diff options
| author | Avi Kivity | 2007-12-26 13:57:04 +0200 |
|---|---|---|
| committer | Avi Kivity | 2008-01-30 18:01:20 +0200 |
| commit | 774ead3ad9bcbc05ef6aaebb9bdf8b4c3126923b (patch) | |
| tree | 0395ee65292f99bd43ab2cd07beb554d99cb096f /arch/x86/kvm | |
| parent | b93463aa59d67b21b4921e30bd5c5dcc7c35ffbd (diff) | |
KVM: Disable vapic support on Intel machines with FlexPriority
FlexPriority accelerates the tpr without any patching.
Signed-off-by: Avi Kivity <avi@qumranet.com>
Diffstat (limited to 'arch/x86/kvm')
| -rw-r--r-- | arch/x86/kvm/svm.c | 6 | ||||
| -rw-r--r-- | arch/x86/kvm/vmx.c | 3 | ||||
| -rw-r--r-- | arch/x86/kvm/x86.c | 4 |
3 files changed, 11 insertions, 2 deletions
diff --git a/arch/x86/kvm/svm.c b/arch/x86/kvm/svm.c index 3d4b71a94440..33f77b044c52 100644 --- a/arch/x86/kvm/svm.c +++ b/arch/x86/kvm/svm.c @@ -1653,6 +1653,11 @@ static void svm_check_processor_compat(void *rtn) *(int *)rtn = 0; } +static bool svm_cpu_has_accelerated_tpr(void) +{ + return false; +} + static struct kvm_x86_ops svm_x86_ops = { .cpu_has_kvm_support = has_svm, .disabled_by_bios = is_disabled, @@ -1661,6 +1666,7 @@ static struct kvm_x86_ops svm_x86_ops = { .check_processor_compatibility = svm_check_processor_compat, .hardware_enable = svm_hardware_enable, .hardware_disable = svm_hardware_disable, + .cpu_has_accelerated_tpr = svm_cpu_has_accelerated_tpr, .vcpu_create = svm_create_vcpu, .vcpu_free = svm_free_vcpu, diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c index fc494aff5d8b..d1167fc303d6 100644 --- a/arch/x86/kvm/vmx.c +++ b/arch/x86/kvm/vmx.c @@ -192,7 +192,7 @@ static inline int cpu_has_secondary_exec_ctrls(void) CPU_BASED_ACTIVATE_SECONDARY_CONTROLS); } -static inline int cpu_has_vmx_virtualize_apic_accesses(void) +static inline bool cpu_has_vmx_virtualize_apic_accesses(void) { return (vmcs_config.cpu_based_2nd_exec_ctrl & SECONDARY_EXEC_VIRTUALIZE_APIC_ACCESSES); @@ -2565,6 +2565,7 @@ static struct kvm_x86_ops vmx_x86_ops = { .check_processor_compatibility = vmx_check_processor_compat, .hardware_enable = hardware_enable, .hardware_disable = hardware_disable, + .cpu_has_accelerated_tpr = cpu_has_vmx_virtualize_apic_accesses, .vcpu_create = vmx_create_vcpu, .vcpu_free = vmx_free_vcpu, diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c index e7eac27adb7f..1f48ec871035 100644 --- a/arch/x86/kvm/x86.c +++ b/arch/x86/kvm/x86.c @@ -684,9 +684,11 @@ int kvm_dev_ioctl_check_extension(long ext) case KVM_CAP_USER_MEMORY: case KVM_CAP_SET_TSS_ADDR: case KVM_CAP_EXT_CPUID: - case KVM_CAP_VAPIC: r = 1; break; + case KVM_CAP_VAPIC: + r = !kvm_x86_ops->cpu_has_accelerated_tpr(); + break; default: r = 0; break; |