KVM: x86/mmu: replace direct_map with root_role.direct

direct_map is always equal to the direct field of the root page's role:

- for shadow paging, direct_map is true if CR0.PG=0 and root_role.direct is
copied from cpu_role.base.direct

- for TDP, it is always true and root_role.direct is also always true

- for shadow TDP, it is always false and root_role.direct is also always
false

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

diff --git a/arch/x86/include/asm/kvm_host.h b/arch/x86/include/asm/kvm_host.h
index aea39fe..752a6d2 100644 (file)
--- a/arch/x86/include/asm/kvm_host.h
+++ b/arch/x86/include/asm/kvm_host.h
@@ -438,7 +438,6 @@ struct kvm_mmu {
        struct kvm_mmu_root_info root;
        union kvm_cpu_role cpu_role;
        union kvm_mmu_page_role root_role;
-       bool direct_map;
 
        /*
        * The pkru_mask indicates if protection key checks are needed.  It

diff --git a/arch/x86/kvm/mmu/mmu.c b/arch/x86/kvm/mmu/mmu.c
index 9752f71..085e9b8 100644 (file)
--- a/arch/x86/kvm/mmu/mmu.c
+++ b/arch/x86/kvm/mmu/mmu.c
@@ -2028,7 +2028,7 @@ static struct kvm_mmu_page *kvm_mmu_get_page(struct kvm_vcpu *vcpu,
                                             int direct,
                                             unsigned int access)
 {
-       bool direct_mmu = vcpu->arch.mmu->direct_map;
+       bool direct_mmu = vcpu->arch.mmu->root_role.direct;
        union kvm_mmu_page_role role;
        struct hlist_head *sp_list;
        unsigned quadrant;
@@ -2133,7 +2133,7 @@ static void shadow_walk_init_using_root(struct kvm_shadow_walk_iterator *iterato
 
        if (iterator->level >= PT64_ROOT_4LEVEL &&
            vcpu->arch.mmu->cpu_role.base.level < PT64_ROOT_4LEVEL &&
-           !vcpu->arch.mmu->direct_map)
+           !vcpu->arch.mmu->root_role.direct)
                iterator->level = PT32E_ROOT_LEVEL;
 
        if (iterator->level == PT32E_ROOT_LEVEL) {
@@ -2515,7 +2515,7 @@ static int kvm_mmu_unprotect_page_virt(struct kvm_vcpu *vcpu, gva_t gva)
        gpa_t gpa;
        int r;
 
-       if (vcpu->arch.mmu->direct_map)
+       if (vcpu->arch.mmu->root_role.direct)
                return 0;
 
        gpa = kvm_mmu_gva_to_gpa_read(vcpu, gva, NULL);
@@ -3596,7 +3596,8 @@ static int mmu_alloc_special_roots(struct kvm_vcpu *vcpu)
         * equivalent level in the guest's NPT to shadow.  Allocate the tables
         * on demand, as running a 32-bit L1 VMM on 64-bit KVM is very rare.
         */
-       if (mmu->direct_map || mmu->cpu_role.base.level >= PT64_ROOT_4LEVEL ||
+       if (mmu->root_role.direct ||
+           mmu->cpu_role.base.level >= PT64_ROOT_4LEVEL ||
            mmu->root_role.level < PT64_ROOT_4LEVEL)
                return 0;
 
@@ -3693,7 +3694,7 @@ void kvm_mmu_sync_roots(struct kvm_vcpu *vcpu)
        int i;
        struct kvm_mmu_page *sp;
 
-       if (vcpu->arch.mmu->direct_map)
+       if (vcpu->arch.mmu->root_role.direct)
                return;
 
        if (!VALID_PAGE(vcpu->arch.mmu->root.hpa))
@@ -3923,7 +3924,7 @@ static bool kvm_arch_setup_async_pf(struct kvm_vcpu *vcpu, gpa_t cr2_or_gpa,
 
        arch.token = alloc_apf_token(vcpu);
        arch.gfn = gfn;
-       arch.direct_map = vcpu->arch.mmu->direct_map;
+       arch.direct_map = vcpu->arch.mmu->root_role.direct;
        arch.cr3 = vcpu->arch.mmu->get_guest_pgd(vcpu);
 
        return kvm_setup_async_pf(vcpu, cr2_or_gpa,
@@ -4141,7 +4142,6 @@ static void nonpaging_init_context(struct kvm_mmu *context)
        context->gva_to_gpa = nonpaging_gva_to_gpa;
        context->sync_page = nonpaging_sync_page;
        context->invlpg = NULL;
-       context->direct_map = true;
 }
 
 static inline bool is_root_usable(struct kvm_mmu_root_info *root, gpa_t pgd,
@@ -4723,7 +4723,6 @@ static void paging64_init_context(struct kvm_mmu *context)
        context->gva_to_gpa = paging64_gva_to_gpa;
        context->sync_page = paging64_sync_page;
        context->invlpg = paging64_invlpg;
-       context->direct_map = false;
 }
 
 static void paging32_init_context(struct kvm_mmu *context)
@@ -4732,7 +4731,6 @@ static void paging32_init_context(struct kvm_mmu *context)
        context->gva_to_gpa = paging32_gva_to_gpa;
        context->sync_page = paging32_sync_page;
        context->invlpg = paging32_invlpg;
-       context->direct_map = false;
 }
 
 static union kvm_cpu_role
@@ -4822,7 +4820,6 @@ static void init_kvm_tdp_mmu(struct kvm_vcpu *vcpu,
        context->page_fault = kvm_tdp_page_fault;
        context->sync_page = nonpaging_sync_page;
        context->invlpg = NULL;
-       context->direct_map = true;
        context->get_guest_pgd = get_cr3;
        context->get_pdptr = kvm_pdptr_read;
        context->inject_page_fault = kvm_inject_page_fault;
@@ -4952,7 +4949,7 @@ void kvm_init_shadow_ept_mmu(struct kvm_vcpu *vcpu, bool execonly,
                context->gva_to_gpa = ept_gva_to_gpa;
                context->sync_page = ept_sync_page;
                context->invlpg = ept_invlpg;
-               context->direct_map = false;
+
                update_permission_bitmask(context, true);
                context->pkru_mask = 0;
                reset_rsvds_bits_mask_ept(vcpu, context, execonly, huge_page_level);
@@ -5068,13 +5065,13 @@ int kvm_mmu_load(struct kvm_vcpu *vcpu)
 {
        int r;
 
-       r = mmu_topup_memory_caches(vcpu, !vcpu->arch.mmu->direct_map);
+       r = mmu_topup_memory_caches(vcpu, !vcpu->arch.mmu->root_role.direct);
        if (r)
                goto out;
        r = mmu_alloc_special_roots(vcpu);
        if (r)
                goto out;
-       if (vcpu->arch.mmu->direct_map)
+       if (vcpu->arch.mmu->root_role.direct)
                r = mmu_alloc_direct_roots(vcpu);
        else
                r = mmu_alloc_shadow_roots(vcpu);
@@ -5331,7 +5328,7 @@ int kvm_mmu_page_fault(struct kvm_vcpu *vcpu, gpa_t cr2_or_gpa, u64 error_code,
                       void *insn, int insn_len)
 {
        int r, emulation_type = EMULTYPE_PF;
-       bool direct = vcpu->arch.mmu->direct_map;
+       bool direct = vcpu->arch.mmu->root_role.direct;
 
        if (WARN_ON(!VALID_PAGE(vcpu->arch.mmu->root.hpa)))
                return RET_PF_RETRY;
@@ -5362,7 +5359,7 @@ int kvm_mmu_page_fault(struct kvm_vcpu *vcpu, gpa_t cr2_or_gpa, u64 error_code,
         * paging in both guests. If true, we simply unprotect the page
         * and resume the guest.
         */
-       if (vcpu->arch.mmu->direct_map &&
+       if (vcpu->arch.mmu->root_role.direct &&
            (error_code & PFERR_NESTED_GUEST_PAGE) == PFERR_NESTED_GUEST_PAGE) {
                kvm_mmu_unprotect_page(vcpu->kvm, gpa_to_gfn(cr2_or_gpa));
                return 1;

diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index b2b1772..ee774c7 100644 (file)
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -8101,7 +8101,7 @@ static bool reexecute_instruction(struct kvm_vcpu *vcpu, gpa_t cr2_or_gpa,
            WARN_ON_ONCE(!(emulation_type & EMULTYPE_PF)))
                return false;
 
-       if (!vcpu->arch.mmu->direct_map) {
+       if (!vcpu->arch.mmu->root_role.direct) {
                /*
                 * Write permission should be allowed since only
                 * write access need to be emulated.
@@ -8134,7 +8134,7 @@ static bool reexecute_instruction(struct kvm_vcpu *vcpu, gpa_t cr2_or_gpa,
        kvm_release_pfn_clean(pfn);
 
        /* The instructions are well-emulated on direct mmu. */
-       if (vcpu->arch.mmu->direct_map) {
+       if (vcpu->arch.mmu->root_role.direct) {
                unsigned int indirect_shadow_pages;
 
                write_lock(&vcpu->kvm->mmu_lock);
@@ -8202,7 +8202,7 @@ static bool retry_instruction(struct x86_emulate_ctxt *ctxt,
        vcpu->arch.last_retry_eip = ctxt->eip;
        vcpu->arch.last_retry_addr = cr2_or_gpa;
 
-       if (!vcpu->arch.mmu->direct_map)
+       if (!vcpu->arch.mmu->root_role.direct)
                gpa = kvm_mmu_gva_to_gpa_write(vcpu, cr2_or_gpa, NULL);
 
        kvm_mmu_unprotect_page(vcpu->kvm, gpa_to_gfn(gpa));
@@ -8482,7 +8482,7 @@ restart:
                ctxt->exception.address = cr2_or_gpa;
 
                /* With shadow page tables, cr2 contains a GVA or nGPA. */
-               if (vcpu->arch.mmu->direct_map) {
+               if (vcpu->arch.mmu->root_role.direct) {
                        ctxt->gpa_available = true;
                        ctxt->gpa_val = cr2_or_gpa;
                }
@@ -12366,7 +12366,7 @@ void kvm_arch_async_page_ready(struct kvm_vcpu *vcpu, struct kvm_async_pf *work)
 {
        int r;
 
-       if ((vcpu->arch.mmu->direct_map != work->arch.direct_map) ||
+       if ((vcpu->arch.mmu->root_role.direct != work->arch.direct_map) ||
              work->wakeup_all)
                return;
 
@@ -12374,7 +12374,7 @@ void kvm_arch_async_page_ready(struct kvm_vcpu *vcpu, struct kvm_async_pf *work)
        if (unlikely(r))
                return;
 
-       if (!vcpu->arch.mmu->direct_map &&
+       if (!vcpu->arch.mmu->root_role.direct &&
              work->arch.cr3 != vcpu->arch.mmu->get_guest_pgd(vcpu))
                return;