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[83.57.175.68]) by smtp.gmail.com with ESMTPSA id s2sm8446265edt.35.2021.02.22.09.46.16 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Mon, 22 Feb 2021 09:46:18 -0800 (PST) X-BeenThere: xen-devel@lists.xenproject.org List-Id: Xen developer discussion List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Errors-To: xen-devel-bounces@lists.xenproject.org Precedence: list Sender: "Xen-devel" X-Inumbo-ID: 63f9116a-6948-45f5-965d-1fbaf19a8a6a DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1614015984; 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=a3xauJaR66hfM3jitPOYh7RFO07zXJKYLcWPgDvmEWs=; b=abfOmxhQRXxloIPo1wlXbGWMGcPQ4MzBmK5SyQIwNnQ6BL1oYwj5pzD072tQTIRsg5TnSr cj9Yx69C4NWmzyGjbwjC6FKUFMUYd+vDSIZJwYZ9O3aFzLBtnJcNa7C86WK9tAf/pGOC8o w/b42ObNg6l6y0Fx+M70U4IQPqdn8m0= X-MC-Unique: W2kS_EfeOFe0_XbI0Xr19A-1 X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:subject:to:cc:references:from:message-id:date :user-agent:mime-version:in-reply-to:content-language :content-transfer-encoding; bh=a3xauJaR66hfM3jitPOYh7RFO07zXJKYLcWPgDvmEWs=; b=sAWDWygKiPRi+qRs6UbRDAzrBDOVq39vKZj6FErNQuFYmdYYQSgW5mtMuLdO9tJJ7z 9tWV+Rj2ciunUPgLJIHsSoTLjy2GUJSwtJeviR1Ro8Yx4ZWXmEEKzjaGt6HBWhsyla2d H9oZmSnGIeEZeaJ2gzGM6p61QcfD0D+4f6aStzRFg39OpsR6MwSDYOQoWLrNRvr1OOHg JvJSc+qHA6TgpaUO6tZ9W+/+49ExrzTxiUV5hfgj+WNX5pZBwPXfL0urgzalCcAIxuH6 cwuZysVW/Ffn9QgWlp5We8J+ViYMeT4vrXSEdd47h7Luaj+M3AKy2BGEQohXvvyfw/ek X6Zg== X-Gm-Message-State: AOAM531q5fsb7I3ilsTIGYTQQCvEmffep0xX3l3cORx3iF5cyulsuSCC yA32U5q4BfvstufFJyd93A/zAGCdaEaJyvGWyNMhYIXmI2K/iep0kcqZ0SeazjKsKEhbVuX9Zan sAwbWD5o7br9E8grhTWV8xCNCmLU= X-Received: by 2002:a05:6402:17b6:: with SMTP id j22mr23112097edy.325.1614015978954; Mon, 22 Feb 2021 09:46:18 -0800 (PST) X-Received: by 2002:a05:6402:17b6:: with SMTP id j22mr23112063edy.325.1614015978791; Mon, 22 Feb 2021 09:46:18 -0800 (PST) Subject: Re: [PATCH v2 02/11] hw/boards: Introduce machine_class_valid_for_accelerator() To: Cornelia Huck Cc: qemu-devel@nongnu.org, Aurelien Jarno , Peter Maydell , Anthony Perard , qemu-ppc@nongnu.org, qemu-s390x@nongnu.org, Halil Pasic , Huacai Chen , xen-devel@lists.xenproject.org, Marcel Apfelbaum , David Gibson , qemu-arm@nongnu.org, Stefano Stabellini , Paolo Bonzini , kvm@vger.kernel.org, BALATON Zoltan , Leif Lindholm , Richard Henderson , Radoslaw Biernacki , Alistair Francis , Paul Durrant , Eduardo Habkost , "Michael S. Tsirkin" , Thomas Huth , Jiaxun Yang , =?UTF-8?Q?Herv=c3=a9_Poussineau?= , Greg Kurz , Christian Borntraeger , "Edgar E. Iglesias" , David Hildenbrand , Mark Cave-Ayland , Aleksandar Rikalo , =?UTF-8?Q?Philippe_Mathieu-Daud=c3=a9?= References: <20210219173847.2054123-1-philmd@redhat.com> <20210219173847.2054123-3-philmd@redhat.com> <20210222183400.0c151d46.cohuck@redhat.com> From: =?UTF-8?Q?Philippe_Mathieu-Daud=c3=a9?= Message-ID: <6ceff55c-6da4-e773-7809-de3be2f566ab@redhat.com> Date: Mon, 22 Feb 2021 18:46:15 +0100 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Thunderbird/78.7.0 MIME-Version: 1.0 In-Reply-To: <20210222183400.0c151d46.cohuck@redhat.com> Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=philmd@redhat.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 8bit X-TUID: Kf49m23QaqoY On 2/22/21 6:34 PM, Cornelia Huck wrote: > On Fri, 19 Feb 2021 18:38:38 +0100 > Philippe Mathieu-Daudé wrote: > >> Introduce the valid_accelerators[] field to express the list >> of valid accelators a machine can use, and add the >> machine_class_valid_for_current_accelerator() and >> machine_class_valid_for_accelerator() methods. >> >> Signed-off-by: Philippe Mathieu-Daudé >> --- >> include/hw/boards.h | 24 ++++++++++++++++++++++++ >> hw/core/machine.c | 26 ++++++++++++++++++++++++++ >> 2 files changed, 50 insertions(+) >> >> diff --git a/include/hw/boards.h b/include/hw/boards.h >> index 68d3d10f6b0..4d08bc12093 100644 >> --- a/include/hw/boards.h >> +++ b/include/hw/boards.h >> @@ -36,6 +36,24 @@ void machine_set_cpu_numa_node(MachineState *machine, >> const CpuInstanceProperties *props, >> Error **errp); >> >> +/** >> + * machine_class_valid_for_accelerator: >> + * @mc: the machine class >> + * @acc_name: accelerator name >> + * >> + * Returns %true if the accelerator is valid for the machine, %false >> + * otherwise. See #MachineClass.valid_accelerators. > > Naming confusion: is the machine class valid for the accelerator, or > the accelerator valid for the machine class? Or either? :) "the accelerator valid for the machine class". Is this clearer? "Returns %true if the current accelerator is valid for the selected machine, %false otherwise. Or... "Returns %true if the selected accelerator is valid for the current machine, %false otherwise. How would look "either"? The machine is already selected, and the accelerator too... > >> + */ >> +bool machine_class_valid_for_accelerator(MachineClass *mc, const char *acc_name); >> +/** >> + * machine_class_valid_for_current_accelerator: >> + * @mc: the machine class >> + * >> + * Returns %true if the accelerator is valid for the current machine, >> + * %false otherwise. See #MachineClass.valid_accelerators. > > Same here: current accelerator vs. current machine. > >> + */ >> +bool machine_class_valid_for_current_accelerator(MachineClass *mc); >> + >> void machine_class_allow_dynamic_sysbus_dev(MachineClass *mc, const char *type); >> /* >> * Checks that backend isn't used, preps it for exclusive usage and >> @@ -125,6 +143,11 @@ typedef struct { >> * should instead use "unimplemented-device" for all memory ranges where >> * the guest will attempt to probe for a device that QEMU doesn't >> * implement and a stub device is required. >> + * @valid_accelerators: >> + * If this machine supports a specific set of virtualization accelerators, >> + * this contains a NULL-terminated list of the accelerators that can be >> + * used. If this field is not set, any accelerator is valid. The QTest >> + * accelerator is always valid. >> * @kvm_type: >> * Return the type of KVM corresponding to the kvm-type string option or >> * computed based on other criteria such as the host kernel capabilities >> @@ -166,6 +189,7 @@ struct MachineClass { >> const char *alias; >> const char *desc; >> const char *deprecation_reason; >> + const char *const *valid_accelerators; >> >> void (*init)(MachineState *state); >> void (*reset)(MachineState *state); >> diff --git a/hw/core/machine.c b/hw/core/machine.c >> index 970046f4388..c42d8e382b1 100644 >> --- a/hw/core/machine.c >> +++ b/hw/core/machine.c >> @@ -518,6 +518,32 @@ static void machine_set_nvdimm_persistence(Object *obj, const char *value, >> nvdimms_state->persistence_string = g_strdup(value); >> } >> >> +bool machine_class_valid_for_accelerator(MachineClass *mc, const char *acc_name) >> +{ >> + const char *const *name = mc->valid_accelerators; >> + >> + if (!name) { >> + return true; >> + } >> + if (strcmp(acc_name, "qtest") == 0) { >> + return true; >> + } >> + >> + for (unsigned i = 0; name[i]; i++) { >> + if (strcasecmp(acc_name, name[i]) == 0) { >> + return true; >> + } >> + } >> + return false; >> +} >> + >> +bool machine_class_valid_for_current_accelerator(MachineClass *mc) >> +{ >> + AccelClass *ac = ACCEL_GET_CLASS(current_accel()); >> + >> + return machine_class_valid_for_accelerator(mc, ac->name); >> +} > > The implementation of the function tests for the current accelerator, > so I think you need to tweak the description above? > >> + >> void machine_class_allow_dynamic_sysbus_dev(MachineClass *mc, const char *type) >> { >> QAPI_LIST_PREPEND(mc->allowed_dynamic_sysbus_devices, g_strdup(type)); > 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=-15.1 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,NICE_REPLY_A,SPF_HELO_NONE,SPF_PASS,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 8C04CC433DB for ; Mon, 22 Feb 2021 17:53:31 +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 371AE64E27 for ; Mon, 22 Feb 2021 17:53:31 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 371AE64E27 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=redhat.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Received: from localhost ([::1]:44012 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1lEFOk-0005Rs-5m for qemu-devel@archiver.kernel.org; Mon, 22 Feb 2021 12:53:30 -0500 Received: from eggs.gnu.org ([2001:470:142:3::10]:52828) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1lEFHv-0007DP-CY for qemu-devel@nongnu.org; Mon, 22 Feb 2021 12:46:27 -0500 Received: from us-smtp-delivery-124.mimecast.com ([216.205.24.124]:35886) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_CBC_SHA1:256) (Exim 4.90_1) (envelope-from ) id 1lEFHs-0001oF-Bt for qemu-devel@nongnu.org; Mon, 22 Feb 2021 12:46:26 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1614015982; 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=a3xauJaR66hfM3jitPOYh7RFO07zXJKYLcWPgDvmEWs=; b=PaUN9kSw/Dj9bhsaTEmJSH3renZze1rqu9xofHsz1Bk4bv5GDAqlrpjJNYCsX3BYGSDFhZ m7c5SY7jbZgxc81RmugyjdYZ0oYo0PhnUvJV5hhU1C6OjQil2OQbgfANzIRjCnu70NB4qb lwD+xdQbOsTT+a+bYmc0MfcawewiQSo= Received: from mail-ed1-f72.google.com (mail-ed1-f72.google.com [209.85.208.72]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-581-p7F-mMs0O6qhJ6RDYtlEog-1; Mon, 22 Feb 2021 12:46:21 -0500 X-MC-Unique: p7F-mMs0O6qhJ6RDYtlEog-1 Received: by mail-ed1-f72.google.com with SMTP id u2so7392212edj.20 for ; Mon, 22 Feb 2021 09:46:19 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:subject:to:cc:references:from:message-id:date :user-agent:mime-version:in-reply-to:content-language :content-transfer-encoding; bh=a3xauJaR66hfM3jitPOYh7RFO07zXJKYLcWPgDvmEWs=; b=qVf8gwXr8qG7YXrn11zIEQa6Od3Ic5XbcanI7huP5ncggtYzoSExgw9k6r9AkBz2/t s33x4OO2I97JGRN1Jstx+PZR3Jg1PCLnCqkP6Qj3oHWUabTw4ckK2Tiq+upBT107GQub FqSdB2i2oXYqulFcXS3MKAkig2NF8njMZ0qLdRD9zymePxhbF5d1hpigAj8BSTvVtaMR Q+I17Y1FDvUlZt7771PRMP/WO8o8c8goGfrV3f00m1cR+U+WRKx9zq7KOebF6qe3QUcY obPpFPJhYLI31owpRYfMbNZVXzb9HdUsIa+GXjIyswqN6rFqU2/yKTSRoKcz6tOt/3Z0 I3SA== X-Gm-Message-State: AOAM530PJ8T6U7NKU47NockGcN/LQ1juCj9YOIqkU/LeZ5SuodHIpmRv xM/lossog289GOFYvplNgTlh9U1K/Je0glxS3ldxqOruJ/mk3XcfmYFczR6+iEGH973d87Ix2Xs b52EM0jWvZ/oiSn4= X-Received: by 2002:a05:6402:17b6:: with SMTP id j22mr23112111edy.325.1614015978983; Mon, 22 Feb 2021 09:46:18 -0800 (PST) X-Google-Smtp-Source: ABdhPJwDAve+ys1o3Ix/SlRK4csT4W1S2Ma59p+Xf1UMouPtJ1ZRfjAz9b8cjfXQB2d67f6WzKBREw== X-Received: by 2002:a05:6402:17b6:: with SMTP id j22mr23112063edy.325.1614015978791; Mon, 22 Feb 2021 09:46:18 -0800 (PST) Received: from [192.168.1.36] (68.red-83-57-175.dynamicip.rima-tde.net. [83.57.175.68]) by smtp.gmail.com with ESMTPSA id s2sm8446265edt.35.2021.02.22.09.46.16 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Mon, 22 Feb 2021 09:46:18 -0800 (PST) Subject: Re: [PATCH v2 02/11] hw/boards: Introduce machine_class_valid_for_accelerator() To: Cornelia Huck References: <20210219173847.2054123-1-philmd@redhat.com> <20210219173847.2054123-3-philmd@redhat.com> <20210222183400.0c151d46.cohuck@redhat.com> From: =?UTF-8?Q?Philippe_Mathieu-Daud=c3=a9?= Message-ID: <6ceff55c-6da4-e773-7809-de3be2f566ab@redhat.com> Date: Mon, 22 Feb 2021 18:46:15 +0100 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Thunderbird/78.7.0 MIME-Version: 1.0 In-Reply-To: <20210222183400.0c151d46.cohuck@redhat.com> Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=philmd@redhat.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 8bit Received-SPF: pass client-ip=216.205.24.124; envelope-from=philmd@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -27 X-Spam_score: -2.8 X-Spam_bar: -- X-Spam_report: (-2.8 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.001, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, NICE_REPLY_A=-0.001, RCVD_IN_DNSWL_LOW=-0.7, RCVD_IN_MSPIKE_H3=0.001, RCVD_IN_MSPIKE_WL=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=unavailable 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: Peter Maydell , kvm@vger.kernel.org, Paul Durrant , David Hildenbrand , qemu-devel@nongnu.org, "Edgar E. Iglesias" , Stefano Stabellini , "Michael S. Tsirkin" , Huacai Chen , Halil Pasic , Christian Borntraeger , =?UTF-8?Q?Herv=c3=a9_Poussineau?= , Anthony Perard , xen-devel@lists.xenproject.org, Leif Lindholm , Thomas Huth , Eduardo Habkost , Mark Cave-Ayland , Alistair Francis , Richard Henderson , Greg Kurz , qemu-s390x@nongnu.org, qemu-arm@nongnu.org, David Gibson , Radoslaw Biernacki , =?UTF-8?Q?Philippe_Mathieu-Daud=c3=a9?= , qemu-ppc@nongnu.org, Paolo Bonzini , Aleksandar Rikalo , Aurelien Jarno Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" On 2/22/21 6:34 PM, Cornelia Huck wrote: > On Fri, 19 Feb 2021 18:38:38 +0100 > Philippe Mathieu-Daudé wrote: > >> Introduce the valid_accelerators[] field to express the list >> of valid accelators a machine can use, and add the >> machine_class_valid_for_current_accelerator() and >> machine_class_valid_for_accelerator() methods. >> >> Signed-off-by: Philippe Mathieu-Daudé >> --- >> include/hw/boards.h | 24 ++++++++++++++++++++++++ >> hw/core/machine.c | 26 ++++++++++++++++++++++++++ >> 2 files changed, 50 insertions(+) >> >> diff --git a/include/hw/boards.h b/include/hw/boards.h >> index 68d3d10f6b0..4d08bc12093 100644 >> --- a/include/hw/boards.h >> +++ b/include/hw/boards.h >> @@ -36,6 +36,24 @@ void machine_set_cpu_numa_node(MachineState *machine, >> const CpuInstanceProperties *props, >> Error **errp); >> >> +/** >> + * machine_class_valid_for_accelerator: >> + * @mc: the machine class >> + * @acc_name: accelerator name >> + * >> + * Returns %true if the accelerator is valid for the machine, %false >> + * otherwise. See #MachineClass.valid_accelerators. > > Naming confusion: is the machine class valid for the accelerator, or > the accelerator valid for the machine class? Or either? :) "the accelerator valid for the machine class". Is this clearer? "Returns %true if the current accelerator is valid for the selected machine, %false otherwise. Or... "Returns %true if the selected accelerator is valid for the current machine, %false otherwise. How would look "either"? The machine is already selected, and the accelerator too... > >> + */ >> +bool machine_class_valid_for_accelerator(MachineClass *mc, const char *acc_name); >> +/** >> + * machine_class_valid_for_current_accelerator: >> + * @mc: the machine class >> + * >> + * Returns %true if the accelerator is valid for the current machine, >> + * %false otherwise. See #MachineClass.valid_accelerators. > > Same here: current accelerator vs. current machine. > >> + */ >> +bool machine_class_valid_for_current_accelerator(MachineClass *mc); >> + >> void machine_class_allow_dynamic_sysbus_dev(MachineClass *mc, const char *type); >> /* >> * Checks that backend isn't used, preps it for exclusive usage and >> @@ -125,6 +143,11 @@ typedef struct { >> * should instead use "unimplemented-device" for all memory ranges where >> * the guest will attempt to probe for a device that QEMU doesn't >> * implement and a stub device is required. >> + * @valid_accelerators: >> + * If this machine supports a specific set of virtualization accelerators, >> + * this contains a NULL-terminated list of the accelerators that can be >> + * used. If this field is not set, any accelerator is valid. The QTest >> + * accelerator is always valid. >> * @kvm_type: >> * Return the type of KVM corresponding to the kvm-type string option or >> * computed based on other criteria such as the host kernel capabilities >> @@ -166,6 +189,7 @@ struct MachineClass { >> const char *alias; >> const char *desc; >> const char *deprecation_reason; >> + const char *const *valid_accelerators; >> >> void (*init)(MachineState *state); >> void (*reset)(MachineState *state); >> diff --git a/hw/core/machine.c b/hw/core/machine.c >> index 970046f4388..c42d8e382b1 100644 >> --- a/hw/core/machine.c >> +++ b/hw/core/machine.c >> @@ -518,6 +518,32 @@ static void machine_set_nvdimm_persistence(Object *obj, const char *value, >> nvdimms_state->persistence_string = g_strdup(value); >> } >> >> +bool machine_class_valid_for_accelerator(MachineClass *mc, const char *acc_name) >> +{ >> + const char *const *name = mc->valid_accelerators; >> + >> + if (!name) { >> + return true; >> + } >> + if (strcmp(acc_name, "qtest") == 0) { >> + return true; >> + } >> + >> + for (unsigned i = 0; name[i]; i++) { >> + if (strcasecmp(acc_name, name[i]) == 0) { >> + return true; >> + } >> + } >> + return false; >> +} >> + >> +bool machine_class_valid_for_current_accelerator(MachineClass *mc) >> +{ >> + AccelClass *ac = ACCEL_GET_CLASS(current_accel()); >> + >> + return machine_class_valid_for_accelerator(mc, ac->name); >> +} > > The implementation of the function tests for the current accelerator, > so I think you need to tweak the description above? > >> + >> void machine_class_allow_dynamic_sysbus_dev(MachineClass *mc, const char *type) >> { >> QAPI_LIST_PREPEND(mc->allowed_dynamic_sysbus_devices, g_strdup(type)); >