Date: Tue, 7 Sep 2021 12:09:30 GMT From: Jessica Clarke <jrtc27@FreeBSD.org> To: src-committers@FreeBSD.org, dev-commits-src-all@FreeBSD.org, dev-commits-src-branches@FreeBSD.org Subject: git: c69a739379be - stable/13 - riscv: Implement non-stub __vdso_gettc and __vdso_gettimekeep Message-ID: <202109071209.187C9Uuf086997@gitrepo.freebsd.org>
next in thread | raw e-mail | index | archive | help
The branch stable/13 has been updated by jrtc27: URL: https://cgit.FreeBSD.org/src/commit/?id=c69a739379bea9de88869f7abc3db58f1a16363c commit c69a739379bea9de88869f7abc3db58f1a16363c Author: Jessica Clarke <jrtc27@FreeBSD.org> AuthorDate: 2021-07-05 15:16:53 +0000 Commit: Jessica Clarke <jrtc27@FreeBSD.org> CommitDate: 2021-09-07 12:06:44 +0000 riscv: Implement non-stub __vdso_gettc and __vdso_gettimekeep PR: 256905 Reviewed by: arichardson, mhorne MFC after: 1 week Differential Revision: https://reviews.freebsd.org/D30963 (cherry picked from commit 348c41d1815dc2e872a1deba1f4bf760caaa1094) --- lib/libc/riscv/sys/Makefile.inc | 2 +- lib/libc/riscv/sys/__vdso_gettc.c | 56 +++++++++++++++++++++++++++++++++++++++ sys/riscv/include/vdso.h | 2 ++ sys/riscv/riscv/elf_machdep.c | 4 +-- sys/riscv/riscv/timer.c | 14 ++++++++++ 5 files changed, 75 insertions(+), 3 deletions(-) diff --git a/lib/libc/riscv/sys/Makefile.inc b/lib/libc/riscv/sys/Makefile.inc index 0e94e6652645..b322cece382c 100644 --- a/lib/libc/riscv/sys/Makefile.inc +++ b/lib/libc/riscv/sys/Makefile.inc @@ -1,6 +1,6 @@ # $FreeBSD$ -SRCS+= trivial-vdso_tc.c +SRCS+= __vdso_gettc.c MDASM= cerror.S \ syscall.S \ diff --git a/lib/libc/riscv/sys/__vdso_gettc.c b/lib/libc/riscv/sys/__vdso_gettc.c new file mode 100644 index 000000000000..20e69a791bb5 --- /dev/null +++ b/lib/libc/riscv/sys/__vdso_gettc.c @@ -0,0 +1,56 @@ +/*- + * Copyright (c) 2021 Jessica Clarke + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + */ + +#include <sys/cdefs.h> +__FBSDID("$FreeBSD$"); + +#include <sys/types.h> +#include <sys/elf.h> +#include <sys/time.h> +#include <sys/vdso.h> + +#include <machine/riscvreg.h> + +#include <errno.h> + +#include "libc_private.h" + +#pragma weak __vdso_gettc +int +__vdso_gettc(const struct vdso_timehands *th, u_int *tc) +{ + if (th->th_algo != VDSO_TH_ALGO_RISCV_RDTIME) + return (ENOSYS); + + *tc = csr_read(time); + return (0); +} + +#pragma weak __vdso_gettimekeep +int +__vdso_gettimekeep(struct vdso_timekeep **tk) +{ + return (_elf_aux_info(AT_TIMEKEEP, tk, sizeof(*tk))); +} diff --git a/sys/riscv/include/vdso.h b/sys/riscv/include/vdso.h index 5a8f7f555b50..175c52eedcef 100644 --- a/sys/riscv/include/vdso.h +++ b/sys/riscv/include/vdso.h @@ -31,4 +31,6 @@ #define VDSO_TIMEHANDS_MD \ uint32_t th_res[8]; +#define VDSO_TH_ALGO_RISCV_RDTIME VDSO_TH_ALGO_1 + #endif /* !_MACHINE_VDSO_H_ */ diff --git a/sys/riscv/riscv/elf_machdep.c b/sys/riscv/riscv/elf_machdep.c index cf479ec6d154..5e974aba3701 100644 --- a/sys/riscv/riscv/elf_machdep.c +++ b/sys/riscv/riscv/elf_machdep.c @@ -84,8 +84,8 @@ struct sysentvec elf64_freebsd_sysvec = { .sv_setregs = exec_setregs, .sv_fixlimit = NULL, .sv_maxssiz = NULL, - .sv_flags = SV_ABI_FREEBSD | SV_LP64 | SV_SHP | SV_ASLR | - SV_RNG_SEED_VER, + .sv_flags = SV_ABI_FREEBSD | SV_LP64 | SV_SHP | SV_TIMEKEEP | + SV_ASLR | SV_RNG_SEED_VER, .sv_set_syscall_retval = cpu_set_syscall_retval, .sv_fetch_syscall_args = cpu_fetch_syscall_args, .sv_syscallnames = syscallnames, diff --git a/sys/riscv/riscv/timer.c b/sys/riscv/riscv/timer.c index 845a2fbed2ff..c75350f4aac5 100644 --- a/sys/riscv/riscv/timer.c +++ b/sys/riscv/riscv/timer.c @@ -50,6 +50,7 @@ __FBSDID("$FreeBSD$"); #include <sys/rman.h> #include <sys/timeet.h> #include <sys/timetc.h> +#include <sys/vdso.h> #include <sys/watchdog.h> #include <sys/proc.h> @@ -78,6 +79,9 @@ struct riscv_timer_softc { static struct riscv_timer_softc *riscv_timer_sc = NULL; +static uint32_t riscv_timer_fill_vdso_timehands(struct vdso_timehands *vdso_th, + struct timecounter *tc); + static timecounter_get_t riscv_timer_get_timecount; static struct timecounter riscv_timer_timecount = { @@ -87,6 +91,7 @@ static struct timecounter riscv_timer_timecount = { .tc_counter_mask = ~0u, .tc_frequency = 0, .tc_quality = 1000, + .tc_fill_vdso_timehands = riscv_timer_fill_vdso_timehands, }; static inline uint64_t @@ -301,3 +306,12 @@ DELAY(int usec) } TSEXIT(); } + +static uint32_t +riscv_timer_fill_vdso_timehands(struct vdso_timehands *vdso_th, + struct timecounter *tc) +{ + vdso_th->th_algo = VDSO_TH_ALGO_RISCV_RDTIME; + bzero(vdso_th->th_res, sizeof(vdso_th->th_res)); + return (1); +}
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?202109071209.187C9Uuf086997>