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get_mempolicy(): initial implementation

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This commit is contained in:
Balazs Gerofi
2016-10-14 21:28:00 +09:00
parent 083645f203
commit d2b677b6da
1 changed files with 43 additions and 4 deletions
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47
kernel/syscall.c
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@ -7073,22 +7073,61 @@ out:
return error;
} /* sys_getcpu() */
/* XXX: move this to header.. */
enum {
MPOL_DEFAULT,
MPOL_PREFERRED,
MPOL_BIND,
MPOL_INTERLEAVE,
MPOL_LOCAL,
MPOL_MAX, /* always last member of enum */
};
SYSCALL_DECLARE(mbind)
{
dkprintf("sys_mbind\n");
return -ENOSYS;
} /* sys_mbind() */
SYSCALL_DECLARE(set_mempolicy)
{
dkprintf("sys_set_mempolicy\n");
return -ENOSYS;
} /* sys_set_mempolicy() */
SYSCALL_DECLARE(get_mempolicy)
{
dkprintf("sys_get_mempolicy\n");
return -ENOSYS;
int *mode = (int *)ihk_mc_syscall_arg0(ctx);
unsigned long *nodemask =
(unsigned long *)ihk_mc_syscall_arg1(ctx);
unsigned long maxnode = ihk_mc_syscall_arg2(ctx);
unsigned long addr = ihk_mc_syscall_arg3(ctx);
unsigned long flags = ihk_mc_syscall_arg4(ctx);
int error;
if (flags || addr) {
return -EINVAL;
}
if (mode) {
error = copy_to_user(mode, MPOL_DEFAULT, sizeof(*mode));
if (error) {
error = -EINVAL;
goto out;
}
}
if (nodemask) {
error = copy_to_user(nodemask,
cpu_local_var(current)->vm->numa_mask,
maxnode < (PROCESS_NUMA_MASK_BITS >> 3) ?
maxnode : (PROCESS_NUMA_MASK_BITS >> 3));
if (error) {
error = -EINVAL;
goto out;
}
}
out:
return error;
} /* sys_get_mempolicy() */
SYSCALL_DECLARE(migrate_pages)