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 BA244C433F5 for ; Fri, 27 May 2022 08:04:35 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230489AbiE0IEc (ORCPT ); Fri, 27 May 2022 04:04:32 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:54472 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1348519AbiE0IEX (ORCPT ); Fri, 27 May 2022 04:04:23 -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 AC573FF5B2 for ; Fri, 27 May 2022 01:04:19 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1653638658; 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=P4jpm8XSirJ1238sxZZHFV9+DDVhOPJcfnDADqydjXI=; b=NpxKsnCvkGm1GG+2dOkHIGJ5qexVpAk5pFDWQHNKMy1nO7Qbs0m6H6iSpkS/xumr9fIqnG hgHTuPxoCI/y5A3Ak2bk6DU9fQj+ctgS02GoVVyqhGd5iyzmPe9KYyWuT3YDqOH5QgCAFt 2ykSTvLgcMXkmJQyiVwigN67TNgEh24= 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-5-M6zTRbdCOiKQyGV6iliAuA-1; Fri, 27 May 2022 04:04:14 -0400 X-MC-Unique: M6zTRbdCOiKQyGV6iliAuA-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 04D042949BAE; Fri, 27 May 2022 08:04:14 +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 A90A42026D64; Fri, 27 May 2022 08:04:07 +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 04/22] KVM: arm64: Support EVENT_REGISTER hypercall Date: Fri, 27 May 2022 16:02:35 +0800 Message-Id: <20220527080253.1562538-5-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_REGISTER hypercall, which is used by guest to register event. The event won't be raised until it's registered and enabled. There are several cases where the request is injected: * The event isn't supported by KVM * The event has been registered or pending for unregistration * The reserved bits or relative mode are set in @flags argument Signed-off-by: Gavin Shan --- arch/arm64/kvm/sdei.c | 31 +++++++++++++++++++++++++++++++ 1 file changed, 31 insertions(+) diff --git a/arch/arm64/kvm/sdei.c b/arch/arm64/kvm/sdei.c index 0c4415fcad16..40c2d585470d 100644 --- a/arch/arm64/kvm/sdei.c +++ b/arch/arm64/kvm/sdei.c @@ -13,6 +13,34 @@ #include #include +static unsigned long event_register(struct kvm_vcpu *vcpu) +{ + struct kvm_sdei_vcpu *vsdei = vcpu->arch.sdei; + unsigned int num = smccc_get_arg(vcpu, 1); + unsigned long flags = smccc_get_arg(vcpu, 4); + + if (num >= KVM_NR_SDEI_EVENTS) + return SDEI_INVALID_PARAMETERS; + + /* Reject if the reserved bits or relative mode are set */ + if (flags & ~0x1UL) + return SDEI_INVALID_PARAMETERS; + + /* + * Reject if the event has been registered or pending for + * unregistration. + */ + if (test_bit(num, &vsdei->registered) || + test_bit(num, &vsdei->running)) + return SDEI_DENIED; + + vsdei->handlers[num].ep_addr = smccc_get_arg(vcpu, 2); + vsdei->handlers[num].ep_arg = smccc_get_arg(vcpu, 3); + set_bit(num, &vsdei->registered); + + return SDEI_SUCCESS; +} + int kvm_sdei_call(struct kvm_vcpu *vcpu) { struct kvm_sdei_vcpu *vsdei = vcpu->arch.sdei; @@ -31,6 +59,9 @@ int kvm_sdei_call(struct kvm_vcpu *vcpu) } switch (func) { + case SDEI_1_0_FN_SDEI_EVENT_REGISTER: + ret = event_register(vcpu); + break; default: ret = SDEI_NOT_SUPPORTED; } -- 2.23.0