[2/4] target/i386: Remove monitor from some CPU models
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Message ID 20191202062852.27948-3-tao3.xu@intel.com
State New
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Series
  • [1/4] target/i386: Add Denverton-v2 (no MPX) CPU model
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Commit Message

Tao Xu Dec. 2, 2019, 6:28 a.m. UTC
Add new version of Snowridge, Denverton, Opteron_G3, EPYC, and Dhyana
CPU model to remove MONITOR/MWAIT feature.

After QEMU/KVM use "-overcommit cpu-pm=on" to expose MONITOR/MWAIT
(commit id 6f131f13e68d648a8e4f083c667ab1acd88ce4cd), the MONITOR/MWAIT
feature in these CPU model is unused.

Signed-off-by: Tao Xu <tao3.xu@intel.com>
---
 target/i386/cpu.c | 38 ++++++++++++++++++++++++++++++++++++++
 1 file changed, 38 insertions(+)

Patch
diff mbox series

diff --git a/target/i386/cpu.c b/target/i386/cpu.c
index 06a3077f95..b09ac38409 100644
--- a/target/i386/cpu.c
+++ b/target/i386/cpu.c
@@ -3621,6 +3621,14 @@  static X86CPUDefinition builtin_x86_defs[] = {
                     { /* end of list */ },
                 },
             },
+            {
+                .version = 3,
+                .props = (PropValue[]) {
+                    /* mpx was already removed by -v2 above */
+                    { "monitor", "off" },
+                    { /* end of list */ },
+                },
+            },
             { /* end of list */ },
         },
     },
@@ -3732,6 +3740,17 @@  static X86CPUDefinition builtin_x86_defs[] = {
             CPUID_EXT3_ABM | CPUID_EXT3_SVM | CPUID_EXT3_LAHF_LM,
         .xlevel = 0x80000008,
         .model_id = "AMD Opteron 23xx (Gen 3 Class Opteron)",
+        .versions = (X86CPUVersionDefinition[]) {
+            { .version = 1 },
+            {
+                .version = 2,
+                .props = (PropValue[]) {
+                    { "monitor", "off" },
+                    { /* end of list */ },
+                },
+            },
+            { /* end of list */ },
+        },
     },
     {
         .name = "Opteron_G4",
@@ -3856,6 +3875,14 @@  static X86CPUDefinition builtin_x86_defs[] = {
                     { /* end of list */ }
                 }
             },
+            {
+                .version = 3,
+                .props = (PropValue[]) {
+                    /* ibpb was already enabled by -v2 above */
+                    { "monitor", "off" },
+                    { /* end of list */ },
+                },
+            },
             { /* end of list */ }
         }
     },
@@ -3908,6 +3935,17 @@  static X86CPUDefinition builtin_x86_defs[] = {
         .xlevel = 0x8000001E,
         .model_id = "Hygon Dhyana Processor",
         .cache_info = &epyc_cache_info,
+        .versions = (X86CPUVersionDefinition[]) {
+            { .version = 1 },
+            {
+                .version = 2,
+                .props = (PropValue[]) {
+                    { "monitor", "off" },
+                    { /* end of list */ },
+                },
+            },
+            { /* end of list */ },
+        },
     },
 };