From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mx0b-001b2d01.pphosted.com ([148.163.158.5]:21094 "EHLO mx0a-001b2d01.pphosted.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1726872AbgDXKqC (ORCPT ); Fri, 24 Apr 2020 06:46:02 -0400 From: Pierre Morel Subject: [kvm-unit-tests PATCH v6 06/10] s390x: css: stsch, enumeration test Date: Fri, 24 Apr 2020 12:45:48 +0200 Message-Id: <1587725152-25569-7-git-send-email-pmorel@linux.ibm.com> In-Reply-To: <1587725152-25569-1-git-send-email-pmorel@linux.ibm.com> References: <1587725152-25569-1-git-send-email-pmorel@linux.ibm.com> Sender: linux-s390-owner@vger.kernel.org List-ID: To: kvm@vger.kernel.org Cc: linux-s390@vger.kernel.org, frankja@linux.ibm.com, david@redhat.com, thuth@redhat.com, cohuck@redhat.com First step for testing the channel subsystem is to enumerate the css and retrieve the css devices. This tests the success of STSCH I/O instruction, we do not test the reaction of the VM for an instruction with wrong parameters. Signed-off-by: Pierre Morel --- lib/s390x/css.h | 1 + s390x/Makefile | 2 + s390x/css.c | 92 +++++++++++++++++++++++++++++++++++++++++++++ s390x/unittests.cfg | 4 ++ 4 files changed, 99 insertions(+) create mode 100644 s390x/css.c diff --git a/lib/s390x/css.h b/lib/s390x/css.h index bab0dd5..9417541 100644 --- a/lib/s390x/css.h +++ b/lib/s390x/css.h @@ -82,6 +82,7 @@ struct pmcw { uint8_t chpid[8]; uint32_t flags2; }; +#define PMCW_CHANNEL_TYPE(pmcw) (pmcw->flags2 >> 21) struct schib { struct pmcw pmcw; diff --git a/s390x/Makefile b/s390x/Makefile index ddb4b48..baebf18 100644 --- a/s390x/Makefile +++ b/s390x/Makefile @@ -17,6 +17,7 @@ tests += $(TEST_DIR)/stsi.elf tests += $(TEST_DIR)/skrf.elf tests += $(TEST_DIR)/smp.elf tests += $(TEST_DIR)/sclp.elf +tests += $(TEST_DIR)/css.elf tests_binary = $(patsubst %.elf,%.bin,$(tests)) all: directories test_cases test_cases_binary @@ -51,6 +52,7 @@ cflatobjs += lib/s390x/sclp-console.o cflatobjs += lib/s390x/interrupt.o cflatobjs += lib/s390x/mmu.o cflatobjs += lib/s390x/smp.o +cflatobjs += lib/s390x/css_dump.o OBJDIRS += lib/s390x diff --git a/s390x/css.c b/s390x/css.c new file mode 100644 index 0000000..cc97e79 --- /dev/null +++ b/s390x/css.c @@ -0,0 +1,92 @@ +/* + * Channel Subsystem tests + * + * Copyright (c) 2020 IBM Corp + * + * Authors: + * Pierre Morel + * + * This code is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License version 2. + */ + +#include +#include +#include +#include +#include +#include + +#include + +#define SID_ONE 0x00010000 + +static struct schib schib; +static int test_device_sid; + +static void test_enumerate(void) +{ + struct pmcw *pmcw = &schib.pmcw; + int cc; + int scn; + int scn_found = 0; + int dev_found = 0; + + for (scn = 0; scn < 0xffff; scn++) { + cc = stsch(scn|SID_ONE, &schib); + switch (cc) { + case 0: /* 0 means SCHIB stored */ + break; + case 3: /* 3 means no more channels */ + goto out; + default: /* 1 or 2 should never happened for STSCH */ + report(0, "Unexpected cc=%d on subchannel number 0x%x", + cc, scn); + return; + } + /* We currently only support type 0, a.k.a. I/O channels */ + if (PMCW_CHANNEL_TYPE(pmcw) != 0) + continue; + /* We ignore I/O channels without valid devices */ + scn_found++; + if (!(pmcw->flags & PMCW_DNV)) + continue; + /* We keep track of the first device as our test device */ + if (!test_device_sid) + test_device_sid = scn|SID_ONE; + dev_found++; + } +out: + if (!dev_found) { + report(0, + "Tested subchannels: %d, I/O subchannels: %d, I/O devices: %d", + scn, scn_found, dev_found); + return; + } + report(1, + "Tested subchannels: %d, I/O subchannels: %d, I/O devices: %d", + scn, scn_found, dev_found); +} + +static struct { + const char *name; + void (*func)(void); +} tests[] = { + { "enumerate (stsch)", test_enumerate }, + { NULL, NULL } +}; + +int main(int argc, char *argv[]) +{ + int i; + + report_prefix_push("Channel Subsystem"); + for (i = 0; tests[i].name; i++) { + report_prefix_push(tests[i].name); + tests[i].func(); + report_prefix_pop(); + } + report_prefix_pop(); + + return report_summary(); +} diff --git a/s390x/unittests.cfg b/s390x/unittests.cfg index 07013b2..a436ec0 100644 --- a/s390x/unittests.cfg +++ b/s390x/unittests.cfg @@ -83,3 +83,7 @@ extra_params = -m 1G [sclp-3g] file = sclp.elf extra_params = -m 3G + +[css] +file = css.elf +extra_params =-device ccw-pong -- 2.25.1