From patchwork Fri Apr 24 10:45:50 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Pierre Morel X-Patchwork-Id: 11507523 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 560C415AB for ; Fri, 24 Apr 2020 10:46:12 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 47E7620776 for ; Fri, 24 Apr 2020 10:46:12 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727029AbgDXKqL (ORCPT ); Fri, 24 Apr 2020 06:46:11 -0400 Received: from mx0a-001b2d01.pphosted.com ([148.163.156.1]:44960 "EHLO mx0a-001b2d01.pphosted.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726770AbgDXKqD (ORCPT ); Fri, 24 Apr 2020 06:46:03 -0400 Received: from pps.filterd (m0098399.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.16.0.42/8.16.0.42) with SMTP id 03OAWFJU097191; Fri, 24 Apr 2020 06:46:03 -0400 Received: from pps.reinject (localhost [127.0.0.1]) by mx0a-001b2d01.pphosted.com with ESMTP id 30jrc6us85-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Fri, 24 Apr 2020 06:46:02 -0400 Received: from m0098399.ppops.net (m0098399.ppops.net [127.0.0.1]) by pps.reinject (8.16.0.36/8.16.0.36) with SMTP id 03OAXI7q102925; Fri, 24 Apr 2020 06:46:02 -0400 Received: from ppma02fra.de.ibm.com (47.49.7a9f.ip4.static.sl-reverse.com [159.122.73.71]) by mx0a-001b2d01.pphosted.com with ESMTP id 30jrc6us6x-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Fri, 24 Apr 2020 06:46:02 -0400 Received: from pps.filterd (ppma02fra.de.ibm.com [127.0.0.1]) by ppma02fra.de.ibm.com (8.16.0.27/8.16.0.27) with SMTP id 03OAjTMq015846; Fri, 24 Apr 2020 10:45:59 GMT Received: from b06avi18626390.portsmouth.uk.ibm.com (b06avi18626390.portsmouth.uk.ibm.com [9.149.26.192]) by ppma02fra.de.ibm.com with ESMTP id 30fs65gwbw-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Fri, 24 Apr 2020 10:45:59 +0000 Received: from d06av23.portsmouth.uk.ibm.com (d06av23.portsmouth.uk.ibm.com [9.149.105.59]) by b06avi18626390.portsmouth.uk.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id 03OAinkQ66191716 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Fri, 24 Apr 2020 10:44:50 GMT Received: from d06av23.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 80A9FA4057; Fri, 24 Apr 2020 10:45:57 +0000 (GMT) Received: from d06av23.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 30452A404D; Fri, 24 Apr 2020 10:45:57 +0000 (GMT) Received: from oc3016276355.ibm.com (unknown [9.145.79.138]) by d06av23.portsmouth.uk.ibm.com (Postfix) with ESMTP; Fri, 24 Apr 2020 10:45:57 +0000 (GMT) From: Pierre Morel To: kvm@vger.kernel.org Cc: linux-s390@vger.kernel.org, frankja@linux.ibm.com, david@redhat.com, thuth@redhat.com, cohuck@redhat.com Subject: [kvm-unit-tests PATCH v6 08/10] s390x: define wfi: wait for interrupt Date: Fri, 24 Apr 2020 12:45:50 +0200 Message-Id: <1587725152-25569-9-git-send-email-pmorel@linux.ibm.com> X-Mailer: git-send-email 1.8.3.1 In-Reply-To: <1587725152-25569-1-git-send-email-pmorel@linux.ibm.com> References: <1587725152-25569-1-git-send-email-pmorel@linux.ibm.com> X-TM-AS-GCONF: 00 X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.138,18.0.676 definitions=2020-04-24_04:2020-04-23,2020-04-24 signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 malwarescore=0 bulkscore=0 mlxlogscore=634 lowpriorityscore=0 spamscore=0 impostorscore=0 clxscore=1015 adultscore=0 phishscore=0 mlxscore=0 suspectscore=1 priorityscore=1501 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2003020000 definitions=main-2004240078 Sender: kvm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org wfi(irq_mask) allows the programm to wait for an interrupt. The interrupt handler is in charge to remove the WAIT bit when it finished handling interrupt. Signed-off-by: Pierre Morel --- lib/s390x/asm/arch_def.h | 11 +++++++++++ 1 file changed, 11 insertions(+) diff --git a/lib/s390x/asm/arch_def.h b/lib/s390x/asm/arch_def.h index a0d2362..e04866c 100644 --- a/lib/s390x/asm/arch_def.h +++ b/lib/s390x/asm/arch_def.h @@ -13,6 +13,7 @@ #define PSW_MASK_EXT 0x0100000000000000UL #define PSW_MASK_DAT 0x0400000000000000UL #define PSW_MASK_SHORT_PSW 0x0008000000000000UL +#define PSW_MASK_WAIT 0x0002000000000000UL #define PSW_MASK_PSTATE 0x0001000000000000UL #define PSW_MASK_BA 0x0000000080000000UL #define PSW_MASK_EA 0x0000000100000000UL @@ -254,6 +255,16 @@ static inline void load_psw_mask(uint64_t mask) : "+r" (tmp) : "a" (&psw) : "memory", "cc" ); } +static inline void wfi(uint64_t irq_mask) +{ + uint64_t psw_mask; + + psw_mask = extract_psw_mask(); + load_psw_mask(psw_mask | irq_mask | PSW_MASK_WAIT); + load_psw_mask(psw_mask); +} + + static inline void enter_pstate(void) { uint64_t mask;