From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753024AbdJMRpP (ORCPT ); Fri, 13 Oct 2017 13:45:15 -0400 Received: from mx0a-001b2d01.pphosted.com ([148.163.156.1]:50322 "EHLO mx0a-001b2d01.pphosted.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752999AbdJMRkB (ORCPT ); Fri, 13 Oct 2017 13:40:01 -0400 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, qemu-s390x@nongnu.org, jjherne@linux.vnet.ibm.com, thuth@redhat.com, pasic@linux.vnet.ibm.com, Tony Krowiak Subject: [RFC 04/19] s390/zcrypt: create an AP matrix device on the AP matrix bus Date: Fri, 13 Oct 2017 13:38:49 -0400 X-Mailer: git-send-email 1.7.1 In-Reply-To: <1507916344-3896-1-git-send-email-akrowiak@linux.vnet.ibm.com> References: <1507916344-3896-1-git-send-email-akrowiak@linux.vnet.ibm.com> X-TM-AS-GCONF: 00 x-cbid: 17101317-0048-0000-0000-000001F592CB X-IBM-SpamModules-Scores: X-IBM-SpamModules-Versions: BY=3.00007892; HX=3.00000241; KW=3.00000007; PH=3.00000004; SC=3.00000236; SDB=6.00930643; UDB=6.00468501; IPR=6.00710908; BA=6.00005636; NDR=6.00000001; ZLA=6.00000005; ZF=6.00000009; ZB=6.00000000; ZP=6.00000000; ZH=6.00000000; ZU=6.00000002; MB=3.00017529; XFM=3.00000015; UTC=2017-10-13 17:39:58 X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 17101317-0049-0000-0000-000042DC74C8 Message-Id: <1507916344-3896-5-git-send-email-akrowiak@linux.vnet.ibm.com> X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10432:,, definitions=2017-10-13_07:,, signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 spamscore=0 suspectscore=0 malwarescore=0 phishscore=0 adultscore=0 bulkscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1707230000 definitions=main-1710130244 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Creates a single AP matrix device on the AP matrix bus. The matrix device will be created as part of the AP matrix bus initialization. The matrix device will hold the AP queues that have been reserved for use by KVM guests. Mediated matrix devices can then be created for each guest. The mediated matrix devices can then be configured with a matrix of AP adapters, usage and control domains that will be made accessible to the guest. The sysfs location of the matrix device is: /sys/bus/ap_matrix ... [devices] ...... [matrix] Signed-off-by: Tony Krowiak --- drivers/s390/crypto/ap_matrix_bus.c | 54 +++++++++++++++++++++++++++++++++++ drivers/s390/crypto/ap_matrix_bus.h | 6 ++++ 2 files changed, 60 insertions(+), 0 deletions(-) diff --git a/drivers/s390/crypto/ap_matrix_bus.c b/drivers/s390/crypto/ap_matrix_bus.c index fbae175..4eb1e3c 100644 --- a/drivers/s390/crypto/ap_matrix_bus.c +++ b/drivers/s390/crypto/ap_matrix_bus.c @@ -12,6 +12,7 @@ #include #include +#include #include #include "ap_matrix_bus.h" @@ -21,13 +22,59 @@ MODULE_LICENSE("GPL v2"); #define AP_MATRIX_BUS_NAME "ap_matrix" +#define AP_MATRIX_DEV_TYPE_NAME "ap_matrix" +#define AP_MATRIX_DEV_NAME "matrix" static struct device *ap_matrix_root_device; +static struct ap_matrix *matrix; static struct bus_type ap_matrix_bus_type = { .name = AP_MATRIX_BUS_NAME, }; +static struct device_type ap_matrix_type = { + .name = AP_MATRIX_DEV_TYPE_NAME, +}; + +static void ap_matrix_dev_release(struct device *dev) +{ + struct ap_matrix *ap_matrix; + + ap_matrix = container_of(dev, struct ap_matrix, device); + + if (matrix == ap_matrix) + kfree(matrix); + + matrix = NULL; +} + +static int ap_matrix_dev_create(void) +{ + int ret; + + matrix = kzalloc(sizeof(*matrix), GFP_KERNEL); + if (!matrix) + return -ENOMEM; + + matrix->device.type = &ap_matrix_type; + dev_set_name(&matrix->device, "%s", AP_MATRIX_DEV_NAME); + matrix->device.bus = &ap_matrix_bus_type; + matrix->device.parent = ap_matrix_root_device; + matrix->device.release = ap_matrix_dev_release; + + ret = device_register(&matrix->device); + if (ret) { + put_device(&matrix->device); + kfree(matrix); + matrix = NULL; + return ret; + } + + get_device(&matrix->device); + + return 0; +} + int __init ap_matrix_init(void) { int ret; @@ -41,8 +88,15 @@ int __init ap_matrix_init(void) if (ret) goto bus_reg_err; + ret = ap_matrix_dev_create(); + if (ret) + goto matrix_create_err; + return 0; +matrix_create_err: + bus_unregister(&ap_matrix_bus_type); + bus_reg_err: root_device_unregister(ap_matrix_root_device); diff --git a/drivers/s390/crypto/ap_matrix_bus.h b/drivers/s390/crypto/ap_matrix_bus.h index 58e116f..225db4f 100644 --- a/drivers/s390/crypto/ap_matrix_bus.h +++ b/drivers/s390/crypto/ap_matrix_bus.h @@ -10,6 +10,12 @@ #ifndef _AP_MATRIX_BUS_H_ #define _AP_MATRIX_BUS_H_ +#include + +struct ap_matrix { + struct device device; +}; + int ap_matrix_init(void); #endif /* _AP_MATRIX_BUS_H_ */ -- 1.7.1