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KVM: Rename variable smep to cr4_smep

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Rename variable smep to cr4_smep, which can better reflect the
meaning of the variable.

Signed-off-by: Feng Wu <feng.wu@intel.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
This commit is contained in:
Feng Wu 2014-04-01 17:56:48 +08:00 committed by Marcelo Tosatti
parent de935ae15b
commit 66386ade2a
1 changed files with 3 additions and 3 deletions
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6
arch/x86/kvm/mmu.c
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@ -3606,9 +3606,9 @@ void update_permission_bitmask(struct kvm_vcpu *vcpu,
{
unsigned bit, byte, pfec;
u8 map;
bool fault, x, w, u, wf, uf, ff, smapf, cr4_smap, smep, smap = 0;
bool fault, x, w, u, wf, uf, ff, smapf, cr4_smap, cr4_smep, smap = 0;
smep = kvm_read_cr4_bits(vcpu, X86_CR4_SMEP);
cr4_smep = kvm_read_cr4_bits(vcpu, X86_CR4_SMEP);
cr4_smap = kvm_read_cr4_bits(vcpu, X86_CR4_SMAP);
for (byte = 0; byte < ARRAY_SIZE(mmu->permissions); ++byte) {
pfec = byte << 1;
@ -3633,7 +3633,7 @@ void update_permission_bitmask(struct kvm_vcpu *vcpu,
/* Allow supervisor writes if !cr0.wp */
w |= !is_write_protection(vcpu) && !uf;
/* Disallow supervisor fetches of user code if cr4.smep */
x &= !(smep && u && !uf);
x &= !(cr4_smep && u && !uf);
/*
* SMAP:kernel-mode data accesses from user-mode