linux-kernel - [RFC PATCH 13/13] KVM: x86: remove struct kvm_arch.tdp_max_page

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Date:   Sun,  7 Aug 2022 15:18:46 -0700
From:   isaku.yamahata@...el.com
To:     kvm@...r.kernel.org, linux-kernel@...r.kernel.org
Cc:     isaku.yamahata@...el.com, isaku.yamahata@...il.com,
        Paolo Bonzini <pbonzini@...hat.com>, erdemaktas@...gle.com,
        Sean Christopherson <seanjc@...gle.com>,
        Sagi Shahar <sagis@...gle.com>
Subject: [RFC PATCH 13/13] KVM: x86: remove struct kvm_arch.tdp_max_page_level

From: Xiaoyao Li <xiaoyao.li@...el.com>

Now that everything is there to support large page for TD guest.  Remove
tdp_max_page_level from struct kvm_arch that limits the page size.

Signed-off-by: Xiaoyao Li <xiaoyao.li@...el.com>
Signed-off-by: Isaku Yamahata <isaku.yamahata@...el.com>
---
 arch/x86/include/asm/kvm_host.h | 1 -
 arch/x86/kvm/mmu/mmu.c          | 1 -
 arch/x86/kvm/mmu/mmu_internal.h | 2 +-
 arch/x86/kvm/vmx/tdx.c          | 3 ---
 4 files changed, 1 insertion(+), 6 deletions(-)

diff --git a/arch/x86/include/asm/kvm_host.h b/arch/x86/include/asm/kvm_host.h
index a6bfcabcbbd7..80f2bc3fbf0c 100644
--- a/arch/x86/include/asm/kvm_host.h
+++ b/arch/x86/include/asm/kvm_host.h
@@ -1190,7 +1190,6 @@ struct kvm_arch {
 	unsigned long n_requested_mmu_pages;
 	unsigned long n_max_mmu_pages;
 	unsigned int indirect_shadow_pages;
-	int tdp_max_page_level;
 	u8 mmu_valid_gen;
 	struct hlist_head mmu_page_hash[KVM_NUM_MMU_PAGES];
 	struct list_head active_mmu_pages;
diff --git a/arch/x86/kvm/mmu/mmu.c b/arch/x86/kvm/mmu/mmu.c
index ba21503fa46f..0cbd52c476d7 100644
--- a/arch/x86/kvm/mmu/mmu.c
+++ b/arch/x86/kvm/mmu/mmu.c
@@ -6232,7 +6232,6 @@ int kvm_mmu_init_vm(struct kvm *kvm)
 	kvm->arch.split_desc_cache.kmem_cache = pte_list_desc_cache;
 	kvm->arch.split_desc_cache.gfp_zero = __GFP_ZERO;
 
-	kvm->arch.tdp_max_page_level = KVM_MAX_HUGEPAGE_LEVEL;
 	return 0;
 }
 
diff --git a/arch/x86/kvm/mmu/mmu_internal.h b/arch/x86/kvm/mmu/mmu_internal.h
index e5d5fea29bfa..82b220c4d1bd 100644
--- a/arch/x86/kvm/mmu/mmu_internal.h
+++ b/arch/x86/kvm/mmu/mmu_internal.h
@@ -395,7 +395,7 @@ static inline int kvm_mmu_do_page_fault(struct kvm_vcpu *vcpu, gpa_t cr2_or_gpa,
 			is_nx_huge_page_enabled(vcpu->kvm),
 		.is_private = kvm_is_private_gpa(vcpu->kvm, cr2_or_gpa),
 
-		.max_level = vcpu->kvm->arch.tdp_max_page_level,
+		.max_level = KVM_MAX_HUGEPAGE_LEVEL,
 		.req_level = PG_LEVEL_4K,
 		.goal_level = PG_LEVEL_4K,
 	};
diff --git a/arch/x86/kvm/vmx/tdx.c b/arch/x86/kvm/vmx/tdx.c
index a340caeb9c62..72f21f5f78af 100644
--- a/arch/x86/kvm/vmx/tdx.c
+++ b/arch/x86/kvm/vmx/tdx.c
@@ -460,9 +460,6 @@ int tdx_vm_init(struct kvm *kvm)
 	 */
 	kvm_mmu_set_mmio_spte_mask(kvm, 0, VMX_EPT_RWX_MASK);
 
-	/* TODO: Enable 2mb and 1gb large page support. */
-	kvm->arch.tdp_max_page_level = PG_LEVEL_4K;
-
 	/* vCPUs can't be created until after KVM_TDX_INIT_VM. */
 	kvm->max_vcpus = 0;
 
-- 
2.25.1