39 lines
1.6 KiB
Diff
39 lines
1.6 KiB
Diff
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# Commit 0c006b41a283a0a569c863d44abde5aa5750ae01
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# Date 2013-08-13 17:47:16 +0200
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# Author Yang Zhang <yang.z.zhang@Intel.com>
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# Committer Jan Beulich <jbeulich@suse.com>
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VMX: add boot parameter to enable/disable APIC-v dynamically
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Add a boot parameter to enable/disable the APIC-v dynamically. APIC-v is
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enabled by default. User can use apicv=0 to disable it.
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Signed-off-by: Yang Zhang <yang.z.zhang@Intel.com>
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--- a/xen/arch/x86/hvm/vmx/vmcs.c
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+++ b/xen/arch/x86/hvm/vmx/vmcs.c
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@@ -46,6 +46,9 @@ boolean_param("vpid", opt_vpid_enabled);
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static bool_t __read_mostly opt_unrestricted_guest_enabled = 1;
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boolean_param("unrestricted_guest", opt_unrestricted_guest_enabled);
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+static bool_t __read_mostly opt_apicv_enabled = 1;
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+boolean_param("apicv", opt_apicv_enabled);
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+
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/*
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* These two parameters are used to config the controls for Pause-Loop Exiting:
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* ple_gap: upper bound on the amount of time between two successive
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@@ -196,12 +199,12 @@ static int vmx_init_vmcs_config(void)
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* "APIC Register Virtualization" and "Virtual Interrupt Delivery"
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* can be set only when "use TPR shadow" is set
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*/
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- if ( _vmx_cpu_based_exec_control & CPU_BASED_TPR_SHADOW )
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+ if ( (_vmx_cpu_based_exec_control & CPU_BASED_TPR_SHADOW) &&
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+ opt_apicv_enabled )
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opt |= SECONDARY_EXEC_APIC_REGISTER_VIRT |
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SECONDARY_EXEC_VIRTUAL_INTR_DELIVERY |
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SECONDARY_EXEC_VIRTUALIZE_X2APIC_MODE;
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-
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_vmx_secondary_exec_control = adjust_vmx_controls(
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"Secondary Exec Control", min, opt,
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MSR_IA32_VMX_PROCBASED_CTLS2, &mismatch);
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