From patchwork Fri Apr 1 12:33:21 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Nico Boehr X-Patchwork-Id: 12798250 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 8BA0FC433F5 for ; Fri, 1 Apr 2022 12:33:38 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1345902AbiDAMf0 (ORCPT ); Fri, 1 Apr 2022 08:35:26 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:57102 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1344958AbiDAMfY (ORCPT ); Fri, 1 Apr 2022 08:35:24 -0400 Received: from mx0b-001b2d01.pphosted.com (mx0b-001b2d01.pphosted.com [148.163.158.5]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 28AB3C6EFB; Fri, 1 Apr 2022 05:33:29 -0700 (PDT) Received: from pps.filterd (m0127361.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.16.1.2/8.16.1.2) with SMTP id 231CKLYO001816; Fri, 1 Apr 2022 12:33:29 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=DSXLRxze5wRX0m7nlBW9W0xSMM3vjDw2PPqN6J4yc6g=; b=mT6i+1LtXHZvbEtVsZcRFonas9valvnyiDXi8EY9CRuc/o0U3tPJOL1VtXVLkPQvE4Io yrbl4wR9A5HiPdeYSSpc2qQKQ/cRzu1e01DMAJvdTAcx4t75OM8YrJ542IbThAgkO8xG 3gWzJOTjXY2r0bRsPoT3j9iEflvrOKuqUCjyTWtjAmcZcmby8UxfvUEFTaOc+KXFqx6f cRDZ7d1Ylt0sufxiJolG4iliNlSxcyPGzuCrFXAqKjiWGoIkRa6Y/xCvtRp9/MNlwqkb IzqBb27YGIh1dlEURnIM363Btq4jmp5t2SJYiE1iWRIKKqsNHHkQy22gT+bNCdYZ3j6E Vg== Received: from pps.reinject (localhost [127.0.0.1]) by mx0a-001b2d01.pphosted.com with ESMTP id 3f61agg7f4-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Fri, 01 Apr 2022 12:33:28 +0000 Received: from m0127361.ppops.net (m0127361.ppops.net [127.0.0.1]) by pps.reinject (8.16.0.43/8.16.0.43) with SMTP id 231COtRo017115; Fri, 1 Apr 2022 12:33:28 GMT Received: from ppma02fra.de.ibm.com (47.49.7a9f.ip4.static.sl-reverse.com [159.122.73.71]) by mx0a-001b2d01.pphosted.com with ESMTP id 3f61agg7ep-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Fri, 01 Apr 2022 12:33:28 +0000 Received: from pps.filterd (ppma02fra.de.ibm.com [127.0.0.1]) by ppma02fra.de.ibm.com (8.16.1.2/8.16.1.2) with SMTP id 231CD624021058; Fri, 1 Apr 2022 12:33:26 GMT Received: from b06cxnps3075.portsmouth.uk.ibm.com (d06relay10.portsmouth.uk.ibm.com [9.149.109.195]) by ppma02fra.de.ibm.com with ESMTP id 3f1tf931bj-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Fri, 01 Apr 2022 12:33:26 +0000 Received: from b06wcsmtp001.portsmouth.uk.ibm.com (b06wcsmtp001.portsmouth.uk.ibm.com [9.149.105.160]) by b06cxnps3075.portsmouth.uk.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id 231CXMnh31064572 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Fri, 1 Apr 2022 12:33:22 GMT Received: from b06wcsmtp001.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 34CBEA407A; Fri, 1 Apr 2022 12:33:22 +0000 (GMT) Received: from b06wcsmtp001.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id EAED6A4067; Fri, 1 Apr 2022 12:33:21 +0000 (GMT) Received: from t46lp57.lnxne.boe (unknown [9.152.108.100]) by b06wcsmtp001.portsmouth.uk.ibm.com (Postfix) with ESMTP; Fri, 1 Apr 2022 12:33:21 +0000 (GMT) From: Nico Boehr To: kvm@vger.kernel.org, linux-s390@vger.kernel.org Cc: frankja@linux.ibm.com, imbrenda@linux.ibm.com, thuth@redhat.com, david@redhat.com, farman@linux.ibm.com Subject: [kvm-unit-tests PATCH 2/2] s390x: add test for SIGP STORE_ADTL_STATUS order Date: Fri, 1 Apr 2022 14:33:21 +0200 Message-Id: <20220401123321.1714489-3-nrb@linux.ibm.com> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20220401123321.1714489-1-nrb@linux.ibm.com> References: <20220401123321.1714489-1-nrb@linux.ibm.com> MIME-Version: 1.0 X-TM-AS-GCONF: 00 X-Proofpoint-ORIG-GUID: rdkhZEaQVzq06iAUs2AP1hQl3zmse4hW X-Proofpoint-GUID: 3twx_3lHIp5oHVtIHaXF4ZDawBa16FdK X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.205,Aquarius:18.0.850,Hydra:6.0.425,FMLib:17.11.64.514 definitions=2022-04-01_04,2022-03-31_01,2022-02-23_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 adultscore=0 mlxscore=0 phishscore=0 priorityscore=1501 clxscore=1015 bulkscore=0 malwarescore=0 mlxlogscore=999 lowpriorityscore=0 suspectscore=0 impostorscore=0 spamscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2202240000 definitions=main-2204010057 Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org Add a test for SIGP STORE_ADDITIONAL_STATUS order. There are several cases to cover: - when neither vector nor guarded-storage facility is available, check the order is rejected. - when one of the facilities is there, test the order is rejected and adtl_status is not touched when the target CPU is running or when an invalid CPU address is specified. Also check the order is rejected in case of invalid alignment. - when the vector facility is there, write some data to the CPU's vector registers and check we get the right contents. - when the guarded-storage facility is there, populate the CPU's guarded-storage registers with some data and again check we get the right contents. To make sure we cover all these cases, adjust unittests.cfg to run the test with both guarded-storage and vector facility off and on. In TCG, we don't have guarded-storage support, so we just run with vector facility off and on. Signed-off-by: Nico Boehr --- lib/s390x/asm/vector.h | 16 ++ s390x/Makefile | 1 + s390x/adtl-status.c | 411 +++++++++++++++++++++++++++++++++++++++++ s390x/unittests.cfg | 25 +++ 4 files changed, 453 insertions(+) create mode 100644 lib/s390x/asm/vector.h create mode 100644 s390x/adtl-status.c diff --git a/lib/s390x/asm/vector.h b/lib/s390x/asm/vector.h new file mode 100644 index 000000000000..ee48bfa65070 --- /dev/null +++ b/lib/s390x/asm/vector.h @@ -0,0 +1,16 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ +/* + * Vector facility related defines and functions + * + * Copyright IBM Corp. 2022 + * + * Authors: + * Nico Boehr + */ +#ifndef _ASMS390X_VECTOR_H_ +#define _ASMS390X_VECTOR_H_ + +#define VEC_REGISTER_NUM 32 +#define VEC_REGISTER_SIZE 16 + +#endif diff --git a/s390x/Makefile b/s390x/Makefile index 53b0fe044fe7..867d261622b6 100644 --- a/s390x/Makefile +++ b/s390x/Makefile @@ -26,6 +26,7 @@ tests += $(TEST_DIR)/edat.elf tests += $(TEST_DIR)/mvpg-sie.elf tests += $(TEST_DIR)/spec_ex-sie.elf tests += $(TEST_DIR)/firq.elf +tests += $(TEST_DIR)/adtl-status.elf pv-tests += $(TEST_DIR)/pv-diags.elf diff --git a/s390x/adtl-status.c b/s390x/adtl-status.c new file mode 100644 index 000000000000..c3ecdbc35a9d --- /dev/null +++ b/s390x/adtl-status.c @@ -0,0 +1,411 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ +/* + * Tests sigp store additional status order + * + * Copyright IBM Corp. 2022 + * + * Authors: + * Nico Boehr + */ +#include +#include +#include +#include +#include +#include +#include + +#include +#include + +static int testflag = 0; + +#define INVALID_CPU_ADDRESS -4711 + +struct mcesa_lc12 { + uint8_t vregs[0x200]; /* 0x000 */ + uint8_t reserved200[0x400 - 0x200]; /* 0x200 */ + struct gs_cb gs_cb; /* 0x400 */ + uint8_t reserved420[0x800 - 0x420]; /* 0x420 */ + uint8_t reserved800[0x1000 - 0x800]; /* 0x800 */ +}; + +static struct mcesa_lc12 adtl_status __attribute__((aligned(4096))); + +static uint8_t expected_vec_contents[VEC_REGISTER_NUM][VEC_REGISTER_SIZE]; + +static struct gs_cb gs_cb; +static struct gs_epl gs_epl; + +static bool memisset(void *s, int c, size_t n) +{ + uint8_t *p = s; + size_t i; + + for (i = 0; i < n; i++) { + if (p[i] != c) { + return false; + } + } + + return true; +} + +static void wait_for_flag(void) +{ + while (!testflag) + mb(); +} + +static void set_flag(int val) +{ + mb(); + testflag = val; + mb(); +} + +static void test_func(void) +{ + set_flag(1); +} + +static bool have_adtl_status(void) +{ + return test_facility(133) || test_facility(129); +} + +static void test_store_adtl_status(void) +{ + uint32_t status = -1; + int cc; + + report_prefix_push("store additional status"); + + if (!have_adtl_status()) { + report_skip("no guarded-storage or vector facility installed"); + goto out; + } + + memset(&adtl_status, 0xff, sizeof(adtl_status)); + + report_prefix_push("running"); + smp_cpu_restart(1); + + cc = smp_sigp(1, SIGP_STORE_ADDITIONAL_STATUS, + (unsigned long)&adtl_status, &status); + + report(cc == 1, "CC = 1"); + report(status == SIGP_STATUS_INCORRECT_STATE, "status = INCORRECT_STATE"); + report(memisset(&adtl_status, 0xff, sizeof(adtl_status)), + "additional status not touched"); + + report_prefix_pop(); + + report_prefix_push("invalid CPU address"); + + cc = sigp(INVALID_CPU_ADDRESS, SIGP_STORE_ADDITIONAL_STATUS, + (unsigned long)&adtl_status, &status); + report(cc == 3, "CC = 3"); + report(memisset(&adtl_status, 0xff, sizeof(adtl_status)), + "additional status not touched"); + + report_prefix_pop(); + + report_prefix_push("unaligned"); + smp_cpu_stop(1); + + cc = smp_sigp(1, SIGP_STORE_ADDITIONAL_STATUS, + (unsigned long)&adtl_status + 256, &status); + report(cc == 1, "CC = 1"); + report(status == SIGP_STATUS_INVALID_PARAMETER, "status = INVALID_PARAMETER"); + report(memisset(&adtl_status, 0xff, sizeof(adtl_status)), + "additional status not touched"); + + report_prefix_pop(); + +out: + report_prefix_pop(); +} + +static void test_store_adtl_status_unavail(void) +{ + uint32_t status = 0; + int cc; + + report_prefix_push("store additional status unavailable"); + + if (have_adtl_status()) { + report_skip("guarded-storage or vector facility installed"); + goto out; + } + + report_prefix_push("not accepted"); + smp_cpu_stop(1); + + memset(&adtl_status, 0xff, sizeof(adtl_status)); + + cc = smp_sigp(1, SIGP_STORE_ADDITIONAL_STATUS, + (unsigned long)&adtl_status, &status); + + report(cc == 1, "CC = 1"); + report(status == SIGP_STATUS_INVALID_ORDER, + "status = INVALID_ORDER"); + report(memisset(&adtl_status, 0xff, sizeof(adtl_status)), + "additional status not touched"); + + report_prefix_pop(); + +out: + report_prefix_pop(); +} + +static void restart_write_vector(void) +{ + uint8_t *vec_reg; + /* vlm handles at most 16 registers at a time */ + uint8_t *vec_reg_16_31 = &expected_vec_contents[16][0]; + uint64_t cr0, cr0_mask = ~(1ULL << CTL0_VECTOR); + int one = 1; + int i; + + for (i = 0; i < VEC_REGISTER_NUM; i++) { + vec_reg = &expected_vec_contents[i][0]; + /* i+1 to avoid zero content */ + memset(vec_reg, i + 1, VEC_REGISTER_SIZE); + } + + ctl_set_bit(0, CTL0_VECTOR); + + asm volatile ( + " .machine z13\n" + /* load vector registers */ + " vlm 0,15, %[vec_reg_0_15]\n" + " vlm 16,31, %[vec_reg_16_31]\n" + /* turn off vector instructions */ + " stctg 0,0, %[cr0]\n" + " ng %[cr0_mask], %[cr0]\n" + " stg %[cr0_mask], %[cr0]\n" + " lctlg 0,0, %[cr0]\n" + /* inform CPU 0 we are done by setting testflag to 1 */ + " st %[one], %[testflag]\n" + /* + * infinite loop. function epilogue will restore floating point + * registers and hence destroy vector register contents + */ + "0: j 0\n" + : [cr0_mask] "+&d"(cr0_mask) + : [vec_reg_0_15] "Q"(expected_vec_contents), + [vec_reg_16_31] "Q"(*vec_reg_16_31), + [cr0] "Q"(cr0), + [testflag] "T"(testflag), + [one] "d"(one) + : "v0", "v1", "v2", "v3", "v4", "v5", "v6", "v7", "v8", "v9", + "v10", "v11", "v12", "v13", "v14", "v15", "v16", "v17", "v18", + "v19", "v20", "v21", "v22", "v23", "v24", "v25", "v26", "v27", + "v28", "v29", "v30", "v31", "cc", "memory" + ); +} + +static void cpu_write_magic_to_vector_regs(uint16_t cpu_idx) +{ + struct psw new_psw; + + smp_cpu_stop(cpu_idx); + + new_psw.mask = extract_psw_mask(); + new_psw.addr = (unsigned long)restart_write_vector; + + set_flag(0); + + smp_cpu_start(cpu_idx, new_psw); + + wait_for_flag(); +} + +static int adtl_status_check_unmodified_fields_for_lc(unsigned long lc) +{ + assert (!lc || (lc >= 10 && lc <= 12)); + + if (lc <= 10 && !memisset(&adtl_status.gs_cb, 0xff, sizeof(adtl_status.gs_cb))) + return false; + + if (!memisset(adtl_status.reserved200, 0xff, sizeof(adtl_status.reserved200))) + return false; + + if (!memisset(adtl_status.reserved420, 0xff, sizeof(adtl_status.reserved420))) + return false; + + if (!memisset(adtl_status.reserved800, 0xff, sizeof(adtl_status.reserved800))) + return false; + + return true; +} + +static void __store_adtl_status_vector_lc(unsigned long lc) +{ + uint32_t status = -1; + struct psw psw; + int cc; + + report_prefix_pushf("LC %lu", lc); + + if (!test_facility(133) && lc) { + report_skip("not supported, no guarded-storage facility"); + goto out; + } + + cpu_write_magic_to_vector_regs(1); + smp_cpu_stop(1); + + memset(&adtl_status, 0xff, sizeof(adtl_status)); + + cc = smp_sigp(1, SIGP_STORE_ADDITIONAL_STATUS, + (unsigned long)&adtl_status | lc, &status); + report(!cc, "CC = 0"); + + report(!memcmp(adtl_status.vregs, + expected_vec_contents, sizeof(expected_vec_contents)), + "additional status contents match"); + + report(adtl_status_check_unmodified_fields_for_lc(lc), + "no write outside expected fields"); + + /* + * To avoid the floating point/vector registers being cleaned up, we + * stopped CPU1 right in the middle of a function. Hence the cleanup of + * the function didn't run yet and the stackpointer is messed up. + * Destroy and re-initalize the CPU to fix that. + */ + smp_cpu_destroy(1); + psw.mask = extract_psw_mask(); + psw.addr = (unsigned long)test_func; + smp_cpu_setup(1, psw); + +out: + report_prefix_pop(); +} + +static void test_store_adtl_status_vector(void) +{ + report_prefix_push("store additional status vector"); + + if (!test_facility(129)) { + report_skip("vector facility not installed"); + goto out; + } + + __store_adtl_status_vector_lc(0); + __store_adtl_status_vector_lc(10); + __store_adtl_status_vector_lc(11); + __store_adtl_status_vector_lc(12); + +out: + report_prefix_pop(); +} + +static void restart_write_gs_regs(void) +{ + const unsigned long gs_area = 0x2000000; + const unsigned long gsc = 25; /* align = 32 M, section size = 512K */ + + ctl_set_bit(2, CTL2_GUARDED_STORAGE); + + gs_cb.gsd = gs_area | gsc; + gs_cb.gssm = 0xfeedc0ffe; + gs_cb.gs_epl_a = (uint64_t) &gs_epl; + + load_gs_cb(&gs_cb); + + set_flag(1); + + ctl_clear_bit(2, CTL2_GUARDED_STORAGE); + + /* + * Safe to return here. r14 will point to the endless loop in + * smp_cpu_setup_state. + */ +} + +static void cpu_write_to_gs_regs(uint16_t cpu_idx) +{ + struct psw new_psw; + + smp_cpu_stop(cpu_idx); + + new_psw.mask = extract_psw_mask(); + new_psw.addr = (unsigned long)restart_write_gs_regs; + + set_flag(0); + + smp_cpu_start(cpu_idx, new_psw); + + wait_for_flag(); +} + +static void __store_adtl_status_gs(unsigned long lc) +{ + uint32_t status = 0; + int cc; + + report_prefix_pushf("LC %lu", lc); + + cpu_write_to_gs_regs(1); + smp_cpu_stop(1); + + memset(&adtl_status, 0xff, sizeof(adtl_status)); + + cc = smp_sigp(1, SIGP_STORE_ADDITIONAL_STATUS, + (unsigned long)&adtl_status | lc, &status); + report(!cc, "CC = 0"); + + report(!memcmp(&adtl_status.gs_cb, &gs_cb, sizeof(gs_cb)), + "additional status contents match"); + + report(adtl_status_check_unmodified_fields_for_lc(lc), + "no write outside expected fields"); + + report_prefix_pop(); +} + +static void test_store_adtl_status_gs(void) +{ + report_prefix_push("store additional status guarded-storage"); + + if (!test_facility(133)) { + report_skip("guarded-storage facility not installed"); + goto out; + } + + __store_adtl_status_gs(11); + __store_adtl_status_gs(12); + +out: + report_prefix_pop(); +} + +int main(void) +{ + struct psw psw; + report_prefix_push("adtl_status"); + + if (smp_query_num_cpus() == 1) { + report_skip("need at least 2 cpus for this test"); + goto done; + } + + /* Setting up the cpu to give it a stack and lowcore */ + psw.mask = extract_psw_mask(); + psw.addr = (unsigned long)test_func; + smp_cpu_setup(1, psw); + smp_cpu_stop(1); + + test_store_adtl_status_unavail(); + test_store_adtl_status_vector(); + test_store_adtl_status_gs(); + test_store_adtl_status(); + smp_cpu_destroy(1); + +done: + report_prefix_pop(); + return report_summary(); +} diff --git a/s390x/unittests.cfg b/s390x/unittests.cfg index 1600e714c8b9..2159ba679519 100644 --- a/s390x/unittests.cfg +++ b/s390x/unittests.cfg @@ -136,3 +136,28 @@ file = firq.elf timeout = 20 extra_params = -smp 1,maxcpus=3 -cpu qemu -device qemu-s390x-cpu,core-id=2 -device qemu-s390x-cpu,core-id=1 accel = tcg + +[adtl-status-kvm] +file = adtl-status.elf +smp = 2 +accel = kvm +extra_params = -cpu host,gs=on,vx=on + +[adtl-status-no-vec-no-gs-kvm] +file = adtl-status.elf +smp = 2 +accel = kvm +extra_params = -cpu host,gs=off,vx=off + +[adtl-status-tcg] +file = adtl-status.elf +smp = 2 +accel = tcg +# no guarded-storage support in tcg +extra_params = -cpu qemu,vx=on + +[adtl-status-no-vec-no-gs-tcg] +file = adtl-status.elf +smp = 2 +accel = tcg +extra_params = -cpu qemu,gs=off,vx=off