Author: trasz Date: Tue Dec 31 22:01:08 2019 New Revision: 356241 URL: https://svnweb.freebsd.org/changeset/base/356241
Log: Add basic getcpu(2) support to linuxulator. The purpose of this syscall is to query the CPU number and the NUMA domain the calling thread is currently running on. The third argument is ignored. It doesn't do anything regarding scheduling - it's literally just a way to query the current state, without any guarantees you won't get rescheduled an opcode later. This unbreaks Java from CentOS 8 (java-11-openjdk-11.0.5.10-0.el8_0.x86_64). Reviewed by: kib MFC after: 2 weeks Sponsored by: The FreeBSD Foundation Differential Revision: https://reviews.freebsd.org/D22972 Modified: head/sys/amd64/linux/linux_dummy.c head/sys/amd64/linux32/linux32_dummy.c head/sys/arm64/linux/linux_dummy.c head/sys/compat/linux/linux_misc.c head/sys/i386/linux/linux_dummy.c Modified: head/sys/amd64/linux/linux_dummy.c ============================================================================== --- head/sys/amd64/linux/linux_dummy.c Tue Dec 31 18:58:29 2019 (r356240) +++ head/sys/amd64/linux/linux_dummy.c Tue Dec 31 22:01:08 2019 (r356241) @@ -102,8 +102,6 @@ DUMMY(tee); DUMMY(vmsplice); /* Linux 2.6.18: */ DUMMY(move_pages); -/* Linux 2.6.19: */ -DUMMY(getcpu); /* Linux 2.6.22: */ DUMMY(signalfd); /* Linux 2.6.27: */ Modified: head/sys/amd64/linux32/linux32_dummy.c ============================================================================== --- head/sys/amd64/linux32/linux32_dummy.c Tue Dec 31 18:58:29 2019 (r356240) +++ head/sys/amd64/linux32/linux32_dummy.c Tue Dec 31 22:01:08 2019 (r356241) @@ -108,8 +108,6 @@ DUMMY(tee); DUMMY(vmsplice); /* Linux 2.6.18: */ DUMMY(move_pages); -/* Linux 2.6.19: */ -DUMMY(getcpu); /* Linux 2.6.22: */ DUMMY(signalfd); /* Linux 2.6.27: */ Modified: head/sys/arm64/linux/linux_dummy.c ============================================================================== --- head/sys/arm64/linux/linux_dummy.c Tue Dec 31 18:58:29 2019 (r356240) +++ head/sys/arm64/linux/linux_dummy.c Tue Dec 31 22:01:08 2019 (r356241) @@ -104,8 +104,6 @@ DUMMY(tee); DUMMY(vmsplice); /* Linux 2.6.18: */ DUMMY(move_pages); -/* Linux 2.6.19: */ -DUMMY(getcpu); /* Linux 2.6.27: */ DUMMY(signalfd4); DUMMY(inotify_init1); Modified: head/sys/compat/linux/linux_misc.c ============================================================================== --- head/sys/compat/linux/linux_misc.c Tue Dec 31 18:58:29 2019 (r356240) +++ head/sys/compat/linux/linux_misc.c Tue Dec 31 22:01:08 2019 (r356241) @@ -2353,3 +2353,19 @@ out: td->td_retval[0] = dst - args->buf; return (error); } + +int +linux_getcpu(struct thread *td, struct linux_getcpu_args *args) +{ + int cpu, error, node; + + cpu = td->td_oncpu; /* Make sure it doesn't change during copyout(9) */ + error = 0; + node = 0; /* XXX: Fake NUMA node 0 for now */ + + if (args->cpu != NULL) + error = copyout(&cpu, args->cpu, sizeof(l_int)); + if (args->node != NULL) + error = copyout(&node, args->node, sizeof(l_int)); + return (error); +} Modified: head/sys/i386/linux/linux_dummy.c ============================================================================== --- head/sys/i386/linux/linux_dummy.c Tue Dec 31 18:58:29 2019 (r356240) +++ head/sys/i386/linux/linux_dummy.c Tue Dec 31 22:01:08 2019 (r356241) @@ -104,8 +104,6 @@ DUMMY(tee); DUMMY(vmsplice); /* Linux 2.6.18: */ DUMMY(move_pages); -/* Linux 2.6.19: */ -DUMMY(getcpu); /* Linux 2.6.22: */ DUMMY(signalfd); /* Linux 2.6.27: */ _______________________________________________ svn-src-head@freebsd.org mailing list https://lists.freebsd.org/mailman/listinfo/svn-src-head To unsubscribe, send any mail to "svn-src-head-unsubscr...@freebsd.org"
