x86 and machine queue, 2017-10-09

Includes x86, QOM, CPU, and option/config parsing patches.
 
 Highlights:
 * Deprecation of -nodefconfig option;
 * MachineClass::valid_cpu_types field.
 -----BEGIN PGP SIGNATURE-----
 
 iQIcBAABCAAGBQJZ3DEFAAoJECgHk2+YTcWmpt8P/i1kLznQXcan4XR5PBmxYbke
 klAzocUhm5ZP4sLJCTRXgvKgxvtLKigGO2J5X7NBdCYyyltDL1H2/UQcLtGgmvZH
 0Kz8I+euGUCbjhWiwSsNlAj1YiNxCuiAlQp0ixRrA1wmATAx0sWZ9mAtSa73lQSz
 Sz1y1yskHBP4Z7TbIYnmdpk/z+ZyeeSG9jGA5+az9WBUKjunb7RIOr61rrNCrIzq
 fL69n9+RcG5lqGg4DcFSlsOIOOjUuC4n63rEXM8lFhjSRR2PFKiNulNlSFVIpV4O
 lPJCArM2bq+wOmDr4Llteq42W3zhESAR4oeIR2wBvr8CBxpGlX3Ubkxvi5J/+Z6m
 nImvTsRWO4FInBqrnueD80Tke0dPjIivUEs7NVmqQTKHHL6DZ1GlZiAepZxqYgWL
 S7SmPYD6Nfg6Quf+x1aPQ9RHbycDe1Y86gYCmS07RIczLGYEylAv4GgZ6Wnc8I6A
 xn3MvNGTxBOKikGJOVvO/jJ9BMq/LnOYLbOMHSNnUiJ40dB6d+AKsUN32yo5FLv8
 HEkJcjKXsT6sV6UuKIZW1VLa0vkJ3oB0Z2WXL/vTn+BK6w/54rnxfr9D9glfOCDZ
 mvExz74L+rJOvONt1RIK3wQTZzfTV70mT3/Hx2A5W0XSWADaeGE4v+kxnX0yqqFh
 1mFBBY64PrkTtLZeasqA
 =Tqiv
 -----END PGP SIGNATURE-----

Merge remote-tracking branch 'remotes/ehabkost/tags/x86-and-machine-pull-request' into staging

x86 and machine queue, 2017-10-09

Includes x86, QOM, CPU, and option/config parsing patches.

Highlights:
* Deprecation of -nodefconfig option;
* MachineClass::valid_cpu_types field.

# gpg: Signature made Tue 10 Oct 2017 03:31:33 BST
# gpg:                using RSA key 0x2807936F984DC5A6
# gpg: Good signature from "Eduardo Habkost <ehabkost@redhat.com>"
# Primary key fingerprint: 5A32 2FD5 ABC4 D3DB ACCF  D1AA 2807 936F 984D C5A6

* remotes/ehabkost/tags/x86-and-machine-pull-request:
  x86: Correct translation of some rdgsbase and wrgsbase encodings
  vl: exit if maxcpus is negative
  qom: update doc comment for type_register[_static]()
  config: qemu_config_parse() return number of config groups
  qemu-options: Deprecate -nodefconfig
  vl: Eliminate defconfig variable
  machine: Add a valid_cpu_types property
  qom/cpu: move cpu_model null check to cpu_class_by_name()

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

block/blkdebug.c

@@ -244,7 +244,6 @@ static int read_config(BDRVBlkdebugState *s, const char *filename,
         ret = qemu_config_parse(f, config_groups, filename);
         if (ret < 0) {
             error_setg(errp, "Could not parse blkdebug config file");
-            ret = -EINVAL;
             goto fail;
         }
     }

hw/core/machine.c

@@ -758,6 +758,38 @@ void machine_run_board_init(MachineState *machine)
     if (nb_numa_nodes) {
         machine_numa_finish_init(machine);
     }
+
+    /* If the machine supports the valid_cpu_types check and the user
+     * specified a CPU with -cpu check here that the user CPU is supported.
+     */
+    if (machine_class->valid_cpu_types && machine->cpu_type) {
+        ObjectClass *class = object_class_by_name(machine->cpu_type);
+        int i;
+
+        for (i = 0; machine_class->valid_cpu_types[i]; i++) {
+            if (object_class_dynamic_cast(class,
+                                          machine_class->valid_cpu_types[i])) {
+                /* The user specificed CPU is in the valid field, we are
+                 * good to go.
+                 */
+                break;
+            }
+        }
+
+        if (!machine_class->valid_cpu_types[i]) {
+            /* The user specified CPU is not valid */
+            error_report("Invalid CPU type: %s", machine->cpu_type);
+            error_printf("The valid types are: %s",
+                         machine_class->valid_cpu_types[0]);
+            for (i = 1; machine_class->valid_cpu_types[i]; i++) {
+                error_printf(", %s", machine_class->valid_cpu_types[i]);
+            }
+            error_printf("\n");
+
+            exit(1);
+        }
+    }
+
     machine_class->init(machine);
 }
 

include/hw/boards.h

@@ -191,6 +191,7 @@ struct MachineClass {
     bool has_hotpluggable_cpus;
     bool ignore_memory_transaction_failures;
     int numa_mem_align_shift;
+    const char **valid_cpu_types;
     void (*numa_auto_assign_ram)(MachineClass *mc, NodeInfo *nodes,
                                  int nb_nodes, ram_addr_t size);
 

include/qom/object.h

@@ -773,7 +773,7 @@ const char *object_get_typename(const Object *obj);
  * @info and all of the strings it points to should exist for the life time
  * that the type is registered.
  *
- * Returns: 0 on failure, the new #Type on success.
+ * Returns: the new #Type.
  */
 Type type_register_static(const TypeInfo *info);
 
@@ -784,7 +784,7 @@ Type type_register_static(const TypeInfo *info);
  * Unlike type_register_static(), this call does not require @info or its
  * string members to continue to exist after the call returns.
  *
- * Returns: 0 on failure, the new #Type on success.
+ * Returns: the new #Type.
  */
 Type type_register(const TypeInfo *info);
 

include/sysemu/sysemu.h

@@ -113,7 +113,7 @@ extern int win2k_install_hack;
 extern int alt_grab;
 extern int ctrl_grab;
 extern int smp_cpus;
-extern int max_cpus;
+extern unsigned int max_cpus;
 extern int cursor_hide;
 extern int graphic_rotate;
 extern int no_quit;

qemu-doc.texi

@@ -2496,6 +2496,10 @@ would automatically enable USB support on the machine type.
 If using the new syntax, USB support must be explicitly
 enabled via the ``-machine usb=on'' argument.
 
+@subsection -nodefconfig (since 2.11.0)
+
+The ``-nodefconfig`` argument is a synonym for ``-no-user-config``.
+
 @section qemu-img command line arguments
 
 @subsection convert -s (since 2.0.0)

qemu-options.hx

@@ -4067,26 +4067,17 @@ Write device configuration to @var{file}. The @var{file} can be either filename
 command line and device configuration into file or dash @code{-}) character to print the
 output to stdout. This can be later used as input file for @code{-readconfig} option.
 ETEXI
-DEF("nodefconfig", 0, QEMU_OPTION_nodefconfig,
+HXCOMM Deprecated, same as -no-user-config
-    "-nodefconfig\n"
+DEF("nodefconfig", 0, QEMU_OPTION_nodefconfig, "", QEMU_ARCH_ALL)
-    "                do not load default config files at startup\n",
-    QEMU_ARCH_ALL)
-STEXI
-@item -nodefconfig
-@findex -nodefconfig
-Normally QEMU loads configuration files from @var{sysconfdir} and @var{datadir} at startup.
-The @code{-nodefconfig} option will prevent QEMU from loading any of those config files.
-ETEXI
 DEF("no-user-config", 0, QEMU_OPTION_nouserconfig,
     "-no-user-config\n"
-    "                do not load user-provided config files at startup\n",
+    "                do not load default user-provided config files at startup\n",
     QEMU_ARCH_ALL)
 STEXI
 @item -no-user-config
 @findex -no-user-config
 The @code{-no-user-config} option makes QEMU not load any of the user-provided
-config files on @var{sysconfdir}, but won't make it skip the QEMU-provided config
+config files on @var{sysconfdir}.
-files from @var{datadir}.
 ETEXI
 DEF("trace", HAS_ARG, QEMU_OPTION_trace,
     "-trace [[enable=]<pattern>][,events=<file>][,file=<file>]\n"

qom/cpu.c

@@ -316,7 +316,12 @@ static bool cpu_common_has_work(CPUState *cs)
 
 ObjectClass *cpu_class_by_name(const char *typename, const char *cpu_model)
 {
-    CPUClass *cc = CPU_CLASS(object_class_by_name(typename));
+    CPUClass *cc;
+
+    if (!cpu_model) {
+        return NULL;
+    }
+    cc = CPU_CLASS(object_class_by_name(typename));
 
     return cc->class_by_name(cpu_model);
 }

target/alpha/cpu.c

@@ -127,14 +127,10 @@ static const AlphaCPUAlias alpha_cpu_aliases[] = {
 
 static ObjectClass *alpha_cpu_class_by_name(const char *cpu_model)
 {
-    ObjectClass *oc = NULL;
+    ObjectClass *oc;
     char *typename;
     int i;
 
-    if (cpu_model == NULL) {
-        return NULL;
-    }
-
     oc = object_class_by_name(cpu_model);
     if (oc != NULL && object_class_dynamic_cast(oc, TYPE_ALPHA_CPU) != NULL &&
         !object_class_is_abstract(oc)) {

target/arm/cpu.c

@@ -939,10 +939,6 @@ static ObjectClass *arm_cpu_class_by_name(const char *cpu_model)
     char *typename;
     char **cpuname;
 
-    if (!cpu_model) {
-        return NULL;
-    }
-
     cpuname = g_strsplit(cpu_model, ",", 1);
     typename = g_strdup_printf(ARM_CPU_TYPE_NAME("%s"), cpuname[0]);
     oc = object_class_by_name(typename);

target/cris/cpu.c

@@ -69,10 +69,6 @@ static ObjectClass *cris_cpu_class_by_name(const char *cpu_model)
     ObjectClass *oc;
     char *typename;
 
-    if (cpu_model == NULL) {
-        return NULL;
-    }
-
 #if defined(CONFIG_USER_ONLY)
     if (strcasecmp(cpu_model, "any") == 0) {
         return object_class_by_name("crisv32-" TYPE_CRIS_CPU);

target/i386/translate.c

@@ -8155,9 +8155,9 @@ static target_ulong disas_insn(DisasContext *s, CPUState *cpu)
             break;
 
         case 0xc0 ... 0xc7: /* rdfsbase (f3 0f ae /0) */
-        case 0xc8 ... 0xc8: /* rdgsbase (f3 0f ae /1) */
+        case 0xc8 ... 0xcf: /* rdgsbase (f3 0f ae /1) */
         case 0xd0 ... 0xd7: /* wrfsbase (f3 0f ae /2) */
-        case 0xd8 ... 0xd8: /* wrgsbase (f3 0f ae /3) */
+        case 0xd8 ... 0xdf: /* wrgsbase (f3 0f ae /3) */
             if (CODE64(s)
                 && (prefixes & PREFIX_REPZ)
                 && !(prefixes & PREFIX_LOCK)

target/lm32/cpu.c

@@ -246,10 +246,6 @@ static ObjectClass *lm32_cpu_class_by_name(const char *cpu_model)
     ObjectClass *oc;
     char *typename;
 
-    if (cpu_model == NULL) {
-        return NULL;
-    }
-
     typename = g_strdup_printf("%s-" TYPE_LM32_CPU, cpu_model);
     oc = object_class_by_name(typename);
     g_free(typename);

target/m68k/cpu.c

@@ -87,10 +87,6 @@ static ObjectClass *m68k_cpu_class_by_name(const char *cpu_model)
     ObjectClass *oc;
     char *typename;
 
-    if (cpu_model == NULL) {
-        return NULL;
-    }
-
     typename = g_strdup_printf("%s-" TYPE_M68K_CPU, cpu_model);
     oc = object_class_by_name(typename);
     g_free(typename);

target/mips/cpu.c

@@ -166,10 +166,6 @@ static ObjectClass *mips_cpu_class_by_name(const char *cpu_model)
     ObjectClass *oc;
     char *typename;
 
-    if (cpu_model == NULL) {
-        return NULL;
-    }
-
     typename = mips_cpu_type_name(cpu_model);
     oc = object_class_by_name(typename);
     g_free(typename);

target/moxie/cpu.c

@@ -89,13 +89,7 @@ static void moxie_cpu_initfn(Object *obj)
 
 static ObjectClass *moxie_cpu_class_by_name(const char *cpu_model)
 {
-    ObjectClass *oc;
+    ObjectClass *oc = object_class_by_name(cpu_model);
-
-    if (cpu_model == NULL) {
-        return NULL;
-    }
-
-    oc = object_class_by_name(cpu_model);
     if (oc != NULL && (!object_class_dynamic_cast(oc, TYPE_MOXIE_CPU) ||
                        object_class_is_abstract(oc))) {
         return NULL;

target/openrisc/cpu.c

@@ -108,10 +108,6 @@ static ObjectClass *openrisc_cpu_class_by_name(const char *cpu_model)
     ObjectClass *oc;
     char *typename;
 
-    if (cpu_model == NULL) {
-        return NULL;
-    }
-
     typename = g_strdup_printf("%s-" TYPE_OPENRISC_CPU, cpu_model);
     oc = object_class_by_name(typename);
     g_free(typename);

target/sh4/cpu.c

@@ -133,9 +133,6 @@ static ObjectClass *superh_cpu_class_by_name(const char *cpu_model)
     ObjectClass *oc;
     GSList *list, *item;
 
-    if (cpu_model == NULL) {
-        return NULL;
-    }
     if (strcasecmp(cpu_model, "any") == 0) {
         return object_class_by_name(TYPE_SH7750R_CPU);
     }

target/sparc/cpu.c

@@ -730,10 +730,6 @@ static ObjectClass *sparc_cpu_class_by_name(const char *cpu_model)
     ObjectClass *oc;
     char *typename;
 
-    if (cpu_model == NULL) {
-        return NULL;
-    }
-
     typename = sparc_cpu_type_name(cpu_model);
     oc = object_class_by_name(typename);
     g_free(typename);

target/tricore/cpu.c

@@ -120,10 +120,6 @@ static ObjectClass *tricore_cpu_class_by_name(const char *cpu_model)
     ObjectClass *oc;
     char *typename;
 
-    if (!cpu_model) {
-        return NULL;
-    }
-
     typename = g_strdup_printf("%s-" TYPE_TRICORE_CPU, cpu_model);
     oc = object_class_by_name(typename);
     g_free(typename);

target/unicore32/cpu.c

@@ -44,10 +44,6 @@ static ObjectClass *uc32_cpu_class_by_name(const char *cpu_model)
     ObjectClass *oc;
     char *typename;
 
-    if (cpu_model == NULL) {
-        return NULL;
-    }
-
     typename = g_strdup_printf("%s-" TYPE_UNICORE32_CPU, cpu_model);
     oc = object_class_by_name(typename);
     g_free(typename);

target/xtensa/cpu.c

@@ -83,10 +83,6 @@ static ObjectClass *xtensa_cpu_class_by_name(const char *cpu_model)
     ObjectClass *oc;
     char *typename;
 
-    if (cpu_model == NULL) {
-        return NULL;
-    }
-
     typename = g_strdup_printf("%s-" TYPE_XTENSA_CPU, cpu_model);
     oc = object_class_by_name(typename);
     g_free(typename);

util/qemu-config.c

@@ -385,6 +385,7 @@ void qemu_config_write(FILE *fp)
     }
 }
 
+/* Returns number of config groups on success, -errno on error */
 int qemu_config_parse(FILE *fp, QemuOptsList **lists, const char *fname)
 {
     char line[1024], group[64], id[64], arg[64], value[1024];
@@ -392,7 +393,8 @@ int qemu_config_parse(FILE *fp, QemuOptsList **lists, const char *fname)
     QemuOptsList *list = NULL;
     Error *local_err = NULL;
     QemuOpts *opts = NULL;
-    int res = -1, lno = 0;
+    int res = -EINVAL, lno = 0;
+    int count = 0;
 
     loc_push_none(&loc);
     while (fgets(line, sizeof(line), fp) != NULL) {
@@ -413,6 +415,7 @@ int qemu_config_parse(FILE *fp, QemuOptsList **lists, const char *fname)
                 goto out;
             }
             opts = qemu_opts_create(list, id, 1, NULL);
+            count++;
             continue;
         }
         if (sscanf(line, "[%63[^]]]", group) == 1) {
@@ -423,6 +426,7 @@ int qemu_config_parse(FILE *fp, QemuOptsList **lists, const char *fname)
                 goto out;
             }
             opts = qemu_opts_create(list, NULL, 0, &error_abort);
+            count++;
             continue;
         }
         value[0] = '\0';
@@ -447,7 +451,7 @@ int qemu_config_parse(FILE *fp, QemuOptsList **lists, const char *fname)
         error_report("error reading file");
         goto out;
     }
-    res = 0;
+    res = count;
 out:
     loc_pop(&loc);
     return res;
@@ -464,12 +468,7 @@ int qemu_read_config_file(const char *filename)
 
     ret = qemu_config_parse(f, vm_config_groups, filename);
     fclose(f);
-
+    return ret;
-    if (ret == 0) {
-        return 0;
-    } else {
-        return -EINVAL;
-    }
 }
 
 static void config_parse_qdict_section(QDict *options, QemuOptsList *opts,

vl.c

@@ -161,7 +161,7 @@ Chardev *sclp_hds[MAX_SCLP_CONSOLES];
 int win2k_install_hack = 0;
 int singlestep = 0;
 int smp_cpus = 1;
-int max_cpus = 1;
+unsigned int max_cpus = 1;
 int smp_cores = 1;
 int smp_threads = 1;
 int acpi_enabled = 1;
@@ -3111,7 +3111,6 @@ int main(int argc, char **argv, char **envp)
     const char *qtest_log = NULL;
     const char *pid_file = NULL;
     const char *incoming = NULL;
-    bool defconfig = true;
     bool userconfig = true;
     bool nographic = false;
     DisplayType display_type = DT_DEFAULT;
@@ -3213,8 +3212,6 @@ int main(int argc, char **argv, char **envp)
             popt = lookup_opt(argc, argv, &optarg, &optind);
             switch (popt->index) {
             case QEMU_OPTION_nodefconfig:
-                defconfig = false;
-                break;
             case QEMU_OPTION_nouserconfig:
                 userconfig = false;
                 break;
@@ -3222,7 +3219,7 @@ int main(int argc, char **argv, char **envp)
         }
     }
 
-    if (defconfig && userconfig) {
+    if (userconfig) {
         if (qemu_read_default_config_file() < 0) {
             exit(1);
         }
@@ -4334,8 +4331,8 @@ int main(int argc, char **argv, char **envp)
 
     machine_class->max_cpus = machine_class->max_cpus ?: 1; /* Default to UP */
     if (max_cpus > machine_class->max_cpus) {
-        error_report("Number of SMP CPUs requested (%d) exceeds max CPUs "
+        error_report("Invalid SMP CPUs %d. The max CPUs "
-                     "supported by machine '%s' (%d)", max_cpus,
+                     "supported by machine '%s' is %d", max_cpus,
                      machine_class->name, machine_class->max_cpus);
         exit(1);
     }