From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-17.0 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER, INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED, USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 7991EC433C1 for ; Fri, 19 Mar 2021 16:19:43 +0000 (UTC) Received: from desiato.infradead.org (desiato.infradead.org [90.155.92.199]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 165346197D for ; Fri, 19 Mar 2021 16:19:43 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 165346197D Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=arm.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=desiato.20200630; h=Sender:Content-Transfer-Encoding :Content-Type:MIME-Version:List-Subscribe:List-Help:List-Post:List-Archive: List-Unsubscribe:List-Id:References:In-Reply-To:Message-Id:Date:Subject:Cc:To :From:Reply-To:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=6/1sljGMiow1NSNdMKLZlx8WIkuia+a+qFmlGuKtzQo=; b=krMuHbA+D4o5rmQ0gm6Z+wcc3X 4a8LQKv9EYIL3fTfhrQJWFzP/oM5Acdq1aP+uWCs5JHvoPBN0OceXvhaU3o/UjJhh2G0OckK5NL21 osxbM79ViMZD+5URKuUk3SuoT2iBjPjlaqM1pM4t2NKQrvPJ8L65WBJA1IhJLDyl+ViZdnPBlw6D7 nt9WJRp48FN4fgIxSQTAD97JsLB3jUsE4970wFZaLdnLR82ewJ4gDgI/YNZ3Nzye4li9eFGnE/4VI la8keMgQJu8gCfA1krOXrv/MejkYi1Txl/lLnvxvk6zRZ8w54fqk/jbCJjATpekHqb7UtESeD05Ar x/wIoG/Q==; Received: from localhost ([::1] helo=desiato.infradead.org) by desiato.infradead.org with esmtp (Exim 4.94 #2 (Red Hat Linux)) id 1lNHpR-007g8J-PV; Fri, 19 Mar 2021 16:18:25 +0000 Received: from foss.arm.com ([217.140.110.172]) by desiato.infradead.org with esmtp (Exim 4.94 #2 (Red Hat Linux)) id 1lNHp8-007g5j-UD for linux-arm-kernel@lists.infradead.org; Fri, 19 Mar 2021 16:18:10 +0000 Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 55769142F; Fri, 19 Mar 2021 09:18:04 -0700 (PDT) Received: from yoan-MS-7758.Home (unknown [172.31.20.19]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPA id 05D353F718; Fri, 19 Mar 2021 09:18:02 -0700 (PDT) From: Yoan Picchi To: maz@kernel.org, james.morse@arm.com, julien.thierry.kdev@gmail.com, suzuki.poulose@arm.com, linux-arm-kernel@lists.infradead.org, kvmarm@lists.cs.columbia.edu Cc: catalin.marinas@arm.com, will@kernel.org, Yoan Picchi Subject: [PATCH 4/7] KVM: arm64: Add flush_all_cache_lines counter for kvm_stat Date: Fri, 19 Mar 2021 16:17:08 +0000 Message-Id: <20210319161711.24972-5-yoan.picchi@arm.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20210319161711.24972-1-yoan.picchi@arm.com> References: <20210319161711.24972-1-yoan.picchi@arm.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20210319_161807_147852_B8458625 X-CRM114-Status: UNSURE ( 8.28 ) X-CRM114-Notice: Please train this message. X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Add a counter that triggers when all the cache are flushed. This happens when toggling caching for instance. Signed-off-by: Yoan Picchi --- arch/arm64/include/asm/kvm_host.h | 1 + arch/arm64/kvm/guest.c | 1 + arch/arm64/kvm/mmu.c | 1 + 3 files changed, 3 insertions(+) diff --git a/arch/arm64/include/asm/kvm_host.h b/arch/arm64/include/asm/kvm_host.h index 3609aa89d..e6967951f 100644 --- a/arch/arm64/include/asm/kvm_host.h +++ b/arch/arm64/include/asm/kvm_host.h @@ -547,6 +547,7 @@ static inline bool __vcpu_write_sys_reg_to_cpu(u64 val, int reg) struct kvm_vm_stat { ulong remote_tlb_flush; + ulong flush_all_cache_lines; ulong cached_page_invalidated; }; diff --git a/arch/arm64/kvm/guest.c b/arch/arm64/kvm/guest.c index f6b1f0b63..d948c3bd2 100644 --- a/arch/arm64/kvm/guest.c +++ b/arch/arm64/kvm/guest.c @@ -41,6 +41,7 @@ struct kvm_stats_debugfs_item debugfs_entries[] = { VCPU_STAT("regular_page_mapped", regular_page_mapped), VCPU_STAT("huge_page_mapped", huge_page_mapped), VM_STAT("remote_tlb_flush", remote_tlb_flush), + VM_STAT("flush_all_cache_lines", flush_all_cache_lines), VM_STAT("cached_page_invalidated", cached_page_invalidated), VCPU_STAT("exits", exits), VCPU_STAT("halt_poll_success_ns", halt_poll_success_ns), diff --git a/arch/arm64/kvm/mmu.c b/arch/arm64/kvm/mmu.c index d6ddf5ab8..985b048df 100644 --- a/arch/arm64/kvm/mmu.c +++ b/arch/arm64/kvm/mmu.c @@ -181,6 +181,7 @@ static void stage2_flush_vm(struct kvm *kvm) kvm_for_each_memslot(memslot, slots) stage2_flush_memslot(kvm, memslot); + kvm->stat.flush_all_cache_lines++; spin_unlock(&kvm->mmu_lock); srcu_read_unlock(&kvm->srcu, idx); } -- 2.17.1 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel