From patchwork Thu Oct 10 18:24:06 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Sean Christopherson X-Patchwork-Id: 13831211 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id E3B4CD2444F for ; Thu, 10 Oct 2024 21:46:39 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:Reply-To:List-Subscribe:List-Help: List-Post:List-Archive:List-Unsubscribe:List-Id:Cc:To:From:Subject:Message-ID :References:Mime-Version:In-Reply-To:Date:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=u8gagoViXj7KP57Fs1L5Ny+JN3aowNSsP1ZsgYPo54Q=; b=3ROGeGpfMUC42F l6vBFsrP2Isl6GUBICdP7fkxPz+64hibJunATtCL44w2zScjHqV2+C+0be6iFcKnq3eHov0KSj6Kx q7T/pXxxqzCAy+yRScQ19zfPIM0xREuFZfS/z8fuswr32dwPAjNSPD6pwxLzuA7/kJhlpzp3lTO3e k2j8tvPS+GtuKFKidRRhyNylS6ampufZ5QpeOcA3MNBXDuZrTEDZoPW6cqNnfwMKNCKmJV9k6t1aP 7p7wFo9LdW31BUDyibd3Oud4J/dmMgh7OuxaAgyCA/ZArqDolAwitVSAQOLo/RD0IGZQXjBIVPM1n MvbfoLwidrhrKinsaHVQ==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98 #2 (Red Hat Linux)) id 1sz0zU-0000000ESbo-2SUd; Thu, 10 Oct 2024 21:46:36 +0000 Received: from mail-yb1-xb49.google.com ([2607:f8b0:4864:20::b49]) by bombadil.infradead.org with esmtps (Exim 4.98 #2 (Red Hat Linux)) id 1syxsT-0000000DrOv-0nqt for linux-riscv@lists.infradead.org; Thu, 10 Oct 2024 18:27:11 +0000 Received: by mail-yb1-xb49.google.com with SMTP id 3f1490d57ef6-e29088a6942so2105909276.0 for ; Thu, 10 Oct 2024 11:27:08 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20230601; t=1728584827; x=1729189627; darn=lists.infradead.org; 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=dJnHBDyCwUFZKgDYTVV2s9CsyA2Ll45yxWv/Qp8Ijpw=; b=Yw/fbnOtwrVcGPcy7qGySNhOJV6AqYCCkEKx6aIGv4uXkgcnVc6Upnl4oTw3sw05cf ecnC/qDQZE1PvYAcnxlOaiW2ZxoaFFflqxfT2puOfCO2/dZTjmot+SvaEYsNUrqoKIT3 KSm4OecDD/WjXsqjbMLjbi/q8iWRulvNi8fwIFJ4z2fUXcpfDNfPh9w7CE6vNgk6v5GV H6SrX7iC/DfPfR1P1mAo9mLwfPCXNBZJBPZunlcp/21jgbdSa4XBRWGHtBGNsbusOSTR OysSez9Nn6NNAIPq3O/DHUBoflUdQV3WEbYocMt1Y38AgKAFlFuz0TfBg5z4Z99m71DM IVTA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1728584827; x=1729189627; 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=dJnHBDyCwUFZKgDYTVV2s9CsyA2Ll45yxWv/Qp8Ijpw=; b=G5nOjxmGZ/NdaON8j0O6o104pGHvfUObMdh0Dgdz5OmwSAFljUzB1ViOd8oFE174Pb q9+S6345NPRFG77C7TEhh848yvNoS7SfNe7bTcQvqjxvZJOVGfRXkAxo/jS2vtFb5z4L 8D6PQPt0ShZy3XJwnM1rVRdVBl/y/UAXhEmczmjCiCj0niwOz9ONIf74bGHtqy5XdMn0 Lod1M0aSayZOQPwwlOTocg7VWPNHGWA+AqTVq41m7WQzkQlsnrRb+qwgTt/dNH2SK0Jq lB7tyh+N6TkuL5EbJLpvDmVxwVDGNfKvnBaNn+skbNxdOcZsJv0+h5fb33NPY1IV61Bq Ur+A== X-Forwarded-Encrypted: i=1; AJvYcCU28zdkF/8UnV6tsPHYKcrntHF+zEj0/NCEVPB6N4l9jN1IvFlf0RUgnqZqAL0eloGodVFJPvMMccz16g==@lists.infradead.org X-Gm-Message-State: AOJu0YzwrHuLoBnTRo33obZmaY5veGvEPnhbKfc7wLjQtEU4BLN/yRpT iD98j0iP9YQnkGyWA3j0MFP1h4sMs3z5g6nIn9X5cewxwAYcynS6PyZRDMCSxU0NOTh+mPbeixa 6mg== X-Google-Smtp-Source: AGHT+IE3wQG+AmAWHFVOEkWtTHcZkQX/AbMzk25RszCXWWBD0mfEZbS2aMxfU1imj+f8RQ2cZBD1mpHhlQw= X-Received: from zagreus.c.googlers.com ([fda3:e722:ac3:cc00:9d:3983:ac13:c240]) (user=seanjc job=sendgmr) by 2002:a5b:a07:0:b0:e28:ef8f:7423 with SMTP id 3f1490d57ef6-e28fe355de0mr48920276.4.1728584827639; Thu, 10 Oct 2024 11:27:07 -0700 (PDT) Date: Thu, 10 Oct 2024 11:24:06 -0700 In-Reply-To: <20241010182427.1434605-1-seanjc@google.com> Mime-Version: 1.0 References: <20241010182427.1434605-1-seanjc@google.com> X-Mailer: git-send-email 2.47.0.rc1.288.g06298d1525-goog Message-ID: <20241010182427.1434605-65-seanjc@google.com> Subject: [PATCH v13 64/85] KVM: PPC: Use kvm_faultin_pfn() to handle page faults on Book3s PR From: Sean Christopherson To: Paolo Bonzini , Marc Zyngier , Oliver Upton , Tianrui Zhao , Bibo Mao , Huacai Chen , Michael Ellerman , Anup Patel , Paul Walmsley , Palmer Dabbelt , Albert Ou , Christian Borntraeger , Janosch Frank , Claudio Imbrenda , Sean Christopherson Cc: kvm@vger.kernel.org, linux-arm-kernel@lists.infradead.org, kvmarm@lists.linux.dev, loongarch@lists.linux.dev, linux-mips@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, kvm-riscv@lists.infradead.org, linux-riscv@lists.infradead.org, linux-kernel@vger.kernel.org, " =?utf-8?q?Alex_Benn=C3=A9e?= " , Yan Zhao , David Matlack , David Stevens , Andrew Jones X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20241010_112709_347956_B4AFB36B X-CRM114-Status: GOOD ( 13.11 ) X-BeenThere: linux-riscv@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Reply-To: Sean Christopherson Sender: "linux-riscv" Errors-To: linux-riscv-bounces+linux-riscv=archiver.kernel.org@lists.infradead.org Convert Book3S PR to __kvm_faultin_pfn()+kvm_release_faultin_page(), which are new APIs to consolidate arch code and provide consistent behavior across all KVM architectures. Signed-off-by: Sean Christopherson --- arch/powerpc/include/asm/kvm_book3s.h | 2 +- arch/powerpc/kvm/book3s.c | 7 ++++--- arch/powerpc/kvm/book3s_32_mmu_host.c | 7 ++++--- arch/powerpc/kvm/book3s_64_mmu_host.c | 10 +++++----- 4 files changed, 14 insertions(+), 12 deletions(-) diff --git a/arch/powerpc/include/asm/kvm_book3s.h b/arch/powerpc/include/asm/kvm_book3s.h index 3d289dbe3982..e1ff291ba891 100644 --- a/arch/powerpc/include/asm/kvm_book3s.h +++ b/arch/powerpc/include/asm/kvm_book3s.h @@ -235,7 +235,7 @@ extern void kvmppc_set_bat(struct kvm_vcpu *vcpu, struct kvmppc_bat *bat, extern void kvmppc_giveup_ext(struct kvm_vcpu *vcpu, ulong msr); extern int kvmppc_emulate_paired_single(struct kvm_vcpu *vcpu); extern kvm_pfn_t kvmppc_gpa_to_pfn(struct kvm_vcpu *vcpu, gpa_t gpa, - bool writing, bool *writable); + bool writing, bool *writable, struct page **page); extern void kvmppc_add_revmap_chain(struct kvm *kvm, struct revmap_entry *rev, unsigned long *rmap, long pte_index, int realmode); extern void kvmppc_update_dirty_map(const struct kvm_memory_slot *memslot, diff --git a/arch/powerpc/kvm/book3s.c b/arch/powerpc/kvm/book3s.c index ff6c38373957..d79c5d1098c0 100644 --- a/arch/powerpc/kvm/book3s.c +++ b/arch/powerpc/kvm/book3s.c @@ -422,7 +422,7 @@ int kvmppc_core_prepare_to_enter(struct kvm_vcpu *vcpu) EXPORT_SYMBOL_GPL(kvmppc_core_prepare_to_enter); kvm_pfn_t kvmppc_gpa_to_pfn(struct kvm_vcpu *vcpu, gpa_t gpa, bool writing, - bool *writable) + bool *writable, struct page **page) { ulong mp_pa = vcpu->arch.magic_page_pa & KVM_PAM; gfn_t gfn = gpa >> PAGE_SHIFT; @@ -437,13 +437,14 @@ kvm_pfn_t kvmppc_gpa_to_pfn(struct kvm_vcpu *vcpu, gpa_t gpa, bool writing, kvm_pfn_t pfn; pfn = (kvm_pfn_t)virt_to_phys((void*)shared_page) >> PAGE_SHIFT; - get_page(pfn_to_page(pfn)); + *page = pfn_to_page(pfn); + get_page(*page); if (writable) *writable = true; return pfn; } - return gfn_to_pfn_prot(vcpu->kvm, gfn, writing, writable); + return kvm_faultin_pfn(vcpu, gfn, writing, writable, page); } EXPORT_SYMBOL_GPL(kvmppc_gpa_to_pfn); diff --git a/arch/powerpc/kvm/book3s_32_mmu_host.c b/arch/powerpc/kvm/book3s_32_mmu_host.c index 4b3a8d80cfa3..5b7212edbb13 100644 --- a/arch/powerpc/kvm/book3s_32_mmu_host.c +++ b/arch/powerpc/kvm/book3s_32_mmu_host.c @@ -130,6 +130,7 @@ extern char etext[]; int kvmppc_mmu_map_page(struct kvm_vcpu *vcpu, struct kvmppc_pte *orig_pte, bool iswrite) { + struct page *page; kvm_pfn_t hpaddr; u64 vpn; u64 vsid; @@ -145,7 +146,7 @@ int kvmppc_mmu_map_page(struct kvm_vcpu *vcpu, struct kvmppc_pte *orig_pte, bool writable; /* Get host physical address for gpa */ - hpaddr = kvmppc_gpa_to_pfn(vcpu, orig_pte->raddr, iswrite, &writable); + hpaddr = kvmppc_gpa_to_pfn(vcpu, orig_pte->raddr, iswrite, &writable, &page); if (is_error_noslot_pfn(hpaddr)) { printk(KERN_INFO "Couldn't get guest page for gpa %lx!\n", orig_pte->raddr); @@ -232,7 +233,7 @@ int kvmppc_mmu_map_page(struct kvm_vcpu *vcpu, struct kvmppc_pte *orig_pte, pte = kvmppc_mmu_hpte_cache_next(vcpu); if (!pte) { - kvm_release_pfn_clean(hpaddr >> PAGE_SHIFT); + kvm_release_page_unused(page); r = -EAGAIN; goto out; } @@ -250,7 +251,7 @@ int kvmppc_mmu_map_page(struct kvm_vcpu *vcpu, struct kvmppc_pte *orig_pte, kvmppc_mmu_hpte_cache_map(vcpu, pte); - kvm_release_pfn_clean(hpaddr >> PAGE_SHIFT); + kvm_release_page_clean(page); out: return r; } diff --git a/arch/powerpc/kvm/book3s_64_mmu_host.c b/arch/powerpc/kvm/book3s_64_mmu_host.c index d0e4f7bbdc3d..be20aee6fd7d 100644 --- a/arch/powerpc/kvm/book3s_64_mmu_host.c +++ b/arch/powerpc/kvm/book3s_64_mmu_host.c @@ -88,13 +88,14 @@ int kvmppc_mmu_map_page(struct kvm_vcpu *vcpu, struct kvmppc_pte *orig_pte, struct hpte_cache *cpte; unsigned long gfn = orig_pte->raddr >> PAGE_SHIFT; unsigned long pfn; + struct page *page; /* used to check for invalidations in progress */ mmu_seq = kvm->mmu_invalidate_seq; smp_rmb(); /* Get host physical address for gpa */ - pfn = kvmppc_gpa_to_pfn(vcpu, orig_pte->raddr, iswrite, &writable); + pfn = kvmppc_gpa_to_pfn(vcpu, orig_pte->raddr, iswrite, &writable, &page); if (is_error_noslot_pfn(pfn)) { printk(KERN_INFO "Couldn't get guest page for gpa %lx!\n", orig_pte->raddr); @@ -199,10 +200,9 @@ int kvmppc_mmu_map_page(struct kvm_vcpu *vcpu, struct kvmppc_pte *orig_pte, } out_unlock: - if (!orig_pte->may_write || !writable) - kvm_release_pfn_clean(pfn); - else - kvm_release_pfn_dirty(pfn); + /* FIXME: Don't unconditionally pass unused=false. */ + kvm_release_faultin_page(kvm, page, false, + orig_pte->may_write && writable); spin_unlock(&kvm->mmu_lock); if (cpte) kvmppc_mmu_hpte_cache_free(cpte);