From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-pj1-f73.google.com (mail-pj1-f73.google.com [209.85.216.73]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id D113B244664 for ; Fri, 17 Oct 2025 00:32:57 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.216.73 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1760661180; cv=none; b=HTXVJUnhT2R6y0ILS8UABdlsfLPsvigyLL3ogP1MB1b7O2UADOkiNxn7D/z4b6ULlKLl/1g2Fx5XMCSLjhOdEqmJIk/Y5jU2RoypE97TJihmj1DeT6XuTmvye5/3Q86bf1AZtFW3BW8CI39AAcnetaedQsy2Coptja0nE+jqqPY= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1760661180; c=relaxed/simple; bh=lN6TxI+PfhLHjdoqy+h+mIIhaLO+a3s8opjxmb2B/Lc=; h=Date:In-Reply-To:Mime-Version:References:Message-ID:Subject:From: To:Cc:Content-Type; b=l1SCar/h+n0uygYyrrcrGn9nd5I/YGNgxb6HBGXNjLpFX4nyEnbs1wGh0vCpjHeylcaBpsDMOPk8bpP6mp57tvXpUt/K5ZDC8R2KcFTaAhqGI//kcnNYCJzqv+Uy566ksCg2UjCeiEnrGOOs2T2OJL/ZYghBod8g8cJSxcFchQI= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=google.com; spf=pass smtp.mailfrom=flex--seanjc.bounces.google.com; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b=OoxmptsQ; arc=none smtp.client-ip=209.85.216.73 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=google.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=flex--seanjc.bounces.google.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b="OoxmptsQ" Received: by mail-pj1-f73.google.com with SMTP id 98e67ed59e1d1-33bc5d7c289so1447830a91.0 for ; Thu, 16 Oct 2025 17:32:57 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20230601; t=1760661177; x=1761265977; darn=lists.linux.dev; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:reply-to:from:to:cc:subject:date:message-id:reply-to; bh=YWIeng8BsOTkZWInydege0vVgImBIZwpoQ1m6PsVarA=; b=OoxmptsQ+WqIyPddDlpDwB+DHjplUpstA4n3ImffLnhkSwdt+N8/rUwq8LR/0eeLrD aEPQWutBfXoyhPns9WVZt1ifTHuC/wsJ6QFoS8i/UbNjfVRplAPQWIGIQIdxxk03ZJ3j m/EB7vYnWDFTlwKuUlLz1tVjx6hRQIAfgfDSyQUOWnbrjgDPfA5G2gjiW22OddbgHxfB 9Z0qyJS3k8+S0h54oT+j6fCt27igzF8EO3/pzF1yJc3bn1/8Ynr9OWsPiISLYtxIbvZA P1sq/ZEw8ej2kYdblkvGcmjO4ckUBa7kcGsy7ySEYC4NxTdDdQPO08Y6zrlWIkzJwriS /wQw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1760661177; x=1761265977; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:reply-to:x-gm-message-state:from:to:cc:subject:date:message-id :reply-to; bh=YWIeng8BsOTkZWInydege0vVgImBIZwpoQ1m6PsVarA=; b=wtyfX2hVeQrvaC/RJwcaSQx9je64xp/avNP9Nr175sT5Ue1yBTWP8H4wP3sOiYZ8C4 URrV/6IlH9YrWrE+Zz9pl5gkLCLEldcLBVZ+vOKw+b9R0IxFbPl+LOZNiMxrTZb527A9 yaWiUZapT/rT7JJ8w+IaehygebljSX95B/etaqkQ6XxdUSMlQ78/IDVGYg4OmRA5cmpt M6r/RxFiu8GMrIBq2X7tynFubMUVMmH2kLcvuMXCcIjYqB6lDKo4YMOMCE/sbvdkLcZb HyVfVLVdp9Dw9f93Mf0CYvXdVZSx3bIdSvNaUqmfU91xe/i26H1v+LDQiuJUFs+SiVHv V8ow== X-Forwarded-Encrypted: i=1; AJvYcCWBW22SORLbzCa1ChIweyqkYHOZHfefAi0urjld11GHxuv42+49llP2L0UEikkpBXO1zzgUuhtXgs1d@lists.linux.dev X-Gm-Message-State: AOJu0Yz/DUBf/9t90hY/O1K9vLrONase93ckEVDbX/fFoyqeIIVrorn1 DFCJSI6BzxubR/8wbC0qMi4RuOs/Z/d9YbpwnyLNAPLTy5PYpEfUPkdweY0ISRnXGz/sZcCRNgu FdhmWEg== X-Google-Smtp-Source: AGHT+IFms9prLqRWu4j+VpVVO9qXU7xKhQ1tryuBH0Kw5CCld5HGLDevmfw2rLOsCJwDJFMJbPJJK8xVq/g= X-Received: from pjzh17.prod.google.com ([2002:a17:90a:ea91:b0:32f:46d:993b]) (user=seanjc job=prod-delivery.src-stubby-dispatcher) by 2002:a17:90b:2789:b0:330:6d5e:f17b with SMTP id 98e67ed59e1d1-33bcf8fa140mr1764119a91.21.1760661177139; Thu, 16 Oct 2025 17:32:57 -0700 (PDT) Reply-To: Sean Christopherson Date: Thu, 16 Oct 2025 17:32:23 -0700 In-Reply-To: <20251017003244.186495-1-seanjc@google.com> Precedence: bulk X-Mailing-List: linux-coco@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 References: <20251017003244.186495-1-seanjc@google.com> X-Mailer: git-send-email 2.51.0.858.gf9c4a03a3a-goog Message-ID: <20251017003244.186495-6-seanjc@google.com> Subject: [PATCH v3 05/25] Revert "KVM: x86/tdp_mmu: Add a helper function to walk down the TDP MMU" From: Sean Christopherson To: Marc Zyngier , Oliver Upton , Tianrui Zhao , Bibo Mao , Huacai Chen , Madhavan Srinivasan , Anup Patel , Paul Walmsley , Palmer Dabbelt , Albert Ou , Christian Borntraeger , Janosch Frank , Claudio Imbrenda , Sean Christopherson , Paolo Bonzini , "Kirill A. Shutemov" Cc: linux-arm-kernel@lists.infradead.org, kvmarm@lists.linux.dev, kvm@vger.kernel.org, loongarch@lists.linux.dev, linux-mips@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, kvm-riscv@lists.infradead.org, linux-riscv@lists.infradead.org, x86@kernel.org, linux-coco@lists.linux.dev, linux-kernel@vger.kernel.org, Ira Weiny , Kai Huang , Michael Roth , Yan Zhao , Vishal Annapurve , Rick Edgecombe , Ackerley Tng , Binbin Wu Content-Type: text/plain; charset="UTF-8" Remove the helper and exports that were added to allow TDX code to reuse kvm_tdp_map_page() for its gmem post-populate flow now that a dedicated TDP MMU API is provided to install a mapping given a gfn+pfn pair. This reverts commit 2608f105760115e94a03efd9f12f8fbfd1f9af4b. Reviewed-by: Rick Edgecombe Signed-off-by: Sean Christopherson --- arch/x86/kvm/mmu.h | 2 -- arch/x86/kvm/mmu/mmu.c | 4 ++-- arch/x86/kvm/mmu/tdp_mmu.c | 37 +++++-------------------------------- 3 files changed, 7 insertions(+), 36 deletions(-) diff --git a/arch/x86/kvm/mmu.h b/arch/x86/kvm/mmu.h index 2f108e381959..9e5045a60d8b 100644 --- a/arch/x86/kvm/mmu.h +++ b/arch/x86/kvm/mmu.h @@ -257,8 +257,6 @@ extern bool tdp_mmu_enabled; #define tdp_mmu_enabled false #endif -bool kvm_tdp_mmu_gpa_is_mapped(struct kvm_vcpu *vcpu, u64 gpa); -int kvm_tdp_map_page(struct kvm_vcpu *vcpu, gpa_t gpa, u64 error_code, u8 *level); int kvm_tdp_mmu_map_private_pfn(struct kvm_vcpu *vcpu, gfn_t gfn, kvm_pfn_t pfn); static inline bool kvm_memslots_have_rmaps(struct kvm *kvm) diff --git a/arch/x86/kvm/mmu/mmu.c b/arch/x86/kvm/mmu/mmu.c index ba5cca825a7f..3711dba92440 100644 --- a/arch/x86/kvm/mmu/mmu.c +++ b/arch/x86/kvm/mmu/mmu.c @@ -4924,7 +4924,8 @@ int kvm_tdp_page_fault(struct kvm_vcpu *vcpu, struct kvm_page_fault *fault) return direct_page_fault(vcpu, fault); } -int kvm_tdp_map_page(struct kvm_vcpu *vcpu, gpa_t gpa, u64 error_code, u8 *level) +static int kvm_tdp_map_page(struct kvm_vcpu *vcpu, gpa_t gpa, u64 error_code, + u8 *level) { int r; @@ -4966,7 +4967,6 @@ int kvm_tdp_map_page(struct kvm_vcpu *vcpu, gpa_t gpa, u64 error_code, u8 *level return -EIO; } } -EXPORT_SYMBOL_FOR_KVM_INTERNAL(kvm_tdp_map_page); long kvm_arch_vcpu_pre_fault_memory(struct kvm_vcpu *vcpu, struct kvm_pre_fault_memory *range) diff --git a/arch/x86/kvm/mmu/tdp_mmu.c b/arch/x86/kvm/mmu/tdp_mmu.c index c5734ca5c17d..9b4006c2120e 100644 --- a/arch/x86/kvm/mmu/tdp_mmu.c +++ b/arch/x86/kvm/mmu/tdp_mmu.c @@ -1939,13 +1939,16 @@ bool kvm_tdp_mmu_write_protect_gfn(struct kvm *kvm, * * Must be called between kvm_tdp_mmu_walk_lockless_{begin,end}. */ -static int __kvm_tdp_mmu_get_walk(struct kvm_vcpu *vcpu, u64 addr, u64 *sptes, - struct kvm_mmu_page *root) +int kvm_tdp_mmu_get_walk(struct kvm_vcpu *vcpu, u64 addr, u64 *sptes, + int *root_level) { + struct kvm_mmu_page *root = root_to_sp(vcpu->arch.mmu->root.hpa); struct tdp_iter iter; gfn_t gfn = addr >> PAGE_SHIFT; int leaf = -1; + *root_level = vcpu->arch.mmu->root_role.level; + for_each_tdp_pte(iter, vcpu->kvm, root, gfn, gfn + 1) { leaf = iter.level; sptes[leaf] = iter.old_spte; @@ -1954,36 +1957,6 @@ static int __kvm_tdp_mmu_get_walk(struct kvm_vcpu *vcpu, u64 addr, u64 *sptes, return leaf; } -int kvm_tdp_mmu_get_walk(struct kvm_vcpu *vcpu, u64 addr, u64 *sptes, - int *root_level) -{ - struct kvm_mmu_page *root = root_to_sp(vcpu->arch.mmu->root.hpa); - *root_level = vcpu->arch.mmu->root_role.level; - - return __kvm_tdp_mmu_get_walk(vcpu, addr, sptes, root); -} - -bool kvm_tdp_mmu_gpa_is_mapped(struct kvm_vcpu *vcpu, u64 gpa) -{ - struct kvm *kvm = vcpu->kvm; - bool is_direct = kvm_is_addr_direct(kvm, gpa); - hpa_t root = is_direct ? vcpu->arch.mmu->root.hpa : - vcpu->arch.mmu->mirror_root_hpa; - u64 sptes[PT64_ROOT_MAX_LEVEL + 1], spte; - int leaf; - - lockdep_assert_held(&kvm->mmu_lock); - rcu_read_lock(); - leaf = __kvm_tdp_mmu_get_walk(vcpu, gpa, sptes, root_to_sp(root)); - rcu_read_unlock(); - if (leaf < 0) - return false; - - spte = sptes[leaf]; - return is_shadow_present_pte(spte) && is_last_spte(spte, leaf); -} -EXPORT_SYMBOL_FOR_KVM_INTERNAL(kvm_tdp_mmu_gpa_is_mapped); - /* * Returns the last level spte pointer of the shadow page walk for the given * gpa, and sets *spte to the spte value. This spte may be non-preset. If no -- 2.51.0.858.gf9c4a03a3a-goog