On Fri, Jan 25, 2019 at 02:56:30PM +0000, Alexandru Elisei wrote:
>
> On 1/24/19 1:35 PM, Andrew Jones wrote:
> > On Thu, Jan 24, 2019 at 02:00:20PM +0100, Andrew Jones wrote:
> >> [..]
> >> chr_testdev_init() ensures vcon is NULL if it fails to initialize.
> >> chr_testdev_exit() immediately returns if vcon is NULL. This was
> >> done by design to allow fallback exits to be placed below the
> >> chr_testdev_exit call, e.g. halt().
> >>
> >> We should be able to drop patch 3/7 and change exit() to this
> >>
> >> void exit(int code)
> >> {
> >> chr_testdev_exit(code);
> >> psci_system_off();
> >> halt(code);
> >> __builtin_unreachable();
> >> }
> >>
> > There's also a framework for exits that can't return status codes. powerpc
> > uses it. Before exiting with psci_system_off we need to make this print
> > statement
> >
> > printf("\nEXIT: STATUS=%d\n", ((code) << 1) | 1);
> >
> > And run_qemu in arm/run needs to be changed to run_qemu_status. It's
> > hacky, but maybe we can live with it until kvmtool offers some sort of
> > debug exit.
> >
> > Thanks,
> > drew
>
> I can make the change, but if I understand the scripts/arch-run.bash code
> correctly, run_qemu() will check if QEMU was terminated because of a signal and
> adjust the return code to take that into account. Using run_qemu_status() means
> that check won't be made when the tests are run under QEMU, is that acceptable?
>
run_qemu_status() first calls run_qemu(). If the return value from
run_qemu() is 1, then it'll change the value to whatever the EXIT:
status line says it should be. If run_qemu() detected that a signal
caused the exit, then the return value won't be 1. In that case
run_qemu_status() will simply propagate the value to the caller.
It might be worth doing a few tests to ensure that all works out as
designed, but I'm pretty sure it should.
Thanks,
drew
_______________________________________________
kvmarm mailing list
kvmarm@xxxxxxxxxxxxxxxxxxxxx
https://lists.cs.columbia.edu/mailman/listinfo/kvmarm
