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target-i386: unify reserved bits and NX bit check

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Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Paolo Bonzini 2014-05-27 13:58:46 +02:00
parent e7e898a76a
commit e2a32ebbfe
1 changed files with 4 additions and 12 deletions
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16
target-i386/helper.c
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@ -549,6 +549,10 @@ int x86_cpu_handle_mmu_fault(CPUState *cs, vaddr addr,
goto do_mapping;
}
if (!(env->efer & MSR_EFER_NXE)) {
rsvd_mask |= PG_NX_MASK;
}
if (env->cr[4] & CR4_PAE_MASK) {
uint64_t pde, pdpe;
target_ulong pdpe_addr;
@ -575,9 +579,6 @@ int x86_cpu_handle_mmu_fault(CPUState *cs, vaddr addr,
if (pml4e & (rsvd_mask | PG_PSE_MASK)) {
goto do_fault_rsvd;
}
if (!(env->efer & MSR_EFER_NXE) && (pml4e & PG_NX_MASK)) {
goto do_fault_rsvd;
}
if (!(pml4e & PG_ACCESSED_MASK)) {
pml4e |= PG_ACCESSED_MASK;
stl_phys_notdirty(cs->as, pml4e_addr, pml4e);
@ -592,9 +593,6 @@ int x86_cpu_handle_mmu_fault(CPUState *cs, vaddr addr,
if (pdpe & rsvd_mask) {
goto do_fault_rsvd;
}
if (!(env->efer & MSR_EFER_NXE) && (pdpe & PG_NX_MASK)) {
goto do_fault_rsvd;
}
ptep &= pdpe ^ PG_NX_MASK;
if (!(pdpe & PG_ACCESSED_MASK)) {
pdpe |= PG_ACCESSED_MASK;
@ -633,9 +631,6 @@ int x86_cpu_handle_mmu_fault(CPUState *cs, vaddr addr,
if (pde & rsvd_mask) {
goto do_fault_rsvd;
}
if (!(env->efer & MSR_EFER_NXE) && (pde & PG_NX_MASK)) {
goto do_fault_rsvd;
}
ptep &= pde ^ PG_NX_MASK;
if (pde & PG_PSE_MASK) {
/* 2 MB page */
@ -658,9 +653,6 @@ int x86_cpu_handle_mmu_fault(CPUState *cs, vaddr addr,
if (pte & rsvd_mask) {
goto do_fault_rsvd;
}
if (!(env->efer & MSR_EFER_NXE) && (pte & PG_NX_MASK)) {
goto do_fault_rsvd;
}
/* combine pde and pte nx, user and rw protections */
ptep &= pte ^ PG_NX_MASK;
page_size = 4096;