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=-11.1 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, NICE_REPLY_A,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED, USER_AGENT_SANE_1 autolearn=unavailable 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 269CBC43457 for ; Tue, 13 Oct 2020 07:17:28 +0000 (UTC) Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (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 DE1632072D for ; Tue, 13 Oct 2020 07:17:27 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (2048-bit key) header.d=ibm.com header.i=@ibm.com header.b="lM6Lq1hx" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org DE1632072D 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=dri-devel-bounces@lists.freedesktop.org Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id BF62F6E8A7; Tue, 13 Oct 2020 07:17:14 +0000 (UTC) Received: from mx0a-001b2d01.pphosted.com (mx0b-001b2d01.pphosted.com [148.163.158.5]) by gabe.freedesktop.org (Postfix) with ESMTPS id 968D06E12D for ; Mon, 12 Oct 2020 14:03:43 +0000 (UTC) Received: from pps.filterd (m0098420.ppops.net [127.0.0.1]) by mx0b-001b2d01.pphosted.com (8.16.0.42/8.16.0.42) with SMTP id 09CE17Ne018109; Mon, 12 Oct 2020 10:03:35 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ibm.com; h=subject : to : cc : references : from : message-id : date : mime-version : in-reply-to : content-type : content-transfer-encoding; s=pp1; bh=9XZVPCzxR7io9Yrm5bz2pZhnBT0B6bmEzvhzPr5tu+k=; b=lM6Lq1hxDAVbJy/T/9DGSzvJGB/1tT6cuVQtMb6COlj6rIfR/a9hYwvFChI1USLqQirz fNaHBlYt4yxmdR2LZk39peXNUpw0iBDbS2UZObEvi5gEjbJqs4LA7VRt3BsrkBf5Pc4s FqlfeBb7+NH70qz1nKV2Wv+mO3iv3xvbzNrv1CT6KHgNV4sBVrNvkeS98IfstwwJ2okx stPGOZeyzURa8zgX/NVPdt35+W3+sskKlYR2sugwCuMGF1lj3qQdUtd3tHQRsM5sNWiu UHWKGlTA3uwkcS2SFZbM7C6UEDpnKqh4O4KG8y6hutCho2WBIMuPOydex3vIfRDRvSz9 WA== Received: from pps.reinject (localhost [127.0.0.1]) by mx0b-001b2d01.pphosted.com with ESMTP id 344qdaahcr-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Mon, 12 Oct 2020 10:03:35 -0400 Received: from m0098420.ppops.net (m0098420.ppops.net [127.0.0.1]) by pps.reinject (8.16.0.36/8.16.0.36) with SMTP id 09CE1ukg021820; Mon, 12 Oct 2020 10:03:34 -0400 Received: from ppma06fra.de.ibm.com (48.49.7a9f.ip4.static.sl-reverse.com [159.122.73.72]) by mx0b-001b2d01.pphosted.com with ESMTP id 344qdaahb8-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Mon, 12 Oct 2020 10:03:34 -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 09CE3Wk4004006; Mon, 12 Oct 2020 14:03:32 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 34347h12ug-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Mon, 12 Oct 2020 14:03:32 +0000 Received: from d06av24.portsmouth.uk.ibm.com (d06av24.portsmouth.uk.ibm.com [9.149.105.60]) by b06cxnps4074.portsmouth.uk.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id 09CE3TKb28115244 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Mon, 12 Oct 2020 14:03:29 GMT Received: from d06av24.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id BC61A42045; Mon, 12 Oct 2020 14:03:29 +0000 (GMT) Received: from d06av24.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id ECCA342042; Mon, 12 Oct 2020 14:03:28 +0000 (GMT) Received: from [9.145.9.103] (unknown [9.145.9.103]) by d06av24.portsmouth.uk.ibm.com (Postfix) with ESMTP; Mon, 12 Oct 2020 14:03:28 +0000 (GMT) Subject: Re: [PATCH v2 08/17] s390/pci: Remove races against pte updates To: Daniel Vetter , DRI Development , LKML References: <20201009075934.3509076-1-daniel.vetter@ffwll.ch> <20201009075934.3509076-9-daniel.vetter@ffwll.ch> From: Niklas Schnelle Message-ID: <6deb08dd-46f3-bf26-5362-fdc696f6fd74@linux.ibm.com> Date: Mon, 12 Oct 2020 16:03:28 +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: <20201009075934.3509076-9-daniel.vetter@ffwll.ch> Content-Language: en-US X-TM-AS-GCONF: 00 X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.235, 18.0.687 definitions=2020-10-12_09:2020-10-12, 2020-10-12 signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 lowpriorityscore=0 suspectscore=0 bulkscore=0 impostorscore=0 malwarescore=0 phishscore=0 adultscore=0 mlxlogscore=999 spamscore=0 clxscore=1011 priorityscore=1501 mlxscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2009150000 definitions=main-2010120109 X-Mailman-Approved-At: Tue, 13 Oct 2020 07:16:53 +0000 X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: linux-s390@vger.kernel.org, linux-samsung-soc@vger.kernel.org, Jan Kara , Kees Cook , kvm@vger.kernel.org, Jason Gunthorpe , John Hubbard , Andrew Morton , linux-mm@kvack.org, =?UTF-8?B?SsOpcsO0bWUgR2xpc3Nl?= , Daniel Vetter , Gerald Schaefer , Dan Williams , linux-arm-kernel@lists.infradead.org, linux-media@vger.kernel.org Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" SGkgRGFuaWVsLAoKZnJlc2hseSBiYWNrIGZyb20gbXkgdmFjYXRpb24gSSd2ZSBqdXN0IHRha2Vu IGEgbG9vayBhdCB5b3VyIHBhdGNoLgpGaXJzdCB0aGFua3MgZm9yIHRoaXMgZml4IGFuZCB0aGUg ZGV0YWlsZWQgY29tbWl0IGRlc2NyaXB0aW9uLgpEZWZpbml0ZWx5IG1ha2VzIHNlbnNlIHRvIGZp eCB0aGlzIGFuZCB5b3UgY2FuIGFkZCBteQoKQWNrZWQtYnk6IE5pa2xhcyBTY2huZWxsZSA8c2No bmVsbGVAbGludXguaWJtLmNvbT4KCkNvbnRlbnQgd2lzZSBpdCBhbGwgbG9va3Mgc2FuZSBhbmQg Y2xlYXIgYW5kIHNpbmNlIEdlcmFsZCBkaWQgdGhlIHRlc3RpbmcsCkkgd291bGQgaGF2ZSBhcHBs aWVkIGl0IHRvIG91ciB0cmVlIGFscmVhZHksIGJ1dCBJIGdvdCBzb21lIHRyaXZpYWwKY2hlY2tw YXRjaCB2aW9sYXRpb25zIHRoYXQgcHJvYmFibHkgYXBwbHkgdG8gdGhlIHdob2xlIHNlcmllcy4K SSd2ZSBjb21tZW50ZWQgdGhlbSBpbmxpbmUgYmVsb3cuCklmIHlvdSBjb25maXJtIHRoZXJlIEkg Y2FuIGRvIHRoZSBmaXh1cHMgd2hlbiBhcHBseWluZyBvciB5b3UgY2FuIHJlc2VuZC4KCk9uIDEw LzkvMjAgOTo1OSBBTSwgRGFuaWVsIFZldHRlciB3cm90ZToKPiBXYXkgYmFjayBpdCB3YXMgYSBy ZWFzb25hYmxlIGFzc3VtcHRpb25zIHRoYXQgaW9tZW0gbWFwcGluZ3MgbmV2ZXIKPiBjaGFuZ2Ug dGhlIHBmbiByYW5nZSB0aGV5IHBvaW50IGF0LiBCdXQgdGhpcyBoYXMgY2hhbmdlZDoKPiAKPiAt IGdwdSBkcml2ZXJzIGR5bmFtaWNhbGx5IG1hbmFnZSB0aGVpciBtZW1vcnkgbm93YWRheXMsIGlu dmFsaWRhdGluZwo+IHB0ZXMgd2l0aCB1bm1hcF9tYXBwaW5nX3JhbmdlIHdoZW4gYnVmZmVycyBn ZXQgbW92ZWQKPiAKPiAtIGNvbnRpZ3VvdXMgZG1hIGFsbG9jYXRpb25zIGhhdmUgbW92ZWQgZnJv bSBkZWRpY2F0ZWQgY2FydmV0b3V0cyB0bwo+IGNtYSByZWdpb25zLiBUaGlzIG1lYW5zIGlmIHdl IG1pc3MgdGhlIHVubWFwIHRoZSBwZm4gbWlnaHQgY29udGFpbgo+IHBhZ2VjYWNoZSBvciBhbm9u IG1lbW9yeSAod2VsbCBhbnl0aGluZyBhbGxvY2F0ZWQgd2l0aCBHRlBfTU9WRUFCTEUpCj4gCj4g LSBldmVuIC9kZXYvbWVtIG5vdyBpbnZhbGlkYXRlcyBtYXBwaW5ncyB3aGVuIHRoZSBrZXJuZWwg cmVxdWVzdHMgdGhhdAo+IGlvbWVtIHJlZ2lvbiB3aGVuIENPTkZJR19JT19TVFJJQ1RfREVWTUVN IGlzIHNldCwgc2VlIDMyMzRhYzY2NGE4NwoKVGhlIGFib3ZlIGNvbW1pdCBtZW50aW9uIHNob3Vs ZCB1c2UgdGhlIGZvcm1hdAonY29tbWl0IDMyMzRhYzY2NGE4NyAoIi9kZXYvbWVtOiBSZXZva2Ug bWFwcGluZ3Mgd2hlbiBhIGRyaXZlciBjbGFpbXMgdGhlIHJlZ2lvbiIpJwpvdGhlcndpc2UgdGhp cyByZXN1bHRzIGluIGEgY2hlY2twYXRjaCBFUlJPUi4KCj4gKCIvZGV2L21lbTogUmV2b2tlIG1h cHBpbmdzIHdoZW4gYSBkcml2ZXIgY2xhaW1zIHRoZSByZWdpb24iKQo+IAo+IEFjY2Vzc2luZyBw Zm5zIG9idGFpbmVkIGZyb20gcHRlcyB3aXRob3V0IGhvbGRpbmcgYWxsIHRoZSBsb2NrcyBpcwo+ IHRoZXJlZm9yZSBubyBsb25nZXIgYSBnb29kIGlkZWEuIEZpeCB0aGlzLgo+IAo+IFNpbmNlIHpw Y2lfbWVtY3B5X2Zyb218dG9pbyBzZWVtcyB0byBub3QgZG8gYW55dGhpbmcgbmVmYXJpb3VzIHdp dGgKPiBsb2NrcyB3ZSBqdXN0IG5lZWQgdG8gb3BlbiBjb2RlIGdldF9wZm4gYW5kIGZvbGxvd19w Zm4gYW5kIG1ha2Ugc3VyZQo+IHdlIGRyb3AgdGhlIGxvY2tzIG9ubHkgYWZ0ZXIgd2UndmUgZG9u ZS4gVGhlIHdyaXRlIGZ1bmN0aW9uIGFsc28gbmVlZHMKCmp1c3QgYSB0eXBvIGJ1dCBqdXN0IHNh dyBpdCAid2UncmUiIGluc3RlYWQgb2YgIndlJ3ZlIgoKPiB0aGUgY29weV9mcm9tX3VzZXIgbW92 ZSwgc2luY2Ugd2UgY2FuJ3QgdGFrZSB1c2Vyc3BhY2UgZmF1bHRzIHdoaWxlCj4gaG9sZGluZyB0 aGUgbW1hcCBzZW0uCj4gCj4gUmV2aWV3ZWQtYnk6IEdlcmFsZCBTY2hhZWZlciA8Z2VyYWxkLnNj aGFlZmVyQGxpbnV4LmlibS5jb20+Cj4gCk5vIGVtcHR5IGxpbmUgYWZ0ZXIgdGhlIFJldmllZC1i eSB0YWcuCgo+IFNpZ25lZC1vZmYtYnk6IERhbmllbCBWZXR0ZXIgPGRhbmllbC52ZXR0ZXJAaW50 ZWwuY29tPgoKWW91ciBTaWduZWQtb2ZmLWJ5IG1haWwgYWRkcmVzcyBkb2VzIG5vdCBtYXRjaCB0 aGUgb25lIHlvdSdyZSBzZW5kaW5nIGZyb20sCnRoaXMgeWllbGRzIGEgY2hlY2twYXRjaCB3YXJu aW5nIHdoZW4gdXNpbmcgZ2l0IGFtIHdpdGggeW91ciBtYWlsLgpUaGlzIGlzIHByb2JhYmx5IGp1 c3QgYSBzaWxseSBtaXNjb25maWd1cmF0aW9uIGJ1dCBzaW5jZSBTaWduZWQtb2ZmcwphcmUgc2ln bmF0dXJlcyBzaG91bGQgSSBjaGFuZ2UgdGhpcyB0byAKIkRhbmllbCBWZXR0ZXIgPGRhbmllbC52 ZXR0ZXJAZmZ3bGwuY2g+IiB3aGljaCBpcyB0aGUgb25lIHlvdSdyZQpzZW5kaW5nIGZyb20gYW5k IGFsc28gaW4gdGhlIE1BSU5UQUlORVJTIGZpbGU/CgoKPiBDYzogSmFzb24gR3VudGhvcnBlIDxq Z2dAemllcGUuY2E+Cj4gQ2M6IERhbiBXaWxsaWFtcyA8ZGFuLmoud2lsbGlhbXNAaW50ZWwuY29t Pgo+IENjOiBLZWVzIENvb2sgPGtlZXNjb29rQGNocm9taXVtLm9yZz4KPiBDYzogQW5kcmV3IE1v cnRvbiA8YWtwbUBsaW51eC1mb3VuZGF0aW9uLm9yZz4KPiBDYzogSm9obiBIdWJiYXJkIDxqaHVi YmFyZEBudmlkaWEuY29tPgo+IENjOiBKw6lyw7RtZSBHbGlzc2UgPGpnbGlzc2VAcmVkaGF0LmNv bT4KPiBDYzogSmFuIEthcmEgPGphY2tAc3VzZS5jej4KPiBDYzogRGFuIFdpbGxpYW1zIDxkYW4u ai53aWxsaWFtc0BpbnRlbC5jb20+CgpUaGUgYWJvdmUgQ2M6IGxpbmUgZm9yIERhbiBXaWxsaWFt cyBpcyBhIGR1cGxpY2F0ZQoKPiBDYzogbGludXgtbW1Aa3ZhY2sub3JnCj4gQ2M6IGxpbnV4LWFy bS1rZXJuZWxAbGlzdHMuaW5mcmFkZWFkLm9yZwo+IENjOiBsaW51eC1zYW1zdW5nLXNvY0B2Z2Vy Lmtlcm5lbC5vcmcKPiBDYzogbGludXgtbWVkaWFAdmdlci5rZXJuZWwub3JnCj4gQ2M6IE5pa2xh cyBTY2huZWxsZSA8c2NobmVsbGVAbGludXguaWJtLmNvbT4KPiBDYzogR2VyYWxkIFNjaGFlZmVy IDxnZXJhbGQuc2NoYWVmZXJAbGludXguaWJtLmNvbT4KPiBDYzogbGludXgtczM5MEB2Z2VyLmtl cm5lbC5vcmcKPiAtLQo+IHYyOiBNb3ZlIFZNX0lPIHwgVk1fUEZOTUFQIGNoZWNrcyBhcm91bmQg c28gdGhleSBrZWVwIHJldHVybmluZyBFSU5WQUwKPiBsaWtlIGJlZm9yZSAoR2VyYXJkKQoKSSB0 aGluayB0aGUgYWJvdmUgc2hvdWxkIGdvIGJlZm9yZSB0aGUgQ0MvU2lnbmVkLW9mZi9SZXZpZXdl diBibG9jay4KCj4gLS0tCj4gIGFyY2gvczM5MC9wY2kvcGNpX21taW8uYyB8IDk4ICsrKysrKysr KysrKysrKysrKysrKysrLS0tLS0tLS0tLS0tLS0tLS0KPiAgMSBmaWxlIGNoYW5nZWQsIDU3IGlu c2VydGlvbnMoKyksIDQxIGRlbGV0aW9ucygtKQo+IAo+IGRpZmYgLS1naXQgYS9hcmNoL3MzOTAv cGNpL3BjaV9tbWlvLmMgYi9hcmNoL3MzOTAvcGNpL3BjaV9tbWlvLmMKPiBpbmRleCA0MDFjZjY3 MGEyNDMuLjFhNmFkYmM2OGVlOCAxMDA2NDQKPiAtLS0gYS9hcmNoL3MzOTAvcGNpL3BjaV9tbWlv LmMKPiArKysgYi9hcmNoL3MzOTAvcGNpL3BjaV9tbWlvLmMKPiBAQCAtMTE5LDMzICsxMTksMTUg QEAgc3RhdGljIGlubGluZSBpbnQgX19tZW1jcHlfdG9pb19pbnVzZXIodm9pZCBfX2lvbWVtICpk c3QsCj4gIAlyZXR1cm4gcmM7Cj4gIH0KPiAgCj4gLXN0YXRpYyBsb25nIGdldF9wZm4odW5zaWdu ZWQgbG9uZyB1c2VyX2FkZHIsIHVuc2lnbmVkIGxvbmcgYWNjZXNzLAo+IC0JCSAgICB1bnNpZ25l ZCBsb25nICpwZm4pCj4gLXsKPiAtCXN0cnVjdCB2bV9hcmVhX3N0cnVjdCAqdm1hOwo+IC0JbG9u ZyByZXQ7Cj4gLQo+IC0JbW1hcF9yZWFkX2xvY2soY3VycmVudC0+bW0pOwo+IC0JcmV0ID0gLUVJ TlZBTDsKPiAtCXZtYSA9IGZpbmRfdm1hKGN1cnJlbnQtPm1tLCB1c2VyX2FkZHIpOwo+IC0JaWYg KCF2bWEpCj4gLQkJZ290byBvdXQ7Cj4gLQlyZXQgPSAtRUFDQ0VTOwo+IC0JaWYgKCEodm1hLT52 bV9mbGFncyAmIGFjY2VzcykpCj4gLQkJZ290byBvdXQ7Cj4gLQlyZXQgPSBmb2xsb3dfcGZuKHZt YSwgdXNlcl9hZGRyLCBwZm4pOwo+IC1vdXQ6Cj4gLQltbWFwX3JlYWRfdW5sb2NrKGN1cnJlbnQt Pm1tKTsKPiAtCXJldHVybiByZXQ7Cj4gLX0KPiAtCj4gIFNZU0NBTExfREVGSU5FMyhzMzkwX3Bj aV9tbWlvX3dyaXRlLCB1bnNpZ25lZCBsb25nLCBtbWlvX2FkZHIsCj4gIAkJY29uc3Qgdm9pZCBf X3VzZXIgKiwgdXNlcl9idWZmZXIsIHNpemVfdCwgbGVuZ3RoKQo+ICB7Cj4gIAl1OCBsb2NhbF9i dWZbNjRdOwo+ICAJdm9pZCBfX2lvbWVtICppb19hZGRyOwo+ICAJdm9pZCAqYnVmOwo+IC0JdW5z aWduZWQgbG9uZyBwZm47Cj4gKwlzdHJ1Y3Qgdm1fYXJlYV9zdHJ1Y3QgKnZtYTsKPiArCXB0ZV90 ICpwdGVwOwo+ICsJc3BpbmxvY2tfdCAqcHRsOwoKV2l0aCBjaGVja3BhdGNoLnBsIC0tc3RyaWN0 IHRoZSBhYm92ZSB5aWVsZHMgYSBjb21wbGFpbmVkCiJDSEVDSzogc3BpbmxvY2tfdCBkZWZpbml0 aW9uIHdpdGhvdXQgY29tbWVudCIgYnV0IEkgdGhpbmsKdGhhdCdzIHJlYWxseSBva2F5IHNpbmNl IHlvdXIgY29tbWl0IGRlc2NyaXB0aW9uIGlzIHZlcnkgY2xlYXIuClNhbWUgb2luIGxpbmUgMjc3 LgoKLi4uIHNuaXAgLi4uCl9fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19f X19fX19fCmRyaS1kZXZlbCBtYWlsaW5nIGxpc3QKZHJpLWRldmVsQGxpc3RzLmZyZWVkZXNrdG9w Lm9yZwpodHRwczovL2xpc3RzLmZyZWVkZXNrdG9wLm9yZy9tYWlsbWFuL2xpc3RpbmZvL2RyaS1k ZXZlbAo=