Patchwork [17/37] target-i386: Replace uint32_t vendor fields by vendor string in x86_def_t

login
register
mail settings
Submitter Andreas Färber
Date Jan. 28, 2013, 4:18 p.m.
Message ID <1359389934-16663-18-git-send-email-afaerber@suse.de>
Download mbox | patch
Permalink /patch/216251/
State New
Headers show

Comments

Andreas Färber - Jan. 28, 2013, 4:18 p.m.
From: Igor Mammedov <imammedo@redhat.com>

Vendor property setter takes string as vendor value but cpudefs
use uint32_t vendor[123] fields to define vendor value. It makes it
difficult to unify and use property setter for values from cpudefs.

Simplify code by using vendor property setter, vendor[123] fields
are converted into vendor[13] array to keep its value. And vendor
property setter is used to access/set value on CPU.

 - Make for() cycle reusable for the next patch by adding
   x86_cpu_vendor_words2str()

Intel's CPUID spec[1] says:
"
5.1.1 ...
These registers contain the ASCII string: GenuineIntel
...
"

List[2] of known vendor values shows that they all are 12 ASCII
characters long, padded where necessary with space.

Current supported values are all ASCII characters packed in
ebx, edx, ecx. So lets state that QEMU supports 12 printable ASCII
characters packed in ebx, edx, ecx registers for cpuid(0) instruction.

*1 - http://www.intel.com/Assets/PDF/appnote/241618.pdf
*2 - http://en.wikipedia.org/wiki/CPUID#EAX.3D0:_Get_vendor_ID

Signed-off-by: Igor Mammedov <imammedo@redhat.com>
Signed-off-by: Andreas Färber <afaerber@suse.de>
---
 target-i386/cpu.c |  147 ++++++++++++++++-------------------------------------
 target-i386/cpu.h |    6 +--
 2 Dateien geändert, 47 Zeilen hinzugefügt(+), 106 Zeilen entfernt(-)

Patch

diff --git a/target-i386/cpu.c b/target-i386/cpu.c
index b75ea9f..043a21d 100644
--- a/target-i386/cpu.c
+++ b/target-i386/cpu.c
@@ -47,6 +47,18 @@ 
 #include "hw/apic_internal.h"
 #endif
 
+static void x86_cpu_vendor_words2str(char *dst, uint32_t vendor1,
+                                     uint32_t vendor2, uint32_t vendor3)
+{
+    int i;
+    for (i = 0; i < 4; i++) {
+        dst[i] = vendor1 >> (8 * i);
+        dst[i + 4] = vendor2 >> (8 * i);
+        dst[i + 8] = vendor3 >> (8 * i);
+    }
+    dst[CPUID_VENDOR_SZ] = '\0';
+}
+
 /* feature flags taken from "Intel Processor Identification and the CPUID
  * Instruction" and AMD's "CPUID Specification".  In cases of disagreement
  * between feature naming conventions, aliases may be added.
@@ -337,7 +349,8 @@  static void add_flagname_to_bitmaps(const char *flagname,
 typedef struct x86_def_t {
     const char *name;
     uint32_t level;
-    uint32_t vendor1, vendor2, vendor3;
+    /* vendor is zero-terminated, 12 character ASCII string */
+    char vendor[CPUID_VENDOR_SZ + 1];
     int family;
     int model;
     int stepping;
@@ -398,9 +411,7 @@  static x86_def_t builtin_x86_defs[] = {
     {
         .name = "qemu64",
         .level = 4,
-        .vendor1 = CPUID_VENDOR_AMD_1,
-        .vendor2 = CPUID_VENDOR_AMD_2,
-        .vendor3 = CPUID_VENDOR_AMD_3,
+        .vendor = CPUID_VENDOR_AMD,
         .family = 6,
         .model = 2,
         .stepping = 3,
@@ -417,9 +428,7 @@  static x86_def_t builtin_x86_defs[] = {
     {
         .name = "phenom",
         .level = 5,
-        .vendor1 = CPUID_VENDOR_AMD_1,
-        .vendor2 = CPUID_VENDOR_AMD_2,
-        .vendor3 = CPUID_VENDOR_AMD_3,
+        .vendor = CPUID_VENDOR_AMD,
         .family = 16,
         .model = 2,
         .stepping = 3,
@@ -445,9 +454,7 @@  static x86_def_t builtin_x86_defs[] = {
     {
         .name = "core2duo",
         .level = 10,
-        .vendor1 = CPUID_VENDOR_INTEL_1,
-        .vendor2 = CPUID_VENDOR_INTEL_2,
-        .vendor3 = CPUID_VENDOR_INTEL_3,
+        .vendor = CPUID_VENDOR_INTEL,
         .family = 6,
         .model = 15,
         .stepping = 11,
@@ -466,9 +473,7 @@  static x86_def_t builtin_x86_defs[] = {
     {
         .name = "kvm64",
         .level = 5,
-        .vendor1 = CPUID_VENDOR_INTEL_1,
-        .vendor2 = CPUID_VENDOR_INTEL_2,
-        .vendor3 = CPUID_VENDOR_INTEL_3,
+        .vendor = CPUID_VENDOR_INTEL,
         .family = 15,
         .model = 6,
         .stepping = 1,
@@ -492,9 +497,7 @@  static x86_def_t builtin_x86_defs[] = {
     {
         .name = "qemu32",
         .level = 4,
-        .vendor1 = CPUID_VENDOR_INTEL_1,
-        .vendor2 = CPUID_VENDOR_INTEL_2,
-        .vendor3 = CPUID_VENDOR_INTEL_3,
+        .vendor = CPUID_VENDOR_INTEL,
         .family = 6,
         .model = 3,
         .stepping = 3,
@@ -505,9 +508,7 @@  static x86_def_t builtin_x86_defs[] = {
     {
         .name = "kvm32",
         .level = 5,
-        .vendor1 = CPUID_VENDOR_INTEL_1,
-        .vendor2 = CPUID_VENDOR_INTEL_2,
-        .vendor3 = CPUID_VENDOR_INTEL_3,
+        .vendor = CPUID_VENDOR_INTEL,
         .family = 15,
         .model = 6,
         .stepping = 1,
@@ -522,9 +523,7 @@  static x86_def_t builtin_x86_defs[] = {
     {
         .name = "coreduo",
         .level = 10,
-        .vendor1 = CPUID_VENDOR_INTEL_1,
-        .vendor2 = CPUID_VENDOR_INTEL_2,
-        .vendor3 = CPUID_VENDOR_INTEL_3,
+        .vendor = CPUID_VENDOR_INTEL,
         .family = 6,
         .model = 14,
         .stepping = 8,
@@ -540,9 +539,7 @@  static x86_def_t builtin_x86_defs[] = {
     {
         .name = "486",
         .level = 1,
-        .vendor1 = CPUID_VENDOR_INTEL_1,
-        .vendor2 = CPUID_VENDOR_INTEL_2,
-        .vendor3 = CPUID_VENDOR_INTEL_3,
+        .vendor = CPUID_VENDOR_INTEL,
         .family = 4,
         .model = 0,
         .stepping = 0,
@@ -552,9 +549,7 @@  static x86_def_t builtin_x86_defs[] = {
     {
         .name = "pentium",
         .level = 1,
-        .vendor1 = CPUID_VENDOR_INTEL_1,
-        .vendor2 = CPUID_VENDOR_INTEL_2,
-        .vendor3 = CPUID_VENDOR_INTEL_3,
+        .vendor = CPUID_VENDOR_INTEL,
         .family = 5,
         .model = 4,
         .stepping = 3,
@@ -564,9 +559,7 @@  static x86_def_t builtin_x86_defs[] = {
     {
         .name = "pentium2",
         .level = 2,
-        .vendor1 = CPUID_VENDOR_INTEL_1,
-        .vendor2 = CPUID_VENDOR_INTEL_2,
-        .vendor3 = CPUID_VENDOR_INTEL_3,
+        .vendor = CPUID_VENDOR_INTEL,
         .family = 6,
         .model = 5,
         .stepping = 2,
@@ -576,9 +569,7 @@  static x86_def_t builtin_x86_defs[] = {
     {
         .name = "pentium3",
         .level = 2,
-        .vendor1 = CPUID_VENDOR_INTEL_1,
-        .vendor2 = CPUID_VENDOR_INTEL_2,
-        .vendor3 = CPUID_VENDOR_INTEL_3,
+        .vendor = CPUID_VENDOR_INTEL,
         .family = 6,
         .model = 7,
         .stepping = 3,
@@ -588,9 +579,7 @@  static x86_def_t builtin_x86_defs[] = {
     {
         .name = "athlon",
         .level = 2,
-        .vendor1 = CPUID_VENDOR_AMD_1,
-        .vendor2 = CPUID_VENDOR_AMD_2,
-        .vendor3 = CPUID_VENDOR_AMD_3,
+        .vendor = CPUID_VENDOR_AMD,
         .family = 6,
         .model = 2,
         .stepping = 3,
@@ -604,9 +593,7 @@  static x86_def_t builtin_x86_defs[] = {
         .name = "n270",
         /* original is on level 10 */
         .level = 5,
-        .vendor1 = CPUID_VENDOR_INTEL_1,
-        .vendor2 = CPUID_VENDOR_INTEL_2,
-        .vendor3 = CPUID_VENDOR_INTEL_3,
+        .vendor = CPUID_VENDOR_INTEL,
         .family = 6,
         .model = 28,
         .stepping = 2,
@@ -625,9 +612,7 @@  static x86_def_t builtin_x86_defs[] = {
     {
         .name = "Conroe",
         .level = 2,
-        .vendor1 = CPUID_VENDOR_INTEL_1,
-        .vendor2 = CPUID_VENDOR_INTEL_2,
-        .vendor3 = CPUID_VENDOR_INTEL_3,
+        .vendor = CPUID_VENDOR_INTEL,
         .family = 6,
         .model = 2,
         .stepping = 3,
@@ -645,9 +630,7 @@  static x86_def_t builtin_x86_defs[] = {
     {
         .name = "Penryn",
         .level = 2,
-        .vendor1 = CPUID_VENDOR_INTEL_1,
-        .vendor2 = CPUID_VENDOR_INTEL_2,
-        .vendor3 = CPUID_VENDOR_INTEL_3,
+        .vendor = CPUID_VENDOR_INTEL,
         .family = 6,
         .model = 2,
         .stepping = 3,
@@ -666,9 +649,7 @@  static x86_def_t builtin_x86_defs[] = {
     {
         .name = "Nehalem",
         .level = 2,
-        .vendor1 = CPUID_VENDOR_INTEL_1,
-        .vendor2 = CPUID_VENDOR_INTEL_2,
-        .vendor3 = CPUID_VENDOR_INTEL_3,
+        .vendor = CPUID_VENDOR_INTEL,
         .family = 6,
         .model = 2,
         .stepping = 3,
@@ -687,9 +668,7 @@  static x86_def_t builtin_x86_defs[] = {
     {
         .name = "Westmere",
         .level = 11,
-        .vendor1 = CPUID_VENDOR_INTEL_1,
-        .vendor2 = CPUID_VENDOR_INTEL_2,
-        .vendor3 = CPUID_VENDOR_INTEL_3,
+        .vendor = CPUID_VENDOR_INTEL,
         .family = 6,
         .model = 44,
         .stepping = 1,
@@ -709,9 +688,7 @@  static x86_def_t builtin_x86_defs[] = {
     {
         .name = "SandyBridge",
         .level = 0xd,
-        .vendor1 = CPUID_VENDOR_INTEL_1,
-        .vendor2 = CPUID_VENDOR_INTEL_2,
-        .vendor3 = CPUID_VENDOR_INTEL_3,
+        .vendor = CPUID_VENDOR_INTEL,
         .family = 6,
         .model = 42,
         .stepping = 1,
@@ -734,9 +711,7 @@  static x86_def_t builtin_x86_defs[] = {
     {
         .name = "Haswell",
         .level = 0xd,
-        .vendor1 = CPUID_VENDOR_INTEL_1,
-        .vendor2 = CPUID_VENDOR_INTEL_2,
-        .vendor3 = CPUID_VENDOR_INTEL_3,
+        .vendor = CPUID_VENDOR_INTEL,
         .family = 6,
         .model = 60,
         .stepping = 1,
@@ -764,9 +739,7 @@  static x86_def_t builtin_x86_defs[] = {
     {
         .name = "Opteron_G1",
         .level = 5,
-        .vendor1 = CPUID_VENDOR_AMD_1,
-        .vendor2 = CPUID_VENDOR_AMD_2,
-        .vendor3 = CPUID_VENDOR_AMD_3,
+        .vendor = CPUID_VENDOR_AMD,
         .family = 15,
         .model = 6,
         .stepping = 1,
@@ -788,9 +761,7 @@  static x86_def_t builtin_x86_defs[] = {
     {
         .name = "Opteron_G2",
         .level = 5,
-        .vendor1 = CPUID_VENDOR_AMD_1,
-        .vendor2 = CPUID_VENDOR_AMD_2,
-        .vendor3 = CPUID_VENDOR_AMD_3,
+        .vendor = CPUID_VENDOR_AMD,
         .family = 15,
         .model = 6,
         .stepping = 1,
@@ -814,9 +785,7 @@  static x86_def_t builtin_x86_defs[] = {
     {
         .name = "Opteron_G3",
         .level = 5,
-        .vendor1 = CPUID_VENDOR_AMD_1,
-        .vendor2 = CPUID_VENDOR_AMD_2,
-        .vendor3 = CPUID_VENDOR_AMD_3,
+        .vendor = CPUID_VENDOR_AMD,
         .family = 15,
         .model = 6,
         .stepping = 1,
@@ -842,9 +811,7 @@  static x86_def_t builtin_x86_defs[] = {
     {
         .name = "Opteron_G4",
         .level = 0xd,
-        .vendor1 = CPUID_VENDOR_AMD_1,
-        .vendor2 = CPUID_VENDOR_AMD_2,
-        .vendor3 = CPUID_VENDOR_AMD_3,
+        .vendor = CPUID_VENDOR_AMD,
         .family = 21,
         .model = 1,
         .stepping = 2,
@@ -874,9 +841,7 @@  static x86_def_t builtin_x86_defs[] = {
     {
         .name = "Opteron_G5",
         .level = 0xd,
-        .vendor1 = CPUID_VENDOR_AMD_1,
-        .vendor2 = CPUID_VENDOR_AMD_2,
-        .vendor3 = CPUID_VENDOR_AMD_3,
+        .vendor = CPUID_VENDOR_AMD,
         .family = 21,
         .model = 2,
         .stepping = 0,
@@ -937,9 +902,7 @@  static void kvm_cpu_fill_host(x86_def_t *x86_cpu_def)
 
     x86_cpu_def->name = "host";
     host_cpuid(0x0, 0, &eax, &ebx, &ecx, &edx);
-    x86_cpu_def->vendor1 = ebx;
-    x86_cpu_def->vendor2 = edx;
-    x86_cpu_def->vendor3 = ecx;
+    x86_cpu_vendor_words2str(x86_cpu_def->vendor, ebx, edx, ecx);
 
     host_cpuid(0x1, 0, &eax, &ebx, &ecx, &edx);
     x86_cpu_def->family = ((eax >> 8) & 0x0F) + ((eax >> 20) & 0xFF);
@@ -967,9 +930,7 @@  static void kvm_cpu_fill_host(x86_def_t *x86_cpu_def)
     x86_cpu_def->vendor_override = 0;
 
     /* Call Centaur's CPUID instruction. */
-    if (x86_cpu_def->vendor1 == CPUID_VENDOR_VIA_1 &&
-        x86_cpu_def->vendor2 == CPUID_VENDOR_VIA_2 &&
-        x86_cpu_def->vendor3 == CPUID_VENDOR_VIA_3) {
+    if (!strcmp(x86_cpu_def->vendor, CPUID_VENDOR_VIA)) {
         host_cpuid(0xC0000000, 0, &eax, &ebx, &ecx, &edx);
         eax = kvm_arch_get_supported_cpuid(s, 0xC0000000, 0, R_EAX);
         if (eax >= 0xC0000001) {
@@ -1205,15 +1166,10 @@  static char *x86_cpuid_get_vendor(Object *obj, Error **errp)
     X86CPU *cpu = X86_CPU(obj);
     CPUX86State *env = &cpu->env;
     char *value;
-    int i;
 
     value = (char *)g_malloc(CPUID_VENDOR_SZ + 1);
-    for (i = 0; i < 4; i++) {
-        value[i    ] = env->cpuid_vendor1 >> (8 * i);
-        value[i + 4] = env->cpuid_vendor2 >> (8 * i);
-        value[i + 8] = env->cpuid_vendor3 >> (8 * i);
-    }
-    value[CPUID_VENDOR_SZ] = '\0';
+    x86_cpu_vendor_words2str(value, env->cpuid_vendor1, env->cpuid_vendor2,
+                             env->cpuid_vendor3);
     return value;
 }
 
@@ -1337,7 +1293,6 @@  static int cpu_x86_find_by_name(x86_def_t *x86_cpu_def, const char *name)
  */
 static int cpu_x86_parse_featurestr(x86_def_t *x86_cpu_def, char *features)
 {
-    unsigned int i;
     char *featurestr; /* Single 'key=value" string being parsed */
     /* Features to be added */
     FeatureWordArray plus_features = { 0 };
@@ -1401,18 +1356,7 @@  static int cpu_x86_parse_featurestr(x86_def_t *x86_cpu_def, char *features)
                 }
                 x86_cpu_def->xlevel = numvalue;
             } else if (!strcmp(featurestr, "vendor")) {
-                if (strlen(val) != 12) {
-                    fprintf(stderr, "vendor string must be 12 chars long\n");
-                    goto error;
-                }
-                x86_cpu_def->vendor1 = 0;
-                x86_cpu_def->vendor2 = 0;
-                x86_cpu_def->vendor3 = 0;
-                for(i = 0; i < 4; i++) {
-                    x86_cpu_def->vendor1 |= ((uint8_t)val[i    ]) << (8 * i);
-                    x86_cpu_def->vendor2 |= ((uint8_t)val[i + 4]) << (8 * i);
-                    x86_cpu_def->vendor3 |= ((uint8_t)val[i + 8]) << (8 * i);
-                }
+                pstrcpy(x86_cpu_def->vendor, sizeof(x86_cpu_def->vendor), val);
                 x86_cpu_def->vendor_override = 1;
             } else if (!strcmp(featurestr, "model_id")) {
                 pstrcpy(x86_cpu_def->model_id, sizeof(x86_cpu_def->model_id),
@@ -1613,10 +1557,7 @@  int cpu_x86_register(X86CPU *cpu, const char *cpu_model)
         error_setg(&error, "Invalid cpu_model string format: %s", cpu_model);
         goto out;
     }
-    assert(def->vendor1);
-    env->cpuid_vendor1 = def->vendor1;
-    env->cpuid_vendor2 = def->vendor2;
-    env->cpuid_vendor3 = def->vendor3;
+    object_property_set_str(OBJECT(cpu), def->vendor, "vendor", &error);
     env->cpuid_vendor_override = def->vendor_override;
     object_property_set_int(OBJECT(cpu), def->level, "level", &error);
     object_property_set_int(OBJECT(cpu), def->family, "family", &error);
diff --git a/target-i386/cpu.h b/target-i386/cpu.h
index 27efe59..3833e6f 100644
--- a/target-i386/cpu.h
+++ b/target-i386/cpu.h
@@ -537,14 +537,14 @@  typedef uint32_t FeatureWordArray[FEATURE_WORDS];
 #define CPUID_VENDOR_INTEL_1 0x756e6547 /* "Genu" */
 #define CPUID_VENDOR_INTEL_2 0x49656e69 /* "ineI" */
 #define CPUID_VENDOR_INTEL_3 0x6c65746e /* "ntel" */
+#define CPUID_VENDOR_INTEL "GenuineIntel"
 
 #define CPUID_VENDOR_AMD_1   0x68747541 /* "Auth" */
 #define CPUID_VENDOR_AMD_2   0x69746e65 /* "enti" */
 #define CPUID_VENDOR_AMD_3   0x444d4163 /* "cAMD" */
+#define CPUID_VENDOR_AMD   "AuthenticAMD"
 
-#define CPUID_VENDOR_VIA_1   0x746e6543 /* "Cent" */
-#define CPUID_VENDOR_VIA_2   0x48727561 /* "aurH" */
-#define CPUID_VENDOR_VIA_3   0x736c7561 /* "auls" */
+#define CPUID_VENDOR_VIA   "CentaurHauls"
 
 #define CPUID_MWAIT_IBE     (1 << 1) /* Interrupts can exit capability */
 #define CPUID_MWAIT_EMX     (1 << 0) /* enumeration supported */