From patchwork Fri Jul 26 23:52:12 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Sean Christopherson X-Patchwork-Id: 13743551 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 D2AB6C3DA4A for ; Sat, 27 Jul 2024 00:26:35 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:Reply-To:List-Subscribe: List-Help:List-Post:List-Archive:List-Unsubscribe:List-Id:Content-Type:Cc:To: From:Subject:Message-ID:References:Mime-Version:In-Reply-To:Date: Content-Transfer-Encoding:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=4jqep9wI+WruRy0z2TZYbUEBq8RbIq5j1OfKKvbW4+Y=; b=AfEzp0B5AHl8Qku26+vG59wGX7 IQeeJENqpueBzuzZTbKZOBEGGOpDUK5KarUvNxQEAu1r6U+00zX+mIXQGbNK9FIPoESTCZPn5Il+E I1oBLEoTHKx+TadG7F7TLvEo04tWqGenKpER+MlcTQ9ZBpaDhMPWOvSLTpNp4u4OKOXp46R5E32Y7 +d0V4Ol2W+UW/iY6EioSCPom3JS+b+24Qs5fR9g/aUXmkvn3xY7e0k09N/jLIsSltYdaZfPgaB+i4 1SoqBM/fHViWw+/nqgrKytFFjG6Ip69NPWdXGh+8rYQxFcNOlCs1ILUMkzmN324eaCuM5Ax2PlORf CkETyBZg==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.97.1 #2 (Red Hat Linux)) id 1sXVGT-00000005gxB-0BbH; Sat, 27 Jul 2024 00:26:25 +0000 Received: from mail-pj1-x1049.google.com ([2607:f8b0:4864:20::1049]) by bombadil.infradead.org with esmtps (Exim 4.97.1 #2 (Red Hat Linux)) id 1sXUlu-00000005QtN-1TL8 for linux-arm-kernel@lists.infradead.org; Fri, 26 Jul 2024 23:54:52 +0000 Received: by mail-pj1-x1049.google.com with SMTP id 98e67ed59e1d1-2cb656e4d97so1766271a91.2 for ; Fri, 26 Jul 2024 16:54:49 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20230601; t=1722038089; x=1722642889; 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=4jqep9wI+WruRy0z2TZYbUEBq8RbIq5j1OfKKvbW4+Y=; b=VCKZxIMyozw/M1ysU0bWtw0NrDRR/bhmjKd89m8jqq5OD3+7cW/UoSW3U/4GFWMv1Q V04ak3KNqFSWoqtHdzQM+38BcI8oDOeLZhmor9tC4RMk2sWaCXFmewAf4ilPFmHlNqZU bvJHcdh586b8/spNuaCK7vbRBXYZW7FAol6YRkKUR86ol3Fs8xfwfEJkF2eq5ufnGyUU JmsTsTSurgmFOq0ETih+SMijJl8ll3IYXI3r6Q0bmxXs5yuYu4IpTxJiNv0IlnJemKgX iYtoxh3r6UoKXr67vpB0vDZQABx8iaCMWJxftBl0hD64/VnN3VwXPS4z6isuBO8AnDL4 DvDw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1722038089; x=1722642889; 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=4jqep9wI+WruRy0z2TZYbUEBq8RbIq5j1OfKKvbW4+Y=; b=toD+Kx+QA2pzlgz1CG8Z2L6L3PjgJ0PihvgPGziiHmTAFv15vSSmXkzl4wrY+LQW2z JhgaVtPoLE+DTtl6G8kJcJYxKkOtPk8Te6cE36xjsKByGgdrvRzH2YkU+6YOUC5fuqwn HdubVtaFLqMMzzfPk6njLd2bCgYuINzOdnpriMFcI2xURy/Y5jZoDrasmwbA+R2Pgf/8 6P7AA+CWiIu1pSY+lRu9zxOUNBGfB1q2RxYmuDiFPRrmNjlS1dyJ2drZvKPUDtwleiN/ cKDmiqx/0rF3QgDv64Vjh/inY+90lJTYYuNgQxDOoNLWtgLc8bkFu/jMLAKnTXPtB0Pb yrHw== X-Forwarded-Encrypted: i=1; AJvYcCWBbIBGQQHUr+gXx/ENeb0I7h4CqibeB4w4NvEDGdO5YZyYGyptCKjrQ8JgSmfj1hp1cMcGeuJED2Lt4wH/q6mYIU6IeWyBBMS0yJ4WssaoIYztNbA= X-Gm-Message-State: AOJu0Ywc1EN1XxnWVaS2/LtZpzdWImIMB/PFRG27ZpCv8sSvZuDCJM05 fBUFbJu1NWBCpgatjltWITwh4IPOFSoVYjMfG7Gb5QRwycMoRzi3vyYz75CvWEGyUyr7mKPOp38 EKA== X-Google-Smtp-Source: AGHT+IFasJAr04PTZrf6XUkQxxUmiACppU16Z34UUuO+d3NYseQpUQCzHrJDN41FkLsUjVBlqZCxQJJvuE8= X-Received: from zagreus.c.googlers.com ([fda3:e722:ac3:cc00:7f:e700:c0a8:5c37]) (user=seanjc job=sendgmr) by 2002:a17:90a:6fe5:b0:2c9:98bc:3584 with SMTP id 98e67ed59e1d1-2cf7e83a1famr42409a91.6.1722038088823; Fri, 26 Jul 2024 16:54:48 -0700 (PDT) Date: Fri, 26 Jul 2024 16:52:12 -0700 In-Reply-To: <20240726235234.228822-1-seanjc@google.com> Mime-Version: 1.0 References: <20240726235234.228822-1-seanjc@google.com> X-Mailer: git-send-email 2.46.0.rc1.232.g9752f9e123-goog Message-ID: <20240726235234.228822-64-seanjc@google.com> Subject: [PATCH v12 63/84] 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, David Matlack , David Stevens X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20240726_165450_479489_9FDC0388 X-CRM114-Status: GOOD ( 14.60 ) X-BeenThere: linux-arm-kernel@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-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=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 34e8f0b7b345..343c10dda80f 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);