From patchwork Fri Jul 26 23:52:05 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Sean Christopherson X-Patchwork-Id: 1965558 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@legolas.ozlabs.org Authentication-Results: legolas.ozlabs.org; dkim=fail reason="signature verification failed" (2048-bit key; unprotected) header.d=google.com header.i=@google.com header.a=rsa-sha256 header.s=20230601 header.b=VSeBerPC; dkim-atps=neutral Authentication-Results: legolas.ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=lists.ozlabs.org (client-ip=112.213.38.117; helo=lists.ozlabs.org; envelope-from=linuxppc-dev-bounces+incoming=patchwork.ozlabs.org@lists.ozlabs.org; receiver=patchwork.ozlabs.org) Received: from lists.ozlabs.org (lists.ozlabs.org [112.213.38.117]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (secp384r1)) (No client certificate requested) by legolas.ozlabs.org (Postfix) with ESMTPS id 4WW5CT3YWLz1ybY for ; Sat, 27 Jul 2024 10:31:33 +1000 (AEST) Authentication-Results: lists.ozlabs.org; dkim=fail reason="signature verification failed" (2048-bit key; unprotected) header.d=google.com header.i=@google.com header.a=rsa-sha256 header.s=20230601 header.b=VSeBerPC; dkim-atps=neutral Received: from boromir.ozlabs.org (localhost [IPv6:::1]) by lists.ozlabs.org (Postfix) with ESMTP id 4WW5CT0n3yz3dXQ for ; Sat, 27 Jul 2024 10:31:33 +1000 (AEST) X-Original-To: linuxppc-dev@lists.ozlabs.org Delivered-To: linuxppc-dev@lists.ozlabs.org Authentication-Results: lists.ozlabs.org; dmarc=pass (p=reject dis=none) header.from=google.com Authentication-Results: lists.ozlabs.org; dkim=pass (2048-bit key; unprotected) header.d=google.com header.i=@google.com header.a=rsa-sha256 header.s=20230601 header.b=VSeBerPC; dkim-atps=neutral Authentication-Results: lists.ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=flex--seanjc.bounces.google.com (client-ip=2607:f8b0:4864:20::104a; helo=mail-pj1-x104a.google.com; envelope-from=3otekzgykdhqkwsfbuyggydw.ugedafmphhu-vwndaklk.grdstk.gjy@flex--seanjc.bounces.google.com; receiver=lists.ozlabs.org) Received: from mail-pj1-x104a.google.com (mail-pj1-x104a.google.com [IPv6:2607:f8b0:4864:20::104a]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by lists.ozlabs.org (Postfix) with ESMTPS id 4WW4Nr1BMDz3fRY for ; Sat, 27 Jul 2024 09:54:36 +1000 (AEST) Received: by mail-pj1-x104a.google.com with SMTP id 98e67ed59e1d1-2cb7364bac9so1380486a91.0 for ; Fri, 26 Jul 2024 16:54:36 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20230601; t=1722038074; x=1722642874; darn=lists.ozlabs.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=EmJI7mCwitfWH+6LwHkJyXugWKEFSS3lkF1NSC2iA8Y=; b=VSeBerPCkC9egzdeMB3niMN2+1mn2OumSaU61oDplUOnwawSAD6Ot5nLAy2R9ro8zW fMn2b75bfXj9ZZpBtSPdYLS7zLA6tDbeVnXAFuL727R4BKAlm9VUw3O9ZLNe0MmmvUkZ nNZq4bo93n3ImoUKFmACvSkdIguzlzDF6bV7iP868nqp2izirtrL8PqGDfwq4oP57kOs gidnsSDWaMQ36JIbNk4XS9RwzyoxC32PAmR9TnhPpXA3LjqfMtYe0rDSFN9BukNJJPWZ eH5TbSFf8kNfsfiZdN13cC7vrb5HadcJdvIBnLx9ehVyzYmakIIWdlEtN03v99X+CrEL Bf+w== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1722038074; x=1722642874; 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=EmJI7mCwitfWH+6LwHkJyXugWKEFSS3lkF1NSC2iA8Y=; b=lu6zJEViV6uN/u24r9f6Y9Oi9xRIrWiPyjiVunyDePIEHc3bhrH6lVHMN/jHl3Utl5 O8e0iMU2GVyDJBlvIz2FSBA3/61YYmLImPj4UOUP8pQlMAam1Ak5QOLsALUC0cQ7DGRp SQFltTmImG4KAnYzxNoHPIs4FMZd0TeT6uNkBrcRqc+4Sg7hcMJg2f4yiQX1ZY/XedUs AL/T5QFW/jskt5qnFjTRWxUVOT2Ujl47DbhZDp+PQo1eLkFWb7kdCQhF2Lrh2wyIVlCS 4/Ks2pc757dBlPV/hqeKOR/N3pAyNsDF0bmWBVbPgVDsbOkn6Ay/Ka704Us8iNF1GTET BE8w== X-Forwarded-Encrypted: i=1; AJvYcCW1X5VrsDmDhwZq+3+1ASZolc/P063xn6oCQtETfQU1x/Lgvmc8zNWHlOUtwXGUsveONvd006ntZXnYdkQmbaxFsO1V7EwAx9oTriHZLA== X-Gm-Message-State: AOJu0Yz6MJ2G+P9Yqk+dZgi10g22+afTWrcIdlmrqowRYvYCo/k04zFE 9HKtcp2tbS7fCnYIIgNyw/jdlSgQhBDQrbwNTvYnpyRJShr9RlouKZDDmriJaGKT3KyCYgfwHWc Z0w== X-Google-Smtp-Source: AGHT+IG4DskQJpICSO/7ZhzoCwUBvTBXkkJhFyAvydTVcsfBboV7ccXE3z2KESMy5r+D4xCglFGTF0FLhYg= X-Received: from zagreus.c.googlers.com ([fda3:e722:ac3:cc00:7f:e700:c0a8:5c37]) (user=seanjc job=sendgmr) by 2002:a17:90a:470e:b0:2c8:632:7efe with SMTP id 98e67ed59e1d1-2cf7d1673aamr10630a91.4.1722038073062; Fri, 26 Jul 2024 16:54:33 -0700 (PDT) Date: Fri, 26 Jul 2024 16:52:05 -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: <20240726235234.228822-57-seanjc@google.com> Subject: [PATCH v12 56/84] KVM: RISC-V: Mark "struct page" pfns dirty iff a stage-2 PTE is installed 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 X-BeenThere: linuxppc-dev@lists.ozlabs.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Reply-To: Sean Christopherson Cc: kvm-riscv@lists.infradead.org, kvm@vger.kernel.org, linux-mips@vger.kernel.org, linux-kernel@vger.kernel.org, David Matlack , David Stevens , loongarch@lists.linux.dev, kvmarm@lists.linux.dev, linux-riscv@lists.infradead.org, linuxppc-dev@lists.ozlabs.org, linux-arm-kernel@lists.infradead.org Errors-To: linuxppc-dev-bounces+incoming=patchwork.ozlabs.org@lists.ozlabs.org Sender: "Linuxppc-dev" Don't mark pages dirty if KVM bails from the page fault handler without installing a stage-2 mapping, i.e. if the page is guaranteed to not be written by the guest. In addition to being a (very) minor fix, this paves the way for converting RISC-V to use kvm_release_faultin_page(). Signed-off-by: Sean Christopherson Reviewed-by: Andrew Jones Acked-by: Anup Patel --- arch/riscv/kvm/mmu.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/arch/riscv/kvm/mmu.c b/arch/riscv/kvm/mmu.c index b63650f9b966..06aa5a0d056d 100644 --- a/arch/riscv/kvm/mmu.c +++ b/arch/riscv/kvm/mmu.c @@ -669,7 +669,6 @@ int kvm_riscv_gstage_map(struct kvm_vcpu *vcpu, goto out_unlock; if (writable) { - kvm_set_pfn_dirty(hfn); mark_page_dirty(kvm, gfn); ret = gstage_map_page(kvm, pcache, gpa, hfn << PAGE_SHIFT, vma_pagesize, false, true); @@ -682,6 +681,9 @@ int kvm_riscv_gstage_map(struct kvm_vcpu *vcpu, kvm_err("Failed to map in G-stage\n"); out_unlock: + if ((!ret || ret == -EEXIST) && writable) + kvm_set_pfn_dirty(hfn); + spin_unlock(&kvm->mmu_lock); kvm_set_pfn_accessed(hfn); kvm_release_pfn_clean(hfn);