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=-8.3 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH, MAILING_LIST_MULTI,NICE_REPLY_A,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED, USER_AGENT_SANE_1 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 70E3CC4363A for ; Wed, 21 Oct 2020 07:58:20 +0000 (UTC) Received: from merlin.infradead.org (merlin.infradead.org [205.233.59.134]) (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 C3D7E22249 for ; Wed, 21 Oct 2020 07:58:19 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="WfjCANzK"; dkim=fail reason="signature verification failed" (2048-bit key) header.d=ibm.com header.i=@ibm.com header.b="dUv4rTX/" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org C3D7E22249 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=linux.ibm.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=merlin.20170209; h=Sender:Content-Transfer-Encoding: Content-Type:List-Subscribe:List-Help:List-Post:List-Archive:List-Unsubscribe :List-Id:In-Reply-To:MIME-Version:Date:Message-ID:From:References:To:Subject: Reply-To:Cc:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=SfR2dUjrTQ07ysxwhxhrmb490lZ7HPHOx4nyK4J4qR8=; b=WfjCANzKAzUwCBVtaW7o2uJqZo sAnnuQ8myXQjTf0kSI4xWE2+a6LRe0c7eEFbKRd3jSN2W3NPQHZd7syaZtpRiliS7IacSYjjz+2If HirEmKf8G7YVCbuv7Muvw6Trgrv7om5pst/FA+18S2i1k4LRUn2n9WAiLaDUJFv60Z0kLhzbLOJoV rUMA9UMDMw3QK4SzzoqxVhJR5j8aIvD66L11M2SEhwu47bcApV8s9ErOexWBgdIZ8woGjd1QEuzAw Hp9ivzQlAJhobbX+qBSfe7R7Dk4GN7d7DsetMcSnBrVhUDer25se9M1aPWIMwa5aScrhnbEKUBoAG jv8lViVA==; Received: from localhost ([::1] helo=merlin.infradead.org) by merlin.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1kV8yl-00032i-Ne; Wed, 21 Oct 2020 07:56:15 +0000 Received: from mx0a-001b2d01.pphosted.com ([148.163.156.1]) by merlin.infradead.org with esmtps (Exim 4.92.3 #3 (Red Hat Linux)) id 1kV8yh-00031j-Dq for linux-arm-kernel@lists.infradead.org; Wed, 21 Oct 2020 07:56:13 +0000 Received: from pps.filterd (m0098393.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.16.0.42/8.16.0.42) with SMTP id 09L7X16V066044; Wed, 21 Oct 2020 03:56:04 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ibm.com; h=subject : to : references : from : message-id : date : mime-version : in-reply-to : content-type : content-transfer-encoding; s=pp1; bh=lv0GwBldnmbZQXrayavRSYj6mxTJ2VfqBwFS3jQIG0c=; b=dUv4rTX/nfJgprmkjOdg/5aMNPuqyVb/enj5JDQw9bniaKU2bnh8sbD2Y8UOdBgiaPty 9nnPLGBESYPJKwDsDB98+duUeED7csFciXP23ClQhtZhGQ1arOV75HXtSWrTF3bTdM/a R1XwxPsvjilXzGOOu7JJ8R95o65oCrwFvZte6e1Piz4lya872/SzZHEoZ7GsuMzH19al 0rnOqou3KlBmxWNZKa7kH6GzbDoXTeeuyhHGV02HSvREsYslXl3QtEAplEW7VW7RnHaK AjKKmH/TdGcIYX/5UDQoDExVw2rwMpxPlF1iFwQjshxFzKC3jAP0OSpSWpJICUaYtCvb vg== Received: from pps.reinject (localhost [127.0.0.1]) by mx0a-001b2d01.pphosted.com with ESMTP id 34agdm96ad-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Wed, 21 Oct 2020 03:56:03 -0400 Received: from m0098393.ppops.net (m0098393.ppops.net [127.0.0.1]) by pps.reinject (8.16.0.36/8.16.0.36) with SMTP id 09L7Y7ob070104; Wed, 21 Oct 2020 03:56:03 -0400 Received: from ppma06fra.de.ibm.com (48.49.7a9f.ip4.static.sl-reverse.com [159.122.73.72]) by mx0a-001b2d01.pphosted.com with ESMTP id 34agdm969c-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Wed, 21 Oct 2020 03:56:03 -0400 Received: from pps.filterd (ppma06fra.de.ibm.com [127.0.0.1]) by ppma06fra.de.ibm.com (8.16.0.42/8.16.0.42) with SMTP id 09L7plEK007941; Wed, 21 Oct 2020 07:56:00 GMT Received: from b06cxnps4074.portsmouth.uk.ibm.com (d06relay11.portsmouth.uk.ibm.com [9.149.109.196]) by ppma06fra.de.ibm.com with ESMTP id 347qvha47f-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Wed, 21 Oct 2020 07:56:00 +0000 Received: from d06av23.portsmouth.uk.ibm.com (d06av23.portsmouth.uk.ibm.com [9.149.105.59]) by b06cxnps4074.portsmouth.uk.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id 09L7twAb32506250 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Wed, 21 Oct 2020 07:55:58 GMT Received: from d06av23.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 4BD5DA4051; Wed, 21 Oct 2020 07:55:58 +0000 (GMT) Received: from d06av23.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 88367A4055; Wed, 21 Oct 2020 07:55:57 +0000 (GMT) Received: from [9.145.178.173] (unknown [9.145.178.173]) by d06av23.portsmouth.uk.ibm.com (Postfix) with ESMTP; Wed, 21 Oct 2020 07:55:57 +0000 (GMT) Subject: Re: [PATCH v2 08/17] s390/pci: Remove races against pte updates To: DRI Development , LKML , kvm@vger.kernel.org, linux-mm@kvack.org, linux-arm-kernel@lists.infradead.org, linux-samsung-soc@vger.kernel.org, linux-media@vger.kernel.org, linux-s390@vger.kernel.org, Gerald Schaefer , Daniel Vetter , Jason Gunthorpe , Dan Williams , Kees Cook , Andrew Morton , John Hubbard , =?UTF-8?B?SsOpcsO0bWUgR2xpc3Nl?= , Jan Kara References: <20201009075934.3509076-1-daniel.vetter@ffwll.ch> <20201009075934.3509076-9-daniel.vetter@ffwll.ch> <6deb08dd-46f3-bf26-5362-fdc696f6fd74@linux.ibm.com> <20201012141906.GX438822@phenom.ffwll.local> From: Niklas Schnelle Message-ID: <3594c115-541f-806a-ee33-e99a2d1d31e8@linux.ibm.com> Date: Wed, 21 Oct 2020 09:55:57 +0200 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.12.0 MIME-Version: 1.0 In-Reply-To: <20201012141906.GX438822@phenom.ffwll.local> Content-Language: en-US X-TM-AS-GCONF: 00 X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.235, 18.0.737 definitions=2020-10-21_03:2020-10-20, 2020-10-21 signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 mlxlogscore=999 lowpriorityscore=0 spamscore=0 suspectscore=0 adultscore=0 phishscore=0 malwarescore=0 bulkscore=0 clxscore=1015 mlxscore=0 impostorscore=0 priorityscore=1501 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2009150000 definitions=main-2010210060 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20201021_035611_588683_40D5C515 X-CRM114-Status: GOOD ( 30.74 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org SGkgRGFuaWVsLAoKZnJpZW5kbHkgcGluZy4gSSBoYXZlbid0IHNlZW4gYSBuZXcgdmVyc2lvbiBv ZiB0aGlzIHBhdGNoIHNlcmllcywKYXMgSSBzYWlkIEkgdGhpbmsgeW91ciBjaGFuZ2UgZm9yIHMz OTAvcGNpIGlzIGdlbmVyYWxseSB1c2VmdWwgc28KSSdtIGN1cmlvdXMsIGFyZSB5b3UgcGxhbm5p bmcgb24gc2VuZGluZyBhIG5ldyB2ZXJzaW9uIHNvb24/CklmIHlvdSB3YW50IHlvdSBjYW4gYWxz byBqdXN0IHNlbnQgdGhpcyBwYXRjaCB3aXRoIHRoZSBsYXN0IGZldwpuaXRwaWNrcyAocHJpbWFy aWx5IHRoZSBtYWlsIGFkZHJlc3MpIGZpeGVkIGFuZCBJJ2xsIGhhcHBpbHkgYXBwbHkuCgpCZXN0 IHJlZ2FyZHMsCk5pa2xhcyBTY2huZWxsZQoKT24gMTAvMTIvMjAgNDoxOSBQTSwgRGFuaWVsIFZl dHRlciB3cm90ZToKPiBPbiBNb24sIE9jdCAxMiwgMjAyMCBhdCAwNDowMzoyOFBNICswMjAwLCBO aWtsYXMgU2NobmVsbGUgd3JvdGU6Ci4uLiBzbmlwIC4uLi4KPj4+IENjOiBKYXNvbiBHdW50aG9y cGUgPGpnZ0B6aWVwZS5jYT4KPj4+IENjOiBEYW4gV2lsbGlhbXMgPGRhbi5qLndpbGxpYW1zQGlu dGVsLmNvbT4KPj4+IENjOiBLZWVzIENvb2sgPGtlZXNjb29rQGNocm9taXVtLm9yZz4KPj4+IENj OiBBbmRyZXcgTW9ydG9uIDxha3BtQGxpbnV4LWZvdW5kYXRpb24ub3JnPgo+Pj4gQ2M6IEpvaG4g SHViYmFyZCA8amh1YmJhcmRAbnZpZGlhLmNvbT4KPj4+IENjOiBKw6lyw7RtZSBHbGlzc2UgPGpn bGlzc2VAcmVkaGF0LmNvbT4KPj4+IENjOiBKYW4gS2FyYSA8amFja0BzdXNlLmN6Pgo+Pj4gQ2M6 IERhbiBXaWxsaWFtcyA8ZGFuLmoud2lsbGlhbXNAaW50ZWwuY29tPgo+Pgo+PiBUaGUgYWJvdmUg Q2M6IGxpbmUgZm9yIERhbiBXaWxsaWFtcyBpcyBhIGR1cGxpY2F0ZQo+Pgo+Pj4gQ2M6IGxpbnV4 LW1tQGt2YWNrLm9yZwo+Pj4gQ2M6IGxpbnV4LWFybS1rZXJuZWxAbGlzdHMuaW5mcmFkZWFkLm9y Zwo+Pj4gQ2M6IGxpbnV4LXNhbXN1bmctc29jQHZnZXIua2VybmVsLm9yZwo+Pj4gQ2M6IGxpbnV4 LW1lZGlhQHZnZXIua2VybmVsLm9yZwo+Pj4gQ2M6IE5pa2xhcyBTY2huZWxsZSA8c2NobmVsbGVA bGludXguaWJtLmNvbT4KPj4+IENjOiBHZXJhbGQgU2NoYWVmZXIgPGdlcmFsZC5zY2hhZWZlckBs aW51eC5pYm0uY29tPgo+Pj4gQ2M6IGxpbnV4LXMzOTBAdmdlci5rZXJuZWwub3JnCj4+PiAtLQo+ Pj4gdjI6IE1vdmUgVk1fSU8gfCBWTV9QRk5NQVAgY2hlY2tzIGFyb3VuZCBzbyB0aGV5IGtlZXAg cmV0dXJuaW5nIEVJTlZBTAo+Pj4gbGlrZSBiZWZvcmUgKEdlcmFyZCkKPj4KPj4gSSB0aGluayB0 aGUgYWJvdmUgc2hvdWxkIGdvIGJlZm9yZSB0aGUgQ0MvU2lnbmVkLW9mZi9SZXZpZXdldiBibG9j ay4KPiAKPiBUaGlzIGlzIGEgcGVyLXN1YnN5c3RlbSBiaWtlc2hlZCA6LSkgZHJpdmVycy9ncHUg ZGVmaW5pdGVseSB3YW50cyBpdAo+IGFib3ZlLCBidXQgbW9zdCBjb3JlIHN1YnN5c3RlbXMgd2Fu dCBpdCBiZWxvdy4gSSdsbCBtb3ZlIGl0Lgo+IAo+Pj4gLS0tCj4+PiAgYXJjaC9zMzkwL3BjaS9w Y2lfbW1pby5jIHwgOTggKysrKysrKysrKysrKysrKysrKysrKystLS0tLS0tLS0tLS0tLS0tLQo+ Pj4gIDEgZmlsZSBjaGFuZ2VkLCA1NyBpbnNlcnRpb25zKCspLCA0MSBkZWxldGlvbnMoLSkKPj4+ Cj4+PiBkaWZmIC0tZ2l0IGEvYXJjaC9zMzkwL3BjaS9wY2lfbW1pby5jIGIvYXJjaC9zMzkwL3Bj aS9wY2lfbW1pby5jCj4+PiBpbmRleCA0MDFjZjY3MGEyNDMuLjFhNmFkYmM2OGVlOCAxMDA2NDQK Pj4+IC0tLSBhL2FyY2gvczM5MC9wY2kvcGNpX21taW8uYwo+Pj4gKysrIGIvYXJjaC9zMzkwL3Bj aS9wY2lfbW1pby5jCj4+PiBAQCAtMTE5LDMzICsxMTksMTUgQEAgc3RhdGljIGlubGluZSBpbnQg X19tZW1jcHlfdG9pb19pbnVzZXIodm9pZCBfX2lvbWVtICpkc3QsCj4+PiAgCXJldHVybiByYzsK Pj4+ICB9Cj4+PiAgCj4+PiAtc3RhdGljIGxvbmcgZ2V0X3Bmbih1bnNpZ25lZCBsb25nIHVzZXJf YWRkciwgdW5zaWduZWQgbG9uZyBhY2Nlc3MsCj4+PiAtCQkgICAgdW5zaWduZWQgbG9uZyAqcGZu KQo+Pj4gLXsKPj4+IC0Jc3RydWN0IHZtX2FyZWFfc3RydWN0ICp2bWE7Cj4+PiAtCWxvbmcgcmV0 Owo+Pj4gLQo+Pj4gLQltbWFwX3JlYWRfbG9jayhjdXJyZW50LT5tbSk7Cj4+PiAtCXJldCA9IC1F SU5WQUw7Cj4+PiAtCXZtYSA9IGZpbmRfdm1hKGN1cnJlbnQtPm1tLCB1c2VyX2FkZHIpOwo+Pj4g LQlpZiAoIXZtYSkKPj4+IC0JCWdvdG8gb3V0Owo+Pj4gLQlyZXQgPSAtRUFDQ0VTOwo+Pj4gLQlp ZiAoISh2bWEtPnZtX2ZsYWdzICYgYWNjZXNzKSkKPj4+IC0JCWdvdG8gb3V0Owo+Pj4gLQlyZXQg PSBmb2xsb3dfcGZuKHZtYSwgdXNlcl9hZGRyLCBwZm4pOwo+Pj4gLW91dDoKPj4+IC0JbW1hcF9y ZWFkX3VubG9jayhjdXJyZW50LT5tbSk7Cj4+PiAtCXJldHVybiByZXQ7Cj4+PiAtfQo+Pj4gLQo+ Pj4gIFNZU0NBTExfREVGSU5FMyhzMzkwX3BjaV9tbWlvX3dyaXRlLCB1bnNpZ25lZCBsb25nLCBt bWlvX2FkZHIsCj4+PiAgCQljb25zdCB2b2lkIF9fdXNlciAqLCB1c2VyX2J1ZmZlciwgc2l6ZV90 LCBsZW5ndGgpCj4+PiAgewo+Pj4gIAl1OCBsb2NhbF9idWZbNjRdOwo+Pj4gIAl2b2lkIF9faW9t ZW0gKmlvX2FkZHI7Cj4+PiAgCXZvaWQgKmJ1ZjsKPj4+IC0JdW5zaWduZWQgbG9uZyBwZm47Cj4+ PiArCXN0cnVjdCB2bV9hcmVhX3N0cnVjdCAqdm1hOwo+Pj4gKwlwdGVfdCAqcHRlcDsKPj4+ICsJ c3BpbmxvY2tfdCAqcHRsOwo+Pgo+PiBXaXRoIGNoZWNrcGF0Y2gucGwgLS1zdHJpY3QgdGhlIGFi b3ZlIHlpZWxkcyBhIGNvbXBsYWluZWQKPj4gIkNIRUNLOiBzcGlubG9ja190IGRlZmluaXRpb24g d2l0aG91dCBjb21tZW50IiBidXQgSSB0aGluawo+PiB0aGF0J3MgcmVhbGx5IG9rYXkgc2luY2Ug eW91ciBjb21taXQgZGVzY3JpcHRpb24gaXMgdmVyeSBjbGVhci4KPj4gU2FtZSBvaW4gbGluZSAy NzcuCj4gCj4gSSB0aGluayB0aGlzIGlzIGEgZmFsbHMgcG9zaXRpdmUsIGNoZWNrcGF0Y2ggZG9l c24ndCByZWFsaXplIHRoYXQKPiBTWVNDQUxMX0RFRklORTMgaXMgYSBmdW5jdGlvbiwgbm90IGEg c3RydWN0dXJlLiBBbmQgaW4gYSBzdHJ1Y3R1cmUgSSdkCj4gaGF2ZSBhZGRlZCB0aGUga2VybmVs ZG9jIG9yIGNvbW1lbnQuCj4gCj4gSSdsbCBmaXggdXAgYWxsIHRoZSBuaXRzIHlvdSd2ZSBmb3Vu ZCBmb3IgdGhlIG5leHQgcm91bmQuIFRoYW5rcyBmb3IKPiB0YWtpbmcgYSBsb29rLgo+IC1EYW5p ZWwKPiAKCl9fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fCmxp bnV4LWFybS1rZXJuZWwgbWFpbGluZyBsaXN0CmxpbnV4LWFybS1rZXJuZWxAbGlzdHMuaW5mcmFk ZWFkLm9yZwpodHRwOi8vbGlzdHMuaW5mcmFkZWFkLm9yZy9tYWlsbWFuL2xpc3RpbmZvL2xpbnV4 LWFybS1rZXJuZWwK