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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 23CD8C433EF for ; Tue, 25 Jan 2022 18:32:13 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232440AbiAYScI (ORCPT ); Tue, 25 Jan 2022 13:32:08 -0500 Received: from us-smtp-delivery-124.mimecast.com ([170.10.129.124]:24765 "EHLO us-smtp-delivery-124.mimecast.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232377AbiAYSbs (ORCPT ); Tue, 25 Jan 2022 13:31:48 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1643135504; 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=ZiMvtf0ISdZjP/XjkwKlDCax9+P+Wq5+7WeQC/1x/e0=; b=HeP3RJUIuZ8gm/2Vqe4BPhH4wFgtOXef1/8l29Oh2Z/03KKzS56Kil20VopEFviebd2Sxh Prtqtp8N/qnIN7ehUQyKRgzfZ0+pbjv/+ETFgHjzG7LVj+IbyWPfYUKCGYyMkagxC+4iv3 nFwQYBM0GUa+MZXpKZYv0NgNpxt8JKE= Received: from mail-wr1-f71.google.com (mail-wr1-f71.google.com [209.85.221.71]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id us-mta-253-Jnxv3xLLPm2901E-dlcFPQ-1; Tue, 25 Jan 2022 13:31:42 -0500 X-MC-Unique: Jnxv3xLLPm2901E-dlcFPQ-1 Received: by mail-wr1-f71.google.com with SMTP id k12-20020adfe3cc000000b001d6806dfde1so3441637wrm.16 for ; Tue, 25 Jan 2022 10:31:42 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; 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=ZiMvtf0ISdZjP/XjkwKlDCax9+P+Wq5+7WeQC/1x/e0=; b=fe1qjKV/sqcnXU1ikGcZmTyEU8yOj7Tno2KIwBj1tuFK8RJtC5+/oD17qKgr0FS6Ea e53x7SQA7vWMCCC87DhhmA+/gm4ETQLh2izXtHMfsy0PH0ScUfWu8ZijGvE0HlKQh5Qm CUihJygzYlOfAfCoE96HfApML6VJgoGT5gvQYVO7Z0ke17YtQiCzcL6A4qNq04XWLeFd cwwiUbo6BmdK4zpBU7ktHNQmkAfwVUj4SdBQemPs59C3qzXYDVSCY6Atj7YqD0zzy0q9 gMNgQVPAJg9mKKwcuQ9ldVhtM+YGtKs/ohR1+hRNcA3h+/LE7Uz5aGohUPJYNXU3jtr8 D1oQ== X-Gm-Message-State: AOAM531saklfl8MFnyygqe3l+KfffunoGOYOoJvi3nsO/XbhtYG7Wv+e 52Lbtj39Ooh9oFQQW4SL/7PjdPEO9TAp20XHJ9DDl9AgQu6oq+FseBm1OQuKBCPgKXVCQXtPyZb BSw1HV682Erl4MREDRx6my2Ba X-Received: by 2002:a05:600c:3b9c:: with SMTP id n28mr4026525wms.128.1643135501327; Tue, 25 Jan 2022 10:31:41 -0800 (PST) X-Google-Smtp-Source: ABdhPJyN0IgX820Ekp2FGnNepZZuBtQxuN7cmwVJ8BQ4uskdVHzzxIheTLTx4aGzRFqWOkVsmlYLoA== X-Received: by 2002:a05:600c:3b9c:: with SMTP id n28mr4026515wms.128.1643135501089; Tue, 25 Jan 2022 10:31:41 -0800 (PST) Received: from ?IPv6:2a01:e0a:59e:9d80:527b:9dff:feef:3874? ([2a01:e0a:59e:9d80:527b:9dff:feef:3874]) by smtp.gmail.com with ESMTPSA id d4sm1656669wri.39.2022.01.25.10.31.39 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Tue, 25 Jan 2022 10:31:40 -0800 (PST) Subject: Re: [PATCH v4 06/21] KVM: arm64: Support SDEI_EVENT_CONTEXT hypercall To: Gavin Shan , Shannon Zhao , kvmarm@lists.cs.columbia.edu Cc: maz@kernel.org, pbonzini@redhat.com, will@kernel.org, linux-kernel@vger.kernel.org, Jonathan.Cameron@huawei.com References: <20210815001352.81927-1-gshan@redhat.com> <20210815001352.81927-7-gshan@redhat.com> <40d818a2-0c91-e06e-6ce8-ac8123b8d1d4@gmail.com> <798ecbb0-f369-f3e7-ad50-78acfd902d1d@redhat.com> From: Eric Auger Message-ID: <3d791443-d3d3-29fb-98a4-bebadb84597e@redhat.com> Date: Tue, 25 Jan 2022 19:31:39 +0100 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Thunderbird/78.10.1 MIME-Version: 1.0 In-Reply-To: <798ecbb0-f369-f3e7-ad50-78acfd902d1d@redhat.com> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi Gavin, On 1/13/22 8:02 AM, Gavin Shan wrote: > Hi Shannon, > > On 1/11/22 5:43 PM, Shannon Zhao wrote: >> On 2021/8/15 8:13, Gavin Shan wrote: >>> +static unsigned long kvm_sdei_hypercall_context(struct kvm_vcpu *vcpu) >>> +{ >>> +    struct kvm *kvm = vcpu->kvm; >>> +    struct kvm_sdei_kvm *ksdei = kvm->arch.sdei; >>> +    struct kvm_sdei_vcpu *vsdei = vcpu->arch.sdei; >>> +    struct kvm_sdei_vcpu_regs *regs; >>> +    unsigned long index = smccc_get_arg1(vcpu); >>> +    unsigned long ret = SDEI_SUCCESS; >>> + >>> +    /* Sanity check */ >>> +    if (!(ksdei && vsdei)) { >>> +        ret = SDEI_NOT_SUPPORTED; >>> +        goto out; >>> +    } >> Maybe we could move these common sanity check codes to >> kvm_sdei_hypercall to save some lines. >> > > Not all hypercalls need this check. For example, > COMPLETE/COMPLETE_RESUME/CONTEXT don't > have SDEI event number as the argument. If we really want move this > check into function > kvm_sdei_hypercall(), we would have code like below. Too much duplicated > snippets will > be seen. I don't think it's better than what we have if I fully > understand your comments. > >       switch (...) { >       case REGISTER: >            if (!(ksdei && vsdei)) { >                ret = SDEI_NOT_SUPPORTED; >                break; >            } at least you can use an inline function taking the vcpu as param? Thanks Eric > >            ret = kvm_sdei_hypercall_register(vcpu); >            break; >       case UNREGISTER: >            if (!(ksdei && vsdei)) { >                ret = SDEI_NOT_SUPPORTED; >                break; >            } > >            ret = kvm_sdei_hypercall_unregister(vcpu); >            break; >      case CONTEXT: >            ret = kvm_sdei_hypercall_context(vcpu); >            break; >        : >     } > > Thanks, > Gavin > > _______________________________________________ > kvmarm mailing list > kvmarm@lists.cs.columbia.edu > https://lists.cs.columbia.edu/mailman/listinfo/kvmarm 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 Received: from mm01.cs.columbia.edu (mm01.cs.columbia.edu [128.59.11.253]) by smtp.lore.kernel.org (Postfix) with ESMTP id CC230C433F5 for ; Tue, 25 Jan 2022 18:31:51 +0000 (UTC) Received: from localhost (localhost [127.0.0.1]) by mm01.cs.columbia.edu (Postfix) with ESMTP id 4FFF749B12; Tue, 25 Jan 2022 13:31:51 -0500 (EST) X-Virus-Scanned: at lists.cs.columbia.edu Authentication-Results: mm01.cs.columbia.edu (amavisd-new); dkim=softfail (fail, message has been altered) header.i=@redhat.com Received: from mm01.cs.columbia.edu ([127.0.0.1]) by localhost (mm01.cs.columbia.edu [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id 8e2MpvYEhz4o; Tue, 25 Jan 2022 13:31:50 -0500 (EST) Received: from mm01.cs.columbia.edu (localhost [127.0.0.1]) by mm01.cs.columbia.edu (Postfix) with ESMTP id 0B5D949E49; Tue, 25 Jan 2022 13:31:50 -0500 (EST) Received: from localhost (localhost [127.0.0.1]) by mm01.cs.columbia.edu (Postfix) with ESMTP id 2E97E49DF6 for ; Tue, 25 Jan 2022 13:31:49 -0500 (EST) X-Virus-Scanned: at lists.cs.columbia.edu Received: from mm01.cs.columbia.edu ([127.0.0.1]) by localhost (mm01.cs.columbia.edu [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id xX5dCegvyWzU for ; Tue, 25 Jan 2022 13:31:48 -0500 (EST) Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.129.124]) by mm01.cs.columbia.edu (Postfix) with ESMTP id 1E24049B12 for ; Tue, 25 Jan 2022 13:31:48 -0500 (EST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1643135507; 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=ZiMvtf0ISdZjP/XjkwKlDCax9+P+Wq5+7WeQC/1x/e0=; b=Hxhf0Ft01ESWssz8LkmeoQkaTKl2E7scc4ibncSRt67/eoJoUMePkUbGG05Ky64a2t9Via YwUkrx7tA+Ql6UIjUI39SnW+4zSUmj9l7//0wDriFW76WGsmKnpY/A2DYanzts5A4FqSR6 PskXtnJbysDPq3weehr8/ts7BL15xns= Received: from mail-wm1-f70.google.com (mail-wm1-f70.google.com [209.85.128.70]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id us-mta-451-TD5edhBgM6-5PPhO3tWcRA-1; Tue, 25 Jan 2022 13:31:42 -0500 X-MC-Unique: TD5edhBgM6-5PPhO3tWcRA-1 Received: by mail-wm1-f70.google.com with SMTP id f7-20020a1cc907000000b0034b63f314ccso1889489wmb.6 for ; Tue, 25 Jan 2022 10:31:42 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; 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=ZiMvtf0ISdZjP/XjkwKlDCax9+P+Wq5+7WeQC/1x/e0=; b=EtWchyyWEW4ROu6VyInj/NwYmnbP46ZMwSA/IjcnV5S2qZw71yNd9ZES1MvXOnl5y8 80oObCMTBQzdumOb+Y1X8brD1NGaiqH2ZBugEIHuwqS2jNiv+wOxH+4PKU+PQA4ifqo3 LpoviR2TC6tvr9tAMhdAgf9KnMACVCHoZttyqNqAir6PHkTJHSIoPqVlg8+Rs60pRAA9 NKChPp9k/MCDZtaQG2RbxdKNh9yebpxeUBJ7MU0OPbZahv2xffVixtFawblbg65seZRv n2v69RPVb3uZ/yoGAN330hvuOG1JNEzVgMDM6WKcAKYY0ArX8Cpa3ZGXBLFxpk7mPauw m6Bw== X-Gm-Message-State: AOAM5307Ew6W4TR2m9eT70BPKTwoQhbDgMycpsPkfYc4HqRn8tdXU5t4 BujvNqcuaqaANdZAMAcCaWI92/+vowzTzqNamQeHHAYBTRLlTDx3cr0cSlUzCsz3/VwHl7Eq21L qRF6gEtz8Ub3GpmKvk1K+dBAH X-Received: by 2002:a05:600c:3b9c:: with SMTP id n28mr4026533wms.128.1643135501346; Tue, 25 Jan 2022 10:31:41 -0800 (PST) X-Google-Smtp-Source: ABdhPJyN0IgX820Ekp2FGnNepZZuBtQxuN7cmwVJ8BQ4uskdVHzzxIheTLTx4aGzRFqWOkVsmlYLoA== X-Received: by 2002:a05:600c:3b9c:: with SMTP id n28mr4026515wms.128.1643135501089; Tue, 25 Jan 2022 10:31:41 -0800 (PST) Received: from ?IPv6:2a01:e0a:59e:9d80:527b:9dff:feef:3874? ([2a01:e0a:59e:9d80:527b:9dff:feef:3874]) by smtp.gmail.com with ESMTPSA id d4sm1656669wri.39.2022.01.25.10.31.39 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Tue, 25 Jan 2022 10:31:40 -0800 (PST) Subject: Re: [PATCH v4 06/21] KVM: arm64: Support SDEI_EVENT_CONTEXT hypercall To: Gavin Shan , Shannon Zhao , kvmarm@lists.cs.columbia.edu References: <20210815001352.81927-1-gshan@redhat.com> <20210815001352.81927-7-gshan@redhat.com> <40d818a2-0c91-e06e-6ce8-ac8123b8d1d4@gmail.com> <798ecbb0-f369-f3e7-ad50-78acfd902d1d@redhat.com> From: Eric Auger Message-ID: <3d791443-d3d3-29fb-98a4-bebadb84597e@redhat.com> Date: Tue, 25 Jan 2022 19:31:39 +0100 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Thunderbird/78.10.1 MIME-Version: 1.0 In-Reply-To: <798ecbb0-f369-f3e7-ad50-78acfd902d1d@redhat.com> Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=eauger@redhat.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Language: en-US Cc: maz@kernel.org, Jonathan.Cameron@huawei.com, will@kernel.org, linux-kernel@vger.kernel.org, pbonzini@redhat.com X-BeenThere: kvmarm@lists.cs.columbia.edu X-Mailman-Version: 2.1.14 Precedence: list List-Id: Where KVM/ARM decisions are made List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Errors-To: kvmarm-bounces@lists.cs.columbia.edu Sender: kvmarm-bounces@lists.cs.columbia.edu SGkgR2F2aW4sCgpPbiAxLzEzLzIyIDg6MDIgQU0sIEdhdmluIFNoYW4gd3JvdGU6Cj4gSGkgU2hh bm5vbiwKPiAKPiBPbiAxLzExLzIyIDU6NDMgUE0sIFNoYW5ub24gWmhhbyB3cm90ZToKPj4gT24g MjAyMS84LzE1IDg6MTMsIEdhdmluIFNoYW4gd3JvdGU6Cj4+PiArc3RhdGljIHVuc2lnbmVkIGxv bmcga3ZtX3NkZWlfaHlwZXJjYWxsX2NvbnRleHQoc3RydWN0IGt2bV92Y3B1ICp2Y3B1KQo+Pj4g K3sKPj4+ICvCoMKgwqAgc3RydWN0IGt2bSAqa3ZtID0gdmNwdS0+a3ZtOwo+Pj4gK8KgwqDCoCBz dHJ1Y3Qga3ZtX3NkZWlfa3ZtICprc2RlaSA9IGt2bS0+YXJjaC5zZGVpOwo+Pj4gK8KgwqDCoCBz dHJ1Y3Qga3ZtX3NkZWlfdmNwdSAqdnNkZWkgPSB2Y3B1LT5hcmNoLnNkZWk7Cj4+PiArwqDCoMKg IHN0cnVjdCBrdm1fc2RlaV92Y3B1X3JlZ3MgKnJlZ3M7Cj4+PiArwqDCoMKgIHVuc2lnbmVkIGxv bmcgaW5kZXggPSBzbWNjY19nZXRfYXJnMSh2Y3B1KTsKPj4+ICvCoMKgwqAgdW5zaWduZWQgbG9u ZyByZXQgPSBTREVJX1NVQ0NFU1M7Cj4+PiArCj4+PiArwqDCoMKgIC8qIFNhbml0eSBjaGVjayAq Lwo+Pj4gK8KgwqDCoCBpZiAoIShrc2RlaSAmJiB2c2RlaSkpIHsKPj4+ICvCoMKgwqDCoMKgwqDC oCByZXQgPSBTREVJX05PVF9TVVBQT1JURUQ7Cj4+PiArwqDCoMKgwqDCoMKgwqAgZ290byBvdXQ7 Cj4+PiArwqDCoMKgIH0KPj4gTWF5YmUgd2UgY291bGQgbW92ZSB0aGVzZSBjb21tb24gc2FuaXR5 IGNoZWNrIGNvZGVzIHRvCj4+IGt2bV9zZGVpX2h5cGVyY2FsbCB0byBzYXZlIHNvbWUgbGluZXMu Cj4+Cj4gCj4gTm90IGFsbCBoeXBlcmNhbGxzIG5lZWQgdGhpcyBjaGVjay4gRm9yIGV4YW1wbGUs Cj4gQ09NUExFVEUvQ09NUExFVEVfUkVTVU1FL0NPTlRFWFQgZG9uJ3QKPiBoYXZlIFNERUkgZXZl bnQgbnVtYmVyIGFzIHRoZSBhcmd1bWVudC4gSWYgd2UgcmVhbGx5IHdhbnQgbW92ZSB0aGlzCj4g Y2hlY2sgaW50byBmdW5jdGlvbgo+IGt2bV9zZGVpX2h5cGVyY2FsbCgpLCB3ZSB3b3VsZCBoYXZl IGNvZGUgbGlrZSBiZWxvdy4gVG9vIG11Y2ggZHVwbGljYXRlZAo+IHNuaXBwZXRzIHdpbGwKPiBi ZSBzZWVuLiBJIGRvbid0IHRoaW5rIGl0J3MgYmV0dGVyIHRoYW4gd2hhdCB3ZSBoYXZlIGlmIEkg ZnVsbHkKPiB1bmRlcnN0YW5kIHlvdXIgY29tbWVudHMuCj4gCj4gwqDCoMKgwqDCoCBzd2l0Y2gg KC4uLikgewo+IMKgwqDCoMKgwqAgY2FzZSBSRUdJU1RFUjoKPiDCoMKgwqDCoMKgwqDCoMKgwqDC oCBpZiAoIShrc2RlaSAmJiB2c2RlaSkpIHsKPiDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKg IHJldCA9IFNERUlfTk9UX1NVUFBPUlRFRDsKPiDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKg IGJyZWFrOwo+IMKgwqDCoMKgwqDCoMKgwqDCoMKgIH0KYXQgbGVhc3QgeW91IGNhbiB1c2UgYW4g aW5saW5lIGZ1bmN0aW9uIHRha2luZyB0aGUgdmNwdSBhcyBwYXJhbT8KClRoYW5rcwoKRXJpYwo+ IAo+IMKgwqDCoMKgwqDCoMKgwqDCoMKgIHJldCA9IGt2bV9zZGVpX2h5cGVyY2FsbF9yZWdpc3Rl cih2Y3B1KTsKPiDCoMKgwqDCoMKgwqDCoMKgwqDCoCBicmVhazsKPiDCoMKgwqDCoMKgIGNhc2Ug VU5SRUdJU1RFUjoKPiDCoMKgwqDCoMKgwqDCoMKgwqDCoCBpZiAoIShrc2RlaSAmJiB2c2RlaSkp IHsKPiDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgIHJldCA9IFNERUlfTk9UX1NVUFBPUlRF RDsKPiDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgIGJyZWFrOwo+IMKgwqDCoMKgwqDCoMKg wqDCoMKgIH0KPiAKPiDCoMKgwqDCoMKgwqDCoMKgwqDCoCByZXQgPSBrdm1fc2RlaV9oeXBlcmNh bGxfdW5yZWdpc3Rlcih2Y3B1KTsKPiDCoMKgwqDCoMKgwqDCoMKgwqDCoCBicmVhazsKPiDCoMKg wqDCoCBjYXNlIENPTlRFWFQ6Cj4gwqDCoMKgwqDCoMKgwqDCoMKgwqAgcmV0ID0ga3ZtX3NkZWlf aHlwZXJjYWxsX2NvbnRleHQodmNwdSk7Cj4gwqDCoMKgwqDCoMKgwqDCoMKgwqAgYnJlYWs7Cj4g wqDCoMKgwqDCoMKgIDoKPiDCoMKgwqAgfQo+IAo+IFRoYW5rcywKPiBHYXZpbgo+IAo+IF9fX19f X19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fCj4ga3ZtYXJtIG1haWxp bmcgbGlzdAo+IGt2bWFybUBsaXN0cy5jcy5jb2x1bWJpYS5lZHUKPiBodHRwczovL2xpc3RzLmNz LmNvbHVtYmlhLmVkdS9tYWlsbWFuL2xpc3RpbmZvL2t2bWFybQoKX19fX19fX19fX19fX19fX19f X19fX19fX19fX19fX19fX19fX19fX19fX19fX18Ka3ZtYXJtIG1haWxpbmcgbGlzdAprdm1hcm1A bGlzdHMuY3MuY29sdW1iaWEuZWR1Cmh0dHBzOi8vbGlzdHMuY3MuY29sdW1iaWEuZWR1L21haWxt YW4vbGlzdGluZm8va3ZtYXJtCg==