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Mon, 7 Aug 2023 11:49:25 +0000 (GMT) Received: from smtpav06.fra02v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 82E0320040; Mon, 7 Aug 2023 11:49:25 +0000 (GMT) Received: from heavy.boeblingen.de.ibm.com (unknown [9.155.200.166]) by smtpav06.fra02v.mail.ibm.com (Postfix) with ESMTP; Mon, 7 Aug 2023 11:49:25 +0000 (GMT) From: Ilya Leoshkevich To: Richard Henderson , David Hildenbrand , Thomas Huth Cc: qemu-s390x@nongnu.org, qemu-devel@nongnu.org, Ilya Leoshkevich Subject: [PATCH 2/2] tests/tcg/s390x: Test precise self-modifying code handling Date: Mon, 7 Aug 2023 13:48:21 +0200 Message-ID: <20230807114921.438881-2-iii@linux.ibm.com> X-Mailer: git-send-email 2.41.0 In-Reply-To: <20230807114921.438881-1-iii@linux.ibm.com> References: <20230807114921.438881-1-iii@linux.ibm.com> MIME-Version: 1.0 X-TM-AS-GCONF: 00 X-Proofpoint-GUID: g_4HrDBDVIjgTZILMSB1q7taEBo1ardD X-Proofpoint-ORIG-GUID: 6cCITDaFUbfx57azgUCbXQ2vctDbMjYf X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.267,Aquarius:18.0.957,Hydra:6.0.591,FMLib:17.11.176.26 definitions=2023-08-07_10,2023-08-03_01,2023-05-22_02 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 priorityscore=1501 bulkscore=0 clxscore=1015 adultscore=0 mlxscore=0 impostorscore=0 lowpriorityscore=0 malwarescore=0 suspectscore=0 spamscore=0 phishscore=0 mlxlogscore=928 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2306200000 definitions=main-2308070107 Received-SPF: pass client-ip=148.163.158.5; envelope-from=iii@linux.ibm.com; helo=mx0b-001b2d01.pphosted.com X-Spam_score_int: -19 X-Spam_score: -2.0 X-Spam_bar: -- X-Spam_report: (-2.0 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_MSPIKE_H5=0.001, RCVD_IN_MSPIKE_WL=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Add small softmmu and user tests to prevent regressions. Signed-off-by: Ilya Leoshkevich --- tests/tcg/s390x/Makefile.softmmu-target | 1 + tests/tcg/s390x/Makefile.target | 1 + tests/tcg/s390x/precise-smc-softmmu.S | 63 +++++++++++++++++++++++++ tests/tcg/s390x/precise-smc-user.c | 39 +++++++++++++++ 4 files changed, 104 insertions(+) create mode 100644 tests/tcg/s390x/precise-smc-softmmu.S create mode 100644 tests/tcg/s390x/precise-smc-user.c diff --git a/tests/tcg/s390x/Makefile.softmmu-target b/tests/tcg/s390x/Makefile.softmmu-target index 76345b6e643..1a1f088b280 100644 --- a/tests/tcg/s390x/Makefile.softmmu-target +++ b/tests/tcg/s390x/Makefile.softmmu-target @@ -25,6 +25,7 @@ ASM_TESTS = \ lpswe-early \ lra \ mc \ + precise-smc-softmmu \ ssm-early \ stosm-early \ stpq \ diff --git a/tests/tcg/s390x/Makefile.target b/tests/tcg/s390x/Makefile.target index 4f3793532bf..b5f88c20fc6 100644 --- a/tests/tcg/s390x/Makefile.target +++ b/tests/tcg/s390x/Makefile.target @@ -60,6 +60,7 @@ Z13_TESTS+=lcbb Z13_TESTS+=locfhr Z13_TESTS+=vcksm Z13_TESTS+=vstl +Z13_TESTS+=precise-smc-user $(Z13_TESTS): CFLAGS+=-march=z13 -O2 TESTS+=$(Z13_TESTS) diff --git a/tests/tcg/s390x/precise-smc-softmmu.S b/tests/tcg/s390x/precise-smc-softmmu.S new file mode 100644 index 00000000000..f7fa57d899d --- /dev/null +++ b/tests/tcg/s390x/precise-smc-softmmu.S @@ -0,0 +1,63 @@ +/* + * Test s390x-softmmu precise self-modifying code handling. + * + * SPDX-License-Identifier: GPL-2.0-or-later + */ + .org 0x8e +program_interruption_code: + .org 0x150 +program_old_psw: + .org 0x1D0 /* program new PSW */ + .quad 0x180000000,pgm /* 64-bit mode */ + .org 0x200 /* lowcore padding */ + .globl _start +_start: + lctlg %c0,%c0,c0 + lghi %r0,15 + + /* Test 1: replace sgr with agr. */ + lghi %r1,21 + vl %v0,patch1 + jg 1f /* start a new TB */ +0: + .org . + 6 /* pad patched code to 16 bytes */ +1: + vstl %v0,%r0,0b /* start writing before TB */ + sgr %r1,%r1 /* this becomes `agr %r1,%r1` */ + cgijne %r1,42,failure + + /* Test 2: replace agr with division by zero. */ + vl %v0,patch2 + jg 1f /* start a new TB */ +0: + .org . + 6 /* pad patched code to 16 bytes */ +1: + vstl %v0,%r0,0b /* start writing before TB */ + sgr %r1,%r1 /* this becomes `d %r0,zero` */ +failure: + lpswe failure_psw + +pgm: + chhsi program_interruption_code,0x9 /* divide exception? */ + jne failure + clc program_old_psw(16),expected_old_psw2 /* correct old PSW? */ + jne failure + lpswe success_psw + +patch1: + .fill 12 /* replaces padding and stpq */ + agr %r1,%r1 /* replaces sgr */ +patch2: + .fill 12 /* replaces padding and stpq */ + d %r0,zero /* replaces sgr */ +zero: + .long 0 +expected_old_psw2: + .quad 0x200180000000,failure /* cc is from addition */ + .align 8 +c0: + .quad 0x60000 /* AFP, VX */ +success_psw: + .quad 0x2000000000000,0xfff /* see is_special_wait_psw() */ +failure_psw: + .quad 0x2000000000000,0 /* disabled wait */ diff --git a/tests/tcg/s390x/precise-smc-user.c b/tests/tcg/s390x/precise-smc-user.c new file mode 100644 index 00000000000..33a5270865c --- /dev/null +++ b/tests/tcg/s390x/precise-smc-user.c @@ -0,0 +1,39 @@ +/* + * Test s390x-linux-user precise self-modifying code handling. + * + * SPDX-License-Identifier: GPL-2.0-or-later + */ +#include +#include +#include +#include + +extern __uint128_t __attribute__((__aligned__(1))) smc; +extern __uint128_t __attribute__((__aligned__(1))) patch; + +int main(void) +{ + char *aligned_smc = (char *)((uintptr_t)&smc & ~0xFFFULL); + char *smc_end = (char *)&smc + sizeof(smc); + uint64_t value = 21; + int err; + + err = mprotect(aligned_smc, smc_end - aligned_smc, + PROT_READ | PROT_WRITE | PROT_EXEC); + assert(err == 0); + + asm("jg 0f\n" /* start a new TB */ + "patch: .byte 0,0,0,0,0,0\n" /* replaces padding */ + ".byte 0,0,0,0,0,0\n" /* replaces vstl */ + "agr %[value],%[value]\n" /* replaces sgr */ + "smc: .org . + 6\n" /* pad patched code to 16 bytes */ + "0: vstl %[patch],%[idx],%[smc]\n" /* start writing before TB */ + "sgr %[value],%[value]" /* this becomes `agr %r0,%r0` */ + : [smc] "=R" (smc) + , [value] "+r" (value) + : [patch] "v" (patch) + , [idx] "r" (sizeof(patch) - 1) + : "cc"); + + return value == 42 ? EXIT_SUCCESS : EXIT_FAILURE; +}