[Qemu-devel] [FOR 0.12][PATCH] cpuid: Update QEMU/TCG feature set

[Andre Przywara]

The CPUID features QEMU presented to the guest were not up-to-date
with QEMU's emulated feature set.
Add the missing bits of recent (and not so recent) additions to
QEMU's emulation engine.
For stability reasons only the user mode usable bits are exposed for
now, features like Monitor or CR8LEG are left out.

Signed-off-by: Andre Przywara <address@hidden>
---
 target-i386/helper.c |   25 ++++++++++++-------------
 1 files changed, 12 insertions(+), 13 deletions(-)

diff --git a/target-i386/helper.c b/target-i386/helper.c
index f0ecd50..f1ff577 100644
--- a/target-i386/helper.c
+++ b/target-i386/helper.c
@@ -139,10 +139,11 @@ static x86_def_t x86_defs[] = {
             CPUID_MTRR | CPUID_CLFLUSH | CPUID_MCA |
         /* this feature is needed for Solaris and isn't fully implemented */
             CPUID_PSE36,
-        .ext_features = CPUID_EXT_SSE3,
+        .ext_features = CPUID_EXT_SSE3 | CPUID_EXT_CX16 | CPUID_EXT_POPCNT,
         .ext2_features = (PPRO_FEATURES & 0x0183F3FF) | 
             CPUID_EXT2_LM | CPUID_EXT2_SYSCALL | CPUID_EXT2_NX,
-        .ext3_features = CPUID_EXT3_SVM,
+        .ext3_features = CPUID_EXT3_LAHF_LM | CPUID_EXT3_SVM |
+            CPUID_EXT3_ABM | CPUID_EXT3_SSE4A,
         .xlevel = 0x8000000A,
         .model_id = "QEMU Virtual CPU version " QEMU_VERSION,
     },
@@ -159,18 +160,19 @@ static x86_def_t x86_defs[] = {
         .features = PPRO_FEATURES | 
             CPUID_MTRR | CPUID_CLFLUSH | CPUID_MCA |
             CPUID_PSE36,
-        /* Missing: CPUID_EXT_CX16, CPUID_EXT_POPCNT */
-        .ext_features = CPUID_EXT_SSE3 | CPUID_EXT_MONITOR,
+        .ext_features = CPUID_EXT_SSE3 | CPUID_EXT_MONITOR | CPUID_EXT_CX16 |
+            CPUID_EXT_POPCNT,
         /* Missing: CPUID_EXT2_PDPE1GB, CPUID_EXT2_RDTSCP */
         .ext2_features = (PPRO_FEATURES & 0x0183F3FF) | 
             CPUID_EXT2_LM | CPUID_EXT2_SYSCALL | CPUID_EXT2_NX |
             CPUID_EXT2_3DNOW | CPUID_EXT2_3DNOWEXT | CPUID_EXT2_MMXEXT |
             CPUID_EXT2_FFXSR,
-        /* Missing: CPUID_EXT3_LAHF_LM, CPUID_EXT3_CMP_LEG, CPUID_EXT3_EXTAPIC,
-                    CPUID_EXT3_CR8LEG, CPUID_EXT3_ABM, CPUID_EXT3_SSE4A,
+        /* Missing: CPUID_EXT3_CMP_LEG, CPUID_EXT3_EXTAPIC,
+                    CPUID_EXT3_CR8LEG,
                     CPUID_EXT3_MISALIGNSSE, CPUID_EXT3_3DNOWPREFETCH,
                     CPUID_EXT3_OSVW, CPUID_EXT3_IBS */
-        .ext3_features = CPUID_EXT3_SVM,
+        .ext3_features = CPUID_EXT3_LAHF_LM | CPUID_EXT3_SVM |
+            CPUID_EXT3_ABM | CPUID_EXT3_SSE4A,
         .xlevel = 0x8000001A,
         .model_id = "AMD Phenom(tm) 9550 Quad-Core Processor"
     },
@@ -191,7 +193,7 @@ static x86_def_t x86_defs[] = {
                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 = CPUID_EXT2_LM | CPUID_EXT2_SYSCALL | CPUID_EXT2_NX,
-        /* Missing: .ext3_features = CPUID_EXT3_LAHF_LM */
+        .ext3_features = CPUID_EXT3_LAHF_LM,
         .xlevel = 0x80000008,
         .model_id = "Intel(R) Core(TM)2 Duo CPU     T7700  @ 2.40GHz",
     },
@@ -229,7 +231,7 @@ static x86_def_t x86_defs[] = {
         .model = 3,
         .stepping = 3,
         .features = PPRO_FEATURES,
-        .ext_features = CPUID_EXT_SSE3,
+        .ext_features = CPUID_EXT_SSE3 | CPUID_EXT_POPCNT,
         .xlevel = 0,
         .model_id = "QEMU Virtual CPU version " QEMU_VERSION,
     },
@@ -1791,11 +1793,8 @@ void cpu_x86_cpuid(CPUX86State *env, uint32_t index, 
uint32_t count,
         }
 
         if (kvm_enabled()) {
-            /* Nested SVM not yet supported in KVM */
+            /* Nested SVM not yet supported in upstream QEMU */
             *ecx &= ~CPUID_EXT3_SVM;
-        } else {
-            /* AMD 3DNow! is not supported in QEMU */
-            *edx &= ~(CPUID_EXT2_3DNOW | CPUID_EXT2_3DNOWEXT);
         }
         break;
     case 0x80000002:
-- 
1.6.4