KVM: export the load_pdptrs() function to modules

[linux-2.6-omap-h63xx.git] / arch / x86 / kvm / x86.c

diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index 6b01552bd1f1cb91c64af4fdf9f3124e734d4d19..0c910c774a9bdbbff74fac4c7fd27ec200bc33df 100644 (file)
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -41,7 +41,15 @@
                          | X86_CR4_OSXMMEXCPT | X86_CR4_VMXE))
 
 #define CR8_RESERVED_BITS (~(unsigned long)X86_CR8_TPR)
-#define EFER_RESERVED_BITS 0xfffffffffffff2fe
+/* EFER defaults:
+ * - enable syscall per default because its emulated by KVM
+ * - enable LME and LMA per default on 64 bit KVM
+ */
+#ifdef CONFIG_X86_64
+static u64 __read_mostly efer_reserved_bits = 0xfffffffffffffafeULL;
+#else
+static u64 __read_mostly efer_reserved_bits = 0xfffffffffffffffeULL;
+#endif
 
 #define VM_STAT(x) offsetof(struct kvm, stat.x), KVM_STAT_VM
 #define VCPU_STAT(x) offsetof(struct kvm_vcpu, stat.x), KVM_STAT_VCPU
@@ -205,6 +213,7 @@ out:
 
        return ret;
 }
+EXPORT_SYMBOL_GPL(load_pdptrs);
 
 static bool pdptrs_changed(struct kvm_vcpu *vcpu)
 {
@@ -424,11 +433,9 @@ static u32 emulated_msrs[] = {
        MSR_IA32_MISC_ENABLE,
 };
 
-#ifdef CONFIG_X86_64
-
 static void set_efer(struct kvm_vcpu *vcpu, u64 efer)
 {
-       if (efer & EFER_RESERVED_BITS) {
+       if (efer & efer_reserved_bits) {
                printk(KERN_DEBUG "set_efer: 0x%llx #GP, reserved bits\n",
                       efer);
                kvm_inject_gp(vcpu, 0);
@@ -450,7 +457,12 @@ static void set_efer(struct kvm_vcpu *vcpu, u64 efer)
        vcpu->arch.shadow_efer = efer;
 }
 
-#endif
+void kvm_enable_efer_bits(u64 mask)
+{
+       efer_reserved_bits &= ~mask;
+}
+EXPORT_SYMBOL_GPL(kvm_enable_efer_bits);
+
 
 /*
  * Writes msr value into into the appropriate "register".
@@ -474,11 +486,9 @@ static int do_set_msr(struct kvm_vcpu *vcpu, unsigned index, u64 *data)
 int kvm_set_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 data)
 {
        switch (msr) {
-#ifdef CONFIG_X86_64
        case MSR_EFER:
                set_efer(vcpu, data);
                break;
-#endif
        case MSR_IA32_MC0_STATUS:
                pr_unimpl(vcpu, "%s: MSR_IA32_MC0_STATUS 0x%llx, nop\n",
                       __FUNCTION__, data);
@@ -556,11 +566,9 @@ int kvm_get_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 *pdata)
        case MSR_IA32_MISC_ENABLE:
                data = vcpu->arch.ia32_misc_enable_msr;
                break;
-#ifdef CONFIG_X86_64
        case MSR_EFER:
                data = vcpu->arch.shadow_efer;
                break;
-#endif
        default:
                pr_unimpl(vcpu, "unhandled rdmsr: 0x%x\n", msr);
                return 1;
@@ -2865,9 +2873,7 @@ int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu,
        set_cr8(vcpu, sregs->cr8);
 
        mmu_reset_needed |= vcpu->arch.shadow_efer != sregs->efer;
-#ifdef CONFIG_X86_64
        kvm_x86_ops->set_efer(vcpu, sregs->efer);
-#endif
        kvm_set_apic_base(vcpu, sregs->apic_base);
 
        kvm_x86_ops->decache_cr4_guest_bits(vcpu);