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(unknown [9.152.108.100]) by smtpav03.fra02v.mail.ibm.com (Postfix) with ESMTP; Fri, 17 Nov 2023 15:19:54 +0000 (GMT) From: Janosch Frank To: kvm@vger.kernel.org Cc: linux-s390@vger.kernel.org, imbrenda@linux.ibm.com, thuth@redhat.com, david@redhat.com, nsg@linux.ibm.com, nrb@linux.ibm.com Subject: [kvm-unit-tests PATCH v3 1/7] lib: s390x: Add ap library Date: Fri, 17 Nov 2023 15:19:33 +0000 Message-Id: <20231117151939.971079-2-frankja@linux.ibm.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20231117151939.971079-1-frankja@linux.ibm.com> References: <20231117151939.971079-1-frankja@linux.ibm.com> Precedence: bulk X-Mailing-List: kvm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-TM-AS-GCONF: 00 X-Proofpoint-GUID: xpRzy0KE5ZQOO-o-ztdt-dr1ToofaDXo X-Proofpoint-ORIG-GUID: B1ZRAI6tDsYCWLbKxzUcQKK2aeWsrq37 X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.272,Aquarius:18.0.987,Hydra:6.0.619,FMLib:17.11.176.26 definitions=2023-11-17_14,2023-11-17_01,2023-05-22_02 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 suspectscore=0 spamscore=0 lowpriorityscore=0 bulkscore=0 impostorscore=0 priorityscore=1501 adultscore=0 mlxscore=0 mlxlogscore=999 malwarescore=0 clxscore=1015 phishscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2311060000 definitions=main-2311170114 Add functions and definitions needed to test the Adjunct Processor (AP) crypto interface. Signed-off-by: Janosch Frank --- lib/s390x/ap.c | 93 ++++++++++++++++++++++++++++++++++++++++++++++++++ lib/s390x/ap.h | 88 +++++++++++++++++++++++++++++++++++++++++++++++ s390x/Makefile | 1 + 3 files changed, 182 insertions(+) create mode 100644 lib/s390x/ap.c create mode 100644 lib/s390x/ap.h diff --git a/lib/s390x/ap.c b/lib/s390x/ap.c new file mode 100644 index 00000000..17a32d66 --- /dev/null +++ b/lib/s390x/ap.c @@ -0,0 +1,93 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ +/* + * AP crypto functions + * + * Some parts taken from the Linux AP driver. + * + * Copyright IBM Corp. 2023 + * Author: Janosch Frank + * Tony Krowiak + * Martin Schwidefsky + * Harald Freudenberger + */ + +#include +#include +#include +#include +#include + +int ap_pqap_tapq(uint8_t ap, uint8_t qn, struct ap_queue_status *apqsw, + struct pqap_r2 *r2) +{ + struct pqap_r0 r0 = { + .ap = ap, + .qn = qn, + .fc = PQAP_TEST_APQ + }; + int cc; + + /* + * Test AP Queue + * + * Writes AP configuration information to the memory pointed + * at by GR2. + * + * Inputs: GR0 + * Outputs: GR1 (APQSW), GR2 (tapq data) + * Synchronous + */ + asm volatile( + " lgr 0,%[r0]\n" + " .insn rre,0xb2af0000,0,0\n" /* PQAP */ + " stg 1,%[apqsw]\n" + " stg 2,%[r2]\n" + " ipm %[cc]\n" + " srl %[cc],28\n" + : [apqsw] "=&T" (*apqsw), [r2] "=&T" (*r2), [cc] "=&d" (cc) + : [r0] "d" (r0)); + + return cc; +} + +int ap_pqap_qci(struct ap_config_info *info) +{ + struct pqap_r0 r0 = { .fc = PQAP_QUERY_AP_CONF_INFO }; + int cc; + + /* + * Query AP Configuration Information + * + * Writes AP configuration information to the memory pointed + * at by GR2. + * + * Inputs: GR0, GR2 (QCI block address) + * Outputs: memory at GR2 address + * Synchronous + */ + asm volatile( + " lgr 0,%[r0]\n" + " lgr 2,%[info]\n" + " .insn rre,0xb2af0000,0,0\n" /* PQAP */ + " ipm %[cc]\n" + " srl %[cc],28\n" + : [cc] "=&d" (cc) + : [r0] "d" (r0), [info] "d" (info) + : "cc", "memory", "0", "2"); + + return cc; +} + +/* Will later be extended to a proper setup function */ +bool ap_setup(void) +{ + /* + * Base AP support has no STFLE or SCLP feature bit but the + * PQAP QCI support is indicated via stfle bit 12. As this + * library relies on QCI we bail out if it's not available. + */ + if (!test_facility(12)) + return false; + + return true; +} diff --git a/lib/s390x/ap.h b/lib/s390x/ap.h new file mode 100644 index 00000000..cda1e564 --- /dev/null +++ b/lib/s390x/ap.h @@ -0,0 +1,88 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ +/* + * AP definitions + * + * Some parts taken from the Linux AP driver. + * + * Copyright IBM Corp. 2023 + * Author: Janosch Frank + * Tony Krowiak + * Martin Schwidefsky + * Harald Freudenberger + */ + +#ifndef _S390X_AP_H_ +#define _S390X_AP_H_ + +enum PQAP_FC { + PQAP_TEST_APQ, + PQAP_RESET_APQ, + PQAP_ZEROIZE_APQ, + PQAP_QUEUE_INT_CONTRL, + PQAP_QUERY_AP_CONF_INFO, + PQAP_QUERY_AP_COMP_TYPE, + PQAP_BEST_AP, +}; + +struct ap_queue_status { + uint32_t pad0; /* Ignored padding for zArch */ + uint32_t empty : 1; + uint32_t replies_waiting: 1; + uint32_t full : 1; + uint32_t pad1 : 4; + uint32_t irq_enabled : 1; + uint32_t rc : 8; + uint32_t pad2 : 16; +} __attribute__((packed)) __attribute__((aligned(8))); +_Static_assert(sizeof(struct ap_queue_status) == sizeof(uint64_t), "APQSW size"); + +struct ap_config_info { + uint8_t apsc : 1; /* S bit */ + uint8_t apxa : 1; /* N bit */ + uint8_t qact : 1; /* C bit */ + uint8_t rc8a : 1; /* R bit */ + uint8_t l : 1; /* L bit */ + uint8_t lext : 3; /* Lext bits */ + uint8_t reserved2[3]; + uint8_t Na; /* max # of APs - 1 */ + uint8_t Nd; /* max # of Domains - 1 */ + uint8_t reserved6[10]; + uint32_t apm[8]; /* AP ID mask */ + uint32_t aqm[8]; /* AP (usage) queue mask */ + uint32_t adm[8]; /* AP (control) domain mask */ + uint8_t _reserved4[16]; +} __attribute__((aligned(8))) __attribute__ ((__packed__)); +_Static_assert(sizeof(struct ap_config_info) == 128, "PQAP QCI size"); + +struct pqap_r0 { + uint32_t pad0; + uint8_t fc; + uint8_t t : 1; /* Test facilities (TAPQ)*/ + uint8_t pad1 : 7; + uint8_t ap; + uint8_t qn; +} __attribute__((packed)) __attribute__((aligned(8))); + +struct pqap_r2 { + uint8_t s : 1; /* Special Command facility */ + uint8_t m : 1; /* AP4KM */ + uint8_t c : 1; /* AP4KC */ + uint8_t cop : 1; /* AP is in coprocessor mode */ + uint8_t acc : 1; /* AP is in accelerator mode */ + uint8_t xcp : 1; /* AP is in XCP-mode */ + uint8_t n : 1; /* AP extended addressing facility */ + uint8_t pad_0 : 1; + uint8_t pad_1[3]; + uint8_t at; + uint8_t nd; + uint8_t pad_6; + uint8_t pad_7 : 4; + uint8_t qd : 4; +} __attribute__((packed)) __attribute__((aligned(8))); +_Static_assert(sizeof(struct pqap_r2) == sizeof(uint64_t), "pqap_r2 size"); + +bool ap_setup(void); +int ap_pqap_tapq(uint8_t ap, uint8_t qn, struct ap_queue_status *apqsw, + struct pqap_r2 *r2); +int ap_pqap_qci(struct ap_config_info *info); +#endif diff --git a/s390x/Makefile b/s390x/Makefile index f79fd009..2199eeba 100644 --- a/s390x/Makefile +++ b/s390x/Makefile @@ -110,6 +110,7 @@ cflatobjs += lib/s390x/malloc_io.o cflatobjs += lib/s390x/uv.o cflatobjs += lib/s390x/sie.o cflatobjs += lib/s390x/fault.o +cflatobjs += lib/s390x/ap.o OBJDIRS += lib/s390x