46 lines
1.9 KiB
C
46 lines
1.9 KiB
C
/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
|
|
/*
|
|
* Copyright (C) 2018 David Abdurachmanov <david.abdurachmanov@gmail.com>
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License version 2 as
|
|
* published by the Free Software Foundation.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program. If not, see <https://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
#if defined(__LP64__) && !defined(__SYSCALL_COMPAT)
|
|
#define __ARCH_WANT_NEW_STAT
|
|
#define __ARCH_WANT_SET_GET_RLIMIT
|
|
#endif /* __LP64__ */
|
|
|
|
#define __ARCH_WANT_SYS_CLONE3
|
|
#define __ARCH_WANT_MEMFD_SECRET
|
|
|
|
#include <asm-generic/unistd.h>
|
|
|
|
/*
|
|
* Allows the instruction cache to be flushed from userspace. Despite RISC-V
|
|
* having a direct 'fence.i' instruction available to userspace (which we
|
|
* can't trap!), that's not actually viable when running on Linux because the
|
|
* kernel might schedule a process on another hart. There is no way for
|
|
* userspace to handle this without invoking the kernel (as it doesn't know the
|
|
* thread->hart mappings), so we've defined a RISC-V specific system call to
|
|
* flush the instruction cache.
|
|
*
|
|
* __NR_riscv_flush_icache is defined to flush the instruction cache over an
|
|
* address range, with the flush applying to either all threads or just the
|
|
* caller. We don't currently do anything with the address range, that's just
|
|
* in there for forwards compatibility.
|
|
*/
|
|
#ifndef __NR_riscv_flush_icache
|
|
#define __NR_riscv_flush_icache (__NR_arch_specific_syscall + 15)
|
|
#endif
|
|
__SYSCALL(__NR_riscv_flush_icache, sys_riscv_flush_icache)
|