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=-16.4 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER,INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS 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 203BEC43460 for ; Fri, 7 May 2021 06:32:32 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id E5C11613FA for ; Fri, 7 May 2021 06:32:31 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234696AbhEGGdY (ORCPT ); Fri, 7 May 2021 02:33:24 -0400 Received: from us-smtp-delivery-124.mimecast.com ([170.10.133.124]:23863 "EHLO us-smtp-delivery-124.mimecast.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234667AbhEGGdM (ORCPT ); Fri, 7 May 2021 02:33:12 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1620369132; 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=qCbS7qRJkXwtXTweMfCEBwqKoyLH3IhRHr47SvYqe9g=; b=LmXLQnhVIEkCzvoat82nCRsGtrGlFfNmkQ1FW5zyXEwHQ8E4+HINEHxPXiAJjfHPwd97Xu 1A8BhlR5UxDBxQBiThwPUsBFc0mYNopwEFeb2YkwGHo4ZWvFU6xo7XaZ62mlbj96NggIoz 0RrbBfo8QM2LHSCLbk0B6RJfY/Pa3lE= Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-300-WUmL9-z7OB6sq7QqSmar2w-1; Fri, 07 May 2021 02:32:07 -0400 X-MC-Unique: WUmL9-z7OB6sq7QqSmar2w-1 Received: from smtp.corp.redhat.com (int-mx04.intmail.prod.int.phx2.redhat.com [10.5.11.14]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id 07B2C800D62; Fri, 7 May 2021 06:32:06 +0000 (UTC) Received: from gshan.redhat.com (vpn2-54-42.bne.redhat.com [10.64.54.42]) by smtp.corp.redhat.com (Postfix) with ESMTP id 691245D9DE; Fri, 7 May 2021 06:32:02 +0000 (UTC) From: Gavin Shan To: kvmarm@lists.cs.columbia.edu Cc: linux-kernel@vger.kernel.org, maz@kernel.org, will@kernel.org, pbonzini@redhat.com, james.morse@arm.com, mark.rutland@arm.com, Jonathan.Cameron@huawei.com, shan.gavin@gmail.com Subject: [PATCH v3 09/21] KVM: arm64: Support SDEI_EVENT_GET_INFO hypercall Date: Fri, 7 May 2021 16:31:12 +0800 Message-Id: <20210507083124.43347-10-gshan@redhat.com> In-Reply-To: <20210507083124.43347-1-gshan@redhat.com> References: <20210507083124.43347-1-gshan@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-Scanned-By: MIMEDefang 2.79 on 10.5.11.14 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org This supports SDEI_EVENT_GET_INFO hypercall. It's used by the guest to retrieve various information about the supported (exported) events, including type, signaled, route mode and affinity for the shared events. Signed-off-by: Gavin Shan --- arch/arm64/kvm/sdei.c | 76 +++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 76 insertions(+) diff --git a/arch/arm64/kvm/sdei.c b/arch/arm64/kvm/sdei.c index b95b8c4455e1..5dfa74b093f1 100644 --- a/arch/arm64/kvm/sdei.c +++ b/arch/arm64/kvm/sdei.c @@ -415,6 +415,80 @@ static unsigned long kvm_sdei_hypercall_status(struct kvm_vcpu *vcpu) return ret; } +static unsigned long kvm_sdei_hypercall_info(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_event *kse = NULL; + struct kvm_sdei_kvm_event *kske = NULL; + unsigned long event_num = smccc_get_arg1(vcpu); + unsigned long event_info = smccc_get_arg2(vcpu); + unsigned long ret = SDEI_SUCCESS; + + /* Sanity check */ + if (!(ksdei && vsdei)) { + ret = SDEI_NOT_SUPPORTED; + goto out; + } + + if (!kvm_sdei_is_valid_event_num(event_num)) { + ret = SDEI_INVALID_PARAMETERS; + goto out; + } + + /* + * Check if the KVM event exists. The event might have been + * registered, we need fetch the information from the registered + * event in that case. + */ + spin_lock(&ksdei->lock); + kske = kvm_sdei_find_kvm_event(kvm, event_num); + kse = kske ? kske->kse : NULL; + if (!kse) { + kse = kvm_sdei_find_event(kvm, event_num); + if (!kse) { + ret = SDEI_INVALID_PARAMETERS; + goto unlock; + } + } + + /* Retrieve the requested information */ + switch (event_info) { + case SDEI_EVENT_INFO_EV_TYPE: + ret = kse->state.type; + break; + case SDEI_EVENT_INFO_EV_SIGNALED: + ret = kse->state.signaled; + break; + case SDEI_EVENT_INFO_EV_PRIORITY: + ret = kse->state.priority; + break; + case SDEI_EVENT_INFO_EV_ROUTING_MODE: + case SDEI_EVENT_INFO_EV_ROUTING_AFF: + if (kse->state.type != SDEI_EVENT_TYPE_SHARED) { + ret = SDEI_INVALID_PARAMETERS; + break; + } + + if (event_info == SDEI_EVENT_INFO_EV_ROUTING_MODE) { + ret = kske ? kske->state.route_mode : + SDEI_EVENT_REGISTER_RM_ANY; + } else { + ret = kske ? kske->state.route_affinity : 0; + } + + break; + default: + ret = SDEI_INVALID_PARAMETERS; + } + +unlock: + spin_unlock(&ksdei->lock); +out: + return ret; +} + int kvm_sdei_hypercall(struct kvm_vcpu *vcpu) { u32 func = smccc_get_function(vcpu); @@ -446,6 +520,8 @@ int kvm_sdei_hypercall(struct kvm_vcpu *vcpu) ret = kvm_sdei_hypercall_status(vcpu); break; case SDEI_1_0_FN_SDEI_EVENT_GET_INFO: + ret = kvm_sdei_hypercall_info(vcpu); + break; case SDEI_1_0_FN_SDEI_EVENT_ROUTING_SET: case SDEI_1_0_FN_SDEI_PE_MASK: case SDEI_1_0_FN_SDEI_PE_UNMASK: -- 2.23.0