From patchwork Mon Nov 6 16:37:29 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Nico Boehr X-Patchwork-Id: 13447181 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 6950929434 for ; Mon, 6 Nov 2023 16:37:50 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=ibm.com header.i=@ibm.com header.b="SeGlmnpy" Received: from mx0a-001b2d01.pphosted.com (mx0a-001b2d01.pphosted.com [148.163.156.1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 60EAC10EF; Mon, 6 Nov 2023 08:37:46 -0800 (PST) Received: from pps.filterd (m0353727.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.17.1.19/8.17.1.19) with ESMTP id 3A6GHRZK009457; Mon, 6 Nov 2023 16:37:46 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=nIdEzcQdCC2NygmvdSfMIRxrI1Hw2uh757LfcEPSGig=; b=SeGlmnpye/XsHDUiFHjR3QdhS26h6Xl6uEy0xtPwGKyI9Ebtde7HafpuodWA7nC/1Zrd 8YLiVOFThsBgIhhSTZmFOd771+e4td92WBtW4FK15MVk3Rm3fHCCYUIxTLfiEsG4R1G/ DllSdAbhNvnG4mXGkDGXB+fJbgk9Tug8AReeI0vaSTOf9OHNTjQfr3V3F/L9hmqFVB60 gSh4tO6rWkxnsuQ6/lrkR4j0TJrqwBDH3vF6NGwb0ukmo13SOMi8+hZ5qDsfgHK00GuM /Fc9gNOWoZehGzUhC1WwqwjPpfu/EDqrWD3Xbqp5TT6dYM0WDXNaZ7R9RmDHgDhnz7ss zA== Received: from pps.reinject (localhost [127.0.0.1]) by mx0a-001b2d01.pphosted.com (PPS) with ESMTPS id 3u73hg8ra0-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Mon, 06 Nov 2023 16:37:45 +0000 Received: from m0353727.ppops.net (m0353727.ppops.net [127.0.0.1]) by pps.reinject (8.17.1.5/8.17.1.5) with ESMTP id 3A6GM2Vf031833; Mon, 6 Nov 2023 16:37:45 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 3u73hg8r99-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Mon, 06 Nov 2023 16:37:45 +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 3A6GCP8k025666; Mon, 6 Nov 2023 16:37:44 GMT Received: from smtprelay05.fra02v.mail.ibm.com ([9.218.2.225]) by ppma21.wdc07v.mail.ibm.com (PPS) with ESMTPS id 3u619namxm-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Mon, 06 Nov 2023 16:37:43 +0000 Received: from smtpav05.fra02v.mail.ibm.com (smtpav05.fra02v.mail.ibm.com [10.20.54.104]) by smtprelay05.fra02v.mail.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id 3A6GbeWi20906544 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Mon, 6 Nov 2023 16:37:40 GMT Received: from smtpav05.fra02v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id CB58C20040; Mon, 6 Nov 2023 16:37:40 +0000 (GMT) Received: from smtpav05.fra02v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 915552004D; Mon, 6 Nov 2023 16:37:40 +0000 (GMT) Received: from t35lp63.lnxne.boe (unknown [9.152.108.100]) by smtpav05.fra02v.mail.ibm.com (Postfix) with ESMTP; Mon, 6 Nov 2023 16:37:40 +0000 (GMT) From: Nico Boehr To: frankja@linux.ibm.com, imbrenda@linux.ibm.com, thuth@redhat.com, hca@linux.ibm.com Cc: kvm@vger.kernel.org, linux-s390@vger.kernel.org Subject: [kvm-unit-tests PATCH v8 7/8] s390x: add a test for SIE without MSO/MSL Date: Mon, 6 Nov 2023 17:37:29 +0100 Message-ID: <20231106163738.1116942-8-nrb@linux.ibm.com> X-Mailer: git-send-email 2.41.0 In-Reply-To: <20231106163738.1116942-1-nrb@linux.ibm.com> References: <20231106163738.1116942-1-nrb@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: m9BDRcHBe-TxFOD5KYdj1duX7a2YlP1k X-Proofpoint-ORIG-GUID: 7s6VRp9Ik4pRHTQzaOww4PtcjwoKkq-t 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=2023-11-06_12,2023-11-02_03,2023-05-22_02 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 bulkscore=0 spamscore=0 impostorscore=0 priorityscore=1501 clxscore=1015 lowpriorityscore=0 mlxlogscore=999 adultscore=0 mlxscore=0 phishscore=0 suspectscore=0 malwarescore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2310240000 definitions=main-2311060134 Since we now have the ability to run guests without MSO/MSL, add a test to make sure this doesn't break. Signed-off-by: Nico Boehr Reviewed-by: Thomas Huth Reviewed-by: Claudio Imbrenda Reviewed-by: Janosch Frank --- s390x/Makefile | 2 + s390x/sie-dat.c | 111 +++++++++++++++++++++++++++++++++++++ s390x/snippets/c/sie-dat.c | 57 +++++++++++++++++++ s390x/snippets/c/sie-dat.h | 2 + s390x/unittests.cfg | 3 + 5 files changed, 175 insertions(+) create mode 100644 s390x/sie-dat.c create mode 100644 s390x/snippets/c/sie-dat.c create mode 100644 s390x/snippets/c/sie-dat.h diff --git a/s390x/Makefile b/s390x/Makefile index 947a4344738f..f79fd0098312 100644 --- a/s390x/Makefile +++ b/s390x/Makefile @@ -41,6 +41,7 @@ tests += $(TEST_DIR)/migration-sck.elf tests += $(TEST_DIR)/exittime.elf tests += $(TEST_DIR)/ex.elf tests += $(TEST_DIR)/topology.elf +tests += $(TEST_DIR)/sie-dat.elf pv-tests += $(TEST_DIR)/pv-diags.elf pv-tests += $(TEST_DIR)/pv-icptcode.elf @@ -123,6 +124,7 @@ snippet_lib = $(snippet_asmlib) lib/auxinfo.o # perquisites (=guests) for the snippet hosts. # $(TEST_DIR)/.elf: snippets = $(SNIPPET_DIR)//.gbin $(TEST_DIR)/mvpg-sie.elf: snippets = $(SNIPPET_DIR)/c/mvpg-snippet.gbin +$(TEST_DIR)/sie-dat.elf: snippets = $(SNIPPET_DIR)/c/sie-dat.gbin $(TEST_DIR)/spec_ex-sie.elf: snippets = $(SNIPPET_DIR)/c/spec_ex.gbin $(TEST_DIR)/pv-diags.elf: pv-snippets += $(SNIPPET_DIR)/asm/pv-diag-yield.gbin diff --git a/s390x/sie-dat.c b/s390x/sie-dat.c new file mode 100644 index 000000000000..3459fa1ccec3 --- /dev/null +++ b/s390x/sie-dat.c @@ -0,0 +1,111 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ +/* + * Tests SIE with paging. + * + * Copyright 2023 IBM Corp. + * + * Authors: + * Nico Boehr + */ +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include "snippets/c/sie-dat.h" + +static struct vm vm; +static pgd_t *guest_root; + +static void test_sie_dat(void) +{ + uint64_t test_page_gpa, test_page_hpa; + uint8_t *test_page_hva, expected_val; + bool contents_match; + uint8_t r1; + + /* guest will tell us the guest physical address of the test buffer */ + sie(&vm); + assert(vm.sblk->icptcode == ICPT_INST && + (vm.sblk->ipa & 0xff00) == 0x8300 && vm.sblk->ipb == 0x9c0000); + + r1 = (vm.sblk->ipa & 0xf0) >> 4; + test_page_gpa = vm.save_area.guest.grs[r1]; + test_page_hpa = virt_to_pte_phys(guest_root, (void*)test_page_gpa); + test_page_hva = __va(test_page_hpa); + report_info("test buffer gpa=0x%lx hva=%p", test_page_gpa, test_page_hva); + + /* guest will now write to the test buffer and we verify the contents */ + sie(&vm); + assert(vm.sblk->icptcode == ICPT_INST && + vm.sblk->ipa == 0x8300 && vm.sblk->ipb == 0x440000); + + contents_match = true; + for (unsigned int i = 0; i < GUEST_TEST_PAGE_COUNT; i++) { + expected_val = 42 + i; + if (test_page_hva[i * PAGE_SIZE] != expected_val) { + report_fail("page %u mismatch actual_val=%x expected_val=%x", + i, test_page_hva[i], expected_val); + contents_match = false; + } + } + report(contents_match, "test buffer contents match"); + + /* the guest will now write to an unmapped address and we check that this causes a segment translation exception */ + report_prefix_push("guest write to unmapped"); + expect_pgm_int(); + sie(&vm); + check_pgm_int_code(PGM_INT_CODE_SEGMENT_TRANSLATION); + report((lowcore.trans_exc_id & PAGE_MASK) == (GUEST_TOTAL_PAGE_COUNT * PAGE_SIZE), "TEID address match"); + report_prefix_pop(); +} + +static void setup_guest(void) +{ + extern const char SNIPPET_NAME_START(c, sie_dat)[]; + extern const char SNIPPET_NAME_END(c, sie_dat)[]; + uint64_t guest_max_addr; + + setup_vm(); + snippet_setup_guest(&vm, false); + + /* allocate a region-1 table */ + guest_root = pgd_alloc_one(); + + /* map guest memory 1:1 */ + guest_max_addr = GUEST_TOTAL_PAGE_COUNT * PAGE_SIZE; + for (uint64_t i = 0; i < guest_max_addr; i += PAGE_SIZE) + install_page(guest_root, __pa(vm.guest_mem + i), (void *)i); + + /* set up storage limit supression - leave mso and msl intact they are ignored anyways */ + vm.sblk->cpuflags |= CPUSTAT_SM; + + /* set up the guest asce */ + vm.save_area.guest.asce = __pa(guest_root) | ASCE_DT_REGION1 | REGION_TABLE_LENGTH; + + snippet_init(&vm, SNIPPET_NAME_START(c, sie_dat), + SNIPPET_LEN(c, sie_dat), SNIPPET_UNPACK_OFF); +} + +int main(void) +{ + report_prefix_push("sie-dat"); + if (!sclp_facilities.has_sief2) { + report_skip("SIEF2 facility unavailable"); + goto done; + } + + setup_guest(); + test_sie_dat(); + sie_guest_destroy(&vm); + +done: + report_prefix_pop(); + return report_summary(); + +} diff --git a/s390x/snippets/c/sie-dat.c b/s390x/snippets/c/sie-dat.c new file mode 100644 index 000000000000..ecfcb60e6b3f --- /dev/null +++ b/s390x/snippets/c/sie-dat.c @@ -0,0 +1,57 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ +/* + * Snippet used by the sie-dat.c test to verify paging without MSO/MSL + * + * Copyright (c) 2023 IBM Corp + * + * Authors: + * Nico Boehr + */ +#include +#include +#include "sie-dat.h" + +static uint8_t test_pages[GUEST_TEST_PAGE_COUNT * PAGE_SIZE] __attribute__((__aligned__(PAGE_SIZE))); + +static inline void force_exit(void) +{ + asm volatile("diag 0,0,0x44\n" + : + : + : "memory" + ); +} + +static inline void force_exit_value(uint64_t val) +{ + asm volatile("diag %[val],0,0x9c\n" + : + : [val] "d"(val) + : "memory" + ); +} + +int main(void) +{ + uint8_t *invalid_ptr; + + memset(test_pages, 0, sizeof(test_pages)); + /* tell the host the page's physical address (we're running DAT off) */ + force_exit_value((uint64_t)test_pages); + + /* write some value to the page so the host can verify it */ + for (size_t i = 0; i < GUEST_TEST_PAGE_COUNT; i++) + test_pages[i * PAGE_SIZE] = 42 + i; + + /* indicate we've written all pages */ + force_exit(); + + /* the first unmapped address */ + invalid_ptr = (uint8_t *)(GUEST_TOTAL_PAGE_COUNT * PAGE_SIZE); + *invalid_ptr = 42; + + /* indicate we've written the non-allowed page (should never get here) */ + force_exit(); + + return 0; +} diff --git a/s390x/snippets/c/sie-dat.h b/s390x/snippets/c/sie-dat.h new file mode 100644 index 000000000000..ed3f99f75f9c --- /dev/null +++ b/s390x/snippets/c/sie-dat.h @@ -0,0 +1,2 @@ +#define GUEST_TEST_PAGE_COUNT 10 +#define GUEST_TOTAL_PAGE_COUNT 256 diff --git a/s390x/unittests.cfg b/s390x/unittests.cfg index 68e119e4fcaa..184658ff7d8d 100644 --- a/s390x/unittests.cfg +++ b/s390x/unittests.cfg @@ -247,3 +247,6 @@ file = topology.elf [topology-2] file = topology.elf extra_params = -cpu max,ctop=on -smp sockets=31,cores=8,maxcpus=248 -append '-sockets 31 -cores 8' + +[sie-dat] +file = sie-dat.elf