From patchwork Thu Nov 4 00:25:11 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Sean Christopherson X-Patchwork-Id: 12602175 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 mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id A3B81C433EF for ; Thu, 4 Nov 2021 00:35:05 +0000 (UTC) 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 mail.kernel.org (Postfix) with ESMTPS id 6561A611C3 for ; Thu, 4 Nov 2021 00:35:05 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.1 mail.kernel.org 6561A611C3 Authentication-Results: mail.kernel.org; dmarc=fail (p=reject dis=none) header.from=google.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=lists.infradead.org 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:References :Mime-Version:Message-Id:In-Reply-To:Date:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=EIZ6uhovYtc0zxN07OycNKXbRrCXgDjA9bhel2ZTT3w=; b=Y00HeZe7I7ZQTJ ZjhVdqrnkSP8PdaGXIoA+MTpLanb0iUbd8Ny0WHkNf4dd6hmxXonqrhkrH4VpFmqdOIHEzRMSldJ4 sjnuB7W0207NqVp6zN4xWszqkQeyyeMyuPYODA/uxzA19/9IdeoH0uBotuGngrS4Pf2nO3J142VJ1 Pkk/iMHzjOrDp+jjElt8Fee5yn4u3IeoFGgRyg9+npZEGCw9yplZMzq+ZT2et6CZ0rhpmobMdvJDd X/K7TMejEEeTlLZlnivxwaosMRFcP8WWeV4RW47QLHTtYyMRZ3EIA7YkxzvvvqudYF0ML2J3hQplS an04QAG5+dTlJw+7fj1Q==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1miQgi-007GEm-VF; Thu, 04 Nov 2021 00:33:06 +0000 Received: from mail-pl1-x649.google.com ([2607:f8b0:4864:20::649]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1miQa8-007CfD-Vh for linux-arm-kernel@lists.infradead.org; Thu, 04 Nov 2021 00:26:19 +0000 Received: by mail-pl1-x649.google.com with SMTP id w4-20020a1709029a8400b00138e222b06aso1928777plp.12 for ; Wed, 03 Nov 2021 17:26:15 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20210112; h=reply-to:date:in-reply-to:message-id:mime-version:references :subject:from:to:cc; bh=PjovHHKwir4eMxna9ALNlFgtKtfStcoQnuN5jUx4d74=; b=MzRIGZ00uU1v6jXFg7sOa49q0QiiJzIeJF0fsnZltmvZzCFhconYRc7Mql7/SxLGGe PQR/3RHhBtRSAtrokWdTMRIYSNfCjrzeqp/2pYl4nuIUdLA+tNXzlJj4UmkkkIK9LPqV 7p7wAQ5d9Kyg2fkqIEMVil6Qgqe36g5ifelvyOMR/AYAS8U+ERKkQK+cGyQQZ8x89Oqo pR44zTX8U0CmR165/PWPO3esK4NT4i+1siE3vZY8sMARYj2xTKpTBhSVsLlYNqaeTVf1 xDjmvGuKQEAXKpLgA0+7lW1H38uqGwX51Von2AgvBjNF1O3E3ZNcRPe20jLwzon1Y1yB H4FQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:reply-to:date:in-reply-to:message-id :mime-version:references:subject:from:to:cc; bh=PjovHHKwir4eMxna9ALNlFgtKtfStcoQnuN5jUx4d74=; b=2iYESJUaYvNVkWxdShKav8HTK10mbfjFo20csIdwcfrUD4oyJB41G0SpzLiT9AcOgo oljHaNHSfRL7jL+C3ePXE+9UJw3IICXw2URsvuNNgIAb5EsZa/Fcbus3KFoMWcn7ns5p hCH5hnLHC0h8Ibum2AWNccUO7FDkTKc1u4fB2EDcHFtpuHqCxzfhrIr0zyv1dbTNfe3h Zw7XaYU7osdbzN93Wll1Ct5ZUtm754Js1++CFH8WEbRcceQvuOvX30FY6mq3NlosOzFa e60yEM0/eSEoygSLSzoplXReN+6+awiUJwjcN3DrzHQWu9OlTlbEw8OxJwItAKi44Nf2 zkYQ== X-Gm-Message-State: AOAM531W/U08SmzcUamyOR9kZhGo6QjQUGsHnxBljjdKgnsUk4YzygfR 6uSJ+s98hV5eyVIg6v1ODQJ+d04tEXM= X-Google-Smtp-Source: ABdhPJzQ7YmaVSHBOjM7K350dhFQvaiNwSHal69feIXmb76g43+5TJfukiKupDeHK6Cfhk2S1QB6BJZI8TM= X-Received: from seanjc.c.googlers.com ([fda3:e722:ac3:cc00:7f:e700:c0a8:3e5]) (user=seanjc job=sendgmr) by 2002:a17:90b:1643:: with SMTP id il3mr11048014pjb.182.1635985575294; Wed, 03 Nov 2021 17:26:15 -0700 (PDT) Date: Thu, 4 Nov 2021 00:25:11 +0000 In-Reply-To: <20211104002531.1176691-1-seanjc@google.com> Message-Id: <20211104002531.1176691-11-seanjc@google.com> Mime-Version: 1.0 References: <20211104002531.1176691-1-seanjc@google.com> X-Mailer: git-send-email 2.33.1.1089.g2158813163f-goog Subject: [PATCH v5.5 10/30] KVM: PPC: Avoid referencing userspace memory region in memslot updates From: Sean Christopherson To: Marc Zyngier , Huacai Chen , Aleksandar Markovic , Paul Mackerras , Anup Patel , Paul Walmsley , Palmer Dabbelt , Albert Ou , Christian Borntraeger , Janosch Frank , Paolo Bonzini Cc: James Morse , Alexandru Elisei , Suzuki K Poulose , Atish Patra , David Hildenbrand , Cornelia Huck , Claudio Imbrenda , Sean Christopherson , Vitaly Kuznetsov , Wanpeng Li , Jim Mattson , Joerg Roedel , linux-arm-kernel@lists.infradead.org, kvmarm@lists.cs.columbia.edu, linux-mips@vger.kernel.org, kvm@vger.kernel.org, kvm-ppc@vger.kernel.org, kvm-riscv@lists.infradead.org, linux-riscv@lists.infradead.org, linux-kernel@vger.kernel.org, Ben Gardon , "Maciej S . Szmigiero" X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20211103_172617_091225_E9FD4CAA X-CRM114-Status: GOOD ( 16.27 ) 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 For PPC HV, get the number of pages directly from the new memslot instead of computing the same from the userspace memory region, and explicitly check for !DELETE instead of inferring the same when toggling mmio_update. The motivation for these changes is to avoid referencing the @mem param so that it can be dropped in a future commit. No functional change intended. Signed-off-by: Sean Christopherson --- arch/powerpc/include/asm/kvm_ppc.h | 4 ---- arch/powerpc/kvm/book3s.c | 6 ++---- arch/powerpc/kvm/book3s_hv.c | 12 +++--------- arch/powerpc/kvm/book3s_pr.c | 2 -- arch/powerpc/kvm/booke.c | 2 -- arch/powerpc/kvm/powerpc.c | 4 ++-- 6 files changed, 7 insertions(+), 23 deletions(-) diff --git a/arch/powerpc/include/asm/kvm_ppc.h b/arch/powerpc/include/asm/kvm_ppc.h index b01760dd1374..935c58dc38c4 100644 --- a/arch/powerpc/include/asm/kvm_ppc.h +++ b/arch/powerpc/include/asm/kvm_ppc.h @@ -200,12 +200,10 @@ extern void kvmppc_core_destroy_vm(struct kvm *kvm); extern void kvmppc_core_free_memslot(struct kvm *kvm, struct kvm_memory_slot *slot); extern int kvmppc_core_prepare_memory_region(struct kvm *kvm, - const struct kvm_userspace_memory_region *mem, const struct kvm_memory_slot *old, struct kvm_memory_slot *new, enum kvm_mr_change change); extern void kvmppc_core_commit_memory_region(struct kvm *kvm, - const struct kvm_userspace_memory_region *mem, struct kvm_memory_slot *old, const struct kvm_memory_slot *new, enum kvm_mr_change change); @@ -275,12 +273,10 @@ struct kvmppc_ops { int (*get_dirty_log)(struct kvm *kvm, struct kvm_dirty_log *log); void (*flush_memslot)(struct kvm *kvm, struct kvm_memory_slot *memslot); int (*prepare_memory_region)(struct kvm *kvm, - const struct kvm_userspace_memory_region *mem, const struct kvm_memory_slot *old, struct kvm_memory_slot *new, enum kvm_mr_change change); void (*commit_memory_region)(struct kvm *kvm, - const struct kvm_userspace_memory_region *mem, struct kvm_memory_slot *old, const struct kvm_memory_slot *new, enum kvm_mr_change change); diff --git a/arch/powerpc/kvm/book3s.c b/arch/powerpc/kvm/book3s.c index 8250e8308674..6d525285dbe8 100644 --- a/arch/powerpc/kvm/book3s.c +++ b/arch/powerpc/kvm/book3s.c @@ -847,21 +847,19 @@ void kvmppc_core_flush_memslot(struct kvm *kvm, struct kvm_memory_slot *memslot) } int kvmppc_core_prepare_memory_region(struct kvm *kvm, - const struct kvm_userspace_memory_region *mem, const struct kvm_memory_slot *old, struct kvm_memory_slot *new, enum kvm_mr_change change) { - return kvm->arch.kvm_ops->prepare_memory_region(kvm, mem, old, new, change); + return kvm->arch.kvm_ops->prepare_memory_region(kvm, old, new, change); } void kvmppc_core_commit_memory_region(struct kvm *kvm, - const struct kvm_userspace_memory_region *mem, struct kvm_memory_slot *old, const struct kvm_memory_slot *new, enum kvm_mr_change change) { - kvm->arch.kvm_ops->commit_memory_region(kvm, mem, old, new, change); + kvm->arch.kvm_ops->commit_memory_region(kvm, old, new, change); } bool kvm_unmap_gfn_range(struct kvm *kvm, struct kvm_gfn_range *range) diff --git a/arch/powerpc/kvm/book3s_hv.c b/arch/powerpc/kvm/book3s_hv.c index 5bf763a74c22..4d40c1867be5 100644 --- a/arch/powerpc/kvm/book3s_hv.c +++ b/arch/powerpc/kvm/book3s_hv.c @@ -4828,15 +4828,12 @@ static void kvmppc_core_free_memslot_hv(struct kvm_memory_slot *slot) } static int kvmppc_core_prepare_memory_region_hv(struct kvm *kvm, - const struct kvm_userspace_memory_region *mem, const struct kvm_memory_slot *old, struct kvm_memory_slot *new, enum kvm_mr_change change) { - unsigned long npages = mem->memory_size >> PAGE_SHIFT; - if (change == KVM_MR_CREATE) { - new->arch.rmap = vzalloc(array_size(npages, + new->arch.rmap = vzalloc(array_size(new->npages, sizeof(*new->arch.rmap))); if (!new->arch.rmap) return -ENOMEM; @@ -4848,20 +4845,17 @@ static int kvmppc_core_prepare_memory_region_hv(struct kvm *kvm, } static void kvmppc_core_commit_memory_region_hv(struct kvm *kvm, - const struct kvm_userspace_memory_region *mem, struct kvm_memory_slot *old, const struct kvm_memory_slot *new, enum kvm_mr_change change) { - unsigned long npages = mem->memory_size >> PAGE_SHIFT; - /* - * If we are making a new memslot, it might make + * If we are creating or modifying a memslot, it might make * some address that was previously cached as emulated * MMIO be no longer emulated MMIO, so invalidate * all the caches of emulated MMIO translations. */ - if (npages) + if (change != KVM_MR_DELETE) atomic64_inc(&kvm->arch.mmio_update); /* diff --git a/arch/powerpc/kvm/book3s_pr.c b/arch/powerpc/kvm/book3s_pr.c index 58d3ae4605c0..ca3bfba94fe4 100644 --- a/arch/powerpc/kvm/book3s_pr.c +++ b/arch/powerpc/kvm/book3s_pr.c @@ -1899,7 +1899,6 @@ static void kvmppc_core_flush_memslot_pr(struct kvm *kvm, } static int kvmppc_core_prepare_memory_region_pr(struct kvm *kvm, - const struct kvm_userspace_memory_region *mem, const struct kvm_memory_slot *old, struct kvm_memory_slot *new, enum kvm_mr_change change) @@ -1908,7 +1907,6 @@ static int kvmppc_core_prepare_memory_region_pr(struct kvm *kvm, } static void kvmppc_core_commit_memory_region_pr(struct kvm *kvm, - const struct kvm_userspace_memory_region *mem, struct kvm_memory_slot *old, const struct kvm_memory_slot *new, enum kvm_mr_change change) diff --git a/arch/powerpc/kvm/booke.c b/arch/powerpc/kvm/booke.c index fcf9c1dbd442..25dcf079c713 100644 --- a/arch/powerpc/kvm/booke.c +++ b/arch/powerpc/kvm/booke.c @@ -1807,7 +1807,6 @@ void kvmppc_core_free_memslot(struct kvm *kvm, struct kvm_memory_slot *slot) } int kvmppc_core_prepare_memory_region(struct kvm *kvm, - const struct kvm_userspace_memory_region *mem, const struct kvm_memory_slot *old, struct kvm_memory_slot *new, enum kvm_mr_change change) @@ -1816,7 +1815,6 @@ int kvmppc_core_prepare_memory_region(struct kvm *kvm, } void kvmppc_core_commit_memory_region(struct kvm *kvm, - const struct kvm_userspace_memory_region *mem, struct kvm_memory_slot *old, const struct kvm_memory_slot *new, enum kvm_mr_change change) diff --git a/arch/powerpc/kvm/powerpc.c b/arch/powerpc/kvm/powerpc.c index ca28e7acaae8..59342237e046 100644 --- a/arch/powerpc/kvm/powerpc.c +++ b/arch/powerpc/kvm/powerpc.c @@ -711,7 +711,7 @@ int kvm_arch_prepare_memory_region(struct kvm *kvm, struct kvm_memory_slot *new, enum kvm_mr_change change) { - return kvmppc_core_prepare_memory_region(kvm, mem, old, new, change); + return kvmppc_core_prepare_memory_region(kvm, old, new, change); } void kvm_arch_commit_memory_region(struct kvm *kvm, @@ -720,7 +720,7 @@ void kvm_arch_commit_memory_region(struct kvm *kvm, const struct kvm_memory_slot *new, enum kvm_mr_change change) { - kvmppc_core_commit_memory_region(kvm, mem, old, new, change); + kvmppc_core_commit_memory_region(kvm, old, new, change); } void kvm_arch_flush_shadow_memslot(struct kvm *kvm,