From nobody Tue Feb 10 07:20:07 2026 Delivered-To: importer@patchew.org Received-SPF: pass (zoho.com: domain of gnu.org designates 208.118.235.17 as permitted sender) client-ip=208.118.235.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Authentication-Results: mx.zohomail.com; spf=pass (zoho.com: domain of gnu.org designates 208.118.235.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org Return-Path: Received: from lists.gnu.org (lists.gnu.org [208.118.235.17]) by mx.zohomail.com with SMTPS id 1505751466993775.967288028266; Mon, 18 Sep 2017 09:17:46 -0700 (PDT) Received: from localhost ([::1]:37654 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1dtyjw-0004Qs-SC for importer@patchew.org; Mon, 18 Sep 2017 12:17:44 -0400 Received: from eggs.gnu.org ([2001:4830:134:3::10]:37838) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1dtyUa-0007ZJ-BX for qemu-devel@nongnu.org; Mon, 18 Sep 2017 12:01:58 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1dtyUZ-0008F1-DX for qemu-devel@nongnu.org; Mon, 18 Sep 2017 12:01:52 -0400 Received: from mx1.redhat.com ([209.132.183.28]:56744) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1dtyUZ-0008Eq-7E for qemu-devel@nongnu.org; Mon, 18 Sep 2017 12:01:51 -0400 Received: from smtp.corp.redhat.com (int-mx05.intmail.prod.int.phx2.redhat.com [10.5.11.15]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 3574E2D0FD7; Mon, 18 Sep 2017 16:01:50 +0000 (UTC) Received: from t460s.redhat.com (unknown [10.36.118.72]) by smtp.corp.redhat.com (Postfix) with ESMTP id C2CFB5D6A8; Mon, 18 Sep 2017 16:01:47 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mx1.redhat.com 3574E2D0FD7 Authentication-Results: ext-mx05.extmail.prod.ext.phx2.redhat.com; dmarc=none (p=none dis=none) header.from=redhat.com Authentication-Results: ext-mx05.extmail.prod.ext.phx2.redhat.com; spf=fail smtp.mailfrom=david@redhat.com From: David Hildenbrand To: qemu-devel@nongnu.org Date: Mon, 18 Sep 2017 18:00:04 +0200 Message-Id: <20170918160012.4317-20-david@redhat.com> In-Reply-To: <20170918160012.4317-1-david@redhat.com> References: <20170918160012.4317-1-david@redhat.com> X-Scanned-By: MIMEDefang 2.79 on 10.5.11.15 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.29]); Mon, 18 Sep 2017 16:01:50 +0000 (UTC) X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] [fuzzy] X-Received-From: 209.132.183.28 Subject: [Qemu-devel] [PATCH v1 19/27] s390x/tcg: implement SIGP SENSE X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Matthew Rosato , thuth@redhat.com, david@redhat.com, cohuck@redhat.com, Richard Henderson , Alexander Graf , borntraeger@de.ibm.com, Igor Mammedov , =?UTF-8?q?Alex=20Benn=C3=A9e?= , Aurelien Jarno Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail: RSF_0 Z_629925259 SPT_0 Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Add it as preparation for TCG. Sensing coul later be done completely lockless. Signed-off-by: David Hildenbrand --- target/s390x/sigp.c | 29 +++++++++++++++++++++++++++++ 1 file changed, 29 insertions(+) diff --git a/target/s390x/sigp.c b/target/s390x/sigp.c index c57312b743..063a34ccc7 100644 --- a/target/s390x/sigp.c +++ b/target/s390x/sigp.c @@ -32,6 +32,32 @@ static void set_sigp_status(SigpInfo *si, uint64_t statu= s) si->cc =3D SIGP_CC_STATUS_STORED; } =20 +static void sigp_sense(S390CPU *dst_cpu, SigpInfo *si) +{ + uint8_t state =3D s390_cpu_get_state(dst_cpu); + bool ext_call =3D dst_cpu->env.pending_int & INTERRUPT_EXTERNAL_CALL; + uint64_t status =3D 0; + + if (!tcg_enabled()) { + /* handled in KVM */ + set_sigp_status(si, SIGP_STAT_INVALID_ORDER); + return; + } + + /* sensing without locks is racy, but it's the same for real hw */ + if (state !=3D CPU_STATE_STOPPED && !ext_call) { + si->cc =3D SIGP_CC_ORDER_CODE_ACCEPTED; + } else { + if (ext_call) { + status |=3D SIGP_STAT_EXT_CALL_PENDING; + } + if (state =3D=3D CPU_STATE_STOPPED) { + status |=3D SIGP_STAT_STOPPED; + } + set_sigp_status(si, status); + } +} + static void sigp_start(CPUState *cs, run_on_cpu_data arg) { S390CPU *cpu =3D S390_CPU(cs); @@ -277,6 +303,9 @@ static int handle_sigp_single_dst(S390CPU *dst_cpu, uin= t8_t order, } =20 switch (order) { + case SIGP_SENSE: + sigp_sense(dst_cpu, &si); + break; case SIGP_START: run_on_cpu(CPU(dst_cpu), sigp_start, RUN_ON_CPU_HOST_PTR(&si)); break; --=20 2.13.5