From patchwork Sat Jul 22 02:22:41 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: 13322720 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 A07E7EB64DD for ; Sat, 22 Jul 2023 02:23:15 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230526AbjGVCXM (ORCPT ); Fri, 21 Jul 2023 22:23:12 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:51898 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230354AbjGVCXB (ORCPT ); Fri, 21 Jul 2023 22:23:01 -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 C7D292727 for ; Fri, 21 Jul 2023 19:22:57 -0700 (PDT) Received: by mail-yw1-x1149.google.com with SMTP id 00721157ae682-57059f90cc5so27303057b3.0 for ; Fri, 21 Jul 2023 19:22:57 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20221208; t=1689992577; x=1690597377; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:from:to:cc:subject:date:message-id:reply-to; bh=SI6Gva1qvgHyCE7QYiuLXB9Rb6SmeiZnCZaqC2WR/Sc=; b=pclINCkRdRgYAwaus01ejO4ihWr9A2XfL0ddUkYV/8EArvjBZbbuZd1gAvOxilC3EG LI5ig+mCKvx5zZiKKeWtoSn1KRLqe9PQt44bIhGnETmctKhIlGGYczLFfINjjUmeV8eM vF/f00G3soAZho0MrsjCa00CHbPDXDffhgNgwsvO6ihBYLorYgrQRClyFLc4+ju/Ndg2 KuE5q+mG/CiKyTPw9stpjZ4mmv5/rWSOe25ukny2y+mj1Vac8JoETMrp/Yu7K8MxNjLv ZwVGfuZusT3+e53fBM7XlIyyfghatocIbRyjEOEWb7qvJx+JIJLcOjh2l5X25Jd+zX6l km/w== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1689992577; x=1690597377; 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=SI6Gva1qvgHyCE7QYiuLXB9Rb6SmeiZnCZaqC2WR/Sc=; b=XEmHa4Ad06MvYWTy4rS2ts3bRjD6NEq39mJUOLM18tisOzYFMOTOXivSdvqnP1LbPD mPEApiFGXUwyIaK6m7IS2EjL6v2+yK6C805Q7a0MFuyGETWFlsfnnrbFJRH767ckfAvr GUt5XNPfvzqD8E0zLuKeJtpiIAvV/kPfqHGd8bdftAZ86P0VCKo6aEx/6ChUJX0jWVVc dbO7S03SBjYM6tJNc9cWRtZQSFfK2l2R9/EwjPhCuJOcPHPsug6VO96WwY2/MpcA+3nw q9UGhOigjXw4qmRFUy4WuLkiLHf99p9eui5efD44DCpfXxNVjs0wQtPl3xaTHTmww8M4 qGiQ== X-Gm-Message-State: ABy/qLammUVgei9VPe0u7HR1eh+gUf2xMTl5i86QF70CTS+5YNo0dsfv HK6lMTQ5hzxA5Sf9q5lql5SijBQ0qNq/ X-Google-Smtp-Source: APBJJlE74S44aAdDkeUWprjnh97a+iXOQv70bhnTttKdjXjLztwho8eu5se6DQmHFzL4Hoaq3q6ibV20GsDb X-Received: from rananta-linux.c.googlers.com ([fda3:e722:ac3:cc00:2b:ff92:c0a8:22b5]) (user=rananta job=sendgmr) by 2002:a81:e801:0:b0:57a:793:7fb0 with SMTP id a1-20020a81e801000000b0057a07937fb0mr15253ywm.3.1689992577014; Fri, 21 Jul 2023 19:22:57 -0700 (PDT) Date: Sat, 22 Jul 2023 02:22:41 +0000 In-Reply-To: <20230722022251.3446223-1-rananta@google.com> Mime-Version: 1.0 References: <20230722022251.3446223-1-rananta@google.com> X-Mailer: git-send-email 2.41.0.487.g6d72f3e995-goog Message-ID: <20230722022251.3446223-3-rananta@google.com> Subject: [PATCH v7 02/12] 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 , 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 Precedence: bulk List-ID: X-Mailing-List: kvm@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 --- arch/arm64/include/asm/kvm_host.h | 3 +++ arch/arm64/kvm/Kconfig | 1 - arch/arm64/kvm/mmu.c | 6 +++--- 3 files changed, 6 insertions(+), 4 deletions(-) diff --git a/arch/arm64/include/asm/kvm_host.h b/arch/arm64/include/asm/kvm_host.h index 8b6096753740..7281222f24ef 100644 --- a/arch/arm64/include/asm/kvm_host.h +++ b/arch/arm64/include/asm/kvm_host.h @@ -1111,6 +1111,9 @@ 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 +int kvm_arch_flush_remote_tlbs(struct kvm *kvm); + 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 f531da6b362e..6b730fcfee37 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 6db9ef288ec3..0ac721fa27f1 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)