mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-19 00:47:22 +07:00
457c899653
Add SPDX license identifiers to all files which: - Have no license information of any form - Have EXPORT_.*_SYMBOL_GPL inside which was used in the initial scan/conversion to ignore the file These files fall under the project license, GPL v2 only. The resulting SPDX license identifier is: GPL-2.0-only Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
65 lines
1.8 KiB
C
65 lines
1.8 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
|
|
/*
|
|
* System call callback functions for SPUs
|
|
*/
|
|
|
|
#undef DEBUG
|
|
|
|
#include <linux/kallsyms.h>
|
|
#include <linux/export.h>
|
|
#include <linux/syscalls.h>
|
|
|
|
#include <asm/spu.h>
|
|
#include <asm/syscalls.h>
|
|
#include <asm/unistd.h>
|
|
|
|
/*
|
|
* This table defines the system calls that an SPU can call.
|
|
* It is currently a subset of the 64 bit powerpc system calls,
|
|
* with the exact semantics.
|
|
*
|
|
* The reasons for disabling some of the system calls are:
|
|
* 1. They interact with the way SPU syscalls are handled
|
|
* and we can't let them execute ever:
|
|
* restart_syscall, exit, for, execve, ptrace, ...
|
|
* 2. They are deprecated and replaced by other means:
|
|
* uselib, pciconfig_*, sysfs, ...
|
|
* 3. They are somewhat interacting with the system in a way
|
|
* we don't want an SPU to:
|
|
* reboot, init_module, mount, kexec_load
|
|
* 4. They are optional and we can't rely on them being
|
|
* linked into the kernel. Unfortunately, the cond_syscall
|
|
* helper does not work here as it does not add the necessary
|
|
* opd symbols:
|
|
* mbind, mq_open, ipc, ...
|
|
*/
|
|
|
|
static void *spu_syscall_table[] = {
|
|
#define __SYSCALL(nr, entry) entry,
|
|
#include <asm/syscall_table_spu.h>
|
|
#undef __SYSCALL
|
|
};
|
|
|
|
long spu_sys_callback(struct spu_syscall_block *s)
|
|
{
|
|
long (*syscall)(u64 a1, u64 a2, u64 a3, u64 a4, u64 a5, u64 a6);
|
|
|
|
if (s->nr_ret >= ARRAY_SIZE(spu_syscall_table)) {
|
|
pr_debug("%s: invalid syscall #%lld", __func__, s->nr_ret);
|
|
return -ENOSYS;
|
|
}
|
|
|
|
syscall = spu_syscall_table[s->nr_ret];
|
|
|
|
pr_debug("SPU-syscall "
|
|
"%pSR:syscall%lld(%llx, %llx, %llx, %llx, %llx, %llx)\n",
|
|
syscall,
|
|
s->nr_ret,
|
|
s->parm[0], s->parm[1], s->parm[2],
|
|
s->parm[3], s->parm[4], s->parm[5]);
|
|
|
|
return syscall(s->parm[0], s->parm[1], s->parm[2],
|
|
s->parm[3], s->parm[4], s->parm[5]);
|
|
}
|
|
EXPORT_SYMBOL_GPL(spu_sys_callback);
|