KVM: VMX: Enable XSAVE/XRSTOR for guest

[GitHub/mt8127/android_kernel_alcatel_ttab.git] / arch / x86 / kvm / vmx.c

diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c
index 26ba61d6af8cca114b1089201ba0e4da96b08baa..864a1b6d155ad3831f7f5ebde3e686b2c45a4671 100644 (file)
--- a/arch/x86/kvm/vmx.c
+++ b/arch/x86/kvm/vmx.c
@@ -37,6 +37,8 @@
 #include <asm/vmx.h>
 #include <asm/virtext.h>
 #include <asm/mce.h>
+#include <asm/i387.h>
+#include <asm/xcr.h>
 
 #include "trace.h"
 
@@ -3390,6 +3392,16 @@ static int handle_wbinvd(struct kvm_vcpu *vcpu)
        return 1;
 }
 
+static int handle_xsetbv(struct kvm_vcpu *vcpu)
+{
+       u64 new_bv = kvm_read_edx_eax(vcpu);
+       u32 index = kvm_register_read(vcpu, VCPU_REGS_RCX);
+
+       if (kvm_set_xcr(vcpu, index, new_bv) == 0)
+               skip_emulated_instruction(vcpu);
+       return 1;
+}
+
 static int handle_apic_access(struct kvm_vcpu *vcpu)
 {
        return emulate_instruction(vcpu, 0, 0, 0) == EMULATE_DONE;
@@ -3668,6 +3680,7 @@ static int (*kvm_vmx_exit_handlers[])(struct kvm_vcpu *vcpu) = {
        [EXIT_REASON_TPR_BELOW_THRESHOLD]     = handle_tpr_below_threshold,
        [EXIT_REASON_APIC_ACCESS]             = handle_apic_access,
        [EXIT_REASON_WBINVD]                  = handle_wbinvd,
+       [EXIT_REASON_XSETBV]                  = handle_xsetbv,
        [EXIT_REASON_TASK_SWITCH]             = handle_task_switch,
        [EXIT_REASON_MCE_DURING_VMENTRY]      = handle_machine_check,
        [EXIT_REASON_EPT_VIOLATION]           = handle_ept_violation,