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=-13.6 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS 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 73139C433EF for ; Fri, 3 Sep 2021 16:07:16 +0000 (UTC) Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (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 3A042610C8 for ; Fri, 3 Sep 2021 16:07:16 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.1 mail.kernel.org 3A042610C8 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=redhat.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=nongnu.org Received: from localhost ([::1]:55856 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1mMBil-0004hX-Cv for qemu-devel@archiver.kernel.org; Fri, 03 Sep 2021 12:07:15 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:58096) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1mMBXw-0001kH-IN for qemu-devel@nongnu.org; Fri, 03 Sep 2021 11:56:04 -0400 Received: from us-smtp-delivery-124.mimecast.com ([170.10.133.124]:48649) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1mMBXu-0000jX-Qs for qemu-devel@nongnu.org; Fri, 03 Sep 2021 11:56:04 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1630684562; 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: in-reply-to:in-reply-to:references:references; bh=kziqgMymkMLtY5poKAOZZqOtzjY64iw5zYUWpNorWmw=; b=Mpv2wDRrNCermvkv8AbVWJD81xynIqr0DKDRSu8HSiLqMfQvve1VqyoCrmb+aNbxgfXJPq nrUNZ0CKdlzjCS5zDdhs0vcBzFdR+HplIxzWV7Eum+qoEIaTG1DoTUsoj+7Qymsqq8duY8 GeI43VfCw7oAJFZNk8T6ExF513bgz+8= Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-132-R18D_EbFMwCs_3RK1YmW8A-1; Fri, 03 Sep 2021 11:55:58 -0400 X-MC-Unique: R18D_EbFMwCs_3RK1YmW8A-1 Received: from smtp.corp.redhat.com (int-mx03.intmail.prod.int.phx2.redhat.com [10.5.11.13]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id 00D598015C7; Fri, 3 Sep 2021 15:55:56 +0000 (UTC) Received: from t480s.redhat.com (unknown [10.39.193.142]) by smtp.corp.redhat.com (Postfix) with ESMTP id D673C60916; Fri, 3 Sep 2021 15:55:53 +0000 (UTC) From: David Hildenbrand To: qemu-devel@nongnu.org Subject: [PATCH v3 10/13] hw/s390x/s390-skeys: use memory mapping to detect which storage keys to dump Date: Fri, 3 Sep 2021 17:55:11 +0200 Message-Id: <20210903155514.44772-11-david@redhat.com> In-Reply-To: <20210903155514.44772-1-david@redhat.com> References: <20210903155514.44772-1-david@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.13 Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=david@redhat.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Transfer-Encoding: 8bit Content-Type: text/plain; charset="US-ASCII" Received-SPF: pass client-ip=170.10.133.124; envelope-from=david@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -31 X-Spam_score: -3.2 X-Spam_bar: --- X-Spam_report: (-3.2 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.392, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_LOW=-0.7, RCVD_IN_MSPIKE_H2=-0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: "Jason J . Herne" , Thomas Huth , Janosch Frank , David Hildenbrand , Cornelia Huck , Richard Henderson , Halil Pasic , Christian Borntraeger , qemu-s390x@nongnu.org, Claudio Imbrenda Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" Handle it similar to migration. Assert that we're holding the BQL, to make sure we don't see concurrent modifications. Reviewed-by: Thomas Huth Signed-off-by: David Hildenbrand --- hw/s390x/s390-skeys.c | 50 ++++++++++++++++++++++++++----------------- 1 file changed, 30 insertions(+), 20 deletions(-) diff --git a/hw/s390x/s390-skeys.c b/hw/s390x/s390-skeys.c index 250685a95a..56a47fe180 100644 --- a/hw/s390x/s390-skeys.c +++ b/hw/s390x/s390-skeys.c @@ -110,11 +110,10 @@ void qmp_dump_skeys(const char *filename, Error **errp) { S390SKeysState *ss = s390_get_skeys_device(); S390SKeysClass *skeyclass = S390_SKEYS_GET_CLASS(ss); - MachineState *ms = MACHINE(qdev_get_machine()); - const uint64_t total_count = ms->ram_size / TARGET_PAGE_SIZE; - uint64_t handled_count = 0, cur_count; + GuestPhysBlockList guest_phys_blocks; + GuestPhysBlock *block; + uint64_t pages, gfn; Error *lerr = NULL; - vaddr cur_gfn = 0; uint8_t *buf; int ret; int fd; @@ -145,28 +144,39 @@ void qmp_dump_skeys(const char *filename, Error **errp) goto out; } - /* we'll only dump initial memory for now */ - while (handled_count < total_count) { - /* Calculate how many keys to ask for & handle overflow case */ - cur_count = MIN(total_count - handled_count, S390_SKEYS_BUFFER_SIZE); + assert(qemu_mutex_iothread_locked()); + guest_phys_blocks_init(&guest_phys_blocks); + guest_phys_blocks_append(&guest_phys_blocks); - ret = skeyclass->get_skeys(ss, cur_gfn, cur_count, buf); - if (ret < 0) { - error_setg(errp, "get_keys error %d", ret); - goto out_free; - } + QTAILQ_FOREACH(block, &guest_phys_blocks.head, next) { + assert(QEMU_IS_ALIGNED(block->target_start, TARGET_PAGE_SIZE)); + assert(QEMU_IS_ALIGNED(block->target_end, TARGET_PAGE_SIZE)); - /* write keys to stream */ - write_keys(f, buf, cur_gfn, cur_count, &lerr); - if (lerr) { - goto out_free; - } + gfn = block->target_start / TARGET_PAGE_SIZE; + pages = (block->target_end - block->target_start) / TARGET_PAGE_SIZE; - cur_gfn += cur_count; - handled_count += cur_count; + while (pages) { + const uint64_t cur_pages = MIN(pages, S390_SKEYS_BUFFER_SIZE); + + ret = skeyclass->get_skeys(ss, gfn, cur_pages, buf); + if (ret < 0) { + error_setg_errno(errp, -ret, "get_keys error"); + goto out_free; + } + + /* write keys to stream */ + write_keys(f, buf, gfn, cur_pages, &lerr); + if (lerr) { + goto out_free; + } + + gfn += cur_pages; + pages -= cur_pages; + } } out_free: + guest_phys_blocks_free(&guest_phys_blocks); error_propagate(errp, lerr); g_free(buf); out: -- 2.31.1