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: 1550663 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: bilbo.ozlabs.org; dkim=pass (2048-bit key; unprotected) header.d=google.com header.i=@google.com header.a=rsa-sha256 header.s=20210112 header.b=MzRIGZ00; dkim-atps=neutral Authentication-Results: ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=vger.kernel.org (client-ip=23.128.96.18; helo=vger.kernel.org; envelope-from=kvm-ppc-owner@vger.kernel.org; receiver=) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by bilbo.ozlabs.org (Postfix) with ESMTP id 4Hl4GP5VPQz9sPf for ; Thu, 4 Nov 2021 11:27:25 +1100 (AEDT) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233117AbhKDA36 (ORCPT ); Wed, 3 Nov 2021 20:29:58 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:52614 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233255AbhKDA2w (ORCPT ); Wed, 3 Nov 2021 20:28:52 -0400 Received: from mail-pf1-x449.google.com (mail-pf1-x449.google.com [IPv6:2607:f8b0:4864:20::449]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id D7FF9C061205 for ; Wed, 3 Nov 2021 17:26:15 -0700 (PDT) Received: by mail-pf1-x449.google.com with SMTP id l7-20020a622507000000b00494608c84a4so262728pfl.6 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=GFNHbXVl+xuTGEsKSDaAGa72uXSIC3Xf1roNp1LjwSIEvp+XkdYHI+jz/cVVnR6bRt F4+0IgS/mruOckjL70r52piPzc89CdBQs8J6M48Kq8E7VOpuSFH2wbrwFNH7IqRRDoKy a/PUKgvJInFcvD00VeSfoeBOKRJiib9xhsVWEPl4bXkSBKayieCarfesjvJajqDokBlr T0joGo218UrUMOHLvRfR/k6absaut3K2aCZKkW05TYz4Azryn+50mW2/lN0AkJl5HKiQ qFODbhDW4VZ/VvURM7wuP1rNO6ZMKnpGtwWAF11b9/JFmUJPP2LQ3E9FCn+gdG0Dhq7x Qleg== X-Gm-Message-State: AOAM5334uN5EFt/QpHOi4uPzA6hKTAbVd1uYqw5B3Vw2z/bjOttpJo68 EIfdscFJYOFkWToqe4Ay3R7ppxkFPdM= 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) Reply-To: Sean Christopherson 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" Precedence: bulk List-ID: X-Mailing-List: kvm-ppc@vger.kernel.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,