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/* 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) /* * Allows userspace to query the kernel for CPU architecture and * microarchitecture details across a given set of CPUs. */ #ifndef __NR_riscv_hwprobe #define __NR_riscv_hwprobe (__NR_arch_specific_syscall + 14) #endif __SYSCALL(__NR_riscv_hwprobe, sys_riscv_hwprobe)