into name and value
  plugins/cache: implement unified L2 cache emulation
  plugins/cache: freed heap-allocated mutexes
  ebpf: really include it only in system emulators
  tests/tcg: enable debian-nios2-cross for test building
  tests/docker: split PARTIAL into PARTIAL and VIRTUAL images
  tests/tcg: Fix some targets default cross compiler path
  tests/tcg: Enable container_cross_cc for microblaze
  tests/docker: Add debian-microblaze-cross image
  tests/docker: Add debian-nios2-cross image

Signed-off-by: Richard Henderson <richard.henderson@linaro.org>

1 files changed, 225 insertions, 93 deletions

diff --git a/contrib/plugins/cache.c b/contrib/plugins/cache.c
index a1e03ca882..b9226e7c40 100644
--- a/contrib/plugins/cache.c
+++ b/contrib/plugins/cache.c
@@ -11,6 +11,8 @@
 
 #include <qemu-plugin.h>
 
+#define STRTOLL(x) g_ascii_strtoll(x, NULL, 10)
+
 QEMU_PLUGIN_EXPORT int qemu_plugin_version = QEMU_PLUGIN_VERSION;
 
 static enum qemu_plugin_mem_rw rw = QEMU_PLUGIN_MEM_RW;
@@ -82,8 +84,9 @@ typedef struct {
     char *disas_str;
     const char *symbol;
     uint64_t addr;
-    uint64_t dmisses;
-    uint64_t imisses;
+    uint64_t l1_dmisses;
+    uint64_t l1_imisses;
+    uint64_t l2_misses;
 } InsnData;
 
 void (*update_hit)(Cache *cache, int set, int blk);
@@ -93,15 +96,22 @@ void (*metadata_init)(Cache *cache);
 void (*metadata_destroy)(Cache *cache);
 
 static int cores;
-static Cache **dcaches, **icaches;
+static Cache **l1_dcaches, **l1_icaches;
+
+static bool use_l2;
+static Cache **l2_ucaches;
 
-static GMutex *dcache_locks;
-static GMutex *icache_locks;
+static GMutex *l1_dcache_locks;
+static GMutex *l1_icache_locks;
+static GMutex *l2_ucache_locks;
 
-static uint64_t all_dmem_accesses;
-static uint64_t all_imem_accesses;
-static uint64_t all_imisses;
-static uint64_t all_dmisses;
+static uint64_t l1_dmem_accesses;
+static uint64_t l1_imem_accesses;
+static uint64_t l1_imisses;
+static uint64_t l1_dmisses;
+
+static uint64_t l2_mem_accesses;
+static uint64_t l2_misses;
 
 static int pow_of_two(int num)
 {
@@ -382,6 +392,7 @@ static void vcpu_mem_access(unsigned int vcpu_index, qemu_plugin_meminfo_t info,
     struct qemu_plugin_hwaddr *hwaddr;
     int cache_idx;
     InsnData *insn;
+    bool hit_in_l1;
 
     hwaddr = qemu_plugin_get_hwaddr(info, vaddr);
     if (hwaddr && qemu_plugin_hwaddr_is_io(hwaddr)) {
@@ -391,14 +402,29 @@ static void vcpu_mem_access(unsigned int vcpu_index, qemu_plugin_meminfo_t info,
     effective_addr = hwaddr ? qemu_plugin_hwaddr_phys_addr(hwaddr) : vaddr;
     cache_idx = vcpu_index % cores;
 
-    g_mutex_lock(&dcache_locks[cache_idx]);
-    if (!access_cache(dcaches[cache_idx], effective_addr)) {
+    g_mutex_lock(&l1_dcache_locks[cache_idx]);
+    hit_in_l1 = access_cache(l1_dcaches[cache_idx], effective_addr);
+    if (!hit_in_l1) {
+        insn = (InsnData *) userdata;
+        __atomic_fetch_add(&insn->l1_dmisses, 1, __ATOMIC_SEQ_CST);
+        l1_dcaches[cache_idx]->misses++;
+    }
+    l1_dcaches[cache_idx]->accesses++;
+    g_mutex_unlock(&l1_dcache_locks[cache_idx]);
+
+    if (hit_in_l1 || !use_l2) {
+        /* No need to access L2 */
+        return;
+    }
+
+    g_mutex_lock(&l2_ucache_locks[cache_idx]);
+    if (!access_cache(l2_ucaches[cache_idx], effective_addr)) {
         insn = (InsnData *) userdata;
-        __atomic_fetch_add(&insn->dmisses, 1, __ATOMIC_SEQ_CST);
-        dcaches[cache_idx]->misses++;
+        __atomic_fetch_add(&insn->l2_misses, 1, __ATOMIC_SEQ_CST);
+        l2_ucaches[cache_idx]->misses++;
     }
-    dcaches[cache_idx]->accesses++;
-    g_mutex_unlock(&dcache_locks[cache_idx]);
+    l2_ucaches[cache_idx]->accesses++;
+    g_mutex_unlock(&l2_ucache_locks[cache_idx]);
 }
 
 static void vcpu_insn_exec(unsigned int vcpu_index, void *userdata)
@@ -406,18 +432,34 @@ static void vcpu_insn_exec(unsigned int vcpu_index, void *userdata)
     uint64_t insn_addr;
     InsnData *insn;
     int cache_idx;
+    bool hit_in_l1;
 
     insn_addr = ((InsnData *) userdata)->addr;
 
     cache_idx = vcpu_index % cores;
-    g_mutex_lock(&icache_locks[cache_idx]);
-    if (!access_cache(icaches[cache_idx], insn_addr)) {
+    g_mutex_lock(&l1_icache_locks[cache_idx]);
+    hit_in_l1 = access_cache(l1_icaches[cache_idx], insn_addr);
+    if (!hit_in_l1) {
+        insn = (InsnData *) userdata;
+        __atomic_fetch_add(&insn->l1_imisses, 1, __ATOMIC_SEQ_CST);
+        l1_icaches[cache_idx]->misses++;
+    }
+    l1_icaches[cache_idx]->accesses++;
+    g_mutex_unlock(&l1_icache_locks[cache_idx]);
+
+    if (hit_in_l1 || !use_l2) {
+        /* No need to access L2 */
+        return;
+    }
+
+    g_mutex_lock(&l2_ucache_locks[cache_idx]);
+    if (!access_cache(l2_ucaches[cache_idx], insn_addr)) {
         insn = (InsnData *) userdata;
-        __atomic_fetch_add(&insn->imisses, 1, __ATOMIC_SEQ_CST);
-        icaches[cache_idx]->misses++;
+        __atomic_fetch_add(&insn->l2_misses, 1, __ATOMIC_SEQ_CST);
+        l2_ucaches[cache_idx]->misses++;
     }
-    icaches[cache_idx]->accesses++;
-    g_mutex_unlock(&icache_locks[cache_idx]);
+    l2_ucaches[cache_idx]->accesses++;
+    g_mutex_unlock(&l2_ucache_locks[cache_idx]);
 }
 
 static void vcpu_tb_trans(qemu_plugin_id_t id, struct qemu_plugin_tb *tb)
@@ -493,30 +535,34 @@ static void caches_free(Cache **caches)
     }
 }
 
-static int dcmp(gconstpointer a, gconstpointer b)
+static void append_stats_line(GString *line, uint64_t l1_daccess,
+                              uint64_t l1_dmisses, uint64_t l1_iaccess,
+                              uint64_t l1_imisses,  uint64_t l2_access,
+                              uint64_t l2_misses)
 {
-    InsnData *insn_a = (InsnData *) a;
-    InsnData *insn_b = (InsnData *) b;
+    double l1_dmiss_rate, l1_imiss_rate, l2_miss_rate;
 
-    return insn_a->dmisses < insn_b->dmisses ? 1 : -1;
-}
+    l1_dmiss_rate = ((double) l1_dmisses) / (l1_daccess) * 100.0;
+    l1_imiss_rate = ((double) l1_imisses) / (l1_iaccess) * 100.0;
 
-static void append_stats_line(GString *line, uint64_t daccess, uint64_t dmisses,
-                              uint64_t iaccess, uint64_t imisses)
-{
-    double dmiss_rate, imiss_rate;
+    g_string_append_printf(line, "%-14lu %-12lu %9.4lf%%  %-14lu %-12lu"
+                           " %9.4lf%%",
+                           l1_daccess,
+                           l1_dmisses,
+                           l1_daccess ? l1_dmiss_rate : 0.0,
+                           l1_iaccess,
+                           l1_imisses,
+                           l1_iaccess ? l1_imiss_rate : 0.0);
 
-    dmiss_rate = ((double) dmisses) / (daccess) * 100.0;
-    imiss_rate = ((double) imisses) / (iaccess) * 100.0;
+    if (use_l2) {
+        l2_miss_rate =  ((double) l2_misses) / (l2_access) * 100.0;
+        g_string_append_printf(line, "  %-12lu %-11lu %10.4lf%%",
+                               l2_access,
+                               l2_misses,
+                               l2_access ? l2_miss_rate : 0.0);
+    }
 
-    g_string_append_printf(line, "%-14lu %-12lu %9.4lf%%  %-14lu %-12lu"
-                           " %9.4lf%%\n",
-                           daccess,
-                           dmisses,
-                           daccess ? dmiss_rate : 0.0,
-                           iaccess,
-                           imisses,
-                           iaccess ? imiss_rate : 0.0);
+    g_string_append(line, "\n");
 }
 
 static void sum_stats(void)
@@ -525,43 +571,74 @@ static void sum_stats(void)
 
     g_assert(cores > 1);
     for (i = 0; i < cores; i++) {
-        all_imisses += icaches[i]->misses;
-        all_dmisses += dcaches[i]->misses;
-        all_imem_accesses += icaches[i]->accesses;
-        all_dmem_accesses += dcaches[i]->accesses;
+        l1_imisses += l1_icaches[i]->misses;
+        l1_dmisses += l1_dcaches[i]->misses;
+        l1_imem_accesses += l1_icaches[i]->accesses;
+        l1_dmem_accesses += l1_dcaches[i]->accesses;
+
+        if (use_l2) {
+            l2_misses += l2_ucaches[i]->misses;
+            l2_mem_accesses += l2_ucaches[i]->accesses;
+        }
     }
 }
 
+static int dcmp(gconstpointer a, gconstpointer b)
+{
+    InsnData *insn_a = (InsnData *) a;
+    InsnData *insn_b = (InsnData *) b;
+
+    return insn_a->l1_dmisses < insn_b->l1_dmisses ? 1 : -1;
+}
+
 static int icmp(gconstpointer a, gconstpointer b)
 {
     InsnData *insn_a = (InsnData *) a;
     InsnData *insn_b = (InsnData *) b;
 
-    return insn_a->imisses < insn_b->imisses ? 1 : -1;
+    return insn_a->l1_imisses < insn_b->l1_imisses ? 1 : -1;
+}
+
+static int l2_cmp(gconstpointer a, gconstpointer b)
+{
+    InsnData *insn_a = (InsnData *) a;
+    InsnData *insn_b = (InsnData *) b;
+
+    return insn_a->l2_misses < insn_b->l2_misses ? 1 : -1;
 }
 
 static void log_stats(void)
 {
     int i;
-    Cache *icache, *dcache;
+    Cache *icache, *dcache, *l2_cache;
 
     g_autoptr(GString) rep = g_string_new("core #, data accesses, data misses,"
                                           " dmiss rate, insn accesses,"
-                                          " insn misses, imiss rate\n");
+                                          " insn misses, imiss rate");
+
+    if (use_l2) {
+        g_string_append(rep, ", l2 accesses, l2 misses, l2 miss rate");
+    }
+
+    g_string_append(rep, "\n");
 
     for (i = 0; i < cores; i++) {
         g_string_append_printf(rep, "%-8d", i);
-        dcache = dcaches[i];
-        icache = icaches[i];
+        dcache = l1_dcaches[i];
+        icache = l1_icaches[i];
+        l2_cache = use_l2 ? l2_ucaches[i] : NULL;
         append_stats_line(rep, dcache->accesses, dcache->misses,
-                icache->accesses, icache->misses);
+                icache->accesses, icache->misses,
+                l2_cache ? l2_cache->accesses : 0,
+                l2_cache ? l2_cache->misses : 0);
     }
 
     if (cores > 1) {
         sum_stats();
         g_string_append_printf(rep, "%-8s", "sum");
-        append_stats_line(rep, all_dmem_accesses, all_dmisses,
-                all_imem_accesses, all_imisses);
+        append_stats_line(rep, l1_dmem_accesses, l1_dmisses,
+                l1_imem_accesses, l1_imisses,
+                l2_cache ? l2_mem_accesses : 0, l2_cache ? l2_misses : 0);
     }
 
     g_string_append(rep, "\n");
@@ -585,7 +662,7 @@ static void log_top_insns(void)
         if (insn->symbol) {
             g_string_append_printf(rep, " (%s)", insn->symbol);
         }
-        g_string_append_printf(rep, ", %ld, %s\n", insn->dmisses,
+        g_string_append_printf(rep, ", %ld, %s\n", insn->l1_dmisses,
                                insn->disas_str);
     }
 
@@ -598,10 +675,28 @@ static void log_top_insns(void)
         if (insn->symbol) {
             g_string_append_printf(rep, " (%s)", insn->symbol);
         }
-        g_string_append_printf(rep, ", %ld, %s\n", insn->imisses,
+        g_string_append_printf(rep, ", %ld, %s\n", insn->l1_imisses,
                                insn->disas_str);
     }
 
+    if (!use_l2) {
+        goto finish;
+    }
+
+    miss_insns = g_list_sort(miss_insns, l2_cmp);
+    g_string_append_printf(rep, "%s", "\naddress, L2 misses, instruction\n");
+
+    for (curr = miss_insns, i = 0; curr && i < limit; i++, curr = curr->next) {
+        insn = (InsnData *) curr->data;
+        g_string_append_printf(rep, "0x%" PRIx64, insn->addr);
+        if (insn->symbol) {
+            g_string_append_printf(rep, " (%s)", insn->symbol);
+        }
+        g_string_append_printf(rep, ", %ld, %s\n", insn->l2_misses,
+                               insn->disas_str);
+    }
+
+finish:
     qemu_plugin_outs(rep->str);
     g_list_free(miss_insns);
 }
@@ -611,8 +706,16 @@ static void plugin_exit(qemu_plugin_id_t id, void *p)
     log_stats();
     log_top_insns();
 
-    caches_free(dcaches);
-    caches_free(icaches);
+    caches_free(l1_dcaches);
+    caches_free(l1_icaches);
+
+    g_free(l1_dcache_locks);
+    g_free(l1_icache_locks);
+
+    if (use_l2) {
+        caches_free(l2_ucaches);
+        g_free(l2_ucache_locks);
+    }
 
     g_hash_table_destroy(miss_ht);
 }
@@ -644,19 +747,24 @@ int qemu_plugin_install(qemu_plugin_id_t id, const qemu_info_t *info,
                         int argc, char **argv)
 {
     int i;
-    int iassoc, iblksize, icachesize;
-    int dassoc, dblksize, dcachesize;
+    int l1_iassoc, l1_iblksize, l1_icachesize;
+    int l1_dassoc, l1_dblksize, l1_dcachesize;
+    int l2_assoc, l2_blksize, l2_cachesize;
 
     limit = 32;
     sys = info->system_emulation;
 
-    dassoc = 8;
-    dblksize = 64;
-    dcachesize = dblksize * dassoc * 32;
+    l1_dassoc = 8;
+    l1_dblksize = 64;
+    l1_dcachesize = l1_dblksize * l1_dassoc * 32;
 
-    iassoc = 8;
-    iblksize = 64;
-    icachesize = iblksize * iassoc * 32;
+    l1_iassoc = 8;
+    l1_iblksize = 64;
+    l1_icachesize = l1_iblksize * l1_iassoc * 32;
+
+    l2_assoc = 16;
+    l2_blksize = 64;
+    l2_cachesize = l2_assoc * l2_blksize * 2048;
 
     policy = LRU;
 
@@ -664,29 +772,44 @@ int qemu_plugin_install(qemu_plugin_id_t id, const qemu_info_t *info,
 
     for (i = 0; i < argc; i++) {
         char *opt = argv[i];
-        if (g_str_has_prefix(opt, "iblksize=")) {
-            iblksize = g_ascii_strtoll(opt + 9, NULL, 10);
-        } else if (g_str_has_prefix(opt, "iassoc=")) {
-            iassoc = g_ascii_strtoll(opt + 7, NULL, 10);
-        } else if (g_str_has_prefix(opt, "icachesize=")) {
-            icachesize = g_ascii_strtoll(opt + 11, NULL, 10);
-        } else if (g_str_has_prefix(opt, "dblksize=")) {
-            dblksize = g_ascii_strtoll(opt + 9, NULL, 10);
-        } else if (g_str_has_prefix(opt, "dassoc=")) {
-            dassoc = g_ascii_strtoll(opt + 7, NULL, 10);
-        } else if (g_str_has_prefix(opt, "dcachesize=")) {
-            dcachesize = g_ascii_strtoll(opt + 11, NULL, 10);
-        } else if (g_str_has_prefix(opt, "limit=")) {
-            limit = g_ascii_strtoll(opt + 6, NULL, 10);
-        } else if (g_str_has_prefix(opt, "cores=")) {
-            cores = g_ascii_strtoll(opt + 6, NULL, 10);
-        } else if (g_str_has_prefix(opt, "evict=")) {
-            gchar *p = opt + 6;
-            if (g_strcmp0(p, "rand") == 0) {
+        g_autofree char **tokens = g_strsplit(opt, "=", 2);
+
+        if (g_strcmp0(tokens[0], "iblksize") == 0) {
+            l1_iblksize = STRTOLL(tokens[1]);
+        } else if (g_strcmp0(tokens[0], "iassoc") == 0) {
+            l1_iassoc = STRTOLL(tokens[1]);
+        } else if (g_strcmp0(tokens[0], "icachesize") == 0) {
+            l1_icachesize = STRTOLL(tokens[1]);
+        } else if (g_strcmp0(tokens[0], "dblksize") == 0) {
+            l1_dblksize = STRTOLL(tokens[1]);
+        } else if (g_strcmp0(tokens[0], "dassoc") == 0) {
+            l1_dassoc = STRTOLL(tokens[1]);
+        } else if (g_strcmp0(tokens[0], "dcachesize") == 0) {
+            l1_dcachesize = STRTOLL(tokens[1]);
+        } else if (g_strcmp0(tokens[0], "limit") == 0) {
+            limit = STRTOLL(tokens[1]);
+        } else if (g_strcmp0(tokens[0], "cores") == 0) {
+            cores = STRTOLL(tokens[1]);
+        } else if (g_strcmp0(tokens[0], "l2cachesize") == 0) {
+            use_l2 = true;
+            l2_cachesize = STRTOLL(tokens[1]);
+        } else if (g_strcmp0(tokens[0], "l2blksize") == 0) {
+            use_l2 = true;
+            l2_blksize = STRTOLL(tokens[1]);
+        } else if (g_strcmp0(tokens[0], "l2assoc") == 0) {
+            use_l2 = true;
+            l2_assoc = STRTOLL(tokens[1]);
+        } else if (g_strcmp0(tokens[0], "l2") == 0) {
+            if (!qemu_plugin_bool_parse(tokens[0], tokens[1], &use_l2)) {
+                fprintf(stderr, "boolean argument parsing failed: %s\n", opt);
+                return -1;
+            }
+        } else if (g_strcmp0(tokens[0], "evict") == 0) {
+            if (g_strcmp0(tokens[1], "rand") == 0) {
                 policy = RAND;
-            } else if (g_strcmp0(p, "lru") == 0) {
+            } else if (g_strcmp0(tokens[1], "lru") == 0) {
                 policy = LRU;
-            } else if (g_strcmp0(p, "fifo") == 0) {
+            } else if (g_strcmp0(tokens[1], "fifo") == 0) {
                 policy = FIFO;
             } else {
                 fprintf(stderr, "invalid eviction policy: %s\n", opt);
@@ -700,24 +823,33 @@ int qemu_plugin_install(qemu_plugin_id_t id, const qemu_info_t *info,
 
     policy_init();
 
-    dcaches = caches_init(dblksize, dassoc, dcachesize);
-    if (!dcaches) {
-        const char *err = cache_config_error(dblksize, dassoc, dcachesize);
+    l1_dcaches = caches_init(l1_dblksize, l1_dassoc, l1_dcachesize);
+    if (!l1_dcaches) {
+        const char *err = cache_config_error(l1_dblksize, l1_dassoc, l1_dcachesize);
         fprintf(stderr, "dcache cannot be constructed from given parameters\n");
         fprintf(stderr, "%s\n", err);
         return -1;
     }
 
-    icaches = caches_init(iblksize, iassoc, icachesize);
-    if (!icaches) {
-        const char *err = cache_config_error(iblksize, iassoc, icachesize);
+    l1_icaches = caches_init(l1_iblksize, l1_iassoc, l1_icachesize);
+    if (!l1_icaches) {
+        const char *err = cache_config_error(l1_iblksize, l1_iassoc, l1_icachesize);
         fprintf(stderr, "icache cannot be constructed from given parameters\n");
         fprintf(stderr, "%s\n", err);
         return -1;
     }
 
-    dcache_locks = g_new0(GMutex, cores);
-    icache_locks = g_new0(GMutex, cores);
+    l2_ucaches = use_l2 ? caches_init(l2_blksize, l2_assoc, l2_cachesize) : NULL;
+    if (!l2_ucaches && use_l2) {
+        const char *err = cache_config_error(l2_blksize, l2_assoc, l2_cachesize);
+        fprintf(stderr, "L2 cache cannot be constructed from given parameters\n");
+        fprintf(stderr, "%s\n", err);
+        return -1;
+    }
+
+    l1_dcache_locks = g_new0(GMutex, cores);
+    l1_icache_locks = g_new0(GMutex, cores);
+    l2_ucache_locks = use_l2 ? g_new0(GMutex, cores) : NULL;
 
     qemu_plugin_register_vcpu_tb_trans_cb(id, vcpu_tb_trans);
     qemu_plugin_register_atexit_cb(id, plugin_exit, NULL);