On Thu, Sep 5, 2024 at 5:16 PM Thomas Weißschuh <tho...@t-8ch.de> wrote: > > On 2024-09-05 17:07:22+0000, Jason A. Donenfeld wrote: > > On Thu, Sep 5, 2024 at 5:05 PM Thomas Weißschuh <tho...@t-8ch.de> wrote: > > > > > > On 2024-09-05 16:53:55+0000, Jason A. Donenfeld wrote: > > > > On Thu, Sep 05, 2024 at 07:25:05AM +0200, Thomas Weißschuh wrote: > > > > > On 2024-09-05 06:04:12+0000, Jason A. Donenfeld wrote: > > > > > > On Thu, Sep 5, 2024 at 5:45 AM maobibo <maob...@loongson.cn> wrote: > > > > > > > > > > > > > > Jason, > > > > > > > > > > > > > > With the latest qemu 9.1 version, elf format booting is supported. > > > > > > > > > > > > Thanks, I just figured this out too, about 4 minutes ago. Excellent. > > > > > > And the 1G minimum ram limit is gone too. > > > > > > > > > > > > Now working on how to trigger resets. > > > > > > > > > > With "reset" do you mean normal (non-panic) system shutdown/poweroff? > > > > > Since QEMU 9.1 and a recent kernel you can use the pvpanic device for > > > > > that in a cross-architecture way. > > > > > > > > What I mean is that I need for userspace calling `reboot(RB_AUTOBOOT);` > > > > to actually result in QEMU being told to reboot the system. Sounds like > > > > that's not possible (yet?) in 9.1? > > > > > > With reboot(RB_POWER_OFF) this is indeed the exact usecase for pvpanic > > > > I'm actually using reboot(RB_AUTOBOOT) wth QEMU's -no-reboot, because > > that tends to be far more compatible with a greater number of > > platforms, for example, x86 without acpi. Shucks. > > You can check that both QEMU and the kernel support pvpanic shutdown > through sysfs and if so use reboot(RB_POWER_OFF); and > reboot(RB_AUTOBOOT) otherwise.
I guess. But the whole idea is to bloat the code as little as possible and use one interface for everything. Pushing that all up into userspace is pretty icky. It sounds like LoongArch already supports this via ACPI GED, but there's some plumbing that needs to be done still. So maybe I'll just wait for that. Meanwhile, any idea about adding a second serial to the platform? I've been futzing with it for a bit now to no avail. Jason
