From 5037878e2223278aa627162aa0bf106dffac19d4 Mon Sep 17 00:00:00 2001 From: Gleb Natapov Date: Mon, 4 Feb 2013 16:00:28 +0200 Subject: [PATCH] KVM: VMX: cleanup vmx_set_cr0(). When calculating hw_cr0 teh current code masks bits that should be always on and re-adds them back immediately after. Cleanup the code by masking only those bits that should be dropped from hw_cr0. This allow us to get rid of some defines. Signed-off-by: Gleb Natapov Signed-off-by: Marcelo Tosatti --- arch/x86/kvm/vmx.c | 14 +++++--------- 1 file changed, 5 insertions(+), 9 deletions(-) diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c index fe9a9cf..fe09fdc 100644 --- a/arch/x86/kvm/vmx.c +++ b/arch/x86/kvm/vmx.c @@ -95,12 +95,8 @@ module_param(enable_apicv_reg_vid, bool, S_IRUGO); static bool __read_mostly nested = 0; module_param(nested, bool, S_IRUGO); -#define KVM_GUEST_CR0_MASK_UNRESTRICTED_GUEST \ - (X86_CR0_WP | X86_CR0_NE | X86_CR0_NW | X86_CR0_CD) -#define KVM_GUEST_CR0_MASK \ - (KVM_GUEST_CR0_MASK_UNRESTRICTED_GUEST | X86_CR0_PG | X86_CR0_PE) -#define KVM_VM_CR0_ALWAYS_ON_UNRESTRICTED_GUEST \ - (X86_CR0_WP | X86_CR0_NE) +#define KVM_GUEST_CR0_MASK (X86_CR0_NW | X86_CR0_CD) +#define KVM_VM_CR0_ALWAYS_ON_UNRESTRICTED_GUEST (X86_CR0_WP | X86_CR0_NE) #define KVM_VM_CR0_ALWAYS_ON \ (KVM_VM_CR0_ALWAYS_ON_UNRESTRICTED_GUEST | X86_CR0_PG | X86_CR0_PE) #define KVM_CR4_GUEST_OWNED_BITS \ @@ -3137,11 +3133,11 @@ static void vmx_set_cr0(struct kvm_vcpu *vcpu, unsigned long cr0) struct vcpu_vmx *vmx = to_vmx(vcpu); unsigned long hw_cr0; + hw_cr0 = (cr0 & ~KVM_GUEST_CR0_MASK); if (enable_unrestricted_guest) - hw_cr0 = (cr0 & ~KVM_GUEST_CR0_MASK_UNRESTRICTED_GUEST) - | KVM_VM_CR0_ALWAYS_ON_UNRESTRICTED_GUEST; + hw_cr0 |= KVM_VM_CR0_ALWAYS_ON_UNRESTRICTED_GUEST; else { - hw_cr0 = (cr0 & ~KVM_GUEST_CR0_MASK) | KVM_VM_CR0_ALWAYS_ON; + hw_cr0 |= KVM_VM_CR0_ALWAYS_ON; if (vmx->rmode.vm86_active && (cr0 & X86_CR0_PE)) enter_pmode(vcpu); -- 2.7.4