Contributors: 12
| Author |
Tokens |
Token Proportion |
Commits |
Commit Proportion |
| Arnd Bergmann |
173 |
81.99% |
1 |
8.33% |
| Masahiro Yamada |
11 |
5.21% |
1 |
8.33% |
| Andreas Schwab |
8 |
3.79% |
1 |
8.33% |
| Rohan McLure |
5 |
2.37% |
1 |
8.33% |
| Firoz Khan |
4 |
1.90% |
1 |
8.33% |
| Joe Perches |
3 |
1.42% |
1 |
8.33% |
| Jeremy Kerr |
2 |
0.95% |
1 |
8.33% |
| Sebastian Andrzej Siewior |
1 |
0.47% |
1 |
8.33% |
| Thomas Gleixner |
1 |
0.47% |
1 |
8.33% |
| Ingo Molnar |
1 |
0.47% |
1 |
8.33% |
| Paul Gortmaker |
1 |
0.47% |
1 |
8.33% |
| Harvey Harrison |
1 |
0.47% |
1 |
8.33% |
| Total |
211 |
|
12 |
|
// 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 const syscall_fn spu_syscall_table[] = {
#define __SYSCALL_WITH_COMPAT(nr, entry, compat) __SYSCALL(nr, entry)
#define __SYSCALL(nr, entry) [nr] = (void *) entry,
#include <asm/syscall_table_spu.h>
};
long spu_sys_callback(struct spu_syscall_block *s)
{
syscall_fn syscall;
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);