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 7B0A9C433EF for ; Sun, 3 Apr 2022 15:41:18 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1359273AbiDCPmu (ORCPT ); Sun, 3 Apr 2022 11:42:50 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:41242 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1359249AbiDCPmq (ORCPT ); Sun, 3 Apr 2022 11:42:46 -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 63C413968C for ; Sun, 3 Apr 2022 08:40:52 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1649000451; 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=845WvNiklQhaA5N8dsHhYvh4+Oz8svlNTDz8uRoZK4Q=; b=VkJdlp1ozNGFFSYtYfdw9tCgflkvEIy8b6y9QWv6YdBpdCOpW+2+zY6d2APYpG4kpF4byL 31OTqlCV4PHZaIWxGNLHIhzE5lGtG0ijvqlh5BB/uKiEoUtJZX6wRXAsl9bbSGI2ce+FHF BxHf1oVtsbOwbpGTOa61q69IH0Jw9Dg= 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-612-ct3-QfrSMt-7IHB_MlW_2w-1; Sun, 03 Apr 2022 11:40:48 -0400 X-MC-Unique: ct3-QfrSMt-7IHB_MlW_2w-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 66E6F858EEC; Sun, 3 Apr 2022 15:40:47 +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 3FD7A4538D7; Sun, 3 Apr 2022 15:40:40 +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 11/18] KVM: arm64: Support SDEI_{PRIVATE, SHARED}_RESET Date: Sun, 3 Apr 2022 23:39:04 +0800 Message-Id: <20220403153911.12332-12-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_{PRIVATE, SHARED}_RESET. They are used by the guest to reset the private events on the calling vCPU or the shared events on all vCPUs. The shared event isn't supported yet, we simply returns SDEI_SUCCESS as the guest doesn't know it. It can't stop the guest from using SDEI service. Signed-off-by: Gavin Shan --- arch/arm64/kvm/sdei.c | 36 ++++++++++++++++++++++++++++++++++++ 1 file changed, 36 insertions(+) diff --git a/arch/arm64/kvm/sdei.c b/arch/arm64/kvm/sdei.c index 3aca36e7e27b..6716ed020aa2 100644 --- a/arch/arm64/kvm/sdei.c +++ b/arch/arm64/kvm/sdei.c @@ -352,6 +352,36 @@ static unsigned long hypercall_mask(struct kvm_vcpu *vcpu, bool mask) return ret; } +static unsigned long hypercall_reset(struct kvm_vcpu *vcpu, bool private) +{ + struct kvm_sdei_vcpu *vsdei = vcpu->arch.sdei; + struct kvm_sdei_event *event; + unsigned int i; + unsigned long ret = SDEI_SUCCESS; + + /* + * All events, which have been registered, should be private + * because the shared events aren't supported yet, so we needn't + * do anything to reset the shared events. + */ + if (!private) + return ret; + + spin_lock(&vsdei->lock); + + kvm_sdei_for_each_event(vsdei, event, i) { + if (!kvm_sdei_is_registered(event)) + continue; + + if (reset_event(vcpu, event)) + ret = SDEI_PENDING; + } + + spin_unlock(&vsdei->lock); + + return ret; +} + int kvm_sdei_call(struct kvm_vcpu *vcpu) { struct kvm_sdei_vcpu *vsdei = vcpu->arch.sdei; @@ -400,6 +430,12 @@ 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_0_FN_SDEI_PRIVATE_RESET: + ret = hypercall_reset(vcpu, true); + break; + case SDEI_1_0_FN_SDEI_SHARED_RESET: + ret = hypercall_reset(vcpu, false); + break; default: ret = SDEI_NOT_SUPPORTED; } -- 2.23.0