From patchwork Fri Nov 19 13:47:34 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Chao Peng X-Patchwork-Id: 12628911 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 8B412C433EF for ; Fri, 19 Nov 2021 13:49:46 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 7745761247 for ; Fri, 19 Nov 2021 13:49:46 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235749AbhKSNwn (ORCPT ); Fri, 19 Nov 2021 08:52:43 -0500 Received: from mga03.intel.com ([134.134.136.65]:10229 "EHLO mga03.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S235664AbhKSNwm (ORCPT ); Fri, 19 Nov 2021 08:52:42 -0500 X-IronPort-AV: E=McAfee;i="6200,9189,10172"; a="234362231" X-IronPort-AV: E=Sophos;i="5.87,247,1631602800"; d="scan'208";a="234362231" Received: from orsmga008.jf.intel.com ([10.7.209.65]) by orsmga103.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 19 Nov 2021 05:49:40 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.87,247,1631602800"; d="scan'208";a="507905069" Received: from chaop.bj.intel.com ([10.240.192.101]) by orsmga008.jf.intel.com with ESMTP; 19 Nov 2021 05:49:32 -0800 From: Chao Peng To: kvm@vger.kernel.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, linux-fsdevel@vger.kernel.org, qemu-devel@nongnu.org Cc: Paolo Bonzini , Jonathan Corbet , Sean Christopherson , Vitaly Kuznetsov , Wanpeng Li , Jim Mattson , Joerg Roedel , Thomas Gleixner , Ingo Molnar , Borislav Petkov , x86@kernel.org, "H . Peter Anvin" , Hugh Dickins , Jeff Layton , "J . Bruce Fields" , Andrew Morton , Yu Zhang , Chao Peng , "Kirill A . Shutemov" , luto@kernel.org, john.ji@intel.com, susie.li@intel.com, jun.nakajima@intel.com, dave.hansen@intel.com, ak@linux.intel.com, david@redhat.com Subject: [RFC v2 PATCH 08/13] KVM: Rename hva memory invalidation code to cover fd-based offset Date: Fri, 19 Nov 2021 21:47:34 +0800 Message-Id: <20211119134739.20218-9-chao.p.peng@linux.intel.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20211119134739.20218-1-chao.p.peng@linux.intel.com> References: <20211119134739.20218-1-chao.p.peng@linux.intel.com> Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org The poupose is for fd-based memslot reusing the same code for memory invalidation. The code can be reused except changing 'hva' to more neutral naming 'useraddr'. Signed-off-by: Yu Zhang Signed-off-by: Chao Peng --- include/linux/kvm_host.h | 4 ++-- virt/kvm/kvm_main.c | 44 ++++++++++++++++++++-------------------- 2 files changed, 24 insertions(+), 24 deletions(-) diff --git a/include/linux/kvm_host.h b/include/linux/kvm_host.h index e8646103356b..925c4d9f0a31 100644 --- a/include/linux/kvm_host.h +++ b/include/linux/kvm_host.h @@ -1340,9 +1340,9 @@ static inline bool memslot_has_private(const struct kvm_memory_slot *slot) } static inline gfn_t -hva_to_gfn_memslot(unsigned long hva, struct kvm_memory_slot *slot) +useraddr_to_gfn_memslot(unsigned long useraddr, struct kvm_memory_slot *slot) { - gfn_t gfn_offset = (hva - slot->userspace_addr) >> PAGE_SHIFT; + gfn_t gfn_offset = (useraddr - slot->userspace_addr) >> PAGE_SHIFT; return slot->base_gfn + gfn_offset; } diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c index b8673490d301..d9a6890dd18a 100644 --- a/virt/kvm/kvm_main.c +++ b/virt/kvm/kvm_main.c @@ -471,16 +471,16 @@ static void kvm_mmu_notifier_invalidate_range(struct mmu_notifier *mn, srcu_read_unlock(&kvm->srcu, idx); } -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); -struct kvm_hva_range { +struct kvm_useraddr_range { unsigned long start; unsigned long end; pte_t pte; - hva_handler_t handler; + gfn_handler_t handler; on_lock_fn_t on_lock; bool flush_on_ret; bool may_block; @@ -499,8 +499,8 @@ static void kvm_null_fn(void) } #define IS_KVM_NULL_FN(fn) ((fn) == (void *)kvm_null_fn) -static __always_inline int __kvm_handle_hva_range(struct kvm *kvm, - const struct kvm_hva_range *range) +static __always_inline int __kvm_handle_useraddr_range(struct kvm *kvm, + const struct kvm_useraddr_range *range) { bool ret = false, locked = false; struct kvm_gfn_range gfn_range; @@ -518,12 +518,12 @@ static __always_inline int __kvm_handle_hva_range(struct kvm *kvm, for (i = 0; i < KVM_ADDRESS_SPACE_NUM; i++) { slots = __kvm_memslots(kvm, i); kvm_for_each_memslot(slot, slots) { - unsigned long hva_start, hva_end; + unsigned long useraddr_start, useraddr_end; - hva_start = max(range->start, slot->userspace_addr); - hva_end = min(range->end, slot->userspace_addr + + useraddr_start = max(range->start, slot->userspace_addr); + useraddr_end = min(range->end, slot->userspace_addr + (slot->npages << PAGE_SHIFT)); - if (hva_start >= hva_end) + if (useraddr_start >= useraddr_end) continue; /* @@ -536,11 +536,11 @@ static __always_inline int __kvm_handle_hva_range(struct kvm *kvm, gfn_range.may_block = range->may_block; /* - * {gfn(page) | page intersects with [hva_start, hva_end)} = + * {gfn(page) | page intersects with [useraddr_start, useraddr_end)} = * {gfn_start, gfn_start+1, ..., gfn_end-1}. */ - gfn_range.start = hva_to_gfn_memslot(hva_start, slot); - gfn_range.end = hva_to_gfn_memslot(hva_end + PAGE_SIZE - 1, slot); + gfn_range.start = useraddr_to_gfn_memslot(useraddr_start, slot); + gfn_range.end = useraddr_to_gfn_memslot(useraddr_end + PAGE_SIZE - 1, slot); gfn_range.slot = slot; if (!locked) { @@ -571,10 +571,10 @@ 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_useraddr_range range = { .start = start, .end = end, .pte = pte, @@ -584,16 +584,16 @@ static __always_inline int kvm_handle_hva_range(struct mmu_notifier *mn, .may_block = false, }; - return __kvm_handle_hva_range(kvm, &range); + return __kvm_handle_useraddr_range(kvm, &range); } 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_useraddr_range range = { .start = start, .end = end, .pte = __pte(0), @@ -603,7 +603,7 @@ static __always_inline int kvm_handle_hva_range_no_flush(struct mmu_notifier *mn .may_block = false, }; - return __kvm_handle_hva_range(kvm, &range); + return __kvm_handle_useraddr_range(kvm, &range); } static void kvm_mmu_notifier_change_pte(struct mmu_notifier *mn, struct mm_struct *mm, @@ -661,7 +661,7 @@ 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_useraddr_range useraddr_range = { .start = range->start, .end = range->end, .pte = __pte(0), @@ -685,7 +685,7 @@ static int kvm_mmu_notifier_invalidate_range_start(struct mmu_notifier *mn, kvm->mn_active_invalidate_count++; spin_unlock(&kvm->mn_invalidate_lock); - __kvm_handle_hva_range(kvm, &hva_range); + __kvm_handle_useraddr_range(kvm, &useraddr_range); return 0; } @@ -712,7 +712,7 @@ 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_useraddr_range useraddr_range = { .start = range->start, .end = range->end, .pte = __pte(0), @@ -723,7 +723,7 @@ static void kvm_mmu_notifier_invalidate_range_end(struct mmu_notifier *mn, }; bool wake; - __kvm_handle_hva_range(kvm, &hva_range); + __kvm_handle_useraddr_range(kvm, &useraddr_range); /* Pairs with the increment in range_start(). */ spin_lock(&kvm->mn_invalidate_lock);