diff options
Diffstat (limited to 'kernel/sys.c')
| -rw-r--r-- | kernel/sys.c | 29 |
1 files changed, 27 insertions, 2 deletions
diff --git a/kernel/sys.c b/kernel/sys.c index f8e543f1e38a..3a2df1bd9f64 100644 --- a/kernel/sys.c +++ b/kernel/sys.c @@ -146,6 +146,15 @@ #ifndef RISCV_V_GET_CONTROL # define RISCV_V_GET_CONTROL() (-EINVAL) #endif +#ifndef RISCV_SET_ICACHE_FLUSH_CTX +# define RISCV_SET_ICACHE_FLUSH_CTX(a, b) (-EINVAL) +#endif +#ifndef PPC_GET_DEXCR_ASPECT +# define PPC_GET_DEXCR_ASPECT(a, b) (-EINVAL) +#endif +#ifndef PPC_SET_DEXCR_ASPECT +# define PPC_SET_DEXCR_ASPECT(a, b, c) (-EINVAL) +#endif /* * this is where the system-wide overflow UID and GID are defined, for @@ -2408,8 +2417,11 @@ static inline int prctl_set_mdwe(unsigned long bits, unsigned long arg3, if (bits & PR_MDWE_NO_INHERIT && !(bits & PR_MDWE_REFUSE_EXEC_GAIN)) return -EINVAL; - /* PARISC cannot allow mdwe as it needs writable stacks */ - if (IS_ENABLED(CONFIG_PARISC)) + /* + * EOPNOTSUPP might be more appropriate here in principle, but + * existing userspace depends on EINVAL specifically. + */ + if (!arch_memory_deny_write_exec_supported()) return -EINVAL; current_bits = get_current_mdwe(); @@ -2723,6 +2735,16 @@ SYSCALL_DEFINE5(prctl, int, option, unsigned long, arg2, unsigned long, arg3, case PR_GET_MDWE: error = prctl_get_mdwe(arg2, arg3, arg4, arg5); break; + case PR_PPC_GET_DEXCR: + if (arg3 || arg4 || arg5) + return -EINVAL; + error = PPC_GET_DEXCR_ASPECT(me, arg2); + break; + case PR_PPC_SET_DEXCR: + if (arg4 || arg5) + return -EINVAL; + error = PPC_SET_DEXCR_ASPECT(me, arg2, arg3); + break; case PR_SET_VMA: error = prctl_set_vma(arg2, arg3, arg4, arg5); break; @@ -2757,6 +2779,9 @@ SYSCALL_DEFINE5(prctl, int, option, unsigned long, arg2, unsigned long, arg3, case PR_RISCV_V_GET_CONTROL: error = RISCV_V_GET_CONTROL(); break; + case PR_RISCV_SET_ICACHE_FLUSH_CTX: + error = RISCV_SET_ICACHE_FLUSH_CTX(arg2, arg3); + break; default: error = -EINVAL; break; |