From patchwork Tue Oct 31 09:55:19 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Janosch Frank X-Patchwork-Id: 13441364 Received: from lindbergh.monkeyblade.net (lindbergh.monkeyblade.net [23.128.96.19]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 360BE182A4 for ; Tue, 31 Oct 2023 09:56:02 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=ibm.com header.i=@ibm.com header.b="LJRKfKLC" Received: from mx0a-001b2d01.pphosted.com (mx0a-001b2d01.pphosted.com [148.163.156.1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 2B4AEA1 for ; Tue, 31 Oct 2023 02:56:00 -0700 (PDT) Received: from pps.filterd (m0353728.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.17.1.19/8.17.1.19) with ESMTP id 39V9CG46028882 for ; Tue, 31 Oct 2023 09:56:00 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ibm.com; h=from : to : cc : subject : date : message-id : in-reply-to : references : mime-version : content-transfer-encoding; s=pp1; bh=myFg3yo+t0DUUZk8mS/Pg4bRSKeU1UZP7gkYQrCKHW8=; b=LJRKfKLCLFVwMaMJ2SbZaVSJ2hEHEImuaSJFN//1VyaZ74qTtyFcSnqyP4U6ortq2YZ7 H6hkdHKJuo1uMdL3VQXRQVeYXfKA8aIAkhaditAlsQp1Y+d/ZwO6qCO9wLwuELSv9dJU PxwnKdj2yoksU80SEA4QcyevT5RGVXMLEoxWbh1ZOf5tgqaG8ybF+nLIqbjRR+Ct7CcO zv5neBdgEJWQ7YgxHakHCav9qlV93D50RRLlhOUceSeLAhtLBhZiQNdZS0HHcPXWISln uPuKTzyUSGcvHpOpzQftvzBW3MHs0MzCF61hbts6E1SPPgSNXzGnwukhtx3M8tME2Mhq dg== Received: from pps.reinject (localhost [127.0.0.1]) by mx0a-001b2d01.pphosted.com (PPS) with ESMTPS id 3u2xrahebg-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT) for ; Tue, 31 Oct 2023 09:55:59 +0000 Received: from m0353728.ppops.net (m0353728.ppops.net [127.0.0.1]) by pps.reinject (8.17.1.5/8.17.1.5) with ESMTP id 39V9iYkh027656 for ; Tue, 31 Oct 2023 09:55:59 GMT Received: from ppma11.dal12v.mail.ibm.com (db.9e.1632.ip4.static.sl-reverse.com [50.22.158.219]) by mx0a-001b2d01.pphosted.com (PPS) with ESMTPS id 3u2xrahear-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Tue, 31 Oct 2023 09:55:58 +0000 Received: from pps.filterd (ppma11.dal12v.mail.ibm.com [127.0.0.1]) by ppma11.dal12v.mail.ibm.com (8.17.1.19/8.17.1.19) with ESMTP id 39V72jmB031388; Tue, 31 Oct 2023 09:55:58 GMT Received: from smtprelay01.fra02v.mail.ibm.com ([9.218.2.227]) by ppma11.dal12v.mail.ibm.com (PPS) with ESMTPS id 3u1fb1xwgb-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Tue, 31 Oct 2023 09:55:58 +0000 Received: from smtpav04.fra02v.mail.ibm.com (smtpav04.fra02v.mail.ibm.com [10.20.54.103]) by smtprelay01.fra02v.mail.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id 39V9tsG79306806 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Tue, 31 Oct 2023 09:55:54 GMT Received: from smtpav04.fra02v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 5F86B20040; Tue, 31 Oct 2023 09:55:54 +0000 (GMT) Received: from smtpav04.fra02v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 342842004D; Tue, 31 Oct 2023 09:55:54 +0000 (GMT) Received: from a46lp67.. (unknown [9.152.108.100]) by smtpav04.fra02v.mail.ibm.com (Postfix) with ESMTP; Tue, 31 Oct 2023 09:55:54 +0000 (GMT) From: Janosch Frank To: kvm@vger.kernel.org Cc: nrb@linux.ibm.com, imbrenda@linux.ibm.com, thuth@redhat.com, david@redhat.com Subject: [kvm-unit-tests PATCH v2 3/3] lib: s390x: sclp: Add line mode input handling Date: Tue, 31 Oct 2023 09:55:19 +0000 Message-Id: <20231031095519.73311-4-frankja@linux.ibm.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20231031095519.73311-1-frankja@linux.ibm.com> References: <20231031095519.73311-1-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: TqaW4PVJBUdbjq3_S64q-PJIbuT2LV-d X-Proofpoint-ORIG-GUID: 3csOuQFnsc7ghmlp2p73h53G5B2rBh2d 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=2023-10-30_13,2023-10-31_03,2023-05-22_02 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 impostorscore=0 mlxlogscore=999 suspectscore=0 phishscore=0 bulkscore=0 mlxscore=0 lowpriorityscore=0 malwarescore=0 clxscore=1015 adultscore=0 priorityscore=1501 spamscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2310240000 definitions=main-2310310077 Time to add line-mode input so we can use input handling under LPAR if there's no access to a ASCII console. Line-mode IO is pretty wild and the documentation could be improved a lot. Hence I've copied the input parsing functions from Linux. For some reason output is a type 2 event but input is a type 1 event. This also means that the input and output structures are different from each other. The input can consist of multiple structures which don't contain text data before the input text data is reached. Hence we need a bunch of search functions to retrieve a pointer to the text data. Signed-off-by: Janosch Frank --- lib/s390x/sclp-console.c | 181 ++++++++++++++++++++++++++++++++++----- lib/s390x/sclp.h | 26 +++++- 2 files changed, 186 insertions(+), 21 deletions(-) diff --git a/lib/s390x/sclp-console.c b/lib/s390x/sclp-console.c index 6c965b6d..5de33257 100644 --- a/lib/s390x/sclp-console.c +++ b/lib/s390x/sclp-console.c @@ -1,8 +1,13 @@ /* SPDX-License-Identifier: GPL-2.0-or-later */ /* - * SCLP ASCII access driver + * SCLP line mode and ASCII console driver + * Some parts taken from the Linux kernel. * * Copyright (c) 2013 Alexander Graf + * + * Copyright IBM Corp. 1999 + * Author(s): Martin Peschke + * Martin Schwidefsky */ #include @@ -86,6 +91,41 @@ static uint8_t _ascebc[256] = { 0x90, 0x3F, 0x3F, 0x3F, 0x3F, 0xEA, 0x3F, 0xFF }; +static const uint8_t _ebcasc[] = { + 0x00, 0x01, 0x02, 0x03, 0x07, 0x09, 0x07, 0x7F, + 0x07, 0x07, 0x07, 0x0B, 0x0C, 0x0D, 0x0E, 0x0F, + 0x10, 0x11, 0x12, 0x13, 0x07, 0x0A, 0x08, 0x07, + 0x18, 0x19, 0x07, 0x07, 0x07, 0x07, 0x07, 0x07, + 0x07, 0x07, 0x1C, 0x07, 0x07, 0x0A, 0x17, 0x1B, + 0x07, 0x07, 0x07, 0x07, 0x07, 0x05, 0x06, 0x07, + 0x07, 0x07, 0x16, 0x07, 0x07, 0x07, 0x07, 0x04, + 0x07, 0x07, 0x07, 0x07, 0x14, 0x15, 0x07, 0x1A, + 0x20, 0xFF, 0x83, 0x84, 0x85, 0xA0, 0x07, 0x86, + 0x87, 0xA4, 0x5B, 0x2E, 0x3C, 0x28, 0x2B, 0x21, + 0x26, 0x82, 0x88, 0x89, 0x8A, 0xA1, 0x8C, 0x07, + 0x8D, 0xE1, 0x5D, 0x24, 0x2A, 0x29, 0x3B, 0x5E, + 0x2D, 0x2F, 0x07, 0x8E, 0x07, 0x07, 0x07, 0x8F, + 0x80, 0xA5, 0x07, 0x2C, 0x25, 0x5F, 0x3E, 0x3F, + 0x07, 0x90, 0x07, 0x07, 0x07, 0x07, 0x07, 0x07, + 0x70, 0x60, 0x3A, 0x23, 0x40, 0x27, 0x3D, 0x22, + 0x07, 0x61, 0x62, 0x63, 0x64, 0x65, 0x66, 0x67, + 0x68, 0x69, 0xAE, 0xAF, 0x07, 0x07, 0x07, 0xF1, + 0xF8, 0x6A, 0x6B, 0x6C, 0x6D, 0x6E, 0x6F, 0x70, + 0x71, 0x72, 0xA6, 0xA7, 0x91, 0x07, 0x92, 0x07, + 0xE6, 0x7E, 0x73, 0x74, 0x75, 0x76, 0x77, 0x78, + 0x79, 0x7A, 0xAD, 0xAB, 0x07, 0x07, 0x07, 0x07, + 0x9B, 0x9C, 0x9D, 0xFA, 0x07, 0x07, 0x07, 0xAC, + 0xAB, 0x07, 0xAA, 0x7C, 0x07, 0x07, 0x07, 0x07, + 0x7B, 0x41, 0x42, 0x43, 0x44, 0x45, 0x46, 0x47, + 0x48, 0x49, 0x07, 0x93, 0x94, 0x95, 0xA2, 0x07, + 0x7D, 0x4A, 0x4B, 0x4C, 0x4D, 0x4E, 0x4F, 0x50, + 0x51, 0x52, 0x07, 0x96, 0x81, 0x97, 0xA3, 0x98, + 0x5C, 0xF6, 0x53, 0x54, 0x55, 0x56, 0x57, 0x58, + 0x59, 0x5A, 0xFD, 0x07, 0x99, 0x07, 0x07, 0x07, + 0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37, + 0x38, 0x39, 0x07, 0x07, 0x9A, 0x07, 0x07, 0x07, +}; + static bool lpar_ascii_compat; static char lm_buff[120]; @@ -226,7 +266,8 @@ static void sclp_write_event_mask(int receive_mask, int send_mask) static void sclp_console_enable_read(void) { - sclp_write_event_mask(SCLP_EVENT_MASK_MSG_ASCII, SCLP_EVENT_MASK_MSG_ASCII | SCLP_EVENT_MASK_MSG); + sclp_write_event_mask(SCLP_EVENT_MASK_MSG_ASCII | SCLP_EVENT_MASK_OPCMD, + SCLP_EVENT_MASK_MSG_ASCII | SCLP_EVENT_MASK_MSG); } static void sclp_console_disable_read(void) @@ -264,37 +305,137 @@ void sclp_print(const char *str) sclp_print_lm(str); } +static char *console_read_ascii(struct EventBufferHeader *ebh, int *len) +{ + struct ReadEventDataAsciiConsole *evdata = (void *)ebh; + const int max_event_buffer_len = SCCB_SIZE - offsetof(ReadEventDataAsciiConsole, ebh); + const int event_buffer_ascii_recv_header_len = offsetof(ReadEventDataAsciiConsole, data); + + assert(ebh->length <= max_event_buffer_len); + assert(ebh->length > event_buffer_ascii_recv_header_len); + + *len = ebh->length - event_buffer_ascii_recv_header_len; + return evdata->data; +} + + +static struct gds_vector *sclp_find_gds_vector(void *start, void *end, uint16_t id) +{ + struct gds_vector *v; + + for (v = start; (void *)v < end; v = (void *)v + v->length) + if (v->gds_id == id) + return v; + return NULL; +} + +static struct gds_subvector *sclp_eval_selfdeftextmsg(struct gds_subvector *sv) +{ + void *end; + + end = (void *)sv + sv->length; + for (sv = sv + 1; (void *)sv < end; sv = (void *)sv + sv->length) + if (sv->key == 0x30) + return sv; + return NULL; +} + +static struct gds_subvector *sclp_eval_textcmd(struct gds_vector *v) +{ + struct gds_subvector *sv; + void *end; + + end = (void *)v + v->length; + for (sv = (struct gds_subvector *)(v + 1); (void *)sv < end; + sv = (void *)sv + sv->length) + if (sv->key == GDS_KEY_SELFDEFTEXTMSG) + return sclp_eval_selfdeftextmsg(sv); + return NULL; +} + +static struct gds_subvector *sclp_eval_cpmsu(struct gds_vector *v) +{ + void *end; + + end = (void *)v + v->length; + for (v = v + 1; (void *)v < end; v = (void *)v + v->length) + if (v->gds_id == GDS_ID_TEXTCMD) + return sclp_eval_textcmd(v); + return NULL; +} + +static struct gds_subvector *sclp_eval_mdsmu(struct gds_vector *v) +{ + v = sclp_find_gds_vector(v + 1, (void *)v + v->length, GDS_ID_CPMSU); + if (v) + return sclp_eval_cpmsu(v); + return NULL; +} + +static char *console_read_lm(struct EventBufferHeader *ebh, int *len) +{ + struct gds_vector *v = (void *)ebh + sizeof(*ebh); + struct gds_subvector *sv; + + v = sclp_find_gds_vector(v, (void *)ebh + ebh->length, + GDS_ID_MDSMU); + if (!v) + return NULL; + + sv = sclp_eval_mdsmu(v); + if (!sv) + return NULL; + + *len = sv->length - (sizeof(*sv)); + return (char *)(sv + 1); +} + +static void ebc_to_asc(char *data, int len) +{ + int i; + + for (i = 0; i < len; i++) + data[i] = _ebcasc[(uint8_t)data[i]]; +} + static int console_refill_read_buffer(void) { - const int max_event_buffer_len = SCCB_SIZE - offsetof(ReadEventDataAsciiConsole, ebh); - ReadEventDataAsciiConsole *sccb = (void *)_sccb; - const int event_buffer_ascii_recv_header_len = sizeof(sccb->ebh) + sizeof(sccb->type); - int ret = -1; + struct SCCBHeader *sccb = (struct SCCBHeader *)_sccb; + struct EventBufferHeader *ebh = (void *)_sccb + sizeof(struct SCCBHeader); + char *data; + int ret = -1, len; sclp_console_enable_read(); sclp_mark_busy(); - memset(sccb, 0, SCCB_SIZE); - sccb->h.length = PAGE_SIZE; - sccb->h.function_code = SCLP_UNCONDITIONAL_READ; - sccb->h.control_mask[2] = SCLP_CM2_VARIABLE_LENGTH_RESPONSE; + memset(_sccb, 0, SCCB_SIZE); + sccb->length = PAGE_SIZE; + sccb->function_code = SCLP_UNCONDITIONAL_READ; + sccb->control_mask[2] = SCLP_CM2_VARIABLE_LENGTH_RESPONSE; sclp_service_call(SCLP_CMD_READ_EVENT_DATA, sccb); - if (sccb->h.response_code == SCLP_RC_NO_EVENT_BUFFERS_STORED || - sccb->ebh.type != SCLP_EVENT_ASCII_CONSOLE_DATA || - sccb->type != SCLP_EVENT_ASCII_TYPE_DATA_STREAM_FOLLOWS) { - ret = -1; + if (sccb->response_code == SCLP_RC_NO_EVENT_BUFFERS_STORED) + goto out; + + switch (ebh->type) { + case SCLP_EVENT_OP_CMD: + data = console_read_lm(ebh, &len); + if (data) + ebc_to_asc(data, len); + break; + case SCLP_EVENT_ASCII_CONSOLE_DATA: + data = console_read_ascii(ebh, &len); + break; + default: goto out; } - assert(sccb->ebh.length <= max_event_buffer_len); - assert(sccb->ebh.length > event_buffer_ascii_recv_header_len); + if (!data) + goto out; - read_buf_length = sccb->ebh.length - event_buffer_ascii_recv_header_len; - - assert(read_buf_length <= sizeof(read_buf)); - memcpy(read_buf, sccb->data, read_buf_length); + assert(len <= sizeof(read_buf)); + memcpy(read_buf, data, len); read_index = 0; ret = 0; diff --git a/lib/s390x/sclp.h b/lib/s390x/sclp.h index 6a611bc3..22f120d1 100644 --- a/lib/s390x/sclp.h +++ b/lib/s390x/sclp.h @@ -226,6 +226,7 @@ typedef struct SCCB { } __attribute__((packed)) SCCB; /* SCLP event types */ +#define SCLP_EVENT_OP_CMD 0x01 #define SCLP_EVENT_ASCII_CONSOLE_DATA 0x1a #define SCLP_EVENT_SIGNAL_QUIESCE 0x1d @@ -233,6 +234,7 @@ typedef struct SCCB { #define SCLP_EVENT_MASK_SIGNAL_QUIESCE 0x00000008 #define SCLP_EVENT_MASK_MSG_ASCII 0x00000040 #define SCLP_EVENT_MASK_MSG 0x40000000 +#define SCLP_EVENT_MASK_OPCMD 0x80000000 #define SCLP_UNCONDITIONAL_READ 0x00 #define SCLP_SELECTIVE_READ 0x01 @@ -296,6 +298,23 @@ struct mdb { struct mto mto; } __attribute__((packed)); +/* vector keys and ids */ +#define GDS_ID_MDSMU 0x1310 +#define GDS_ID_CPMSU 0x1212 +#define GDS_ID_TEXTCMD 0x1320 +#define GDS_KEY_SELFDEFTEXTMSG 0x31 +#define EBC_MDB 0xd4c4c240 + +struct gds_vector { + uint16_t length; + uint16_t gds_id; +} __attribute__((packed)); + +struct gds_subvector { + uint8_t length; + uint8_t key; +} __attribute__((packed)); + typedef struct EventBufferHeader { uint16_t length; uint8_t type; @@ -320,12 +339,17 @@ typedef struct ReadEventData { #define SCLP_EVENT_ASCII_TYPE_DATA_STREAM_FOLLOWS 0 typedef struct ReadEventDataAsciiConsole { - SCCBHeader h; EventBufferHeader ebh; uint8_t type; char data[]; } __attribute__((packed)) ReadEventDataAsciiConsole; +struct ReadEventDataLMConsole { + SCCBHeader h; + EventBufferHeader ebh; + struct gds_vector v[]; +}; + extern char _sccb[]; void sclp_setup_int(void); void sclp_handle_ext(void);