From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753675AbeB0Oau (ORCPT ); Tue, 27 Feb 2018 09:30:50 -0500 Received: from mx0a-001b2d01.pphosted.com ([148.163.156.1]:35206 "EHLO mx0a-001b2d01.pphosted.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753628AbeB0Oar (ORCPT ); Tue, 27 Feb 2018 09:30:47 -0500 From: Tony Krowiak To: linux-s390@vger.kernel.org, linux-kernel@vger.kernel.org, kvm@vger.kernel.org Cc: freude@de.ibm.com, schwidefsky@de.ibm.com, heiko.carstens@de.ibm.com, borntraeger@de.ibm.com, cohuck@redhat.com, kwankhede@nvidia.com, bjsdjshi@linux.vnet.ibm.com, pbonzini@redhat.com, alex.williamson@redhat.com, pmorel@linux.vnet.ibm.com, alifm@linux.vnet.ibm.com, mjrosato@linux.vnet.ibm.com, jjherne@linux.vnet.ibm.com, thuth@redhat.com, pasic@linux.vnet.ibm.com, fiuczy@linux.vnet.ibm.com, buendgen@de.ibm.com, Tony Krowiak Subject: [PATCH v2 03/15] s390: zcrypt: externalize AP instructions available function Date: Tue, 27 Feb 2018 09:28:01 -0500 X-Mailer: git-send-email 1.7.1 In-Reply-To: <1519741693-17440-1-git-send-email-akrowiak@linux.vnet.ibm.com> References: <1519741693-17440-1-git-send-email-akrowiak@linux.vnet.ibm.com> X-TM-AS-GCONF: 00 x-cbid: 18022714-0028-0000-0000-0000093B1DA0 X-IBM-SpamModules-Scores: X-IBM-SpamModules-Versions: BY=3.00008601; HX=3.00000241; KW=3.00000007; PH=3.00000004; SC=3.00000254; SDB=6.00995862; UDB=6.00506230; IPR=6.00775186; MB=3.00019761; MTD=3.00000008; XFM=3.00000015; UTC=2018-02-27 14:28:35 X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 18022714-0029-0000-0000-000039C4BF50 Message-Id: <1519741693-17440-4-git-send-email-akrowiak@linux.vnet.ibm.com> X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10432:,, definitions=2018-02-27_05:,, signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 priorityscore=1501 malwarescore=0 suspectscore=0 phishscore=0 bulkscore=0 spamscore=0 clxscore=1015 lowpriorityscore=0 impostorscore=0 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1709140000 definitions=main-1802270183 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org If the AP instructions are not available on the linux host, then AP devices can not be interpreted by the SIE. The AP bus has a function it uses to determine if the AP instructions are available. This patch provides a new function that wraps the AP bus's function to externalize it for use by KVM. Signed-off-by: Tony Krowiak Reviewed-by: Pierre Morel --- arch/s390/include/asm/ap.h | 7 +++++++ drivers/s390/crypto/ap_bus.c | 6 ++++++ 2 files changed, 13 insertions(+), 0 deletions(-) diff --git a/arch/s390/include/asm/ap.h b/arch/s390/include/asm/ap.h index cfce683..1df6b59 100644 --- a/arch/s390/include/asm/ap.h +++ b/arch/s390/include/asm/ap.h @@ -120,4 +120,11 @@ struct ap_queue_status ap_queue_irq_ctrl(ap_qid_t qid, struct ap_qirq_ctrl qirqctrl, void *ind); +/** + * ap_instructions_installed() - Tests whether AP instructions are installed + * + * Returns 1 if the AP instructions are installed, otherwise; returns 0 + */ +int ap_instructions_installed(void); + #endif /* _ASM_S390_AP_H_ */ diff --git a/drivers/s390/crypto/ap_bus.c b/drivers/s390/crypto/ap_bus.c index 48d55dc..089b1cf 100644 --- a/drivers/s390/crypto/ap_bus.c +++ b/drivers/s390/crypto/ap_bus.c @@ -211,6 +211,12 @@ int ap_query_configuration(struct ap_config_info *info) } EXPORT_SYMBOL(ap_query_configuration); +int ap_instructions_installed(void) +{ + return (ap_instructions_available() == 0); +} +EXPORT_SYMBOL(ap_instructions_installed); + /** * ap_init_configuration(): Allocate and query configuration array. */ -- 1.7.1