From patchwork Tue Aug 8 23:13:19 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: 13347182 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 B2C02C04FDF for ; Tue, 8 Aug 2023 23:13:40 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231776AbjHHXNk (ORCPT ); Tue, 8 Aug 2023 19:13:40 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:54864 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231738AbjHHXNj (ORCPT ); Tue, 8 Aug 2023 19:13:39 -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 B1A4919A1 for ; Tue, 8 Aug 2023 16:13:38 -0700 (PDT) Received: by mail-yb1-xb4a.google.com with SMTP id 3f1490d57ef6-d11f35a0d5cso7292573276.1 for ; Tue, 08 Aug 2023 16:13:38 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20221208; t=1691536418; x=1692141218; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:from:to:cc:subject:date:message-id:reply-to; bh=yofTwj8ZWcGjgw9v2JlEZNUSzmrec+LwekHHUJcpAoM=; b=dpvxAljlEqRicljPQxNOJb+MByUQynWkaoJYtNkwzaTYBVofoDLxhXQ4NUQQ/PzLSf NAtCKDbb8oJ0I+3uBtvhYWPM5zzVcZGZW3pDxQOMxKp+lvQ7BjdFrNc/q/apmXEYUx/b QhVGqmoFiocVQByOfmb4QZxlbWrg6Ieus4zhxHuCqIJKlof4GWqyS/gC4YZttzjEIT/h Whg24RDAmIE9PEXxBdCoM/i4l/H27VeCyO3o8GhqYAZYL0To+EyyDC+2J360ckq2AoBz pk0d/gNWDg05ec8YE3MwSGw7fdP5YwY4vaL8VuAGMAaNIrbzBVJmLTs6Pw2oc6uWyPcm NgSg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1691536418; x=1692141218; 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=yofTwj8ZWcGjgw9v2JlEZNUSzmrec+LwekHHUJcpAoM=; b=Nyq2J5CUGDWRlBh7cXdh/L7okBS4GExRJbMdL8UzpzWehgPy8Aq3qwZfRO8UtUr2b+ GiOnesAdk7WimU1ZoDdxD2w2E88J4IqGU0YGutdZBioyjMrK7ptci3ewgFggfwj+FRmc Uw4Btlj0/NeFsZZLfvGaqZn0OFRMjg9nzvj1iTfEbO6mQVBwxJfTEOs5mWkjKHAM/0D+ AZt+3akSXVfqlqEmD87wYqaqbbHJOrjeth2/FcVOBSSD6HU34Xuw2x2rVPblQF5/Vo89 s4ONQYGs+bRwyGMW4M2YvBwOwBafrwXqWikGwwJYF5MlkolliginePmg9W6aIVauAhpZ gI4Q== X-Gm-Message-State: AOJu0Ywl7egjMzbppu0px6D/7is1Os526cm9YyUc/PbPJyGGfY9KM6e0 TCanmwtHdVgrHY+lIPMHg5YmRrk6PQo5 X-Google-Smtp-Source: AGHT+IEMoPWfeZ+OLCK2D9UT69oNcAo0brgl53831EkFIxzA/BaKPU3QvQO6q12mm6VixOduKcfqU57b7CIQ X-Received: from rananta-linux.c.googlers.com ([fda3:e722:ac3:cc00:2b:ff92:c0a8:22b5]) (user=rananta job=sendgmr) by 2002:a25:e90b:0:b0:d35:bf85:5aa0 with SMTP id n11-20020a25e90b000000b00d35bf855aa0mr23366ybd.4.1691536418029; Tue, 08 Aug 2023 16:13:38 -0700 (PDT) Date: Tue, 8 Aug 2023 23:13:19 +0000 In-Reply-To: <20230808231330.3855936-1-rananta@google.com> Mime-Version: 1.0 References: <20230808231330.3855936-1-rananta@google.com> X-Mailer: git-send-email 2.41.0.640.ga95def55d0-goog Message-ID: <20230808231330.3855936-4-rananta@google.com> Subject: [PATCH v8 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 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)