On Wed, Jun 1, 2022 at 7:52 AM WANG Xuerui <kernel@xxxxxxxxxx> wrote:
On 6/1/22 00:01, Huacai Chen wrote:
https://git.kernel.org/pub/scm/linux/kernel/git/chenhuacai/linux-loongson.git/log/?h=loongarch-next
has been updated. Now this branch droped irqchip drivers and pci
drivers. But the existing irqchip drivers need some small adjustment
to avoid build errors [1], and I hope Marc can give an Acked-by.
Thanks.
This branch can be built with defconfig and allmodconfig (except
drivers/platform/surface/aggregator/controller.c, because it requires
8bit/16bit cmpxchg, which I was told to remove their support).
[1] https://lore.kernel.org/lkml/e7cf33a170d0b4e98e53744f60dbf922@xxxxxxxxxx/T/#t
I see the loongarch-next HEAD has been updated and it's now purely arch
changes aside from the two trivial irqchip cleanups. Some other changes
to the v11 patchset [1] are included, but arguably minor enough to not
invalidate previous Reviewed-by tags.
Very nice! I don't see exactly how the previous build bugs were addressed,
but I can confirm that this version builds. Regarding the two irqchip patches,
621e7015b529 ("irqchip/loongson-liointc: Fix build error for LoongArch") is
a good way to work around the mips oddity, and I have no problem taking
that through the asm-generic tree. The other one, f54b4a166023 ("irqchip:
Adjust Kconfig for Loongson"), looks mostly unnecessary, and I think only
the LOONGSON_HTPIC change should be included here, while I would
leave out the COMPILE_TEST changes and instead have the driver
changes take care of making it possible to keep building it on x86, possibly
doing
depends on MACH_LOONGSON64 || (COMPILE_TEST && ACPI)
in the future, after the loongarch64 ACPI support is merged.
After some small tweaks:
- adding "#include <asm/irqflags.h>" to arch/loongarch/include/asm/ptrace.h,
- adding an arch/loongarch/include/uapi/asm/bpf_perf_event.h with the
same content as arch/arm64's, and
- adding "depends on ARM64 || X86" to
drivers/platform/surface/aggregator/Kconfig,
the current loongarch-next HEAD (commit
36552a24f70d21b7d63d9ef490561dbdc13798d7) now passes allmodconfig build
(with CONFIG_WERROR disabled; my Gentoo-flavored gcc-12 seems to emit
warnings on a few drivers).
The only one of these issues that I see is the surface aggregator one.
I think we can address all three as follow-up fixes after -rc1 if the port
gets merged and these are still required.
The majority of userspace ABI has been stable for a few months already,
after the addition of orig_a0 and removal of newfstatat; the necessary
changes to switch to statx are already reviewed [2] / merged [3], and
have been integrated into the LoongArch port of Gentoo for a while. Eric
looked at the v11 and gave comments, and changes were made according to
the suggestions, but it'd probably better to get a proper Reviewed-by.
Right.
Among the rest of patches, I think maybe the EFI/boot protocol part
still need approval/ack from the EFI maintainer. However because the
current port isn't going to be able to run on any real hardware, maybe
that part could be done later; I'm not sure if the unacknowledged EFI
bits should be removed as well.
Ard, do you have any last comments on this?
