From patchwork Fri Aug 19 00:55:56 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Gavin Shan X-Patchwork-Id: 12948208 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 bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 58091C00140 for ; Fri, 19 Aug 2022 00:58:05 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version: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:In-Reply-To:References: List-Owner; bh=BgbDKCVhvwOLwGoeouWfr8+uSuyUOdhGjSO28YQG/10=; b=JsuzuJL3BbUQB/ IQ3kHQscY3v4ZwiDJBnTmRo7sPz/XUtLZG4DHg5xfqBXqxNuA4gJ/25InXdG9NCZxsrFGdMzIek6j 4KBDH5nTWyXhtXYGtZCbeHI84HVOq+Bip84SEy+oR0G6N8fd3rv8xrM1mES0k2TodvxG7kLToBdlc kc/Phl/vOlgn8Jgkal3s/UnBeq5PN3nQjGoUdgh6oeVeV5xn6FORkVvwqRGPBobEbsmquGsQFrwqy McWLEFGkLsKEIhqn/+nbxPxYZ5VbuxXHBnc296zT1ZWr/JCYfx137xMi2KFBVfitUm2q7xAPsUn3V gXhnVRmgwujYv/BiEqFg==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1oOqJg-00CdEb-5n; Fri, 19 Aug 2022 00:56:52 +0000 Received: from us-smtp-delivery-124.mimecast.com ([170.10.129.124]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1oOqJd-00CcqT-67 for linux-arm-kernel@lists.infradead.org; Fri, 19 Aug 2022 00:56:50 +0000 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1660870605; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding; bh=0mjtjKvaCKjFD+8hWTDMS94mOG+sVGwcb17W8u/FnUA=; b=VFgPfJn5YpXYG24LEh5mlvuWIeLIILB54WPfhqP1Tl+dOYqU33U192yFA+BzpnWnopA40h XBhvkFrrP6Sc+/4iKEnsR1PeaOmZ/f1engJzHGqnWeyBKDlT6/4RmkPJiAfaupdbcwaVsT MRTKDsI4DYHMnbqAnfdUVeNDEAZ4Y+o= Received: from mimecast-mx02.redhat.com (mimecast-mx02.redhat.com [66.187.233.88]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id us-mta-317--evnGzXCP_CdJVefZLfQyg-1; Thu, 18 Aug 2022 20:56:42 -0400 X-MC-Unique: -evnGzXCP_CdJVefZLfQyg-1 Received: from smtp.corp.redhat.com (int-mx08.intmail.prod.int.rdu2.redhat.com [10.11.54.8]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx02.redhat.com (Postfix) with ESMTPS id 0D370802D2C; Fri, 19 Aug 2022 00:56:41 +0000 (UTC) Received: from gshan.redhat.com (vpn2-54-16.bne.redhat.com [10.64.54.16]) by smtp.corp.redhat.com (Postfix) with ESMTPS id 51086C15BB8; Fri, 19 Aug 2022 00:56:31 +0000 (UTC) From: Gavin Shan To: kvmarm@lists.cs.columbia.edu Cc: linux-arm-kernel@lists.infradead.org, kvm@vger.kernel.org, linux-kernel@vger.kernel.org, linux-doc@vger.kernel.org, linux-kselftest@vger.kernel.org, peterx@redhat.com, pbonzini@redhat.com, corbet@lwn.net, maz@kernel.org, james.morse@arm.com, alexandru.elisei@arm.com, suzuki.poulose@arm.com, oliver.upton@linux.dev, catalin.marinas@arm.com, will@kernel.org, shuah@kernel.org, seanjc@google.com, drjones@redhat.com, dmatlack@google.com, bgardon@google.com, ricarkol@google.com, zhenyzha@redhat.com, shan.gavin@gmail.com Subject: [PATCH v1 0/5] KVM: arm64: Enable ring-based dirty memory tracking Date: Fri, 19 Aug 2022 08:55:56 +0800 Message-Id: <20220819005601.198436-1-gshan@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.85 on 10.11.54.8 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20220818_175649_322414_37800276 X-CRM114-Status: GOOD ( 11.63 ) 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: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org This series enables the ring-based dirty memory tracking for ARM64. The feature has been available and enabled on x86 for a while. It is beneficial when the number of dirty pages is small in a checkpointing system or live migration scenario. More details can be found from fb04a1eddb1a ("KVM: X86: Implement ring-based dirty memory tracking"). The generic part has been comprehensive enough, meaning there isn't too much work, needed to extend it to ARM64. - PATCH[1] enables the feature on ARM64 - PATCH[2-5] improves kvm/selftests/dirty_log_test Testing ======= - kvm/selftests/dirty_log_test - Live migration by QEMU - Host with 4KB or 64KB base page size Gavin Shan (5): KVM: arm64: Enable ring-based dirty memory tracking KVM: selftests: Use host page size to map ring buffer in dirty_log_test KVM: selftests: Dirty host pages in dirty_log_test KVM: selftests: Clear dirty ring states between two modes in dirty_log_test KVM: selftests: Automate choosing dirty ring size in dirty_log_test Documentation/virt/kvm/api.rst | 2 +- arch/arm64/include/uapi/asm/kvm.h | 1 + arch/arm64/kvm/Kconfig | 1 + arch/arm64/kvm/arm.c | 8 ++ tools/testing/selftests/kvm/dirty_log_test.c | 101 ++++++++++++++----- tools/testing/selftests/kvm/lib/kvm_util.c | 2 +- 6 files changed, 88 insertions(+), 27 deletions(-)