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[2620:137:e000::1:20]) by mx.google.com with ESMTP id nc31-20020a1709071c1f00b006df76385ed4si11922635ejc.884.2022.03.22.01.23.10; Tue, 22 Mar 2022 01:23:36 -0700 (PDT) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20; Authentication-Results: mx.google.com; dkim=pass header.i=@redhat.com header.s=mimecast20190719 header.b=IRJD8jJU; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=redhat.com Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230062AbiCVIKo (ORCPT + 99 others); Tue, 22 Mar 2022 04:10:44 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:54262 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229985AbiCVIKe (ORCPT ); Tue, 22 Mar 2022 04:10:34 -0400 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.129.124]) by lindbergh.monkeyblade.net (Postfix) with ESMTP id 21AC626F3 for ; Tue, 22 Mar 2022 01:09:02 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1647936542; 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=fTnMxADpXxnYuQkzViZbgk/aAQ/eKV1ZLVLzIbtgdgU=; b=IRJD8jJUHT+4OR81WJWXjXvK6G1a+WpdQjCnH1Z/4JsQXMs0StxGE5a6Y8suAhn/7Ec7n9 hcimO9JLnTmEtqT7W1UxNsmmSUubxWc07OGnnUdfw2K4WHBYxbU0TAQhoSlyQk4nIB2Enc cbVZ228PMvBYM5HqZYbI6zODWHbYbeQ= Received: from mimecast-mx02.redhat.com (mimecast-mx02.redhat.com [66.187.233.88]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id us-mta-155-bvRgHREHPe-x5Yy-r3kExA-1; Tue, 22 Mar 2022 04:08:58 -0400 X-MC-Unique: bvRgHREHPe-x5Yy-r3kExA-1 Received: from smtp.corp.redhat.com (int-mx03.intmail.prod.int.rdu2.redhat.com [10.11.54.3]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx02.redhat.com (Postfix) with ESMTPS id 485DD8038E3; Tue, 22 Mar 2022 08:08:58 +0000 (UTC) Received: from gshan.redhat.com (ovpn-12-33.pek2.redhat.com [10.72.12.33]) by smtp.corp.redhat.com (Postfix) with ESMTPS id C40281121324; Tue, 22 Mar 2022 08:08:52 +0000 (UTC) From: Gavin Shan To: kvmarm@lists.cs.columbia.edu Cc: linux-kernel@vger.kernel.org, eauger@redhat.com, shannon.zhaosl@gmail.com, maz@kernel.org, Jonathan.Cameron@huawei.com, will@kernel.org, pbonzini@redhat.com, james.morse@arm.com, mark.rutland@arm.com, drjones@redhat.com, vkuznets@redhat.com, shan.gavin@gmail.com Subject: [PATCH v5 08/22] KVM: arm64: Support SDEI_EVENT_STATUS hypercall Date: Tue, 22 Mar 2022 16:06:56 +0800 Message-Id: <20220322080710.51727-9-gshan@redhat.com> In-Reply-To: <20220322080710.51727-1-gshan@redhat.com> References: <20220322080710.51727-1-gshan@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-Scanned-By: MIMEDefang 2.78 on 10.11.54.3 X-Spam-Status: No, score=-3.3 required=5.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,RCVD_IN_DNSWL_NONE, RCVD_IN_MSPIKE_H4,RCVD_IN_MSPIKE_WL,SPF_HELO_NONE,SPF_NONE, T_SCC_BODY_TEXT_LINE autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org This supports SDEI_EVENT_STATUS hypercall. It's used by the guest to retrieve the status about the specified SDEI event. A bitmap is returned to indicate the corresponding status, including registration, enablement and delivery state. Signed-off-by: Gavin Shan --- arch/arm64/kvm/sdei.c | 42 ++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 42 insertions(+) diff --git a/arch/arm64/kvm/sdei.c b/arch/arm64/kvm/sdei.c index 36eda31e0392..5c43c8912ea1 100644 --- a/arch/arm64/kvm/sdei.c +++ b/arch/arm64/kvm/sdei.c @@ -454,6 +454,46 @@ static unsigned long hypercall_unregister(struct kvm_vcpu *vcpu) return ret; } +static unsigned long hypercall_status(struct kvm_vcpu *vcpu) +{ + struct kvm *kvm = vcpu->kvm; + struct kvm_sdei_kvm *ksdei = kvm->arch.sdei; + struct kvm_sdei_exposed_event *exposed_event; + struct kvm_sdei_registered_event *registered_event; + unsigned long event_num = smccc_get_arg1(vcpu); + int index; + unsigned long ret = 0; + + if (!kvm_sdei_is_supported(event_num)) { + ret = SDEI_INVALID_PARAMETERS; + goto out; + } + + spin_lock(&ksdei->lock); + + /* + * Check if the registered event exists. None of the flags + * will be set if it doesn't exist. + */ + registered_event = find_registered_event(kvm, event_num); + if (!registered_event) + goto unlock; + + exposed_event = registered_event->exposed_event; + index = kvm_sdei_vcpu_index(vcpu, exposed_event); + if (kvm_sdei_is_registered(registered_event, index)) + ret |= (1UL << SDEI_EVENT_STATUS_REGISTERED); + if (kvm_sdei_is_enabled(registered_event, index)) + ret |= (1UL << SDEI_EVENT_STATUS_ENABLED); + if (registered_event->vcpu_event_count > 0) + ret |= (1UL << SDEI_EVENT_STATUS_RUNNING); + +unlock: + spin_unlock(&ksdei->lock); +out: + return ret; +} + int kvm_sdei_hypercall(struct kvm_vcpu *vcpu) { struct kvm *kvm = vcpu->kvm; @@ -500,6 +540,8 @@ int kvm_sdei_hypercall(struct kvm_vcpu *vcpu) ret = hypercall_unregister(vcpu); break; case SDEI_1_0_FN_SDEI_EVENT_STATUS: + ret = hypercall_status(vcpu); + break; case SDEI_1_0_FN_SDEI_EVENT_GET_INFO: case SDEI_1_0_FN_SDEI_EVENT_ROUTING_SET: case SDEI_1_0_FN_SDEI_PE_MASK: -- 2.23.0