[Qemu-devel] [PATCH] Clean up x86 CPUID definitions

[Alexander Graf <agraf@suse.de>]

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My core2duo patch introduced a vague statement of "missing features" in 
the CPUID specification. This patch addresses this by specifying exactly 
what is missing.
While going along the missing CPUID entries I also stumbled across 
invalid and missing CPUID #defines while comparing them to the Intel 
Documentation. This patch also addresses these. I found them too minor 
to split them up in a separate patch.

Furthermore I looked through CPUID functions > 5 and realized that it 
should be safe to bump the level to 10. I tried booting Linux with that 
and it worked fine.


Signed-off-by: Alexander Graf <agraf@suse.de>



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Index: target-i386/helper.c
===================================================================
--- target-i386/helper.c	(revision 5349)
+++ target-i386/helper.c	(working copy)
@@ -167,19 +167,22 @@
     },
     {
         .name = "core2duo",
-        /* original is on level 10 */
-        .level = 5,
+        .level = 10,
         .family = 6,
         .model = 15,
         .stepping = 11,
-        /* the original CPU does have many more features that are
-         * not implemented yet */
+	/* The original CPU also implements these features:
+               CPUID_VME, CPUID_DTS, CPUID_ACPI, CPUID_SS, CPUID_HT,
+               CPUID_TM, CPUID_PBE */
         .features = PPRO_FEATURES |
             CPUID_MTRR | CPUID_CLFLUSH | CPUID_MCA |
             CPUID_PSE36,
+	/* The original CPU also implements these ext features:
+               CPUID_EXT_DTES64, CPUID_EXT_DSCPL, CPUID_EXT_VMX, CPUID_EXT_EST,
+               CPUID_EXT_TM2, CPUID_EXT_CX16, CPUID_EXT_XTPR, CPUID_EXT_PDCM */
         .ext_features = CPUID_EXT_SSE3 | CPUID_EXT_MONITOR | CPUID_EXT_SSSE3,
-        .ext2_features = (PPRO_FEATURES & 0x0183F3FF) |
-            CPUID_EXT2_LM | CPUID_EXT2_SYSCALL | CPUID_EXT2_NX,
+        .ext2_features = CPUID_EXT2_LM | CPUID_EXT2_SYSCALL | CPUID_EXT2_NX,
+        /* Missing: .ext3_features = CPUID_EXT3_LAHF_LM */
         .xlevel = 0x8000000A,
         .model_id = "Intel(R) Core(TM)2 Duo CPU     T7700  @ 2.40GHz",
     },
@@ -240,7 +243,7 @@
         .family = 6,
         .model = 2,
         .stepping = 3,
-        .features = PPRO_FEATURES | PPRO_FEATURES | CPUID_PSE36 | CPUID_VME | CPUID_MTRR | CPUID_MCA,
+        .features = PPRO_FEATURES | CPUID_PSE36 | CPUID_VME | CPUID_MTRR | CPUID_MCA,
         .ext2_features = (PPRO_FEATURES & 0x0183F3FF) | CPUID_EXT2_MMXEXT | CPUID_EXT2_3DNOW | CPUID_EXT2_3DNOWEXT,
         .xlevel = 0x80000008,
         /* XXX: put another string ? */
Index: target-i386/cpu.h
===================================================================
--- target-i386/cpu.h	(revision 5349)
+++ target-i386/cpu.h	(working copy)
@@ -298,6 +298,7 @@
 #define CPUID_PBE (1 << 31)
 
 #define CPUID_EXT_SSE3     (1 << 0)
+#define CPUID_EXT_DTES64   (1 << 2)
 #define CPUID_EXT_MONITOR  (1 << 3)
 #define CPUID_EXT_DSCPL    (1 << 4)
 #define CPUID_EXT_VMX      (1 << 5)
@@ -308,8 +309,15 @@
 #define CPUID_EXT_CID      (1 << 10)
 #define CPUID_EXT_CX16     (1 << 13)
 #define CPUID_EXT_XTPR     (1 << 14)
-#define CPUID_EXT_DCA      (1 << 17)
-#define CPUID_EXT_POPCNT   (1 << 22)
+#define CPUID_EXT_PDCM     (1 << 15)
+#define CPUID_EXT_DCA      (1 << 18)
+#define CPUID_EXT_SSE41    (1 << 19)
+#define CPUID_EXT_SSE42    (1 << 20)
+#define CPUID_EXT_X2APIC   (1 << 21)
+#define CPUID_EXT_MOVBE    (1 << 22)
+#define CPUID_EXT_POPCNT   (1 << 23)
+#define CPUID_EXT_XSAVE    (1 << 26)
+#define CPUID_EXT_OSXSAVE  (1 << 27)
 
 #define CPUID_EXT2_SYSCALL (1 << 11)
 #define CPUID_EXT2_MP      (1 << 19)
Index: target-i386/op_helper.c
===================================================================
--- target-i386/op_helper.c	(revision 5349)
+++ target-i386/op_helper.c	(working copy)
@@ -1956,6 +1956,27 @@
         ECX = CPUID_MWAIT_EMX | CPUID_MWAIT_IBE;
         EDX = 0;
         break;
+    case 6:
+        /* Thermal and Power Leaf */
+        EAX = 0;
+        EBX = 0;
+        ECX = 0;
+        EDX = 0;
+        break;
+    case 9:
+        /* Direct Cache Access Information Leaf */
+        EAX = 0; /* Bits 0-31 in DCA_CAP MSR */
+        EBX = 0;
+        ECX = 0;
+        EDX = 0;
+        break;
+    case 0xA:
+        /* Architectural Performance Monitoring Leaf */
+        EAX = 0;
+        EBX = 0;
+        ECX = 0;
+        EDX = 0;
+        break;
     case 0x80000000:
         EAX = env->cpuid_xlevel;
         EBX = env->cpuid_vendor1;