From patchwork Fri Aug 11 04:51:16 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Raghavendra Rao Ananta X-Patchwork-Id: 13350078 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 728E3C04A94 for ; Fri, 11 Aug 2023 04:51:46 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233486AbjHKEvo (ORCPT ); Fri, 11 Aug 2023 00:51:44 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:58012 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233027AbjHKEvm (ORCPT ); Fri, 11 Aug 2023 00:51:42 -0400 Received: from mail-oo1-xc4a.google.com (mail-oo1-xc4a.google.com [IPv6:2607:f8b0:4864:20::c4a]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id A7D462D66 for ; Thu, 10 Aug 2023 21:51:39 -0700 (PDT) Received: by mail-oo1-xc4a.google.com with SMTP id 006d021491bc7-56d46f0ac4bso1724104eaf.1 for ; Thu, 10 Aug 2023 21:51:39 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20221208; t=1691729498; x=1692334298; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:from:to:cc:subject:date:message-id:reply-to; bh=ASzbcsqwIIPxgx+XyAMT2G1wf8WK9Z2hf5Cip/a2faA=; b=uAabUmiZLe4MoUbS9wWG4jcqfN0u7QlPThTWrmHmQHgIqkO2BufLaqzmmlZnIyCOO+ T/L4kbkpAFt+ZBdM8kowjgzj6ukuum0CjGTGLYU3iRP5tAAb3o0Ntc7xlF3UR3cHB4tn DeUzU/obpskCQQfPFVk0wKOJHfy6VGzilCBOqGZ4AzgEZ8gbc7vfKZNsMiDf+Mnw4tyT 6nipzycm7kXiOKYibxHOYUWZ2mkVxSRxc5NUa35+yCEee1ubON6GL22QYtP7OtxRf/u6 JsUs87W8hFKFBeYOzN3POKlGxAmYSwY+LebXiY8Q3ZfGJNrmkf5yu6H0xJ2oAOGtMDcq RlQg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1691729498; x=1692334298; 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=ASzbcsqwIIPxgx+XyAMT2G1wf8WK9Z2hf5Cip/a2faA=; b=eycXD/dI2wokWe5hcLdst/zNLEpul4BUnz3lXp5C3hSiPtHOF+E7oDr0TpcZNASsHM FLAbNnQ290ctiydsfsl7/+hlAgROSwChqjEUamPCF0wgbo1DZvjNBf++ihH7ipxRQc1L 6CJOC0/vue0zkL6hywnf6dWVexVQoaUjPBd/jJIlI3MZ4/shc3AUhEp+46qqyIsoxKbm /xtwSpTc6jv9NRyWUz8wcbJ8p9gw4ixvH23cSrIs+0o6eB+dvS9pRYl5fwiuDZin2M7Y lRPkziGaazLJ0jKMJrL/8xu1kXqFCfDukChgww9uhdT7EowWi2fykWv8bxk3TICIQa+U aNow== X-Gm-Message-State: AOJu0YygYT1jFlSsLsHeYHzwTGsh2BV8XhwU7PeT+W5+u+Vv00Ldaekh xi3/4SaxXBBFKRaG1QuuKMDT4yjfumJ6 X-Google-Smtp-Source: AGHT+IE/nnO7E1ywpn5IoMTUCGRwpLBu6xlqSUrvCHD1gTpM15da9wapCOhtsOAsZCjiWO4g5dJl7qthkafm X-Received: from rananta-linux.c.googlers.com ([fda3:e722:ac3:cc00:2b:ff92:c0a8:22b5]) (user=rananta job=sendgmr) by 2002:a05:6870:a8a8:b0:1bf:d3b8:5cae with SMTP id eb40-20020a056870a8a800b001bfd3b85caemr12117oab.10.1691729498753; Thu, 10 Aug 2023 21:51:38 -0700 (PDT) Date: Fri, 11 Aug 2023 04:51:16 +0000 In-Reply-To: <20230811045127.3308641-1-rananta@google.com> Mime-Version: 1.0 References: <20230811045127.3308641-1-rananta@google.com> X-Mailer: git-send-email 2.41.0.640.ga95def55d0-goog Message-ID: <20230811045127.3308641-4-rananta@google.com> Subject: [PATCH v9 03/14] KVM: arm64: Use kvm_arch_flush_remote_tlbs() From: Raghavendra Rao Ananta To: Oliver Upton , Marc Zyngier , James Morse , Suzuki K Poulose Cc: Paolo Bonzini , Sean Christopherson , Huacai Chen , Zenghui Yu , Anup Patel , Atish Patra , Jing Zhang , Reiji Watanabe , Colton Lewis , Raghavendra Rao Anata , David Matlack , Fuad Tabba , 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-kernel@vger.kernel.org, kvm@vger.kernel.org, Shaoqin Huang , Gavin Shan Precedence: bulk List-ID: X-Mailing-List: linux-mips@vger.kernel.org Stop depending on CONFIG_HAVE_KVM_ARCH_TLB_FLUSH_ALL and opt to standardize on kvm_arch_flush_remote_tlbs() since it avoids duplicating the generic TLB stats across architectures that implement their own remote TLB flush. This adds an extra function call to the ARM64 kvm_flush_remote_tlbs() path, but that is a small cost in comparison to flushing remote TLBs. In addition, instead of just incrementing remote_tlb_flush_requests stat, the generic interface would also increment the remote_tlb_flush stat. Signed-off-by: Raghavendra Rao Ananta Reviewed-by: Shaoqin Huang Reviewed-by: Gavin Shan --- arch/arm64/include/asm/kvm_host.h | 2 ++ arch/arm64/kvm/Kconfig | 1 - arch/arm64/kvm/mmu.c | 6 +++--- 3 files changed, 5 insertions(+), 4 deletions(-) diff --git a/arch/arm64/include/asm/kvm_host.h b/arch/arm64/include/asm/kvm_host.h index 8b6096753740c..20f2ba149c70c 100644 --- a/arch/arm64/include/asm/kvm_host.h +++ b/arch/arm64/include/asm/kvm_host.h @@ -1111,6 +1111,8 @@ int __init kvm_set_ipa_limit(void); #define __KVM_HAVE_ARCH_VM_ALLOC struct kvm *kvm_arch_alloc_vm(void); +#define __KVM_HAVE_ARCH_FLUSH_REMOTE_TLBS + static inline bool kvm_vm_is_protected(struct kvm *kvm) { return false; diff --git a/arch/arm64/kvm/Kconfig b/arch/arm64/kvm/Kconfig index f531da6b362e9..6b730fcfee379 100644 --- a/arch/arm64/kvm/Kconfig +++ b/arch/arm64/kvm/Kconfig @@ -25,7 +25,6 @@ menuconfig KVM select MMU_NOTIFIER select PREEMPT_NOTIFIERS select HAVE_KVM_CPU_RELAX_INTERCEPT - select HAVE_KVM_ARCH_TLB_FLUSH_ALL select KVM_MMIO select KVM_GENERIC_DIRTYLOG_READ_PROTECT select KVM_XFER_TO_GUEST_WORK diff --git a/arch/arm64/kvm/mmu.c b/arch/arm64/kvm/mmu.c index 6db9ef288ec38..0ac721fa27f18 100644 --- a/arch/arm64/kvm/mmu.c +++ b/arch/arm64/kvm/mmu.c @@ -161,15 +161,15 @@ static bool memslot_is_logging(struct kvm_memory_slot *memslot) } /** - * kvm_flush_remote_tlbs() - flush all VM TLB entries for v7/8 + * kvm_arch_flush_remote_tlbs() - flush all VM TLB entries for v7/8 * @kvm: pointer to kvm structure. * * Interface to HYP function to flush all VM TLB entries */ -void kvm_flush_remote_tlbs(struct kvm *kvm) +int kvm_arch_flush_remote_tlbs(struct kvm *kvm) { - ++kvm->stat.generic.remote_tlb_flush_requests; kvm_call_hyp(__kvm_tlb_flush_vmid, &kvm->arch.mmu); + return 0; } static bool kvm_is_device_pfn(unsigned long pfn)