ping
Also Cc: sta...@vger.kernel.org
On Thu, 2020-10-01 at 19:05 +0200, Joakim Tjernlund wrote:
> Embedded PPC CPU should send SIGBUS to user space when applicable.
>
> Signed-off-by: Joakim Tjernlund <joakim.tjernl...@infinera.com>
> ---
> arch/powerpc/kernel/traps.c | 17 +++++++++++++++++
> 1 file changed, 17 insertions(+)
>
> diff --git a/arch/powerpc/kernel/traps.c b/arch/powerpc/kernel/traps.c
> index 0381242920d9..12715d24141c 100644
> --- a/arch/powerpc/kernel/traps.c
> +++ b/arch/powerpc/kernel/traps.c
> @@ -621,6 +621,11 @@ int machine_check_e500mc(struct pt_regs *regs)
> reason & MCSR_MEA ? "Effective" : "Physical", addr);
> }
>
>
> + if ((user_mode(regs))) {
> + _exception(SIGBUS, regs, reason, regs->nip);
> + recoverable = 1;
> + }
> +
> silent_out:
> mtspr(SPRN_MCSR, mcsr);
> return mfspr(SPRN_MCSR) == 0 && recoverable;
> @@ -665,6 +670,10 @@ int machine_check_e500(struct pt_regs *regs)
> if (reason & MCSR_BUS_RPERR)
> printk("Bus - Read Parity Error\n");
>
>
> + if ((user_mode(regs))) {
> + _exception(SIGBUS, regs, reason, regs->nip);
> + return 1;
> + }
> return 0;
> }
>
>
> @@ -695,6 +704,10 @@ int machine_check_e200(struct pt_regs *regs)
> if (reason & MCSR_BUS_WRERR)
> printk("Bus - Write Bus Error on buffered store or cache line
> push\n");
>
>
> + if ((user_mode(regs))) {
> + _exception(SIGBUS, regs, reason, regs->nip);
> + return 1;
> + }
> return 0;
> }
> #elif defined(CONFIG_PPC32)
> @@ -731,6 +744,10 @@ int machine_check_generic(struct pt_regs *regs)
> default:
> printk("Unknown values in msr\n");
> }
> + if ((user_mode(regs))) {
> + _exception(SIGBUS, regs, reason, regs->nip);
> + return 1;
> + }
> return 0;
> }
> #endif /* everything else */
