From 2a7266a8f9074f03c014dca641721d451881a42b Mon Sep 17 00:00:00 2001 From: Yu Zhang Date: Thu, 24 Aug 2017 20:27:54 +0800 Subject: [PATCH] KVM: MMU: Rename PT64_ROOT_LEVEL to PT64_ROOT_4LEVEL. Now we have 4 level page table and 5 level page table in 64 bits long mode, let's rename the PT64_ROOT_LEVEL to PT64_ROOT_4LEVEL, then we can use PT64_ROOT_5LEVEL for 5 level page table, it's helpful to make the code more clear. Also PT64_ROOT_MAX_LEVEL is defined as 4, so that we can just redefine it to 5 whenever a replacement is needed for 5 level paging. Signed-off-by: Yu Zhang Signed-off-by: Paolo Bonzini --- arch/x86/include/asm/kvm_host.h | 4 +++- arch/x86/kvm/mmu.c | 36 ++++++++++++++++----------------- arch/x86/kvm/mmu.h | 2 +- arch/x86/kvm/mmu_audit.c | 4 ++-- arch/x86/kvm/svm.c | 2 +- 5 files changed, 25 insertions(+), 23 deletions(-) diff --git a/arch/x86/include/asm/kvm_host.h b/arch/x86/include/asm/kvm_host.h index e7162285b22e..5907d46d306d 100644 --- a/arch/x86/include/asm/kvm_host.h +++ b/arch/x86/include/asm/kvm_host.h @@ -315,8 +315,10 @@ struct kvm_pio_request { int size; }; +#define PT64_ROOT_MAX_LEVEL 4 + struct rsvd_bits_validate { - u64 rsvd_bits_mask[2][4]; + u64 rsvd_bits_mask[2][PT64_ROOT_MAX_LEVEL]; u64 bad_mt_xwr; }; diff --git a/arch/x86/kvm/mmu.c b/arch/x86/kvm/mmu.c index 2dafd36368cc..3faa20cfdd5f 100644 --- a/arch/x86/kvm/mmu.c +++ b/arch/x86/kvm/mmu.c @@ -2167,8 +2167,8 @@ static bool kvm_sync_pages(struct kvm_vcpu *vcpu, gfn_t gfn, } struct mmu_page_path { - struct kvm_mmu_page *parent[PT64_ROOT_LEVEL]; - unsigned int idx[PT64_ROOT_LEVEL]; + struct kvm_mmu_page *parent[PT64_ROOT_MAX_LEVEL]; + unsigned int idx[PT64_ROOT_MAX_LEVEL]; }; #define for_each_sp(pvec, sp, parents, i) \ @@ -2383,8 +2383,8 @@ static void shadow_walk_init(struct kvm_shadow_walk_iterator *iterator, iterator->shadow_addr = vcpu->arch.mmu.root_hpa; iterator->level = vcpu->arch.mmu.shadow_root_level; - if (iterator->level == PT64_ROOT_LEVEL && - vcpu->arch.mmu.root_level < PT64_ROOT_LEVEL && + if (iterator->level == PT64_ROOT_4LEVEL && + vcpu->arch.mmu.root_level < PT64_ROOT_4LEVEL && !vcpu->arch.mmu.direct_map) --iterator->level; @@ -3322,8 +3322,8 @@ static void mmu_free_roots(struct kvm_vcpu *vcpu) if (!VALID_PAGE(vcpu->arch.mmu.root_hpa)) return; - if (vcpu->arch.mmu.shadow_root_level == PT64_ROOT_LEVEL && - (vcpu->arch.mmu.root_level == PT64_ROOT_LEVEL || + if (vcpu->arch.mmu.shadow_root_level == PT64_ROOT_4LEVEL && + (vcpu->arch.mmu.root_level == PT64_ROOT_4LEVEL || vcpu->arch.mmu.direct_map)) { hpa_t root = vcpu->arch.mmu.root_hpa; @@ -3375,13 +3375,13 @@ static int mmu_alloc_direct_roots(struct kvm_vcpu *vcpu) struct kvm_mmu_page *sp; unsigned i; - if (vcpu->arch.mmu.shadow_root_level == PT64_ROOT_LEVEL) { + if (vcpu->arch.mmu.shadow_root_level == PT64_ROOT_4LEVEL) { spin_lock(&vcpu->kvm->mmu_lock); if(make_mmu_pages_available(vcpu) < 0) { spin_unlock(&vcpu->kvm->mmu_lock); return 1; } - sp = kvm_mmu_get_page(vcpu, 0, 0, PT64_ROOT_LEVEL, 1, ACC_ALL); + sp = kvm_mmu_get_page(vcpu, 0, 0, PT64_ROOT_4LEVEL, 1, ACC_ALL); ++sp->root_count; spin_unlock(&vcpu->kvm->mmu_lock); vcpu->arch.mmu.root_hpa = __pa(sp->spt); @@ -3425,7 +3425,7 @@ static int mmu_alloc_shadow_roots(struct kvm_vcpu *vcpu) * Do we shadow a long mode page table? If so we need to * write-protect the guests page table root. */ - if (vcpu->arch.mmu.root_level == PT64_ROOT_LEVEL) { + if (vcpu->arch.mmu.root_level == PT64_ROOT_4LEVEL) { hpa_t root = vcpu->arch.mmu.root_hpa; MMU_WARN_ON(VALID_PAGE(root)); @@ -3435,7 +3435,7 @@ static int mmu_alloc_shadow_roots(struct kvm_vcpu *vcpu) spin_unlock(&vcpu->kvm->mmu_lock); return 1; } - sp = kvm_mmu_get_page(vcpu, root_gfn, 0, PT64_ROOT_LEVEL, + sp = kvm_mmu_get_page(vcpu, root_gfn, 0, PT64_ROOT_4LEVEL, 0, ACC_ALL); root = __pa(sp->spt); ++sp->root_count; @@ -3450,7 +3450,7 @@ static int mmu_alloc_shadow_roots(struct kvm_vcpu *vcpu) * the shadow page table may be a PAE or a long mode page table. */ pm_mask = PT_PRESENT_MASK; - if (vcpu->arch.mmu.shadow_root_level == PT64_ROOT_LEVEL) + if (vcpu->arch.mmu.shadow_root_level == PT64_ROOT_4LEVEL) pm_mask |= PT_ACCESSED_MASK | PT_WRITABLE_MASK | PT_USER_MASK; for (i = 0; i < 4; ++i) { @@ -3486,7 +3486,7 @@ static int mmu_alloc_shadow_roots(struct kvm_vcpu *vcpu) * If we shadow a 32 bit page table with a long mode page * table we enter this path. */ - if (vcpu->arch.mmu.shadow_root_level == PT64_ROOT_LEVEL) { + if (vcpu->arch.mmu.shadow_root_level == PT64_ROOT_4LEVEL) { if (vcpu->arch.mmu.lm_root == NULL) { /* * The additional page necessary for this is only @@ -3531,7 +3531,7 @@ static void mmu_sync_roots(struct kvm_vcpu *vcpu) vcpu_clear_mmio_info(vcpu, MMIO_GVA_ANY); kvm_mmu_audit(vcpu, AUDIT_PRE_SYNC); - if (vcpu->arch.mmu.root_level == PT64_ROOT_LEVEL) { + if (vcpu->arch.mmu.root_level == PT64_ROOT_4LEVEL) { hpa_t root = vcpu->arch.mmu.root_hpa; sp = page_header(root); mmu_sync_children(vcpu, sp); @@ -3614,7 +3614,7 @@ static bool walk_shadow_page_get_mmio_spte(struct kvm_vcpu *vcpu, u64 addr, u64 *sptep) { struct kvm_shadow_walk_iterator iterator; - u64 sptes[PT64_ROOT_LEVEL], spte = 0ull; + u64 sptes[PT64_ROOT_MAX_LEVEL], spte = 0ull; int root, leaf; bool reserved = false; @@ -4057,7 +4057,7 @@ __reset_rsvds_bits_mask(struct kvm_vcpu *vcpu, rsvd_check->rsvd_bits_mask[1][0] = rsvd_check->rsvd_bits_mask[0][0]; break; - case PT64_ROOT_LEVEL: + case PT64_ROOT_4LEVEL: rsvd_check->rsvd_bits_mask[0][3] = exb_bit_rsvd | nonleaf_bit8_rsvd | rsvd_bits(7, 7) | rsvd_bits(maxphyaddr, 51); @@ -4367,7 +4367,7 @@ static void paging64_init_context_common(struct kvm_vcpu *vcpu, static void paging64_init_context(struct kvm_vcpu *vcpu, struct kvm_mmu *context) { - paging64_init_context_common(vcpu, context, PT64_ROOT_LEVEL); + paging64_init_context_common(vcpu, context, PT64_ROOT_4LEVEL); } static void paging32_init_context(struct kvm_vcpu *vcpu, @@ -4422,7 +4422,7 @@ static void init_kvm_tdp_mmu(struct kvm_vcpu *vcpu) context->root_level = 0; } else if (is_long_mode(vcpu)) { context->nx = is_nx(vcpu); - context->root_level = PT64_ROOT_LEVEL; + context->root_level = PT64_ROOT_4LEVEL; reset_rsvds_bits_mask(vcpu, context); context->gva_to_gpa = paging64_gva_to_gpa; } else if (is_pae(vcpu)) { @@ -4533,7 +4533,7 @@ static void init_kvm_nested_mmu(struct kvm_vcpu *vcpu) g_context->gva_to_gpa = nonpaging_gva_to_gpa_nested; } else if (is_long_mode(vcpu)) { g_context->nx = is_nx(vcpu); - g_context->root_level = PT64_ROOT_LEVEL; + g_context->root_level = PT64_ROOT_4LEVEL; reset_rsvds_bits_mask(vcpu, g_context); g_context->gva_to_gpa = paging64_gva_to_gpa_nested; } else if (is_pae(vcpu)) { diff --git a/arch/x86/kvm/mmu.h b/arch/x86/kvm/mmu.h index 67e7ec2eb7e0..45b9a11e6ee7 100644 --- a/arch/x86/kvm/mmu.h +++ b/arch/x86/kvm/mmu.h @@ -37,7 +37,7 @@ #define PT32_DIR_PSE36_MASK \ (((1ULL << PT32_DIR_PSE36_SIZE) - 1) << PT32_DIR_PSE36_SHIFT) -#define PT64_ROOT_LEVEL 4 +#define PT64_ROOT_4LEVEL 4 #define PT32_ROOT_LEVEL 2 #define PT32E_ROOT_LEVEL 3 diff --git a/arch/x86/kvm/mmu_audit.c b/arch/x86/kvm/mmu_audit.c index dcce533d420c..2e6996d9801f 100644 --- a/arch/x86/kvm/mmu_audit.c +++ b/arch/x86/kvm/mmu_audit.c @@ -62,11 +62,11 @@ static void mmu_spte_walk(struct kvm_vcpu *vcpu, inspect_spte_fn fn) if (!VALID_PAGE(vcpu->arch.mmu.root_hpa)) return; - if (vcpu->arch.mmu.root_level == PT64_ROOT_LEVEL) { + if (vcpu->arch.mmu.root_level == PT64_ROOT_4LEVEL) { hpa_t root = vcpu->arch.mmu.root_hpa; sp = page_header(root); - __mmu_spte_walk(vcpu, sp, fn, PT64_ROOT_LEVEL); + __mmu_spte_walk(vcpu, sp, fn, PT64_ROOT_4LEVEL); return; } diff --git a/arch/x86/kvm/svm.c b/arch/x86/kvm/svm.c index c5b9705186d6..7fc64a5fe4f6 100644 --- a/arch/x86/kvm/svm.c +++ b/arch/x86/kvm/svm.c @@ -584,7 +584,7 @@ static inline void invlpga(unsigned long addr, u32 asid) static int get_npt_level(void) { #ifdef CONFIG_X86_64 - return PT64_ROOT_LEVEL; + return PT64_ROOT_4LEVEL; #else return PT32E_ROOT_LEVEL; #endif -- GitLab