On Mon, May 08, 2017 at 09:21:40AM -0500, Eric Blake wrote:
> On 05/07/2017 06:35 AM, Krzysztof Kozlowski wrote:
> > On all Exynos-based boards, the system powers down itself by driving
> > PS_HOLD signal low. Handle writing to respective PMU register to fix
> > power off failure:
> >
> > reboot: Power down
> > Unable to poweroff system
> > shutdown: 31 output lines suppressed due to ratelimiting
> > Kernel panic - not syncing: Attempted to kill init! exitcode=0x00000000
> >
> > CPU: 0 PID: 1 Comm: shutdown Not tainted 4.11.0-rc8 #846
> > Hardware name: SAMSUNG EXYNOS (Flattened Device Tree)
> > [<c031050c>] (unwind_backtrace) from [<c030ba6c>] (show_stack+0x10/0x14)
> > [<c030ba6c>] (show_stack) from [<c05b2800>] (dump_stack+0x88/0x9c)
> > [<c05b2800>] (dump_stack) from [<c03d3140>] (panic+0xdc/0x268)
> > [<c03d3140>] (panic) from [<c0343614>] (do_exit+0xa90/0xab4)
> > [<c0343614>] (do_exit) from [<c035f2dc>] (SyS_reboot+0x164/0x1d0)
> > [<c035f2dc>] (SyS_reboot) from [<c0307c80>] (ret_fast_syscall+0x0/0x3c)
> >
> > Signed-off-by: Krzysztof Kozlowski <k...@kernel.org>
> > ---
> > hw/misc/exynos4210_pmu.c | 14 ++++++++++++++
> > 1 file changed, 14 insertions(+)
>
> > @@ -397,6 +398,12 @@ typedef struct Exynos4210PmuState {
> > uint32_t reg[PMU_NUM_OF_REGISTERS];
> > } Exynos4210PmuState;
> >
> > +static void exynos4210_pmu_poweroff(void)
> > +{
> > + PRINT_DEBUG("QEMU PMU: PS_HOLD bit down, powering off\n");
> > + qemu_system_shutdown_request();
>
> Depending on whether your patch lands before or after mine, we'll have
> to update this. It sounds like it is a guest-triggered reset, so my
> patch would have this use SHUTDOWN_CAUSE_GUEST_SHUTDOWN.
>
> https://lists.gnu.org/archive/html/qemu-devel/2017-05/msg01380.html
Sure, I can rebase and fix the difference once your patchset gets in.
Best regards,
Krzysztof
