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envelope-from=freude@linux.ibm.com; helo=mx0b-001b2d01.pphosted.com X-Spam_score_int: -26 X-Spam_score: -2.7 X-Spam_bar: -- X-Spam_report: (-2.7 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_LOW=-0.7, RCVD_IN_MSPIKE_H3=-0.01, RCVD_IN_MSPIKE_WL=-0.01, 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: qemu development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Reply-To: freude@linux.ibm.com Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org On 2026-07-14 21:17, Ilya Leoshkevich wrote: > Add a small test that issues a large PRNO TRNG request while a timer is > running, and checks that the timer interrupts it several times. > > Signed-off-by: Ilya Leoshkevich > --- > tests/tcg/s390x/Makefile.target | 1 + > tests/tcg/s390x/prno-trng.c | 67 +++++++++++++++++++++++++++++++++ > 2 files changed, 68 insertions(+) > create mode 100644 tests/tcg/s390x/prno-trng.c > > diff --git a/tests/tcg/s390x/Makefile.target > b/tests/tcg/s390x/Makefile.target > index 0ca030ded01..48cba4cdfa4 100644 > --- a/tests/tcg/s390x/Makefile.target > +++ b/tests/tcg/s390x/Makefile.target > @@ -75,6 +75,7 @@ Z13_TESTS+=vcksm > Z13_TESTS+=vstl > Z13_TESTS+=vrep > Z13_TESTS+=precise-smc-user > +Z13_TESTS+=prno-trng > $(Z13_TESTS): CFLAGS+=-march=z13 -O2 > TESTS+=$(Z13_TESTS) > > diff --git a/tests/tcg/s390x/prno-trng.c b/tests/tcg/s390x/prno-trng.c > new file mode 100644 > index 00000000000..43eea5db1dc > --- /dev/null > +++ b/tests/tcg/s390x/prno-trng.c > @@ -0,0 +1,67 @@ > +/* > + * Test that PERFORM RANDOM NUMBER OPERATION TRNG is interruptible. > + * > + * SPDX-License-Identifier: GPL-2.0-or-later > + */ > +#include > +#include > +#include > +#include > +#include > +#include > +#include > + > +static unsigned char buf1[16 * 1024 * 1024]; > +static unsigned char buf2[16 * 1024 * 1024]; > + > +static volatile sig_atomic_t interrupted; > + > +static void sigprof_handler(int sig, siginfo_t *info, void *ucontext) > +{ > + struct ucontext *uc = ucontext; > + unsigned long addr = uc->uc_mcontext.regs.psw.addr; > + > + if (*(unsigned short *)(addr - 4) == 0xb93c) { > + interrupted++; > + } > +} > + > +static void prno_trng(void *b1, unsigned long l1, void *b2, unsigned > long l2) > +{ > + register unsigned long r0 asm("r0") = 114; /* TRNG */ > + register unsigned long r2 asm("r2") = (unsigned long)b1; > + register unsigned long r3 asm("r3") = l1; > + register unsigned long r4 asm("r4") = (unsigned long)b2; > + register unsigned long r5 asm("r5") = l2; > + > + asm volatile("0: ppno %[r2],%[r4]\n" /* prno alias for old > toolchains */ > + " jo 0b" > + : [r2] "+r" (r2), [r3] "+r" (r3) > + , [r4] "+r" (r4), [r5] "+r" (r5) > + : "r" (r0) > + : "cc", "memory"); > +} > + > +int main(void) > +{ > + struct itimerval it = { > + .it_interval = { .tv_usec = 10000 }, /* 0.01s */ > + .it_value = { .tv_usec = 10000 }, > + }; > + struct sigaction act = { > + .sa_sigaction = sigprof_handler, > + .sa_flags = SA_SIGINFO, > + }; > + int err; > + > + err = sigaction(SIGPROF, &act, NULL); > + assert(err == 0); > + err = setitimer(ITIMER_PROF, &it, NULL); > + assert(err == 0); > + > + prno_trng(buf1, sizeof(buf1), buf2, sizeof(buf2)); > + printf("interrupted %d times\n", interrupted); > + assert(interrupted >= 3); > + > + return EXIT_SUCCESS; > +} Reviewed-by: Harald Freudenberger