From patchwork Fri Nov 10 13:52:14 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Nico Boehr X-Patchwork-Id: 13452420 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 E75381A732 for ; Fri, 10 Nov 2023 13:54:31 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=ibm.com header.i=@ibm.com header.b="QtX4FM0A" Received: from mx0b-001b2d01.pphosted.com (mx0b-001b2d01.pphosted.com [148.163.158.5]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 541763821D for ; Fri, 10 Nov 2023 05:54:30 -0800 (PST) Received: from pps.filterd (m0353723.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.17.1.19/8.17.1.19) with ESMTP id 3AADeF9O027646; Fri, 10 Nov 2023 13:54:19 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 : content-transfer-encoding : mime-version; s=pp1; bh=ce6gVYV7PiiJzLq2PbHOazjELW14a6f83kuohnnrIcg=; b=QtX4FM0AMD4LSUNtkMrnfc9z7vqgpR5R3VDCMIxtcuAmaRYRtB5athVPP1rQ8+m9lUVw 6doH0CW/YLJsBX/HGrbH4taHOhEHYXGRABZaHhk6wp0PfLEpLtaebiLy+dV//q5MncQ4 1pbMxWHakn61mDChbGJbtZFc+NfmB27VkMev5ctSRMT9ZoUIOc/JChHm1NaxTAdJUFLo jZJQ2kG2TTaZJ5hqaAHhBonZua2GWHtTfApD1HY+UtmlbrKodzWHpLFoQtNDPo51rdXg EDIORur9B6SXXBx1aGfepPP2Vm6NL1iWl1O040sS0Jzk6z5Mf9ZU5LRLU48hCAc+ph8R xw== Received: from pps.reinject (localhost [127.0.0.1]) by mx0a-001b2d01.pphosted.com (PPS) with ESMTPS id 3u9nkq0gdf-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Fri, 10 Nov 2023 13:54:18 +0000 Received: from m0353723.ppops.net (m0353723.ppops.net [127.0.0.1]) by pps.reinject (8.17.1.5/8.17.1.5) with ESMTP id 3AADfrd3032745; Fri, 10 Nov 2023 13:54:17 GMT Received: from ppma21.wdc07v.mail.ibm.com (5b.69.3da9.ip4.static.sl-reverse.com [169.61.105.91]) by mx0a-001b2d01.pphosted.com (PPS) with ESMTPS id 3u9nkq0gd6-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Fri, 10 Nov 2023 13:54:17 +0000 Received: from pps.filterd (ppma21.wdc07v.mail.ibm.com [127.0.0.1]) by ppma21.wdc07v.mail.ibm.com (8.17.1.19/8.17.1.19) with ESMTP id 3AABJBIs000675; Fri, 10 Nov 2023 13:54:17 GMT Received: from smtprelay07.fra02v.mail.ibm.com ([9.218.2.229]) by ppma21.wdc07v.mail.ibm.com (PPS) with ESMTPS id 3u7w23b7d4-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Fri, 10 Nov 2023 13:54:16 +0000 Received: from smtpav02.fra02v.mail.ibm.com (smtpav02.fra02v.mail.ibm.com [10.20.54.101]) by smtprelay07.fra02v.mail.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id 3AADsDDh13107742 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Fri, 10 Nov 2023 13:54:14 GMT Received: from smtpav02.fra02v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id D3D632004F; Fri, 10 Nov 2023 13:54:13 +0000 (GMT) Received: from smtpav02.fra02v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 8FD3F20043; Fri, 10 Nov 2023 13:54:11 +0000 (GMT) Received: from t14-nrb.ibmuc.com (unknown [9.179.18.113]) by smtpav02.fra02v.mail.ibm.com (Postfix) with ESMTP; Fri, 10 Nov 2023 13:54:11 +0000 (GMT) From: Nico Boehr To: thuth@redhat.com, pbonzini@redhat.com, andrew.jones@linux.dev Cc: kvm@vger.kernel.org, frankja@linux.ibm.com, imbrenda@linux.ibm.com Subject: [kvm-unit-tests GIT PULL 05/26] lib: s390x: sclp: Add line mode input handling Date: Fri, 10 Nov 2023 14:52:14 +0100 Message-ID: <20231110135348.245156-6-nrb@linux.ibm.com> X-Mailer: git-send-email 2.41.0 In-Reply-To: <20231110135348.245156-1-nrb@linux.ibm.com> References: <20231110135348.245156-1-nrb@linux.ibm.com> X-TM-AS-GCONF: 00 X-Proofpoint-GUID: 7FUtMUGMBRmqGkVe2eXqI1ssmZBwCm73 X-Proofpoint-ORIG-GUID: nqg7216hX-k1yv3gnzSwyMS8-TS4SLKi X-Proofpoint-UnRewURL: 0 URL was un-rewritten Precedence: bulk X-Mailing-List: kvm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 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=2023-11-10_10,2023-11-09_01,2023-05-22_02 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 spamscore=0 impostorscore=0 mlxscore=0 lowpriorityscore=0 priorityscore=1501 bulkscore=0 mlxlogscore=999 adultscore=0 suspectscore=0 phishscore=0 malwarescore=0 clxscore=1015 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2311060000 definitions=main-2311100114 From: Janosch Frank 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 Link: https://lore.kernel.org/r/20231031095519.73311-4-frankja@linux.ibm.com Signed-off-by: Nico Boehr --- lib/s390x/sclp.h | 26 +++++- lib/s390x/sclp-console.c | 181 ++++++++++++++++++++++++++++++++++----- 2 files changed, 186 insertions(+), 21 deletions(-) diff --git a/lib/s390x/sclp.h b/lib/s390x/sclp.h index 6a611bc..22f120d 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); diff --git a/lib/s390x/sclp-console.c b/lib/s390x/sclp-console.c index 6c965b6..5de3325 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 int console_refill_read_buffer(void) +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); - ReadEventDataAsciiConsole *sccb = (void *)_sccb; - const int event_buffer_ascii_recv_header_len = sizeof(sccb->ebh) + sizeof(sccb->type); - int ret = -1; + 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) +{ + 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; - } - assert(sccb->ebh.length <= max_event_buffer_len); - assert(sccb->ebh.length > event_buffer_ascii_recv_header_len); + 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; + } - read_buf_length = sccb->ebh.length - event_buffer_ascii_recv_header_len; + if (!data) + goto out; - 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;