[{"id":1774630,"web_url":"http://patchwork.ozlabs.org/comment/1774630/","msgid":"","list_archive_url":null,"date":"2017-09-25T10:22:56","subject":"Re: [Qemu-devel] [PATCH v1 09/27] target/s390x: factor out handling\n\tof WAIT PSW into handle_wait()","submitter":{"id":66152,"url":"http://patchwork.ozlabs.org/api/people/66152/","name":"Thomas Huth","email":"thuth@redhat.com"},"content":"On 18.09.2017 17:59, David Hildenbrand wrote:\n> This will now also detect crashes under TCG. We can directly use\n> cpu->env.psw.addr instead of kvm_run, as we do a\n> cpu_synchronize_state().\n> \n> Signed-off-by: David Hildenbrand \n> ---\n> target/s390x/helper.c | 28 ++++++++++++++++++++++------\n> target/s390x/internal.h | 1 +\n> target/s390x/kvm.c | 15 +--------------\n> 3 files changed, 24 insertions(+), 20 deletions(-)\n> \n> diff --git a/target/s390x/helper.c b/target/s390x/helper.c\n> index e22b93258b..75ceb0bf2b 100644\n> --- a/target/s390x/helper.c\n> +++ b/target/s390x/helper.c\n> @@ -26,6 +26,7 @@\n> #include \"qemu/timer.h\"\n> #include \"exec/exec-all.h\"\n> #include \"hw/s390x/ioinst.h\"\n> +#include \"sysemu/hw_accel.h\"\n> #ifndef CONFIG_USER_ONLY\n> #include \"sysemu/sysemu.h\"\n> #endif\n> @@ -113,6 +114,26 @@ hwaddr s390_cpu_get_phys_addr_debug(CPUState *cs, vaddr vaddr)\n> return phys_addr;\n> }\n> \n> +static inline bool is_special_wait_psw(uint64_t psw_addr)\n> +{\n> + /* signal quiesce */\n> + return psw_addr == 0xfffUL;\n> +}\n> +\n> +void handle_wait(S390CPU *cpu)\n\n\"handle_wait\" is a very generic name ... could you maybe at least name\nthis \"s390x_handle_wait\" or so?\n\n> +{\n> + cpu_synchronize_state(CPU(cpu));\n> + if (s390_cpu_halt(cpu) == 0) {\n> +#ifndef CONFIG_USER_ONLY\n> + if (is_special_wait_psw(cpu->env.psw.addr)) {\n> + qemu_system_shutdown_request(SHUTDOWN_CAUSE_GUEST_SHUTDOWN);\n> + } else {\n> + qemu_system_guest_panicked(NULL);\n> + }\n> +#endif\n> + }\n> +}\n> +\n> void load_psw(CPUS390XState *env, uint64_t mask, uint64_t addr)\n> {\n> uint64_t old_mask = env->psw.mask;\n> @@ -128,12 +149,7 @@ void load_psw(CPUS390XState *env, uint64_t mask, uint64_t addr)\n> }\n> \n> if (mask & PSW_MASK_WAIT) {\n> - S390CPU *cpu = s390_env_get_cpu(env);\n> - if (s390_cpu_halt(cpu) == 0) {\n> -#ifndef CONFIG_USER_ONLY\n> - qemu_system_shutdown_request(SHUTDOWN_CAUSE_GUEST_SHUTDOWN);\n> -#endif\n> - }\n> + handle_wait(s390_env_get_cpu(env));\n> }\n> }\n> \n> diff --git a/target/s390x/internal.h b/target/s390x/internal.h\n> index 15743ec40f..cb331f35ea 100644\n> --- a/target/s390x/internal.h\n> +++ b/target/s390x/internal.h\n> @@ -280,6 +280,7 @@ const char *cc_name(enum cc_op cc_op);\n> void load_psw(CPUS390XState *env, uint64_t mask, uint64_t addr);\n> uint32_t calc_cc(CPUS390XState *env, uint32_t cc_op, uint64_t src, uint64_t dst,\n> uint64_t vr);\n> +void handle_wait(S390CPU *cpu);\n> \n> \n> /* cpu.c */\n> diff --git a/target/s390x/kvm.c b/target/s390x/kvm.c\n> index 3f9983154f..14f864697d 100644\n> --- a/target/s390x/kvm.c\n> +++ b/target/s390x/kvm.c\n> @@ -1936,12 +1936,6 @@ static int handle_instruction(S390CPU *cpu, struct kvm_run *run)\n> return r;\n> }\n> \n> -static bool is_special_wait_psw(CPUState *cs)\n> -{\n> - /* signal quiesce */\n> - return cs->kvm_run->psw_addr == 0xfffUL;\n> -}\n> -\n> static void unmanageable_intercept(S390CPU *cpu, const char *str, int pswoffset)\n> {\n> CPUState *cs = CPU(cpu);\n> @@ -2012,14 +2006,7 @@ static int handle_intercept(S390CPU *cpu)\n> break;\n> case ICPT_WAITPSW:\n> /* disabled wait, since enabled wait is handled in kernel */\n> - cpu_synchronize_state(cs);\n\nMaybe we should rather keep the cpu_synchronize_state() here instead of\nputting it in helper.c? No other function in helper.c seems to call that\non its own yet...\n\n> - if (s390_cpu_halt(cpu) == 0) {\n> - if (is_special_wait_psw(cs)) {\n> - qemu_system_shutdown_request(SHUTDOWN_CAUSE_GUEST_SHUTDOWN);\n> - } else {\n> - qemu_system_guest_panicked(NULL);\n> - }\n> - }\n> + handle_wait(cpu);\n> r = EXCP_HALTED;\n> break;\n> case ICPT_CPU_STOP:\n> \n\n Thomas","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-mx10.extmail.prod.ext.phx2.redhat.com;\n\tdmarc=none (p=none dis=none) header.from=redhat.com","ext-mx10.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 3y10YH282kz9tX3\n\tfor ;\n\tMon, 25 Sep 2017 20:23:42 +1000 (AEST)","from localhost ([::1]:41614 helo=lists.gnu.org)\n\tby lists.gnu.org with esmtp (Exim 4.71) (envelope-from\n\t)\n\tid 1dwQY7-0004rG-8n\n\tfor incoming@patchwork.ozlabs.org; Mon, 25 Sep 2017 06:23:39 -0400","from eggs.gnu.org ([2001:4830:134:3::10]:46203)\n\tby lists.gnu.org with esmtp (Exim 4.71)\n\t(envelope-from ) id 1dwQXc-0004qx-PN\n\tfor qemu-devel@nongnu.org; Mon, 25 Sep 2017 06:23:09 -0400","from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71)\n\t(envelope-from ) id 1dwQXZ-0003Qg-5R\n\tfor qemu-devel@nongnu.org; Mon, 25 Sep 2017 06:23:08 -0400","from mx1.redhat.com ([209.132.183.28]:38916)\n\tby eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32)\n\t(Exim 4.71) (envelope-from ) id 1dwQXY-0003QS-SM\n\tfor qemu-devel@nongnu.org; Mon, 25 Sep 2017 06:23:05 -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 9152561475;\n\tMon, 25 Sep 2017 10:23:03 +0000 (UTC)","from [10.36.117.66] (ovpn-117-66.ams2.redhat.com [10.36.117.66])\n\tby smtp.corp.redhat.com (Postfix) with ESMTPS id F2E48709E0;\n\tMon, 25 Sep 2017 10:22:57 +0000 (UTC)"],"DMARC-Filter":"OpenDMARC Filter v1.3.2 mx1.redhat.com 9152561475","To":"David Hildenbrand , qemu-devel@nongnu.org","References":"<20170918160012.4317-1-david@redhat.com>\n\t<20170918160012.4317-10-david@redhat.com>","From":"Thomas Huth ","Message-ID":"","Date":"Mon, 25 Sep 2017 12:22:56 +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":"<20170918160012.4317-10-david@redhat.com>","Content-Type":"text/plain; charset=utf-8","Content-Language":"en-US","Content-Transfer-Encoding":"7bit","X-Scanned-By":"MIMEDefang 2.79 on 10.5.11.12","X-Greylist":"Sender IP whitelisted, not delayed by milter-greylist-4.5.16\n\t(mx1.redhat.com [10.5.110.39]);\n\tMon, 25 Sep 2017 10:23:03 +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 v1 09/27] target/s390x: factor out handling\n\tof WAIT PSW into handle_wait()","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":"Matthew Rosato , cohuck@redhat.com, Richard\n\tHenderson , \n\tAlexander Graf , borntraeger@de.ibm.com, Igor Mammedov\n\t, =?utf-8?q?Alex_Benn=C3=A9e?=\n\t, \tAurelien Jarno ","Errors-To":"qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org","Sender":"\"Qemu-devel\"\n\t"}},{"id":1775031,"web_url":"http://patchwork.ozlabs.org/comment/1775031/","msgid":"<1ca3bf22-aa0d-edc4-296c-6bb827791e95@linaro.org>","list_archive_url":null,"date":"2017-09-25T23:23:06","subject":"Re: [Qemu-devel] [PATCH v1 09/27] target/s390x: factor out handling\n\tof WAIT PSW into handle_wait()","submitter":{"id":72104,"url":"http://patchwork.ozlabs.org/api/people/72104/","name":"Richard Henderson","email":"richard.henderson@linaro.org"},"content":"On 09/18/2017 08:59 AM, David Hildenbrand wrote:\n> This will now also detect crashes under TCG. We can directly use\n> cpu->env.psw.addr instead of kvm_run, as we do a\n> cpu_synchronize_state().\n> \n> Signed-off-by: David Hildenbrand \n> ---\n> target/s390x/helper.c | 28 ++++++++++++++++++++++------\n> target/s390x/internal.h | 1 +\n> target/s390x/kvm.c | 15 +--------------\n> 3 files changed, 24 insertions(+), 20 deletions(-)\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=\"U5XvZdQF\"; 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 3y1KzT0mZXz9t3Z\n\tfor ;\n\tTue, 26 Sep 2017 09:29:09 +1000 (AEST)","from localhost ([::1]:44754 helo=lists.gnu.org)\n\tby lists.gnu.org with esmtp (Exim 4.71) (envelope-from\n\t)\n\tid 1dwcoF-0005Sg-8n\n\tfor incoming@patchwork.ozlabs.org; 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\n\tMon, 25 Sep 2017 16:23:09 -0700 (PDT)","To":"David Hildenbrand , qemu-devel@nongnu.org","References":"<20170918160012.4317-1-david@redhat.com>\n\t<20170918160012.4317-10-david@redhat.com>","From":"Richard Henderson ","Message-ID":"<1ca3bf22-aa0d-edc4-296c-6bb827791e95@linaro.org>","Date":"Mon, 25 Sep 2017 16:23:06 -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":"<20170918160012.4317-10-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:c05::235","Subject":"Re: [Qemu-devel] [PATCH v1 09/27] target/s390x: factor out handling\n\tof WAIT PSW into handle_wait()","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":"Matthew Rosato , thuth@redhat.com,\n\tcohuck@redhat.com, Alexander Graf , \n\tborntraeger@de.ibm.com, Igor Mammedov , \n\t=?utf-8?q?Alex_Benn=C3=A9e?= ,\n\tAurelien Jarno ","Errors-To":"qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org","Sender":"\"Qemu-devel\"\n\t"}},{"id":1775463,"web_url":"http://patchwork.ozlabs.org/comment/1775463/","msgid":"","list_archive_url":null,"date":"2017-09-26T13:04:23","subject":"Re: [Qemu-devel] [PATCH v1 09/27] target/s390x: factor out handling\n\tof WAIT PSW into handle_wait()","submitter":{"id":70402,"url":"http://patchwork.ozlabs.org/api/people/70402/","name":"David Hildenbrand","email":"david@redhat.com"},"content":">> +\n>> +void handle_wait(S390CPU *cpu)\n> \n> \"handle_wait\" is a very generic name ... could you maybe at least name\n> this \"s390x_handle_wait\" or so?\n\nsure, will do, thanks!\n\n> \n>> +{\n>> + cpu_synchronize_state(CPU(cpu));\n>> + if (s390_cpu_halt(cpu) == 0) {\n>> +#ifndef CONFIG_USER_ONLY\n>> + if (is_special_wait_psw(cpu->env.psw.addr)) {\n>> + qemu_system_shutdown_request(SHUTDOWN_CAUSE_GUEST_SHUTDOWN);\n>> + } else {\n>> + qemu_system_guest_panicked(NULL);\n>> + }\n>> +#endif\n>> + }\n>> +}\n[...]\n\n>> - cpu_synchronize_state(cs);\n> \n> Maybe we should rather keep the cpu_synchronize_state() here instead of\n> putting it in helper.c? No other function in helper.c seems to call that\n> on its own yet...\n\nDon't have a strong opinion on this, as long as it works :)\n\n> \n>> - if (s390_cpu_halt(cpu) == 0) {\n>> - if (is_special_wait_psw(cs)) {\n>> - qemu_system_shutdown_request(SHUTDOWN_CAUSE_GUEST_SHUTDOWN);\n>> - } else {\n>> - qemu_system_guest_panicked(NULL);\n>> - }\n>> - }\n>> + handle_wait(cpu);\n>> r = EXCP_HALTED;\n>> break;\n>> case ICPT_CPU_STOP:\n>>\n> \n> Thomas\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=208.118.235.17; helo=lists.gnu.org;\n\tenvelope-from=qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org;\n\treceiver=)","ext-mx09.extmail.prod.ext.phx2.redhat.com;\n\tdmarc=none (p=none dis=none) header.from=redhat.com","ext-mx09.extmail.prod.ext.phx2.redhat.com;\n\tspf=fail smtp.mailfrom=david@redhat.com"],"Received":["from lists.gnu.org (lists.gnu.org [208.118.235.17])\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 3y1h5J1CrQz9tXj\n\tfor ;\n\tTue, 26 Sep 2017 23:05:24 +1000 (AEST)","from localhost ([::1]:47486 helo=lists.gnu.org)\n\tby lists.gnu.org with esmtp (Exim 4.71) (envelope-from\n\t)\n\tid 1dwpYA-0003Z4-82\n\tfor incoming@patchwork.ozlabs.org; Tue, 26 Sep 2017 09:05:22 -0400","from eggs.gnu.org ([2001:4830:134:3::10]:38974)\n\tby lists.gnu.org with esmtp (Exim 4.71)\n\t(envelope-from ) id 1dwpXN-0003UX-1H\n\tfor qemu-devel@nongnu.org; Tue, 26 Sep 2017 09:04:39 -0400","from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71)\n\t(envelope-from ) id 1dwpXI-0006W8-30\n\tfor qemu-devel@nongnu.org; Tue, 26 Sep 2017 09:04:33 -0400","from mx1.redhat.com ([209.132.183.28]:35492)\n\tby eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32)\n\t(Exim 4.71) (envelope-from ) id 1dwpXH-0006Vm-U3\n\tfor qemu-devel@nongnu.org; Tue, 26 Sep 2017 09:04:28 -0400","from smtp.corp.redhat.com\n\t(int-mx01.intmail.prod.int.phx2.redhat.com [10.5.11.11])\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 C5019D7159;\n\tTue, 26 Sep 2017 13:04:26 +0000 (UTC)","from [10.36.117.152] (ovpn-117-152.ams2.redhat.com [10.36.117.152])\n\tby smtp.corp.redhat.com (Postfix) with ESMTP id 6C6AF6C422;\n\tTue, 26 Sep 2017 13:04:24 +0000 (UTC)"],"DMARC-Filter":"OpenDMARC Filter v1.3.2 mx1.redhat.com C5019D7159","To":"Thomas Huth , qemu-devel@nongnu.org","References":"<20170918160012.4317-1-david@redhat.com>\n\t<20170918160012.4317-10-david@redhat.com>\n\t","From":"David Hildenbrand ","Organization":"Red Hat GmbH","Message-ID":"","Date":"Tue, 26 Sep 2017 15:04:23 +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":"","Content-Type":"text/plain; charset=utf-8","Content-Language":"en-US","Content-Transfer-Encoding":"7bit","X-Scanned-By":"MIMEDefang 2.79 on 10.5.11.11","X-Greylist":"Sender IP whitelisted, not delayed by milter-greylist-4.5.16\n\t(mx1.redhat.com [10.5.110.38]);\n\tTue, 26 Sep 2017 13:04:26 +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 v1 09/27] target/s390x: factor out handling\n\tof WAIT PSW into handle_wait()","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":"Matthew Rosato , cohuck@redhat.com, Richard\n\tHenderson , \n\tAlexander Graf , borntraeger@de.ibm.com, Igor Mammedov\n\t, =?utf-8?q?Alex_Benn=C3=A9e?=\n\t, \tAurelien Jarno ","Errors-To":"qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org","Sender":"\"Qemu-devel\"\n\t"}}]