KVM: x86/mmu: Add a helper to calculate root from role_regs
Add a helper to calculate the level for non-EPT page tables from the MMU's role_regs. No functional change intended. Signed-off-by: Sean Christopherson <seanjc@google.com> Message-Id: <20210622175739.3610207-45-seanjc@google.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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Коммит
f4bd6f7376
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@ -238,6 +238,19 @@ static struct kvm_mmu_role_regs vcpu_to_role_regs(struct kvm_vcpu *vcpu)
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return regs;
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}
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static int role_regs_to_root_level(struct kvm_mmu_role_regs *regs)
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{
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if (!____is_cr0_pg(regs))
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return 0;
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else if (____is_efer_lma(regs))
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return ____is_cr4_la57(regs) ? PT64_ROOT_5LEVEL :
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PT64_ROOT_4LEVEL;
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else if (____is_cr4_pae(regs))
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return PT32E_ROOT_LEVEL;
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else
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return PT32_ROOT_LEVEL;
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}
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static inline bool kvm_available_flush_tlb_with_range(void)
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{
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return kvm_x86_ops.tlb_remote_flush_with_range;
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@ -3949,7 +3962,6 @@ static void nonpaging_init_context(struct kvm_mmu *context)
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context->gva_to_gpa = nonpaging_gva_to_gpa;
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context->sync_page = nonpaging_sync_page;
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context->invlpg = NULL;
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context->root_level = 0;
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context->direct_map = true;
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}
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@ -4519,11 +4531,8 @@ static void reset_guest_paging_metadata(struct kvm_vcpu *vcpu,
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update_last_nonleaf_level(mmu);
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}
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static void paging64_init_context_common(struct kvm_mmu *context,
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int root_level)
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static void paging64_init_context_common(struct kvm_mmu *context)
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{
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context->root_level = root_level;
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WARN_ON_ONCE(!is_cr4_pae(context));
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context->page_fault = paging64_page_fault;
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context->gva_to_gpa = paging64_gva_to_gpa;
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@ -4532,18 +4541,13 @@ static void paging64_init_context_common(struct kvm_mmu *context,
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context->direct_map = false;
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}
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static void paging64_init_context(struct kvm_mmu *context,
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struct kvm_mmu_role_regs *regs)
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static void paging64_init_context(struct kvm_mmu *context)
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{
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int root_level = ____is_cr4_la57(regs) ? PT64_ROOT_5LEVEL :
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PT64_ROOT_4LEVEL;
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paging64_init_context_common(context, root_level);
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paging64_init_context_common(context);
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}
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static void paging32_init_context(struct kvm_mmu *context)
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{
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context->root_level = PT32_ROOT_LEVEL;
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context->page_fault = paging32_page_fault;
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context->gva_to_gpa = paging32_gva_to_gpa;
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context->sync_page = paging32_sync_page;
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@ -4553,7 +4557,7 @@ static void paging32_init_context(struct kvm_mmu *context)
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static void paging32E_init_context(struct kvm_mmu *context)
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{
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paging64_init_context_common(context, PT32E_ROOT_LEVEL);
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paging64_init_context_common(context);
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}
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static union kvm_mmu_extended_role kvm_calc_mmu_role_ext(struct kvm_vcpu *vcpu,
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@ -4642,21 +4646,16 @@ static void init_kvm_tdp_mmu(struct kvm_vcpu *vcpu)
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context->get_guest_pgd = get_cr3;
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context->get_pdptr = kvm_pdptr_read;
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context->inject_page_fault = kvm_inject_page_fault;
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context->root_level = role_regs_to_root_level(®s);
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if (!is_paging(vcpu)) {
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if (!is_paging(vcpu))
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context->gva_to_gpa = nonpaging_gva_to_gpa;
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context->root_level = 0;
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} else if (is_long_mode(vcpu)) {
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context->root_level = ____is_cr4_la57(®s) ?
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PT64_ROOT_5LEVEL : PT64_ROOT_4LEVEL;
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else if (is_long_mode(vcpu))
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context->gva_to_gpa = paging64_gva_to_gpa;
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} else if (is_pae(vcpu)) {
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context->root_level = PT32E_ROOT_LEVEL;
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else if (is_pae(vcpu))
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context->gva_to_gpa = paging64_gva_to_gpa;
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} else {
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context->root_level = PT32_ROOT_LEVEL;
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else
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context->gva_to_gpa = paging32_gva_to_gpa;
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}
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reset_guest_paging_metadata(vcpu, context);
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reset_tdp_shadow_zero_bits_mask(vcpu, context);
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@ -4706,11 +4705,12 @@ static void shadow_mmu_init_context(struct kvm_vcpu *vcpu, struct kvm_mmu *conte
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if (!____is_cr0_pg(regs))
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nonpaging_init_context(context);
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else if (____is_efer_lma(regs))
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paging64_init_context(context, regs);
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paging64_init_context(context);
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else if (____is_cr4_pae(regs))
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paging32E_init_context(context);
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else
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paging32_init_context(context);
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context->root_level = role_regs_to_root_level(regs);
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reset_guest_paging_metadata(vcpu, context);
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context->shadow_root_level = new_role.base.level;
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@ -4849,17 +4849,7 @@ kvm_calc_nested_mmu_role(struct kvm_vcpu *vcpu, struct kvm_mmu_role_regs *regs)
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* to "true" to try to detect bogus usage of the nested MMU.
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*/
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role.base.direct = true;
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if (!____is_cr0_pg(regs))
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role.base.level = 0;
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else if (____is_efer_lma(regs))
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role.base.level = ____is_cr4_la57(regs) ? PT64_ROOT_5LEVEL :
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PT64_ROOT_4LEVEL;
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else if (____is_cr4_pae(regs))
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role.base.level = PT32E_ROOT_LEVEL;
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else
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role.base.level = PT32_ROOT_LEVEL;
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role.base.level = role_regs_to_root_level(regs);
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return role;
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}
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