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 X-Spam-Level: X-Spam-Status: No, score=-13.6 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id AAF1BC4338F for ; Sun, 15 Aug 2021 00:14:59 +0000 (UTC) Received: from mm01.cs.columbia.edu (mm01.cs.columbia.edu [128.59.11.253]) by mail.kernel.org (Postfix) with ESMTP id 58E7360FC1 for ; Sun, 15 Aug 2021 00:14:59 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.1 mail.kernel.org 58E7360FC1 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=redhat.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=lists.cs.columbia.edu Received: from localhost (localhost [127.0.0.1]) by mm01.cs.columbia.edu (Postfix) with ESMTP id 02F064A523; Sat, 14 Aug 2021 20:14:59 -0400 (EDT) X-Virus-Scanned: at lists.cs.columbia.edu Authentication-Results: mm01.cs.columbia.edu (amavisd-new); dkim=softfail (fail, message has been altered) header.i=@redhat.com Received: from mm01.cs.columbia.edu ([127.0.0.1]) by localhost (mm01.cs.columbia.edu [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id 2KqvMrzJ294J; Sat, 14 Aug 2021 20:14:55 -0400 (EDT) Received: from mm01.cs.columbia.edu (localhost [127.0.0.1]) by mm01.cs.columbia.edu (Postfix) with ESMTP id 6FE4E4B0C2; Sat, 14 Aug 2021 20:14:54 -0400 (EDT) Received: from localhost (localhost [127.0.0.1]) by mm01.cs.columbia.edu (Postfix) with ESMTP id DC9DB4AEE2 for ; Sat, 14 Aug 2021 20:14:53 -0400 (EDT) X-Virus-Scanned: at lists.cs.columbia.edu Received: from mm01.cs.columbia.edu ([127.0.0.1]) by localhost (mm01.cs.columbia.edu [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id 9lu0QdolJSYQ for ; Sat, 14 Aug 2021 20:14:53 -0400 (EDT) Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [216.205.24.124]) by mm01.cs.columbia.edu (Postfix) with ESMTP id 9E2FE4B0D4 for ; Sat, 14 Aug 2021 20:14:52 -0400 (EDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1628986492; 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=iEhGG0hnD1JDiId4QQ1JcUjDqHGQb063cTr4+JPyYkw=; b=JxKpxAIF9mwzMceK/m3T7kn0AnDdCGlcrmcQ7kLje90q2mvaRzBZgPl20BG0CeNUsJPRW4 W0boIHMFhFTD4zFQsPviz79h10cd7fZ/pcSGwnZyjSBTvJSqQITqv/IJFVb+COYxk6/+o7 KDSFJ/QOYY+0Qzl3EZIzm2Ut/nZxweU= Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-509-Kn7aLsCnPGOB51pYeTnCAQ-1; Sat, 14 Aug 2021 20:14:51 -0400 X-MC-Unique: Kn7aLsCnPGOB51pYeTnCAQ-1 Received: from smtp.corp.redhat.com (int-mx07.intmail.prod.int.phx2.redhat.com [10.5.11.22]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id 9498B801AC0; Sun, 15 Aug 2021 00:14:49 +0000 (UTC) Received: from gshan.redhat.com (vpn2-54-103.bne.redhat.com [10.64.54.103]) by smtp.corp.redhat.com (Postfix) with ESMTPS id 1FD7210016FF; Sun, 15 Aug 2021 00:14:44 +0000 (UTC) From: Gavin Shan To: kvmarm@lists.cs.columbia.edu Subject: [PATCH v4 07/21] KVM: arm64: Support SDEI_EVENT_UNREGISTER hypercall Date: Sun, 15 Aug 2021 08:13:38 +0800 Message-Id: <20210815001352.81927-8-gshan@redhat.com> In-Reply-To: <20210815001352.81927-1-gshan@redhat.com> References: <20210815001352.81927-1-gshan@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.84 on 10.5.11.22 Cc: maz@kernel.org, linux-kernel@vger.kernel.org, Jonathan.Cameron@huawei.com, pbonzini@redhat.com, will@kernel.org X-BeenThere: kvmarm@lists.cs.columbia.edu X-Mailman-Version: 2.1.14 Precedence: list List-Id: Where KVM/ARM decisions are made List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: kvmarm-bounces@lists.cs.columbia.edu Sender: kvmarm-bounces@lists.cs.columbia.edu This supports SDEI_EVENT_UNREGISTER hypercall. It's used by the guest to unregister SDEI event. The SDEI event won't be raised to the guest or specific vCPU after it's unregistered successfully. It's notable the SDEI event is disabled automatically on the guest or specific vCPU once it's unregistered successfully. Signed-off-by: Gavin Shan --- arch/arm64/kvm/sdei.c | 61 +++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 61 insertions(+) diff --git a/arch/arm64/kvm/sdei.c b/arch/arm64/kvm/sdei.c index b4162efda470..a3ba69dc91cb 100644 --- a/arch/arm64/kvm/sdei.c +++ b/arch/arm64/kvm/sdei.c @@ -308,6 +308,65 @@ static unsigned long kvm_sdei_hypercall_context(struct kvm_vcpu *vcpu) return ret; } +static unsigned long kvm_sdei_hypercall_unregister(struct kvm_vcpu *vcpu) +{ + struct kvm *kvm = vcpu->kvm; + struct kvm_sdei_kvm *ksdei = kvm->arch.sdei; + struct kvm_sdei_vcpu *vsdei = vcpu->arch.sdei; + struct kvm_sdei_event *kse = NULL; + struct kvm_sdei_kvm_event *kske = NULL; + unsigned long event_num = smccc_get_arg1(vcpu); + int index = 0; + unsigned long ret = SDEI_SUCCESS; + + /* Sanity check */ + if (!(ksdei && vsdei)) { + ret = SDEI_NOT_SUPPORTED; + goto out; + } + + if (!kvm_sdei_is_valid_event_num(event_num)) { + ret = SDEI_INVALID_PARAMETERS; + goto out; + } + + /* Check if the KVM event exists */ + spin_lock(&ksdei->lock); + kske = kvm_sdei_find_kvm_event(kvm, event_num); + if (!kske) { + ret = SDEI_INVALID_PARAMETERS; + goto unlock; + } + + /* Check if there is pending events */ + if (kske->state.refcount) { + ret = SDEI_PENDING; + goto unlock; + } + + /* Check if it has been registered */ + kse = kske->kse; + index = (kse->state.type == SDEI_EVENT_TYPE_PRIVATE) ? + vcpu->vcpu_idx : 0; + if (!kvm_sdei_is_registered(kske, index)) { + ret = SDEI_DENIED; + goto unlock; + } + + /* The event is disabled when it's unregistered */ + kvm_sdei_clear_enabled(kske, index); + kvm_sdei_clear_registered(kske, index); + if (kvm_sdei_empty_registered(kske)) { + list_del(&kske->link); + kfree(kske); + } + +unlock: + spin_unlock(&ksdei->lock); +out: + return ret; +} + int kvm_sdei_hypercall(struct kvm_vcpu *vcpu) { u32 func = smccc_get_function(vcpu); @@ -333,6 +392,8 @@ int kvm_sdei_hypercall(struct kvm_vcpu *vcpu) case SDEI_1_0_FN_SDEI_EVENT_COMPLETE: case SDEI_1_0_FN_SDEI_EVENT_COMPLETE_AND_RESUME: case SDEI_1_0_FN_SDEI_EVENT_UNREGISTER: + ret = kvm_sdei_hypercall_unregister(vcpu); + break; case SDEI_1_0_FN_SDEI_EVENT_STATUS: case SDEI_1_0_FN_SDEI_EVENT_GET_INFO: case SDEI_1_0_FN_SDEI_EVENT_ROUTING_SET: -- 2.23.0 _______________________________________________ kvmarm mailing list kvmarm@lists.cs.columbia.edu https://lists.cs.columbia.edu/mailman/listinfo/kvmarm