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| author | Yang Zhang <yang.z.zhang@Intel.com> | 2013-08-13 17:47:16 +0200 |
|---|---|---|
| committer | Jan Beulich <jbeulich@suse.com> | 2013-08-13 17:47:16 +0200 |
| commit | 0c006b41a283a0a569c863d44abde5aa5750ae01 (patch) | |
| tree | d4d1c72acedf27058d57466524dcdb04e3199ac9 /xen | |
| parent | 7b9fa702ca323164d6b49e8b639a57f880454a8c (diff) | |
| download | xen-0c006b41a283a0a569c863d44abde5aa5750ae01.tar.gz xen-0c006b41a283a0a569c863d44abde5aa5750ae01.tar.bz2 xen-0c006b41a283a0a569c863d44abde5aa5750ae01.zip | |
VMX: add boot parameter to enable/disable APIC-v dynamically
Add a boot parameter to enable/disable the APIC-v dynamically. APIC-v is
enabled by default. User can use apicv=0 to disable it.
Signed-off-by: Yang Zhang <yang.z.zhang@Intel.com>
Diffstat (limited to 'xen')
| -rw-r--r-- | xen/arch/x86/hvm/vmx/vmcs.c | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/xen/arch/x86/hvm/vmx/vmcs.c b/xen/arch/x86/hvm/vmx/vmcs.c index de9f592892..79efb3f639 100644 --- a/xen/arch/x86/hvm/vmx/vmcs.c +++ b/xen/arch/x86/hvm/vmx/vmcs.c @@ -46,6 +46,9 @@ boolean_param("vpid", opt_vpid_enabled); static bool_t __read_mostly opt_unrestricted_guest_enabled = 1; boolean_param("unrestricted_guest", opt_unrestricted_guest_enabled); +static bool_t __read_mostly opt_apicv_enabled = 1; +boolean_param("apicv", opt_apicv_enabled); + /* * These two parameters are used to config the controls for Pause-Loop Exiting: * ple_gap: upper bound on the amount of time between two successive @@ -196,12 +199,12 @@ static int vmx_init_vmcs_config(void) * "APIC Register Virtualization" and "Virtual Interrupt Delivery" * can be set only when "use TPR shadow" is set */ - if ( _vmx_cpu_based_exec_control & CPU_BASED_TPR_SHADOW ) + if ( (_vmx_cpu_based_exec_control & CPU_BASED_TPR_SHADOW) && + opt_apicv_enabled ) opt |= SECONDARY_EXEC_APIC_REGISTER_VIRT | SECONDARY_EXEC_VIRTUAL_INTR_DELIVERY | SECONDARY_EXEC_VIRTUALIZE_X2APIC_MODE; - _vmx_secondary_exec_control = adjust_vmx_controls( "Secondary Exec Control", min, opt, MSR_IA32_VMX_PROCBASED_CTLS2, &mismatch); |