diff --git a/Makefile b/Makefile
index 9d583c4..876a5c9 100644
--- a/Makefile
+++ b/Makefile
@@ -281,6 +281,8 @@ endif
 install-sysconfig:
 	$(INSTALL_DIR) "$(DESTDIR)$(confdir)"
 	$(INSTALL_DATA) $(SRC_PATH)/sysconfigs/target/target-x86_64.conf "$(DESTDIR)$(confdir)"
+	$(INSTALL_DIR) "$(DESTDIR)$(datadir)"
+	$(INSTALL_DATA) "$(SRC_PATH)/sysconfigs/target/cpudefs-x86_64.conf" "$(DESTDIR)$(datadir)"
 
 install: all $(if $(BUILD_DOCS),install-doc) install-sysconfig
 	$(INSTALL_DIR) "$(DESTDIR)$(bindir)"
diff --git a/qemu-config-arch.c b/qemu-config-arch.c
index 832f0b0..95e9e77 100644
--- a/qemu-config-arch.c
+++ b/qemu-config-arch.c
@@ -51,6 +51,7 @@ static QemuOptsList qemu_readconfig_opts = {
 
 #define MAIN_CONFIG_NAME (CONFIG_QEMU_CONFDIR "/qemu.conf")
 #define ARCH_CONFIG_NAME (CONFIG_QEMU_CONFDIR "/target-" TARGET_ARCH ".conf")
+#define CPUDEFS_CONFIG_NAME (CONFIG_QEMU_DATADIR "/cpudefs-" TARGET_ARCH ".conf")
 
 /* List of default config files
  */
@@ -64,6 +65,10 @@ struct DefaultConfigFile {
 };
 
 static struct DefaultConfigFile arch_default_configs[] = {
+    /* not commonly edited config files with defaults, from /usr/share: */
+    /* CPU models: */
+    {"cpudefs", CPUDEFS_CONFIG_NAME},
+
     /* user-editable config files from /etc: */
     /* Main, generic config file: */
     {"main", MAIN_CONFIG_NAME},
diff --git a/sysconfigs/target/cpudefs-x86_64.conf b/sysconfigs/target/cpudefs-x86_64.conf
new file mode 100644
index 0000000..1aa498d
--- /dev/null
+++ b/sysconfigs/target/cpudefs-x86_64.conf
@@ -0,0 +1,127 @@
+# x86 CPU MODELS
+
+[cpudef]
+   name = "Conroe"
+   level = "2"
+   vendor = "GenuineIntel"
+   family = "6"
+   model = "2"
+   stepping = "3"
+   feature_edx = "sse2 sse fxsr mmx clflush pse36 pat cmov mca pge mtrr sep apic cx8 mce pae msr tsc pse de fpu"
+   feature_ecx = "ssse3 sse3"
+   extfeature_edx = "i64 xd syscall"
+   extfeature_ecx = "lahf_lm"
+   xlevel = "0x8000000A"
+   model_id = "Intel Celeron_4x0 (Conroe/Merom Class Core 2)"
+
+[cpudef]
+   name = "Penryn"
+   level = "2"
+   vendor = "GenuineIntel"
+   family = "6"
+   model = "2"
+   stepping = "3"
+   feature_edx = "sse2 sse fxsr mmx clflush pse36 pat cmov mca pge mtrr sep apic cx8 mce pae msr tsc pse de fpu"
+   feature_ecx = "sse4.1 cx16 ssse3 sse3"
+   extfeature_edx = "i64 xd syscall"
+   extfeature_ecx = "lahf_lm"
+   xlevel = "0x8000000A"
+   model_id = "Intel Core 2 Duo P9xxx (Penryn Class Core 2)"
+
+[cpudef]
+   name = "Nehalem"
+   level = "2"
+   vendor = "GenuineIntel"
+   family = "6"
+   model = "2"
+   stepping = "3"
+   feature_edx = "sse2 sse fxsr mmx clflush pse36 pat cmov mca pge mtrr sep apic cx8 mce pae msr tsc pse de fpu"
+   feature_ecx = "popcnt sse4.2 sse4.1 cx16 ssse3 sse3"
+   extfeature_edx = "i64 syscall xd"
+   extfeature_ecx = "lahf_lm"
+   xlevel = "0x8000000A"
+   model_id = "Intel Core i7 9xx (Nehalem Class Core i7)"
+
+[cpudef]
+   name = "Westmere"
+   level = "11"
+   vendor = "GenuineIntel"
+   family = "6"
+   model = "44"
+   stepping = "1"
+   feature_edx = "sse2 sse fxsr mmx clflush pse36 pat cmov mca pge mtrr sep apic cx8 mce pae msr tsc pse de fpu"
+   feature_ecx = "aes popcnt sse4.2 sse4.1 cx16 ssse3 sse3"
+   extfeature_edx = "i64 syscall xd"
+   extfeature_ecx = "lahf_lm"
+   xlevel = "0x8000000A"
+   model_id = "Westmere E56xx/L56xx/X56xx (Nehalem-C)"
+
+[cpudef]
+   name = "SandyBridge"
+   level = "0xd"
+   vendor = "GenuineIntel"
+   family = "6"
+   model = "42"
+   stepping = "1"
+   feature_edx = " sse2 sse fxsr mmx clflush pse36 pat cmov mca pge mtrr sep apic cx8 mce pae msr tsc pse de fpu"
+   feature_ecx = "avx xsave aes tsc-deadline popcnt x2apic sse4.2 sse4.1 cx16 ssse3 pclmulqdq sse3"
+   extfeature_edx = "i64 rdtscp nx syscall "
+   extfeature_ecx = "lahf_lm"
+   xlevel = "0x8000000A"
+   model_id = "Intel Xeon E312xx (Sandy Bridge)"
+
+[cpudef]
+   name = "Opteron_G1"
+   level = "5"
+   vendor = "AuthenticAMD"
+   family = "15"
+   model = "6"
+   stepping = "1"
+   feature_edx = "sse2 sse fxsr mmx clflush pse36 pat cmov mca pge mtrr sep apic cx8 mce pae msr tsc pse de fpu"
+   feature_ecx = "sse3"
+   extfeature_edx = "lm fxsr mmx nx pse36 pat cmov mca pge mtrr syscall apic cx8 mce pae msr tsc pse de fpu"
+   extfeature_ecx = " "
+   xlevel = "0x80000008"
+   model_id = "AMD Opteron 240 (Gen 1 Class Opteron)"
+
+[cpudef]
+   name = "Opteron_G2"
+   level = "5"
+   vendor = "AuthenticAMD"
+   family = "15"
+   model = "6"
+   stepping = "1"
+   feature_edx = "sse2 sse fxsr mmx clflush pse36 pat cmov mca pge mtrr sep apic cx8 mce pae msr tsc pse de fpu"
+   feature_ecx = "cx16 sse3"
+   extfeature_edx = "lm rdtscp fxsr mmx nx pse36 pat cmov mca pge mtrr syscall apic cx8 mce pae msr tsc pse de fpu"
+   extfeature_ecx = "svm lahf_lm"
+   xlevel = "0x80000008"
+   model_id = "AMD Opteron 22xx (Gen 2 Class Opteron)"
+
+[cpudef]
+   name = "Opteron_G3"
+   level = "5"
+   vendor = "AuthenticAMD"
+   family = "15"
+   model = "6"
+   stepping = "1"
+   feature_edx = "sse2 sse fxsr mmx clflush pse36 pat cmov mca pge mtrr sep apic cx8 mce pae msr tsc pse de fpu"
+   feature_ecx = "popcnt cx16 monitor sse3"
+   extfeature_edx = "lm rdtscp fxsr mmx nx pse36 pat cmov mca pge mtrr syscall apic cx8 mce pae msr tsc pse de fpu"
+   extfeature_ecx = "misalignsse sse4a abm svm lahf_lm"
+   xlevel = "0x80000008"
+   model_id = "AMD Opteron 23xx (Gen 3 Class Opteron)"
+
+[cpudef]
+   name = "Opteron_G4"
+   level = "0xd"
+   vendor = "AuthenticAMD"
+   family = "21"
+   model = "1"
+   stepping = "2"
+   feature_edx = "sse2 sse fxsr mmx clflush pse36 pat cmov mca pge mtrr sep apic cx8 mce pae msr tsc pse de fpu"
+   feature_ecx = "avx xsave aes popcnt sse4.2 sse4.1 cx16 ssse3 pclmulqdq sse3"
+   extfeature_edx = "lm rdtscp pdpe1gb fxsr mmx nx pse36 pat cmov mca pge mtrr syscall apic cx8 mce pae msr tsc pse de fpu"
+   extfeature_ecx = " fma4 xop 3dnowprefetch misalignsse sse4a abm svm lahf_lm"
+   xlevel = "0x8000001A"
+   model_id = "AMD Opteron 62xx class CPU"
diff --git a/sysconfigs/target/target-x86_64.conf b/sysconfigs/target/target-x86_64.conf
index cee0ea9..e69de29 100644
--- a/sysconfigs/target/target-x86_64.conf
+++ b/sysconfigs/target/target-x86_64.conf
@@ -1,128 +0,0 @@
-# x86 CPU MODELS
-
-[cpudef]
-   name = "Conroe"
-   level = "2"
-   vendor = "GenuineIntel"
-   family = "6"
-   model = "2"
-   stepping = "3"
-   feature_edx = "sse2 sse fxsr mmx clflush pse36 pat cmov mca pge mtrr sep apic cx8 mce pae msr tsc pse de fpu"
-   feature_ecx = "ssse3 sse3"
-   extfeature_edx = "i64 xd syscall"
-   extfeature_ecx = "lahf_lm"
-   xlevel = "0x8000000A"
-   model_id = "Intel Celeron_4x0 (Conroe/Merom Class Core 2)"
-
-[cpudef]
-   name = "Penryn"
-   level = "2"
-   vendor = "GenuineIntel"
-   family = "6"
-   model = "2"
-   stepping = "3"
-   feature_edx = "sse2 sse fxsr mmx clflush pse36 pat cmov mca pge mtrr sep apic cx8 mce pae msr tsc pse de fpu"
-   feature_ecx = "sse4.1 cx16 ssse3 sse3"
-   extfeature_edx = "i64 xd syscall"
-   extfeature_ecx = "lahf_lm"
-   xlevel = "0x8000000A"
-   model_id = "Intel Core 2 Duo P9xxx (Penryn Class Core 2)"
-
-[cpudef]
-   name = "Nehalem"
-   level = "2"
-   vendor = "GenuineIntel"
-   family = "6"
-   model = "2"
-   stepping = "3"
-   feature_edx = "sse2 sse fxsr mmx clflush pse36 pat cmov mca pge mtrr sep apic cx8 mce pae msr tsc pse de fpu"
-   feature_ecx = "popcnt sse4.2 sse4.1 cx16 ssse3 sse3"
-   extfeature_edx = "i64 syscall xd"
-   extfeature_ecx = "lahf_lm"
-   xlevel = "0x8000000A"
-   model_id = "Intel Core i7 9xx (Nehalem Class Core i7)"
-
-[cpudef]
-   name = "Westmere"
-   level = "11"
-   vendor = "GenuineIntel"
-   family = "6"
-   model = "44"
-   stepping = "1"
-   feature_edx = "sse2 sse fxsr mmx clflush pse36 pat cmov mca pge mtrr sep apic cx8 mce pae msr tsc pse de fpu"
-   feature_ecx = "aes popcnt sse4.2 sse4.1 cx16 ssse3 sse3"
-   extfeature_edx = "i64 syscall xd"
-   extfeature_ecx = "lahf_lm"
-   xlevel = "0x8000000A"
-   model_id = "Westmere E56xx/L56xx/X56xx (Nehalem-C)"
-
-[cpudef]
-   name = "SandyBridge"
-   level = "0xd"
-   vendor = "GenuineIntel"
-   family = "6"
-   model = "42"
-   stepping = "1"
-   feature_edx = " sse2 sse fxsr mmx clflush pse36 pat cmov mca pge mtrr sep apic cx8 mce pae msr tsc pse de fpu"
-   feature_ecx = "avx xsave aes tsc-deadline popcnt x2apic sse4.2 sse4.1 cx16 ssse3 pclmulqdq sse3"
-   extfeature_edx = "i64 rdtscp nx syscall "
-   extfeature_ecx = "lahf_lm"
-   xlevel = "0x8000000A"
-   model_id = "Intel Xeon E312xx (Sandy Bridge)"
-
-[cpudef]
-   name = "Opteron_G1"
-   level = "5"
-   vendor = "AuthenticAMD"
-   family = "15"
-   model = "6"
-   stepping = "1"
-   feature_edx = "sse2 sse fxsr mmx clflush pse36 pat cmov mca pge mtrr sep apic cx8 mce pae msr tsc pse de fpu"
-   feature_ecx = "sse3"
-   extfeature_edx = "lm fxsr mmx nx pse36 pat cmov mca pge mtrr syscall apic cx8 mce pae msr tsc pse de fpu"
-   extfeature_ecx = " "
-   xlevel = "0x80000008"
-   model_id = "AMD Opteron 240 (Gen 1 Class Opteron)"
-
-[cpudef]
-   name = "Opteron_G2"
-   level = "5"
-   vendor = "AuthenticAMD"
-   family = "15"
-   model = "6"
-   stepping = "1"
-   feature_edx = "sse2 sse fxsr mmx clflush pse36 pat cmov mca pge mtrr sep apic cx8 mce pae msr tsc pse de fpu"
-   feature_ecx = "cx16 sse3"
-   extfeature_edx = "lm rdtscp fxsr mmx nx pse36 pat cmov mca pge mtrr syscall apic cx8 mce pae msr tsc pse de fpu"
-   extfeature_ecx = "svm lahf_lm"
-   xlevel = "0x80000008"
-   model_id = "AMD Opteron 22xx (Gen 2 Class Opteron)"
-
-[cpudef]
-   name = "Opteron_G3"
-   level = "5"
-   vendor = "AuthenticAMD"
-   family = "15"
-   model = "6"
-   stepping = "1"
-   feature_edx = "sse2 sse fxsr mmx clflush pse36 pat cmov mca pge mtrr sep apic cx8 mce pae msr tsc pse de fpu"
-   feature_ecx = "popcnt cx16 monitor sse3"
-   extfeature_edx = "lm rdtscp fxsr mmx nx pse36 pat cmov mca pge mtrr syscall apic cx8 mce pae msr tsc pse de fpu"
-   extfeature_ecx = "misalignsse sse4a abm svm lahf_lm"
-   xlevel = "0x80000008"
-   model_id = "AMD Opteron 23xx (Gen 3 Class Opteron)"
-
-[cpudef]
-   name = "Opteron_G4"
-   level = "0xd"
-   vendor = "AuthenticAMD"
-   family = "21"
-   model = "1"
-   stepping = "2"
-   feature_edx = "sse2 sse fxsr mmx clflush pse36 pat cmov mca pge mtrr sep apic cx8 mce pae msr tsc pse de fpu"
-   feature_ecx = "avx xsave aes popcnt sse4.2 sse4.1 cx16 ssse3 pclmulqdq sse3"
-   extfeature_edx = "lm rdtscp pdpe1gb fxsr mmx nx pse36 pat cmov mca pge mtrr syscall apic cx8 mce pae msr tsc pse de fpu"
-   extfeature_ecx = " fma4 xop 3dnowprefetch misalignsse sse4a abm svm lahf_lm"
-   xlevel = "0x8000001A"
-   model_id = "AMD Opteron 62xx class CPU"
-
