From patchwork Fri Jun 2 16:09:13 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Vipin Sharma X-Patchwork-Id: 13265592 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 D6A05C7EE2A for ; Fri, 2 Jun 2023 16:11:11 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S236740AbjFBQLK (ORCPT ); Fri, 2 Jun 2023 12:11:10 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:36482 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S236410AbjFBQK4 (ORCPT ); Fri, 2 Jun 2023 12:10:56 -0400 Received: from mail-yb1-xb4a.google.com (mail-yb1-xb4a.google.com [IPv6:2607:f8b0:4864:20::b4a]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 1278810DD for ; Fri, 2 Jun 2023 09:10:09 -0700 (PDT) Received: by mail-yb1-xb4a.google.com with SMTP id 3f1490d57ef6-babb51cb4d4so2949181276.1 for ; Fri, 02 Jun 2023 09:10:09 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20221208; t=1685722190; x=1688314190; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:from:to:cc:subject:date:message-id:reply-to; bh=Hryh0ZWAFdBP/1ensclnMWOs6DFcoKq9t8dEIwwzMjM=; b=yFcSJ5sk1YiYcQktVHUrIraA4vq3gzBg01wawQ+99X99BcERdv6aw79BJglFIsX38X Jmk2e5UaolCr5t1qAVgv5xhRcuwqz8qsPeKTN4dMinvHjEGhpXtPGawN2ICvlDQZGj8D ZmOScsl1sdyn4gxehMyRauugNpIrQjpu1KxL67VdJydhpwrAe8TXpUojYixIDTXpkYLZ L/KcS63c1WkLy8I19gAWFgXf90HgC8c3L1xN5Hze37jt9RE4scxALJ3lb9KGpgKF7m+y IPNOsGvdWwTPZEtqpxeUuo6lpLAcPxZcX9jQeWMRNApjKkg5jyviIXgCTWMDwLFLuVTH Fsfg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1685722190; x=1688314190; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=Hryh0ZWAFdBP/1ensclnMWOs6DFcoKq9t8dEIwwzMjM=; b=bT7tdmLsTGmLhuqOGHoJcmLFO1ZJsjLm2dYIDy8bOv5IbJAkzv9WcLKhBRF/gQYRdW drHkc3l48S/H6AJvttCLHLag6F5UV97pcA94Kumh0xALKrcvSdb56u3Kg4I1zS2xIsBn 4OY8MqJL/Ckxdr1fIYxWSOFNz5X7XchzV1yFK7O/h2nK4q+FLj5A6sAwM4J8WmsOE7eb VfJUj3WhRTcwos/p5WZgMdoGdInusOnBGPCcp8/IvUZZ5ZJZHLVlAG2ciIHiKwBzEAqn 2dgeWOgYAeT893SypWJhL717keg2+f7AEXmKnTOZztM70mDSZHiXKhD4rm5qq2AzHJr5 lIRg== X-Gm-Message-State: AC+VfDygDyH26HgQkCPOmkufSrKye/WNeDXZmjHESZcl2HebA8EKSStB Vo4AQkzbMGdTdRwdchrQrE5K4uYvE7DD X-Google-Smtp-Source: ACHHUZ5M9AG9HKhKFMo8prXUgGc/ucGnPOZDLd1OSRiqHslc40DT/QGSesfErKBawc3k99MHt4wj3TuQ4IOn X-Received: from vipin.c.googlers.com ([fda3:e722:ac3:cc00:7f:e700:c0a8:479f]) (user=vipinsh job=sendgmr) by 2002:a25:bc7:0:b0:ba8:cbd2:61b3 with SMTP id 190-20020a250bc7000000b00ba8cbd261b3mr1223005ybl.5.1685722190144; Fri, 02 Jun 2023 09:09:50 -0700 (PDT) Date: Fri, 2 Jun 2023 09:09:13 -0700 In-Reply-To: <20230602160914.4011728-1-vipinsh@google.com> Mime-Version: 1.0 References: <20230602160914.4011728-1-vipinsh@google.com> X-Mailer: git-send-email 2.41.0.rc0.172.g3f132b7071-goog Message-ID: <20230602160914.4011728-16-vipinsh@google.com> Subject: [PATCH v2 15/16] KVM: arm64: Provide option to pass page walker flag for huge page splits From: Vipin Sharma To: maz@kernel.org, oliver.upton@linux.dev, james.morse@arm.com, suzuki.poulose@arm.com, yuzenghui@huawei.com, catalin.marinas@arm.com, will@kernel.org, chenhuacai@kernel.org, aleksandar.qemu.devel@gmail.com, tsbogend@alpha.franken.de, anup@brainfault.org, atishp@atishpatra.org, paul.walmsley@sifive.com, palmer@dabbelt.com, aou@eecs.berkeley.edu, seanjc@google.com, pbonzini@redhat.com, dmatlack@google.com, ricarkol@google.com Cc: linux-arm-kernel@lists.infradead.org, kvmarm@lists.linux.dev, linux-mips@vger.kernel.org, kvm-riscv@lists.infradead.org, linux-riscv@lists.infradead.org, linux-kselftest@vger.kernel.org, kvm@vger.kernel.org, linux-kernel@vger.kernel.org, Vipin Sharma Precedence: bulk List-ID: X-Mailing-List: linux-kselftest@vger.kernel.org Pass enum kvm_pgtable_walk_flags{} to kvm_mmu_split_huge_pages(). Use 0 as the flag value to make it no-op. In future commit kvm_mmu_split_huge_pages() will be used under both MMU read lock and MMU write lock. Flag allows to pass intent to use shared or non-shared page walkers to split the huge pages. Signed-off-by: Vipin Sharma --- arch/arm64/kvm/mmu.c | 10 ++++++---- 1 file changed, 6 insertions(+), 4 deletions(-) diff --git a/arch/arm64/kvm/mmu.c b/arch/arm64/kvm/mmu.c index 34d2bd03cf5f..6dd964e3682c 100644 --- a/arch/arm64/kvm/mmu.c +++ b/arch/arm64/kvm/mmu.c @@ -118,7 +118,8 @@ static bool need_split_memcache_topup_or_resched(struct kvm *kvm) } static int kvm_mmu_split_huge_pages(struct kvm *kvm, phys_addr_t addr, - phys_addr_t end) + phys_addr_t end, + enum kvm_pgtable_walk_flags flags) { struct kvm_mmu_memory_cache *cache; struct kvm_pgtable *pgt; @@ -153,7 +154,8 @@ static int kvm_mmu_split_huge_pages(struct kvm *kvm, phys_addr_t addr, return -EINVAL; next = __stage2_range_addr_end(addr, end, chunk_size); - ret = kvm_pgtable_stage2_split(pgt, addr, next - addr, cache, 0); + ret = kvm_pgtable_stage2_split(pgt, addr, next - addr, cache, + flags); if (ret) break; } while (addr = next, addr != end); @@ -1112,7 +1114,7 @@ static void kvm_mmu_split_memory_region(struct kvm *kvm, int slot) end = (memslot->base_gfn + memslot->npages) << PAGE_SHIFT; write_lock(&kvm->mmu_lock); - kvm_mmu_split_huge_pages(kvm, start, end); + kvm_mmu_split_huge_pages(kvm, start, end, 0); write_unlock(&kvm->mmu_lock); } @@ -1149,7 +1151,7 @@ void kvm_arch_mmu_enable_log_dirty_pt_masked(struct kvm *kvm, * again. */ if (kvm_dirty_log_manual_protect_and_init_set(kvm)) - kvm_mmu_split_huge_pages(kvm, start, end); + kvm_mmu_split_huge_pages(kvm, start, end, 0); write_unlock(&kvm->mmu_lock); }