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 38008C433F5 for ; Sun, 3 Apr 2022 15:41:39 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1359295AbiDCPna (ORCPT ); Sun, 3 Apr 2022 11:43:30 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:42594 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1359332AbiDCPnD (ORCPT ); Sun, 3 Apr 2022 11:43:03 -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 1DA812DD61 for ; Sun, 3 Apr 2022 08:41:10 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1649000469; 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=PrMW1GidvsPmhW46oQQCOc/ckEuxqUmXOy5/nPzOjBY=; b=BRFFoZ+iMFZ+w6nl6kdHwD18hEuA56/qL52PApnu46QYLjklYCeXs8f86/0JDdXqPREiGC alznjde/5SWBTuRUs6+a8F5wJjjJfOZYHtoCqpd1CJAIcR8IYe/bl9oTLF1eJxsrPgCpqt qK9eYXFUKpcz7rUqB+KXhoZb0dViujY= 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-633-JnseUGxkPz2hLf1dmAnbPw-1; Sun, 03 Apr 2022 11:41:08 -0400 X-MC-Unique: JnseUGxkPz2hLf1dmAnbPw-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 B58303811A20; Sun, 3 Apr 2022 15:41:07 +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 A7682403172; Sun, 3 Apr 2022 15:41:01 +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 14/18] KVM: arm64: Support SDEI_EVENT_SIGNAL hypercall Date: Sun, 3 Apr 2022 23:39:07 +0800 Message-Id: <20220403153911.12332-15-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_SIGNAL hypercall. It's used by guest to inject event, whose number must be zero to the specified vCPU. As the shared event isn't supported, calling vCPU is assumed to be the target. 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 ebdbe7810cf0..e1f6ab9800ee 100644 --- a/arch/arm64/kvm/sdei.c +++ b/arch/arm64/kvm/sdei.c @@ -455,6 +455,48 @@ static unsigned long hypercall_mask(struct kvm_vcpu *vcpu, bool mask) return ret; } +static unsigned long hypercall_signal(struct kvm_vcpu *vcpu) +{ + struct kvm_sdei_vcpu *vsdei = vcpu->arch.sdei; + struct kvm_sdei_event *event; + unsigned int num = smccc_get_arg(vcpu, 1); + unsigned long ret = SDEI_SUCCESS; + + /* + * The event must be the software signaled one, whose number + * is zero. + */ + if (!kvm_sdei_is_sw_signaled(num)) { + ret = SDEI_INVALID_PARAMETERS; + goto out; + } + + spin_lock(&vsdei->lock); + + /* Check if the vcpu has been masked */ + if (vsdei->masked) { + ret = SDEI_INVALID_PARAMETERS; + goto unlock; + } + + /* Check if the event exists */ + event = find_event(vcpu, num); + if (!event) { + ret = SDEI_INVALID_PARAMETERS; + goto unlock; + } + + if (inject_event(vcpu, event)) { + ret = SDEI_INVALID_PARAMETERS; + goto unlock; + } + +unlock: + spin_unlock(&vsdei->lock); +out: + return ret; +} + static unsigned long hypercall_reset(struct kvm_vcpu *vcpu, bool private) { struct kvm_sdei_vcpu *vsdei = vcpu->arch.sdei; @@ -539,6 +581,9 @@ int kvm_sdei_call(struct kvm_vcpu *vcpu) case SDEI_1_0_FN_SDEI_PE_UNMASK: ret = hypercall_mask(vcpu, false); break; + case SDEI_1_1_FN_SDEI_EVENT_SIGNAL: + ret = hypercall_signal(vcpu); + break; case SDEI_1_0_FN_SDEI_PRIVATE_RESET: ret = hypercall_reset(vcpu, true); break; -- 2.23.0