diff mbox

[v2,5/6] target-i386: Don't enable nested VMX by default

Message ID 1408999550-20321-6-git-send-email-ehabkost@redhat.com (mailing list archive)
State New, archived
Headers show

Commit Message

Eduardo Habkost Aug. 25, 2014, 8:45 p.m. UTC 
TCG doesn't support VMX, and nested VMX is not enabled by default on the
KVM kernel module.

So, there's no reason to have VMX enabled by default on the core2duo and
coreduo CPU models, today. Even the newer Intel CPU model definitions
don't have it enabled.

In this case, we need machine-type compat code, as people may be running
the older machine-types on hosts that had VMX nesting enabled.

Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
---
 hw/i386/pc_piix.c | 2 ++
 hw/i386/pc_q35.c  | 2 ++
 target-i386/cpu.c | 8 ++++----
 3 files changed, 8 insertions(+), 4 deletions(-)
diff mbox

Patch

diff --git a/hw/i386/pc_piix.c b/hw/i386/pc_piix.c
index 6ee8dfa..c6db762 100644
--- a/hw/i386/pc_piix.c
+++ b/hw/i386/pc_piix.c
@@ -304,6 +304,8 @@  static void pc_init_pci(MachineState *machine)
 
 static void pc_compat_2_1(MachineState *machine)
 {
+    x86_cpu_compat_set_features("coreduo", FEAT_1_ECX, CPUID_EXT_VMX, 0);
+    x86_cpu_compat_set_features("core2duo", FEAT_1_ECX, CPUID_EXT_VMX, 0);
 }
 
 static void pc_compat_2_0(MachineState *machine)
diff --git a/hw/i386/pc_q35.c b/hw/i386/pc_q35.c
index 55fc62f..be84352 100644
--- a/hw/i386/pc_q35.c
+++ b/hw/i386/pc_q35.c
@@ -278,6 +278,8 @@  static void pc_q35_init(MachineState *machine)
 
 static void pc_compat_2_1(MachineState *machine)
 {
+    x86_cpu_compat_set_features("coreduo", FEAT_1_ECX, CPUID_EXT_VMX, 0);
+    x86_cpu_compat_set_features("core2duo", FEAT_1_ECX, CPUID_EXT_VMX, 0);
 }
 
 static void pc_compat_2_0(MachineState *machine)
diff --git a/target-i386/cpu.c b/target-i386/cpu.c
index 6f26169..011316d 100644
--- a/target-i386/cpu.c
+++ b/target-i386/cpu.c
@@ -719,10 +719,10 @@  static X86CPUDefinition builtin_x86_defs[] = {
             CPUID_MTRR | CPUID_CLFLUSH | CPUID_MCA |
             CPUID_PSE36 | CPUID_VME | CPUID_ACPI | CPUID_SS,
         /* Missing: CPUID_EXT_DTES64, CPUID_EXT_DSCPL, CPUID_EXT_EST,
-         * CPUID_EXT_TM2, CPUID_EXT_XTPR, CPUID_EXT_PDCM */
+         * CPUID_EXT_TM2, CPUID_EXT_XTPR, CPUID_EXT_PDCM, CPUID_EXT_VMX */
         .features[FEAT_1_ECX] =
             CPUID_EXT_SSE3 | CPUID_EXT_MONITOR | CPUID_EXT_SSSE3 |
-            CPUID_EXT_VMX | CPUID_EXT_CX16,
+            CPUID_EXT_CX16,
         .features[FEAT_8000_0001_EDX] =
             CPUID_EXT2_LM | CPUID_EXT2_SYSCALL | CPUID_EXT2_NX,
         .features[FEAT_8000_0001_ECX] =
@@ -803,9 +803,9 @@  static X86CPUDefinition builtin_x86_defs[] = {
             CPUID_MTRR | CPUID_CLFLUSH | CPUID_MCA | CPUID_ACPI |
             CPUID_SS,
         /* Missing: CPUID_EXT_EST, CPUID_EXT_TM2 , CPUID_EXT_XTPR,
-         * CPUID_EXT_PDCM */
+         * CPUID_EXT_PDCM, CPUID_EXT_VMX */
         .features[FEAT_1_ECX] =
-            CPUID_EXT_SSE3 | CPUID_EXT_MONITOR | CPUID_EXT_VMX,
+            CPUID_EXT_SSE3 | CPUID_EXT_MONITOR,
         .features[FEAT_8000_0001_EDX] =
             CPUID_EXT2_NX,
         .xlevel = 0x80000008,