From patchwork Tue Jul 18 23:44:45 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Sean Christopherson X-Patchwork-Id: 13317843 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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 9E767EB64DC for ; Tue, 18 Jul 2023 23:48:58 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230180AbjGRXs4 (ORCPT ); Tue, 18 Jul 2023 19:48:56 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:48324 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230086AbjGRXsh (ORCPT ); Tue, 18 Jul 2023 19:48:37 -0400 Received: from mail-yw1-x1149.google.com (mail-yw1-x1149.google.com [IPv6:2607:f8b0:4864:20::1149]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id B4863F7 for ; Tue, 18 Jul 2023 16:48:35 -0700 (PDT) Received: by mail-yw1-x1149.google.com with SMTP id 00721157ae682-5704e551e8bso58171727b3.3 for ; Tue, 18 Jul 2023 16:48:35 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20221208; t=1689724115; x=1692316115; 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=/Q2YqUewU0QJU59tCBKplqkoUGv4ucil0ZC6wcpHcqQ=; b=tLDg009LSV9Tr1yXeY8d4SfO26PrwJIaLtLynftl5yKXvNFsST0X3aD0RRd4GHX/wv vtU1d3HuUEp4/WvsYO14a7YtyRpqHdAIKX5GRwFujpPChgWaWrOtfOGhpxiDxfb2FIcp Ae9zBTxW6KL3hmvrpUDBJiNqXIyNkauGtse5upwrlxh/E50i4d2vGBX75qEPajnBgZGc 62JFVrZFAM+EhDxD7kWVSnkyBrTTVuPq5qxvIJYKXmn+OcNdrNUgMZjrQKHRGqfkHsON U3BqIvW3OKP/jQkfPxwptTqtHQZYGlpqMzy7K9mx0E1p+mdrooSa+nj413aqHz+roVeF gxuw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1689724115; x=1692316115; 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=/Q2YqUewU0QJU59tCBKplqkoUGv4ucil0ZC6wcpHcqQ=; b=OWoK/S/mhBMqVZA2BhaKq5mqcv4htItLGYVNx1o5smiBD+KweNQwjmHL5cJBKltvKU rrCOLor6fWwKAcUgJAdHI/Iue6PmSyh73+fnAD0KgUZ39tM40wbjEvEYaeP6lNfAvFX5 723FUAG0m+RMeKY8pNorlgKhvVB1P1oCOBs5ueo8CME0t1IRrGW9wKLRDnM+oUsK9St2 aSunCe2QRtJcO+dAg5eyM0rqSuHo9syp2IQEJf62P4sX1DshJw8ADVEHIxjv+0MGnYHR XN6w0M1PLCHQBHLtT2v/CkbuLLVX2uk4xUFGV95iH5IaGCaIVdO0MZo2ZPHZGqYX8G57 eVMQ== X-Gm-Message-State: ABy/qLY+mAXVP8i/fHv7mcnkIs8awG1piu7hcA6V76Zv1ksoFexpcCXW 8vtPYkuNbqH3nObnJCKQHeLDNHQj9e4= X-Google-Smtp-Source: APBJJlHjosfFmr47fAQ4FwoHYiy0rQprOrE8ng/AJ+BqBK9Dg+T53fJUISRxGIkaIZYnyupUcGSciTRGnxE= X-Received: from zagreus.c.googlers.com ([fda3:e722:ac3:cc00:7f:e700:c0a8:5c37]) (user=seanjc job=sendgmr) by 2002:a81:b61d:0:b0:57a:141f:b4f7 with SMTP id u29-20020a81b61d000000b0057a141fb4f7mr40058ywh.6.1689724115002; Tue, 18 Jul 2023 16:48:35 -0700 (PDT) Reply-To: Sean Christopherson Date: Tue, 18 Jul 2023 16:44:45 -0700 In-Reply-To: <20230718234512.1690985-1-seanjc@google.com> Mime-Version: 1.0 References: <20230718234512.1690985-1-seanjc@google.com> X-Mailer: git-send-email 2.41.0.255.g8b1d071c50-goog Message-ID: <20230718234512.1690985-3-seanjc@google.com> Subject: [RFC PATCH v11 02/29] KVM: Tweak kvm_hva_range and hva_handler_t to allow reusing for gfn ranges From: Sean Christopherson To: Paolo Bonzini , Marc Zyngier , Oliver Upton , Huacai Chen , Michael Ellerman , Anup Patel , Paul Walmsley , Palmer Dabbelt , Albert Ou , Sean Christopherson , "Matthew Wilcox (Oracle)" , Andrew Morton , Paul Moore , James Morris , "Serge E. Hallyn" Cc: kvm@vger.kernel.org, linux-arm-kernel@lists.infradead.org, kvmarm@lists.linux.dev, linux-mips@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, kvm-riscv@lists.infradead.org, linux-riscv@lists.infradead.org, linux-fsdevel@vger.kernel.org, linux-mm@kvack.org, linux-security-module@vger.kernel.org, linux-kernel@vger.kernel.org, Chao Peng , Fuad Tabba , Jarkko Sakkinen , Yu Zhang , Vishal Annapurve , Ackerley Tng , Maciej Szmigiero , Vlastimil Babka , David Hildenbrand , Quentin Perret , Michael Roth , Wang , Liam Merwick , Isaku Yamahata , "Kirill A . Shutemov" Precedence: bulk List-ID: X-Mailing-List: linux-fsdevel@vger.kernel.org Signed-off-by: Sean Christopherson Reviewed-by: Paolo Bonzini --- virt/kvm/kvm_main.c | 34 +++++++++++++++++++--------------- 1 file changed, 19 insertions(+), 15 deletions(-) diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c index d58b7a506d27..50aea855eeae 100644 --- a/virt/kvm/kvm_main.c +++ b/virt/kvm/kvm_main.c @@ -516,21 +516,25 @@ static inline struct kvm *mmu_notifier_to_kvm(struct mmu_notifier *mn) return container_of(mn, struct kvm, mmu_notifier); } -typedef bool (*hva_handler_t)(struct kvm *kvm, struct kvm_gfn_range *range); +typedef bool (*gfn_handler_t)(struct kvm *kvm, struct kvm_gfn_range *range); typedef void (*on_lock_fn_t)(struct kvm *kvm, unsigned long start, unsigned long end); typedef void (*on_unlock_fn_t)(struct kvm *kvm); -struct kvm_hva_range { - unsigned long start; - unsigned long end; +struct kvm_mmu_notifier_range { + /* + * 64-bit addresses, as KVM notifiers can operate on host virtual + * addresses (unsigned long) and guest physical addresses (64-bit). + */ + u64 start; + u64 end; union { pte_t pte; u64 raw; } arg; - hva_handler_t handler; + gfn_handler_t handler; on_lock_fn_t on_lock; on_unlock_fn_t on_unlock; bool flush_on_ret; @@ -557,7 +561,7 @@ static void kvm_null_fn(void) node = interval_tree_iter_next(node, start, last)) \ static __always_inline int __kvm_handle_hva_range(struct kvm *kvm, - const struct kvm_hva_range *range) + const struct kvm_mmu_notifier_range *range) { bool ret = false, locked = false; struct kvm_gfn_range gfn_range; @@ -588,9 +592,9 @@ static __always_inline int __kvm_handle_hva_range(struct kvm *kvm, unsigned long hva_start, hva_end; slot = container_of(node, struct kvm_memory_slot, hva_node[slots->node_idx]); - hva_start = max(range->start, slot->userspace_addr); - hva_end = min(range->end, slot->userspace_addr + - (slot->npages << PAGE_SHIFT)); + hva_start = max_t(unsigned long, range->start, slot->userspace_addr); + hva_end = min_t(unsigned long, range->end, + slot->userspace_addr + (slot->npages << PAGE_SHIFT)); /* * To optimize for the likely case where the address @@ -640,10 +644,10 @@ static __always_inline int kvm_handle_hva_range(struct mmu_notifier *mn, unsigned long start, unsigned long end, pte_t pte, - hva_handler_t handler) + gfn_handler_t handler) { struct kvm *kvm = mmu_notifier_to_kvm(mn); - const struct kvm_hva_range range = { + const struct kvm_mmu_notifier_range range = { .start = start, .end = end, .arg.pte = pte, @@ -660,10 +664,10 @@ static __always_inline int kvm_handle_hva_range(struct mmu_notifier *mn, static __always_inline int kvm_handle_hva_range_no_flush(struct mmu_notifier *mn, unsigned long start, unsigned long end, - hva_handler_t handler) + gfn_handler_t handler) { struct kvm *kvm = mmu_notifier_to_kvm(mn); - const struct kvm_hva_range range = { + const struct kvm_mmu_notifier_range range = { .start = start, .end = end, .handler = handler, @@ -750,7 +754,7 @@ static int kvm_mmu_notifier_invalidate_range_start(struct mmu_notifier *mn, const struct mmu_notifier_range *range) { struct kvm *kvm = mmu_notifier_to_kvm(mn); - const struct kvm_hva_range hva_range = { + const struct kvm_mmu_notifier_range hva_range = { .start = range->start, .end = range->end, .handler = kvm_unmap_gfn_range, @@ -814,7 +818,7 @@ static void kvm_mmu_notifier_invalidate_range_end(struct mmu_notifier *mn, const struct mmu_notifier_range *range) { struct kvm *kvm = mmu_notifier_to_kvm(mn); - const struct kvm_hva_range hva_range = { + const struct kvm_mmu_notifier_range hva_range = { .start = range->start, .end = range->end, .handler = (void *)kvm_null_fn,