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 D33AEC433EF for ; Sun, 3 Apr 2022 15:40:40 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1359221AbiDCPmd (ORCPT ); Sun, 3 Apr 2022 11:42:33 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:39766 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1359248AbiDCPm0 (ORCPT ); Sun, 3 Apr 2022 11:42:26 -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 5325C2BB26 for ; Sun, 3 Apr 2022 08:40:32 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1649000431; 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=8gXYZwt3oa1TLxdRQmFVOYT1n1r/hpVr+I1ttZPkVUo=; b=gfW6boiAd9aYhaCP4FhP2KrqOc8Ph/lxjcwnL4+vnDAH8Anw71DjSfJMMhf1HEeWGrlZWI O4phgMu0sEG2SXFZxTr2nieXdAYWturi8wKgXjlHXI+s6v/B2OOq80vb//mg0jvmqqmYT0 hCWqWVPD9Y90oTmGusuMrOf5kE8n4SM= Received: from mimecast-mx02.redhat.com (mx3-rdu2.redhat.com [66.187.233.73]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id us-mta-29-x_1FQuIINQis-IQ714WaUQ-1; Sun, 03 Apr 2022 11:40:27 -0400 X-MC-Unique: x_1FQuIINQis-IQ714WaUQ-1 Received: from smtp.corp.redhat.com (int-mx10.intmail.prod.int.rdu2.redhat.com [10.11.54.10]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx02.redhat.com (Postfix) with ESMTPS id CD0891C04B41; Sun, 3 Apr 2022 15:40:26 +0000 (UTC) Received: from gshan.redhat.com (ovpn-12-82.pek2.redhat.com [10.72.12.82]) by smtp.corp.redhat.com (Postfix) with ESMTPS id F0C354538D7; Sun, 3 Apr 2022 15:40:20 +0000 (UTC) From: Gavin Shan To: kvmarm@lists.cs.columbia.edu Cc: linux-kernel@vger.kernel.org, eauger@redhat.com, oupton@google.com, Jonathan.Cameron@huawei.com, vkuznets@redhat.com, will@kernel.org, shannon.zhaosl@gmail.com, james.morse@arm.com, mark.rutland@arm.com, maz@kernel.org, pbonzini@redhat.com, shan.gavin@gmail.com Subject: [PATCH v6 08/18] KVM: arm64: Support SDEI_EVENT_STATUS hypercall Date: Sun, 3 Apr 2022 23:39:01 +0800 Message-Id: <20220403153911.12332-9-gshan@redhat.com> In-Reply-To: <20220403153911.12332-1-gshan@redhat.com> References: <20220403153911.12332-1-gshan@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-Scanned-By: MIMEDefang 2.85 on 10.11.54.10 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org This supports SDEI_EVENT_STATUS hypercall. It's used by guest to retrieve the status about the specified event. A bitmap is returned to indicate the corresponding status: registration, enablement and servicing state. Signed-off-by: Gavin Shan --- arch/arm64/kvm/sdei.c | 45 +++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 45 insertions(+) diff --git a/arch/arm64/kvm/sdei.c b/arch/arm64/kvm/sdei.c index f774f2cf0ac7..b847c6028b74 100644 --- a/arch/arm64/kvm/sdei.c +++ b/arch/arm64/kvm/sdei.c @@ -247,6 +247,48 @@ static unsigned long hypercall_unregister(struct kvm_vcpu *vcpu) return ret; } +static unsigned long hypercall_status(struct kvm_vcpu *vcpu) +{ + struct kvm_sdei_vcpu *vsdei = vcpu->arch.sdei; + struct kvm_sdei_vcpu_context *context; + struct kvm_sdei_exposed_event *exposed_event; + struct kvm_sdei_event *event; + unsigned int num = smccc_get_arg(vcpu, 1); + unsigned long ret = 0; + + if (!kvm_sdei_is_supported(num)) { + ret = SDEI_INVALID_PARAMETERS; + goto out; + } + + spin_lock(&vsdei->lock); + + /* + * Check if the event exists. None of the flags will be set + * if it doesn't exist. + */ + event = find_event(vcpu, num); + if (!event) + goto unlock; + + if (kvm_sdei_is_registered(event)) + ret |= (1UL << SDEI_EVENT_STATUS_REGISTERED); + if (kvm_sdei_is_enabled(event)) + ret |= (1UL << SDEI_EVENT_STATUS_ENABLED); + + exposed_event = event->exposed_event; + context = kvm_sdei_is_critical(exposed_event->priority) ? + &vsdei->context[SDEI_EVENT_PRIORITY_CRITICAL] : + &vsdei->context[SDEI_EVENT_PRIORITY_NORMAL]; + if (context->event == event) + ret |= (1UL << SDEI_EVENT_STATUS_RUNNING); + +unlock: + spin_unlock(&vsdei->lock); +out: + return ret; +} + int kvm_sdei_call(struct kvm_vcpu *vcpu) { struct kvm_sdei_vcpu *vsdei = vcpu->arch.sdei; @@ -283,6 +325,9 @@ int kvm_sdei_call(struct kvm_vcpu *vcpu) case SDEI_1_0_FN_SDEI_EVENT_UNREGISTER: ret = hypercall_unregister(vcpu); break; + case SDEI_1_0_FN_SDEI_EVENT_STATUS: + ret = hypercall_status(vcpu); + break; default: ret = SDEI_NOT_SUPPORTED; } -- 2.23.0