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KVM: VMX: Fold ept_update_paging_mode_cr4() into its caller 

ept_update_paging_mode_cr4() accesses vcpu->arch.cr4 directly, which usually
needs to be accessed via kvm_read_cr4().  In this case, we can't, since cr4
is in the process of being updated.  Instead of adding inane comments, fold
the function into its caller (vmx_set_cr4), so it can use the not-yet-committed
cr4 directly.

Signed-off-by: Avi Kivity <avi@redhat.com>
This commit is contained in:
Avi Kivity 2009-12-08 12:14:42 +02:00 committed by Marcelo Tosatti
parent ce03e4f21a
commit bc23008b61
1 changed files with 8 additions and 12 deletions
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20
arch/x86/kvm/vmx.c
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@ -1680,16 +1680,6 @@ static void ept_update_paging_mode_cr0(unsigned long *hw_cr0,
*hw_cr0 &= ~X86_CR0_WP;
}
static void ept_update_paging_mode_cr4(unsigned long *hw_cr4,
struct kvm_vcpu *vcpu)
{
if (!is_paging(vcpu)) {
*hw_cr4 &= ~X86_CR4_PAE;
*hw_cr4 |= X86_CR4_PSE;
} else if (!(vcpu->arch.cr4 & X86_CR4_PAE))
*hw_cr4 &= ~X86_CR4_PAE;
}
static void vmx_set_cr0(struct kvm_vcpu *vcpu, unsigned long cr0)
{
struct vcpu_vmx *vmx = to_vmx(vcpu);
@ -1767,8 +1757,14 @@ static void vmx_set_cr4(struct kvm_vcpu *vcpu, unsigned long cr4)
KVM_RMODE_VM_CR4_ALWAYS_ON : KVM_PMODE_VM_CR4_ALWAYS_ON);
vcpu->arch.cr4 = cr4;
if (enable_ept)
ept_update_paging_mode_cr4(&hw_cr4, vcpu);
if (enable_ept) {
if (!is_paging(vcpu)) {
hw_cr4 &= ~X86_CR4_PAE;
hw_cr4 |= X86_CR4_PSE;
} else if (!(cr4 & X86_CR4_PAE)) {
hw_cr4 &= ~X86_CR4_PAE;
}
}
vmcs_writel(CR4_READ_SHADOW, cr4);
vmcs_writel(GUEST_CR4, hw_cr4);