diff options
| author | Eduardo Habkost <ehabkost@redhat.com> | 2014-10-03 16:39:51 -0300 |
|---|---|---|
| committer | Andreas Färber <afaerber@suse.de> | 2014-11-04 15:49:05 +0100 |
| commit | 75d373ef9729bd22fbc46bfd8dcd158cbf6d9777 (patch) | |
| tree | e16f2535c672136c7d3006f7fa1fe5985dba5cb5 | |
| parent | e93abc147fa628650bdbe7fd57f27462ca40a3c2 (diff) | |
| download | qemu-75d373ef9729bd22fbc46bfd8dcd158cbf6d9777.tar.gz | |
target-i386: Disable SVM by default in KVM mode
Make SVM be disabled by default on all CPU models when in KVM mode.
Nested SVM is enabled by default in the KVM kernel module, but it is
probably less stable than nested VMX (which is already disabled by
default).
Add a new compat function, x86_cpu_compat_kvm_no_autodisable(), to keep
compatibility on previous machine-types.
Suggested-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
Signed-off-by: Andreas Färber <afaerber@suse.de>
| -rw-r--r-- | hw/i386/pc_piix.c | 1 | ||||
| -rw-r--r-- | hw/i386/pc_q35.c | 1 | ||||
| -rw-r--r-- | target-i386/cpu.c | 6 | ||||
| -rw-r--r-- | target-i386/cpu.h | 1 |
4 files changed, 9 insertions, 0 deletions
diff --git a/hw/i386/pc_piix.c b/hw/i386/pc_piix.c index 751f3e0265..93778cdc8f 100644 --- a/hw/i386/pc_piix.c +++ b/hw/i386/pc_piix.c @@ -306,6 +306,7 @@ 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); + x86_cpu_compat_kvm_no_autodisable(FEAT_8000_0001_ECX, CPUID_EXT3_SVM); } static void pc_compat_2_0(MachineState *machine) diff --git a/hw/i386/pc_q35.c b/hw/i386/pc_q35.c index c5ee250954..ec400e16df 100644 --- a/hw/i386/pc_q35.c +++ b/hw/i386/pc_q35.c @@ -285,6 +285,7 @@ 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); + x86_cpu_compat_kvm_no_autodisable(FEAT_8000_0001_ECX, CPUID_EXT3_SVM); } static void pc_compat_2_0(MachineState *machine) diff --git a/target-i386/cpu.c b/target-i386/cpu.c index b731832077..fa860de55c 100644 --- a/target-i386/cpu.c +++ b/target-i386/cpu.c @@ -461,6 +461,7 @@ static uint32_t kvm_default_features[FEATURE_WORDS] = { static uint32_t kvm_default_unset_features[FEATURE_WORDS] = { [FEAT_1_EDX] = CPUID_ACPI, [FEAT_1_ECX] = CPUID_EXT_MONITOR, + [FEAT_8000_0001_ECX] = CPUID_EXT3_SVM, }; void x86_cpu_compat_kvm_no_autoenable(FeatureWord w, uint32_t features) @@ -468,6 +469,11 @@ void x86_cpu_compat_kvm_no_autoenable(FeatureWord w, uint32_t features) kvm_default_features[w] &= ~features; } +void x86_cpu_compat_kvm_no_autodisable(FeatureWord w, uint32_t features) +{ + kvm_default_unset_features[w] &= ~features; +} + /* * Returns the set of feature flags that are supported and migratable by * QEMU, for a given FeatureWord. diff --git a/target-i386/cpu.h b/target-i386/cpu.h index a3fc6d86f9..1b2c12ad94 100644 --- a/target-i386/cpu.h +++ b/target-i386/cpu.h @@ -1366,6 +1366,7 @@ void x86_cpu_compat_set_features(const char *cpu_model, FeatureWord w, uint32_t feat_add, uint32_t feat_remove); void x86_cpu_compat_kvm_no_autoenable(FeatureWord w, uint32_t features); +void x86_cpu_compat_kvm_no_autodisable(FeatureWord w, uint32_t features); /* Return name of 32-bit register, from a R_* constant */ |