Messages in this thread | | | Date | Sat, 23 Apr 2022 19:09:01 -0700 | Subject | Re: [PATCH v2 00/48] ARM: PXA multiplatform support | From | Guenter Roeck <> |
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On 4/23/22 12:55, Arnd Bergmann wrote: > On Sat, Apr 23, 2022 at 1:41 AM Guenter Roeck <linux@roeck-us.net> wrote: >> >> On Sat, Apr 23, 2022 at 12:04:31AM +0200, Arnd Bergmann wrote: >>> On Fri, Apr 22, 2022 at 10:55 PM Guenter Roeck <linux@roeck-us.net> wrote: >>>> On 4/22/22 12:16, Arnd Bergmann wrote: >>>>> On Fri, Apr 22, 2022 at 7:05 PM Guenter Roeck <linux@roeck-us.net> wrote: >>>>> >>>>> Which machine did you hit this on? Is this on hardware or in qemu? >>>>> >>>> qemu, as always. borzoi, spitz, terrier, tosa, z2, and sx1 fail. >>>> Also, I just noticed that the failure is not always the same. >>>> z2 fails to boot from initrd, and sx1 fails to boot completely. >>> >>> That's a lot of machines failing, I hope at least we got the same bugs more >>> than once here. >>> >>> For the I/O space, I found now that PXA was not using the standard >>> virtual I/O address yet, but instead used a NULL-based offset. >>> >>> I'm not entirely happy with this patch, but this is an outline of what >>> I think we need to fix that: https://pastebin.com/3nVgQsEw >>> This one is probably incomplete, at least it breaks sa1100 for now, >>> and it adds a bogus CONFIG_PCI dependency. I'm also not sure >>> in what way the last patch in the series triggers it, rather than the >>> one that removed mach/io.h. >>> >>> I had sx1 booting in qemu at least, with the omap1 multiplatform series only. >>> If you have a custom config for this one, make sure you get the right >>> DEBUG_LL address. >>> >>>> I'll do another round of bisects. >>> >> >> Here is the bisect for the sx1 boot failure. > > Odd, I can't reproduce this at all. Do you get any console output at > all for this? > > Is this the plain omap1_defconfig, or something else? >
No, it is my own sx1 specific configuration.
https://github.com/groeck/linux-build-test/blob/master/rootfs/arm/qemu_sx1_defconfig
I don't recall where I got it from but ...
> One thing I keep having to apply myself is this snippet: > > diff --git a/arch/arm/mm/proc-arm925.S b/arch/arm/mm/proc-arm925.S > index 0bfad62ea858..87c695703580 100644 > --- a/arch/arm/mm/proc-arm925.S > +++ b/arch/arm/mm/proc-arm925.S > @@ -441,7 +441,6 @@ __arm925_setup: > > #ifdef CONFIG_CPU_DCACHE_WRITETHROUGH > mov r0, #4 @ disable write-back > on caches explicitly > - mcr p15, 7, r0, c15, c0, 0 > #endif
it does not have CONFIG_CPU_DCACHE_WRITETHROUGH enabled.
Guenter
> > adr r5, arm925_crval > > I don't remember what the story is behind this, but I can't actually manage > to boot omap1_defconfig on qemu with the instruction intact. > > Arnd
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