From: Ma Wupeng <mawupeng1@huawei.com> hulk inclusion category: feature bugzilla: https://atomgit.com/openeuler/kernel/issues/9826 -------------------------------- Introduce prctl to control pbha behavior. Signed-off-by: Ma Wupeng <mawupeng1@huawei.com> Signed-off-by: Fanhua Li <lifanhua5@huawei.com> Signed-off-by: Jiacheng Yu <yujiacheng3@huawei.com> --- include/uapi/linux/prctl.h | 1 + kernel/sys.c | 10 ++++++++++ 2 files changed, 11 insertions(+) diff --git a/include/uapi/linux/prctl.h b/include/uapi/linux/prctl.h index 370ed14b1ae0..02229dfc21d0 100644 --- a/include/uapi/linux/prctl.h +++ b/include/uapi/linux/prctl.h @@ -306,4 +306,5 @@ struct prctl_mm_map { # define PR_RISCV_V_VSTATE_CTRL_NEXT_MASK 0xc # define PR_RISCV_V_VSTATE_CTRL_MASK 0x1f +#define PR_UPDATE_PBHA_BIT0 0x82312f0 #endif /* _LINUX_PRCTL_H */ diff --git a/kernel/sys.c b/kernel/sys.c index 7465bb7c8919..9ef86e9faa35 100644 --- a/kernel/sys.c +++ b/kernel/sys.c @@ -2767,6 +2767,16 @@ SYSCALL_DEFINE5(prctl, int, option, unsigned long, arg2, unsigned long, arg3, case PR_RISCV_V_GET_CONTROL: error = RISCV_V_GET_CONTROL(); break; +#ifdef CONFIG_ARM64_PBHA + case PR_UPDATE_PBHA_BIT0: + if (arg3 || arg4 || arg5) + return -EINVAL; + if (arg2 != 0 && arg2 != 1) + return -EINVAL; + + error = pbha_bit0_update_vma(me->mm, arg2); + break; +#endif default: error = -EINVAL; break;