[{"id":1776504,"web_url":"http://patchwork.ozlabs.org/comment/1776504/","msgid":"<6d86db3a-33ef-e155-2f96-76cf15dd1220@linaro.org>","list_archive_url":null,"date":"2017-09-27T17:52:29","subject":"Re: [Qemu-devel] [PATCH RFC 3/3] s390x/tcg: make STFL store into\n\tthe lowcore","submitter":{"id":72104,"url":"http://patchwork.ozlabs.org/api/people/72104/","name":"Richard Henderson","email":"richard.henderson@linaro.org"},"content":"On 09/27/2017 10:00 AM, David Hildenbrand wrote:\n> Using virtual memory access is wrong and will soon include low-address\n> protection checks, which is to be bypassed for STFL.\n> \n> This was originally part of a bigger STFL(E) refactoring.\n> \n> Signed-off-by: David Hildenbrand \n> ---\n> target/s390x/helper.h | 2 +-\n> target/s390x/misc_helper.c | 7 ++++++-\n> 2 files changed, 7 insertions(+), 2 deletions(-)\n\nNeed to sort this patch first, so that the series is bisectable.\n\n> DEF_HELPER_FLAGS_2(sfpc, TCG_CALL_NO_RWG, void, env, i64)\n> DEF_HELPER_FLAGS_2(sfas, TCG_CALL_NO_WG, void, env, i64)\n> DEF_HELPER_FLAGS_1(popcnt, TCG_CALL_NO_RWG_SE, i64, i64)\n> -DEF_HELPER_FLAGS_1(stfl, TCG_CALL_NO_RWG, void, env)\n> DEF_HELPER_2(stfle, i32, env, i64)\n> DEF_HELPER_FLAGS_2(lpq, TCG_CALL_NO_WG, i64, env, i64)\n> DEF_HELPER_FLAGS_4(stpq, TCG_CALL_NO_WG, void, env, i64, i64, i64)\n> @@ -153,6 +152,7 @@ DEF_HELPER_FLAGS_3(sturg, TCG_CALL_NO_WG, void, env, i64, i64)\n> DEF_HELPER_1(per_check_exception, void, env)\n> DEF_HELPER_FLAGS_3(per_branch, TCG_CALL_NO_RWG, void, env, i64, i64)\n> DEF_HELPER_FLAGS_2(per_ifetch, TCG_CALL_NO_RWG, void, env, i64)\n> +DEF_HELPER_FLAGS_1(stfl, TCG_CALL_NO_RWG, void, env)\n> \n\nWhy? Otherwise,\n\nReviewed-by: Richard Henderson \n\n\nr~","headers":{"Return-Path":"","X-Original-To":"incoming@patchwork.ozlabs.org","Delivered-To":"patchwork-incoming@bilbo.ozlabs.org","Authentication-Results":["ozlabs.org;\n\tspf=pass (mailfrom) smtp.mailfrom=nongnu.org\n\t(client-ip=2001:4830:134:3::11; helo=lists.gnu.org;\n\tenvelope-from=qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org;\n\treceiver=)","ozlabs.org;\n\tdkim=fail reason=\"signature verification failed\" (1024-bit key;\n\tunprotected) header.d=linaro.org header.i=@linaro.org\n\theader.b=\"Jc0w2eiJ\"; dkim-atps=neutral"],"Received":["from lists.gnu.org (lists.gnu.org [IPv6:2001:4830:134:3::11])\n\t(using TLSv1 with cipher AES256-SHA (256/256 bits))\n\t(No client certificate requested)\n\tby ozlabs.org (Postfix) with ESMTPS id 3y2QQj4rChz9tY2\n\tfor ;\n\tThu, 28 Sep 2017 03:52:57 +1000 (AEST)","from localhost ([::1]:55796 helo=lists.gnu.org)\n\tby lists.gnu.org with esmtp (Exim 4.71) (envelope-from\n\t)\n\tid 1dxGVy-0005EF-N6\n\tfor incoming@patchwork.ozlabs.org; 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\n\tWed, 27 Sep 2017 10:52:32 -0700 (PDT)","To":"David Hildenbrand , qemu-devel@nongnu.org","References":"<20170927170027.8539-1-david@redhat.com>\n\t<20170927170027.8539-4-david@redhat.com>","From":"Richard Henderson ","Message-ID":"<6d86db3a-33ef-e155-2f96-76cf15dd1220@linaro.org>","Date":"Wed, 27 Sep 2017 10:52:29 -0700","User-Agent":"Mozilla/5.0 (X11; Linux x86_64; rv:52.0) Gecko/20100101\n\tThunderbird/52.3.0","MIME-Version":"1.0","In-Reply-To":"<20170927170027.8539-4-david@redhat.com>","Content-Type":"text/plain; charset=utf-8","Content-Language":"en-US","Content-Transfer-Encoding":"7bit","X-detected-operating-system":"by eggs.gnu.org: Genre and OS details not\n\trecognized.","X-Received-From":"2607:f8b0:400e:c00::232","Subject":"Re: [Qemu-devel] [PATCH RFC 3/3] s390x/tcg: make STFL store into\n\tthe lowcore","X-BeenThere":"qemu-devel@nongnu.org","X-Mailman-Version":"2.1.21","Precedence":"list","List-Id":"","List-Unsubscribe":",\n\t","List-Archive":"","List-Post":"","List-Help":"","List-Subscribe":",\n\t","Cc":"Christian Borntraeger , thuth@redhat.com,\n\tcohuck@redhat.com, Alexander Graf ","Errors-To":"qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org","Sender":"\"Qemu-devel\"\n\t"}},{"id":1776537,"web_url":"http://patchwork.ozlabs.org/comment/1776537/","msgid":"<9d535e6d-6e22-dc7f-2ce8-b2a542935f58@redhat.com>","list_archive_url":null,"date":"2017-09-27T18:46:51","subject":"Re: [Qemu-devel] [PATCH RFC 3/3] s390x/tcg: make STFL store into\n\tthe lowcore","submitter":{"id":70402,"url":"http://patchwork.ozlabs.org/api/people/70402/","name":"David Hildenbrand","email":"david@redhat.com"},"content":"On 27.09.2017 19:52, Richard Henderson wrote:\n> On 09/27/2017 10:00 AM, David Hildenbrand wrote:\n>> Using virtual memory access is wrong and will soon include low-address\n>> protection checks, which is to be bypassed for STFL.\n>>\n>> This was originally part of a bigger STFL(E) refactoring.\n>>\n>> Signed-off-by: David Hildenbrand \n>> ---\n>> target/s390x/helper.h | 2 +-\n>> target/s390x/misc_helper.c | 7 ++++++-\n>> 2 files changed, 7 insertions(+), 2 deletions(-)\n> \n> Need to sort this patch first, so that the series is bisectable.\n\nRight, this should become #2.\n\n> \n>> DEF_HELPER_FLAGS_2(sfpc, TCG_CALL_NO_RWG, void, env, i64)\n>> DEF_HELPER_FLAGS_2(sfas, TCG_CALL_NO_WG, void, env, i64)\n>> DEF_HELPER_FLAGS_1(popcnt, TCG_CALL_NO_RWG_SE, i64, i64)\n>> -DEF_HELPER_FLAGS_1(stfl, TCG_CALL_NO_RWG, void, env)\n>> DEF_HELPER_2(stfle, i32, env, i64)\n>> DEF_HELPER_FLAGS_2(lpq, TCG_CALL_NO_WG, i64, env, i64)\n>> DEF_HELPER_FLAGS_4(stpq, TCG_CALL_NO_WG, void, env, i64, i64, i64)\n>> @@ -153,6 +152,7 @@ DEF_HELPER_FLAGS_3(sturg, TCG_CALL_NO_WG, void, env, i64, i64)\n>> DEF_HELPER_1(per_check_exception, void, env)\n>> DEF_HELPER_FLAGS_3(per_branch, TCG_CALL_NO_RWG, void, env, i64, i64)\n>> DEF_HELPER_FLAGS_2(per_ifetch, TCG_CALL_NO_RWG, void, env, i64)\n>> +DEF_HELPER_FLAGS_1(stfl, TCG_CALL_NO_RWG, void, env)\n>> \n> \n> Why? Otherwise,\n\nstruct LowCore is only available for !CONFIG_USER_ONLY. Therefore I also\nhave to move the helper declaration into !CONFIG_USER_ONLY.\n\nThanks!\n\n> \n> Reviewed-by: Richard Henderson \n> \n> \n> r~\n>","headers":{"Return-Path":"","X-Original-To":"incoming@patchwork.ozlabs.org","Delivered-To":"patchwork-incoming@bilbo.ozlabs.org","Authentication-Results":["ozlabs.org;\n\tspf=pass (mailfrom) smtp.mailfrom=nongnu.org\n\t(client-ip=2001:4830:134:3::11; helo=lists.gnu.org;\n\tenvelope-from=qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org;\n\treceiver=)","ext-mx07.extmail.prod.ext.phx2.redhat.com;\n\tdmarc=none (p=none dis=none) header.from=redhat.com","ext-mx07.extmail.prod.ext.phx2.redhat.com;\n\tspf=fail smtp.mailfrom=david@redhat.com"],"Received":["from lists.gnu.org (lists.gnu.org [IPv6:2001:4830:134:3::11])\n\t(using TLSv1 with cipher AES256-SHA (256/256 bits))\n\t(No client certificate requested)\n\tby ozlabs.org (Postfix) with ESMTPS id 3y2RdS1SnXz9tXb\n\tfor ;\n\tThu, 28 Sep 2017 04:47:22 +1000 (AEST)","from localhost ([::1]:55943 helo=lists.gnu.org)\n\tby lists.gnu.org with esmtp (Exim 4.71) (envelope-from\n\t)\n\tid 1dxHMe-00061I-5V\n\tfor incoming@patchwork.ozlabs.org; Wed, 27 Sep 2017 14:47:20 -0400","from eggs.gnu.org ([2001:4830:134:3::10]:56265)\n\tby lists.gnu.org with esmtp (Exim 4.71)\n\t(envelope-from ) id 1dxHMK-00060z-Nc\n\tfor qemu-devel@nongnu.org; Wed, 27 Sep 2017 14:47:01 -0400","from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71)\n\t(envelope-from ) id 1dxHMF-00016P-W3\n\tfor qemu-devel@nongnu.org; Wed, 27 Sep 2017 14:47:00 -0400","from mx1.redhat.com ([209.132.183.28]:36826)\n\tby eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32)\n\t(Exim 4.71) (envelope-from ) id 1dxHMF-00015G-PN\n\tfor qemu-devel@nongnu.org; Wed, 27 Sep 2017 14:46:55 -0400","from smtp.corp.redhat.com\n\t(int-mx02.intmail.prod.int.phx2.redhat.com [10.5.11.12])\n\t(using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits))\n\t(No client certificate requested)\n\tby mx1.redhat.com (Postfix) with ESMTPS id 9B145C1E5D84;\n\tWed, 27 Sep 2017 18:46:54 +0000 (UTC)","from [10.36.116.69] (ovpn-116-69.ams2.redhat.com [10.36.116.69])\n\tby smtp.corp.redhat.com (Postfix) with ESMTP id 1376960E37;\n\tWed, 27 Sep 2017 18:46:52 +0000 (UTC)"],"DMARC-Filter":"OpenDMARC Filter v1.3.2 mx1.redhat.com 9B145C1E5D84","To":"Richard Henderson , qemu-devel@nongnu.org","References":"<20170927170027.8539-1-david@redhat.com>\n\t<20170927170027.8539-4-david@redhat.com>\n\t<6d86db3a-33ef-e155-2f96-76cf15dd1220@linaro.org>","From":"David Hildenbrand ","Organization":"Red Hat GmbH","Message-ID":"<9d535e6d-6e22-dc7f-2ce8-b2a542935f58@redhat.com>","Date":"Wed, 27 Sep 2017 20:46:51 +0200","User-Agent":"Mozilla/5.0 (X11; Linux x86_64; rv:52.0) Gecko/20100101\n\tThunderbird/52.3.0","MIME-Version":"1.0","In-Reply-To":"<6d86db3a-33ef-e155-2f96-76cf15dd1220@linaro.org>","Content-Type":"text/plain; charset=utf-8","Content-Language":"en-US","Content-Transfer-Encoding":"7bit","X-Scanned-By":"MIMEDefang 2.79 on 10.5.11.12","X-Greylist":"Sender IP whitelisted, not delayed by milter-greylist-4.5.16\n\t(mx1.redhat.com [10.5.110.31]);\n\tWed, 27 Sep 2017 18:46:54 +0000 (UTC)","X-detected-operating-system":"by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic]\n\t[fuzzy]","X-Received-From":"209.132.183.28","Subject":"Re: [Qemu-devel] [PATCH RFC 3/3] s390x/tcg: make STFL store into\n\tthe lowcore","X-BeenThere":"qemu-devel@nongnu.org","X-Mailman-Version":"2.1.21","Precedence":"list","List-Id":"","List-Unsubscribe":",\n\t","List-Archive":"","List-Post":"","List-Help":"","List-Subscribe":",\n\t","Cc":"Christian Borntraeger , thuth@redhat.com,\n\tcohuck@redhat.com, Alexander Graf ","Errors-To":"qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org","Sender":"\"Qemu-devel\"\n\t"}},{"id":1776744,"web_url":"http://patchwork.ozlabs.org/comment/1776744/","msgid":"","list_archive_url":null,"date":"2017-09-28T04:23:55","subject":"Re: [Qemu-devel] [PATCH RFC 3/3] s390x/tcg: make STFL store into\n\tthe lowcore","submitter":{"id":66152,"url":"http://patchwork.ozlabs.org/api/people/66152/","name":"Thomas Huth","email":"thuth@redhat.com"},"content":"On 27.09.2017 20:46, David Hildenbrand wrote:\n> On 27.09.2017 19:52, Richard Henderson wrote:\n>> On 09/27/2017 10:00 AM, David Hildenbrand wrote:\n>>> Using virtual memory access is wrong and will soon include low-address\n>>> protection checks, which is to be bypassed for STFL.\n>>>\n>>> This was originally part of a bigger STFL(E) refactoring.\n>>>\n>>> Signed-off-by: David Hildenbrand \n>>> ---\n>>> target/s390x/helper.h | 2 +-\n>>> target/s390x/misc_helper.c | 7 ++++++-\n>>> 2 files changed, 7 insertions(+), 2 deletions(-)\n>>\n>> Need to sort this patch first, so that the series is bisectable.\n> \n> Right, this should become #2.\n> \n>>\n>>> DEF_HELPER_FLAGS_2(sfpc, TCG_CALL_NO_RWG, void, env, i64)\n>>> DEF_HELPER_FLAGS_2(sfas, TCG_CALL_NO_WG, void, env, i64)\n>>> DEF_HELPER_FLAGS_1(popcnt, TCG_CALL_NO_RWG_SE, i64, i64)\n>>> -DEF_HELPER_FLAGS_1(stfl, TCG_CALL_NO_RWG, void, env)\n>>> DEF_HELPER_2(stfle, i32, env, i64)\n>>> DEF_HELPER_FLAGS_2(lpq, TCG_CALL_NO_WG, i64, env, i64)\n>>> DEF_HELPER_FLAGS_4(stpq, TCG_CALL_NO_WG, void, env, i64, i64, i64)\n>>> @@ -153,6 +152,7 @@ DEF_HELPER_FLAGS_3(sturg, TCG_CALL_NO_WG, void, env, i64, i64)\n>>> DEF_HELPER_1(per_check_exception, void, env)\n>>> DEF_HELPER_FLAGS_3(per_branch, TCG_CALL_NO_RWG, void, env, i64, i64)\n>>> DEF_HELPER_FLAGS_2(per_ifetch, TCG_CALL_NO_RWG, void, env, i64)\n>>> +DEF_HELPER_FLAGS_1(stfl, TCG_CALL_NO_RWG, void, env)\n>>> \n>>\n>> Why? Otherwise,\n> \n> struct LowCore is only available for !CONFIG_USER_ONLY. Therefore I also\n> have to move the helper declaration into !CONFIG_USER_ONLY.\n\nYou should mention that in the patch description, that it is a\nprivileged instruction and thus you also mark it here accordingly.\n\nWith that update:\n\nReviewed-by: Thomas Huth ","headers":{"Return-Path":"","X-Original-To":"incoming@patchwork.ozlabs.org","Delivered-To":"patchwork-incoming@bilbo.ozlabs.org","Authentication-Results":["ozlabs.org;\n\tspf=pass (mailfrom) smtp.mailfrom=nongnu.org\n\t(client-ip=2001:4830:134:3::11; helo=lists.gnu.org;\n\tenvelope-from=qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org;\n\treceiver=)","ext-mx08.extmail.prod.ext.phx2.redhat.com;\n\tdmarc=none (p=none dis=none) header.from=redhat.com","ext-mx08.extmail.prod.ext.phx2.redhat.com;\n\tspf=fail smtp.mailfrom=thuth@redhat.com"],"Received":["from lists.gnu.org (lists.gnu.org [IPv6:2001:4830:134:3::11])\n\t(using TLSv1 with cipher AES256-SHA (256/256 bits))\n\t(No client certificate requested)\n\tby ozlabs.org (Postfix) with ESMTPS id 3y2hRL1Nq9z9s9Y\n\tfor ;\n\tThu, 28 Sep 2017 14:24:29 +1000 (AEST)","from localhost ([::1]:57323 helo=lists.gnu.org)\n\tby lists.gnu.org with esmtp (Exim 4.71) (envelope-from\n\t)\n\tid 1dxQN8-0006ES-Fn\n\tfor incoming@patchwork.ozlabs.org; Thu, 28 Sep 2017 00:24:26 -0400","from eggs.gnu.org ([2001:4830:134:3::10]:56230)\n\tby lists.gnu.org with esmtp (Exim 4.71)\n\t(envelope-from ) id 1dxQMn-0006Be-DV\n\tfor qemu-devel@nongnu.org; Thu, 28 Sep 2017 00:24:06 -0400","from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71)\n\t(envelope-from ) id 1dxQMk-0000Ex-8g\n\tfor qemu-devel@nongnu.org; Thu, 28 Sep 2017 00:24:05 -0400","from mx1.redhat.com ([209.132.183.28]:47470)\n\tby eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32)\n\t(Exim 4.71) (envelope-from ) id 1dxQMk-0000Em-1t\n\tfor qemu-devel@nongnu.org; Thu, 28 Sep 2017 00:24:02 -0400","from smtp.corp.redhat.com\n\t(int-mx03.intmail.prod.int.phx2.redhat.com [10.5.11.13])\n\t(using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits))\n\t(No client certificate requested)\n\tby mx1.redhat.com (Postfix) with ESMTPS id D4457C10D428;\n\tThu, 28 Sep 2017 04:24:00 +0000 (UTC)","from [10.36.116.86] (ovpn-116-86.ams2.redhat.com [10.36.116.86])\n\tby smtp.corp.redhat.com (Postfix) with ESMTPS id 6666485A38;\n\tThu, 28 Sep 2017 04:23:57 +0000 (UTC)"],"DMARC-Filter":"OpenDMARC Filter v1.3.2 mx1.redhat.com D4457C10D428","To":"David Hildenbrand ,\n\tRichard Henderson , qemu-devel@nongnu.org","References":"<20170927170027.8539-1-david@redhat.com>\n\t<20170927170027.8539-4-david@redhat.com>\n\t<6d86db3a-33ef-e155-2f96-76cf15dd1220@linaro.org>\n\t<9d535e6d-6e22-dc7f-2ce8-b2a542935f58@redhat.com>","From":"Thomas Huth ","Message-ID":"","Date":"Thu, 28 Sep 2017 06:23:55 +0200","User-Agent":"Mozilla/5.0 (X11; Linux x86_64; rv:52.0) Gecko/20100101\n\tThunderbird/52.3.0","MIME-Version":"1.0","In-Reply-To":"<9d535e6d-6e22-dc7f-2ce8-b2a542935f58@redhat.com>","Content-Type":"text/plain; charset=utf-8","Content-Language":"en-US","Content-Transfer-Encoding":"7bit","X-Scanned-By":"MIMEDefang 2.79 on 10.5.11.13","X-Greylist":"Sender IP whitelisted, not delayed by milter-greylist-4.5.16\n\t(mx1.redhat.com [10.5.110.32]);\n\tThu, 28 Sep 2017 04:24:01 +0000 (UTC)","X-detected-operating-system":"by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic]\n\t[fuzzy]","X-Received-From":"209.132.183.28","Subject":"Re: [Qemu-devel] [PATCH RFC 3/3] s390x/tcg: make STFL store into\n\tthe lowcore","X-BeenThere":"qemu-devel@nongnu.org","X-Mailman-Version":"2.1.21","Precedence":"list","List-Id":"","List-Unsubscribe":",\n\t","List-Archive":"","List-Post":"","List-Help":"","List-Subscribe":",\n\t","Cc":"Christian Borntraeger , cohuck@redhat.com,\n\tAlexander Graf ","Errors-To":"qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org","Sender":"\"Qemu-devel\"\n\t"}}]