target/i386: add clflushopt to "Skylake-Server" cpu model

CPUID_7_0_EBX_CLFLUSHOPT is missed in current "Skylake-Server" cpu
model. Add it to "Skylake-Server" cpu model on pc-i440fx-2.12 and
pc-q35-2.12. Keep it disabled in "Skylake-Server" cpu model on older
machine types.

Signed-off-by: Haozhong Zhang <haozhong.zhang@intel.com>
Message-Id: <20171219033730.12748-3-haozhong.zhang@intel.com>
Reviewed-by: Eduardo Habkost <ehabkost@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>

diff --git a/include/hw/i386/pc.h b/include/hw/i386/pc.h
index 83d825e8966d3e49fbbf67dddebe52c9960a15db..bb49165fe0a432dbf81511b1da5f97c7f78736e5 100644 (file)
--- a/include/hw/i386/pc.h
+++ b/include/hw/i386/pc.h
@@ -323,6 +323,11 @@ bool e820_get_entry(int, uint32_t, uint64_t *, uint64_t *);
 
 #define PC_COMPAT_2_11 \
     HW_COMPAT_2_11 \
+    {\
+        .driver   = "Skylake-Server" "-" TYPE_X86_CPU,\
+        .property = "clflushopt",\
+        .value    = "off",\
+    },
 
 #define PC_COMPAT_2_10 \
     HW_COMPAT_2_10 \

diff --git a/target/i386/cpu.c b/target/i386/cpu.c
index ad8196b166501270f6f7152114bebde77407fe9a..4385853646e038033ff6a896503942a505f3f10c 100644 (file)
--- a/target/i386/cpu.c
+++ b/target/i386/cpu.c
@@ -1382,7 +1382,7 @@ static X86CPUDefinition builtin_x86_defs[] = {
             CPUID_7_0_EBX_SMAP | CPUID_7_0_EBX_MPX | CPUID_7_0_EBX_CLWB |
             CPUID_7_0_EBX_AVX512F | CPUID_7_0_EBX_AVX512DQ |
             CPUID_7_0_EBX_AVX512BW | CPUID_7_0_EBX_AVX512CD |
-            CPUID_7_0_EBX_AVX512VL,
+            CPUID_7_0_EBX_AVX512VL | CPUID_7_0_EBX_CLFLUSHOPT,
         /* Missing: XSAVES (not supported by some Linux versions,
          * including v4.1 to v4.12).
          * KVM doesn't yet expose any XSAVES state save component,