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 EF45BC433F5 for ; Fri, 27 May 2022 08:05:39 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1349033AbiE0IFi (ORCPT ); Fri, 27 May 2022 04:05:38 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:55598 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S240023AbiE0IE4 (ORCPT ); Fri, 27 May 2022 04:04:56 -0400 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.133.124]) by lindbergh.monkeyblade.net (Postfix) with ESMTP id 5367D10275F for ; Fri, 27 May 2022 01:04:54 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1653638693; 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=Two26LWqm11I3Z4UV+vVjj4R+s2XokxqwlwfmiyoUok=; b=ALK2nO4gTesCV0WW7g9YkrWjD/qQUICeSDJ0jDJizi8r9+WEo54YXTqntYyXdtOmOZ9G2r y+sfi6XuEzbWw73GZtprBEYe9j8l9z4vbiuf8cwyOJzqvpUFWh+hndumpH0y9a33ITm2Ta fhqHPwOYYcbRVbxmAJ4Wr7Q4jk1orU0= 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-122-3mnuTZQHPOCrMuMea_WNNw-1; Fri, 27 May 2022 04:04:49 -0400 X-MC-Unique: 3mnuTZQHPOCrMuMea_WNNw-1 Received: from smtp.corp.redhat.com (int-mx04.intmail.prod.int.rdu2.redhat.com [10.11.54.4]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx02.redhat.com (Postfix) with ESMTPS id 530E780A0B5; Fri, 27 May 2022 08:04:48 +0000 (UTC) Received: from gshan.redhat.com (ovpn-12-91.pek2.redhat.com [10.72.12.91]) by smtp.corp.redhat.com (Postfix) with ESMTPS id A35432026D64; Fri, 27 May 2022 08:04:41 +0000 (UTC) From: Gavin Shan To: kvmarm@lists.cs.columbia.edu Cc: maz@kernel.org, linux-kernel@vger.kernel.org, eauger@redhat.com, oupton@google.com, Jonathan.Cameron@huawei.com, pbonzini@redhat.com, vkuznets@redhat.com, will@kernel.org, james.morse@arm.com, mark.rutland@arm.com, shannon.zhaosl@gmail.com, shijie@amperemail.onmicrosoft.com, shan.gavin@gmail.com Subject: [PATCH v7 08/22] KVM: arm64: Support EVENT_STATUS hypercall Date: Fri, 27 May 2022 16:02:39 +0800 Message-Id: <20220527080253.1562538-9-gshan@redhat.com> In-Reply-To: <20220527080253.1562538-1-gshan@redhat.com> References: <20220527080253.1562538-1-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 10.11.54.4 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org This supports EVENT_STATUS hypercall. It's used to retrieve the status about the specified event. A bitmap is returned to represent the event status, which includes state of registration, enablement, and running. Signed-off-by: Gavin Shan --- arch/arm64/kvm/sdei.c | 22 ++++++++++++++++++++++ 1 file changed, 22 insertions(+) diff --git a/arch/arm64/kvm/sdei.c b/arch/arm64/kvm/sdei.c index b44ab302732d..377341f229da 100644 --- a/arch/arm64/kvm/sdei.c +++ b/arch/arm64/kvm/sdei.c @@ -118,6 +118,25 @@ static unsigned long event_unregister(struct kvm_vcpu *vcpu) return SDEI_SUCCESS; } +static unsigned long event_status(struct kvm_vcpu *vcpu) +{ + struct kvm_sdei_vcpu *vsdei = vcpu->arch.sdei; + unsigned int num = smccc_get_arg(vcpu, 1); + unsigned long ret = 0; + + if (num >= KVM_NR_SDEI_EVENTS) + return SDEI_INVALID_PARAMETERS; + + if (test_bit(num, &vsdei->registered)) + ret |= (1UL << SDEI_EVENT_STATUS_REGISTERED); + if (test_bit(num, &vsdei->enabled)) + ret |= (1UL << SDEI_EVENT_STATUS_ENABLED); + if (test_bit(num, &vsdei->running)) + ret |= (1UL << SDEI_EVENT_STATUS_RUNNING); + + return ret; +} + int kvm_sdei_call(struct kvm_vcpu *vcpu) { struct kvm_sdei_vcpu *vsdei = vcpu->arch.sdei; @@ -151,6 +170,9 @@ int kvm_sdei_call(struct kvm_vcpu *vcpu) case SDEI_1_0_FN_SDEI_EVENT_UNREGISTER: ret = event_unregister(vcpu); break; + case SDEI_1_0_FN_SDEI_EVENT_STATUS: + ret = event_status(vcpu); + break; default: ret = SDEI_NOT_SUPPORTED; } -- 2.23.0