Date: Sat, 2 Jan 2021 17:07:02 -0800 From: Mark Millard <marklmi@yahoo.com> To: Brandon Bergren <bdragon@FreeBSD.org> Cc: Justin Hibbits <chmeeedalf@gmail.com>, FreeBSD PowerPC ML <freebsd-ppc@freebsd.org> Subject: Re: CURRENT -r361544 breaks 2-socket PowerMac G4 booting: "powerpc/mmu: Convert PowerPC pmap drivers to ifunc from kobj" Message-ID: <BC4BA6D0-FB25-40E5-AF86-938A8B10BC78@yahoo.com> In-Reply-To: <F6B1536C-51D8-4ABD-BCA8-A045C7E7E2E6@yahoo.com> References: <00423D88-0367-4220-B20A-50307DA72A81@yahoo.com> <A9CDA051-466A-4FC6-A57A-D9D751E4FD00@yahoo.com> <c9ce1ac1-28dc-42af-8fd8-b0714475be6b@www.fastmail.com> <F6B1536C-51D8-4ABD-BCA8-A045C7E7E2E6@yahoo.com>
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On 2021-Jan-2, at 11:38, Mark Millard <marklmi at yahoo.com> wrote:
> On 2021-Jan-2, at 09:54, Brandon Bergren <bdragon at FreeBSD.org> =
wrote:
>=20
>> I was testing this myself yesterday.
>>=20
>> Things seemed to be working (other than usb weirdness) on my MPC7400 =
rev 2.9 dual processor G4 (PVR 000c0209) with latest.
>=20
> On the USB oddities: I've had a boot in which USB is working,
> at least for keyboard use. Its bus_dmamem_alloc messages also
> stop early on, with the 12th message being the last. The last
> 3 are shown in context below (showing the phys addr and
> alignment figures as well):
>=20
> . . .
> Root mount waiting for: CAM usbus0
> Jan 1 17:49:08 FBSDG4S2 kernel: bus_dmamem_alloc failed to align =
memory properly.
> Jan 1 17:49:08 FBSDG4S2 kernel: vtophys(*vaddr)=3D=3D0x1c48d80 and =
dmat->alignment-1=3D=3D0xff
> Jan 1 17:49:08 FBSDG4S2 kernel: ugen0.4: <Mitsumi Electric Apple =
Extended USB Keyboard> at usbus0
> Jan 1 17:49:08 FBSDG4S2 kernel: ukbd0 numa-domain 0 on uhub5
> Jan 1 17:49:08 FBSDG4S2 kernel: ukbd0: <Mitsumi Electric Apple =
Extended USB Keyboard, class 0/0, rev 1.10/1.22, addr 4> on usbus0
> Jan 1 17:49:08 FBSDG4S2 kernel: kbd1 at ukbd0
> Jan 1 17:49:08 FBSDG4S2 kernel: uhid0 numa-domain 0 on uhub5
> Jan 1 17:49:08 FBSDG4S2 kernel: uhid0: <Mitsumi Electric Apple =
Extended USB Keyboard, class 0/0, rev 1.10/1.22, addr 4> on usbus0
> Jan 1 17:49:08 FBSDG4S2 kernel: bus_dmamem_alloc failed to align =
memory properly.
> Jan 1 17:49:08 FBSDG4S2 kernel: vtophys(*vaddr)=3D=3D0x1c48a80 and =
dmat->alignment-1=3D=3D0xff
> Jan 1 17:49:08 FBSDG4S2 kernel: bus_dmamem_alloc failed to align =
memory properly.
> Jan 1 17:49:08 FBSDG4S2 kernel: vtophys(*vaddr)=3D=3D0x1c48a80 and =
dmat->alignment-1=3D=3D0xff
> Jan 1 17:49:08 FBSDG4S2 kernel: Root mount waiting for: CAM usbus0
> Jan 1 17:49:08 FBSDG4S2 kernel: ugen0.5: <vendor 0x05ac Studio =
Display> at usbus0
> Jan 1 17:49:08 FBSDG4S2 kernel: uhid1 numa-domain 0 on uhub4
> Jan 1 17:49:08 FBSDG4S2 kernel: uhid1: <vendor 0x05ac Studio Display, =
class 0/0, rev 1.00/1.06, addr 5> on usbus0
> Jan 1 17:49:08 FBSDG4S2 kernel: Root mount waiting for: CAM
> . . .
>=20
> Apparently, having ongoing bus_dmamem_alloc messages and having
> failing USB are tied together in some manor. For reference,
> the boot did get:
>=20
> Jan 1 17:49:08 FBSDG4S2 kernel: SMP: 2 CPUs found; 2 CPUs usable; 1 =
CPUs woken
>=20
> The PowerMac G4 is instead reporting something different
> for ongoing notices:
>=20
> . . .
> Jan 2 10:10:37 FBSDG4S2 kernel: ds17750: iicbus read failed
> Jan 2 10:12:19 FBSDG4S2 kernel: iichb0: I2C error
> Jan 2 10:14:02 FBSDG4S2 syslogd: last message repeated 1 times
> Jan 2 10:15:44 FBSDG4S2 syslogd: last message repeated 1 times
> Jan 2 10:22:31 FBSDG4S2 syslogd: last message repeated 4 times
> Jan 2 10:22:31 FBSDG4S2 kernel: ds17750: iicbus read failed
> Jan 2 10:24:14 FBSDG4S2 kernel: iichb0: I2C error
> Jan 2 10:25:57 FBSDG4S2 syslogd: last message repeated 1 times
> Jan 2 10:27:39 FBSDG4S2 syslogd: last message repeated 1 times
> Jan 2 10:32:44 FBSDG4S2 syslogd: last message repeated 3 times
> Jan 2 10:32:44 FBSDG4S2 kernel: adm10300: iicbus write failed
> Jan 2 10:34:27 FBSDG4S2 kernel: iichb0: I2C error
> Jan 2 10:36:09 FBSDG4S2 syslogd: last message repeated 1 times
> Jan 2 10:37:52 FBSDG4S2 syslogd: last message repeated 1 times
> Jan 2 10:42:57 FBSDG4S2 syslogd: last message repeated 3 times
> Jan 2 10:42:57 FBSDG4S2 kernel: ds17750: iicbus read failed
> Jan 2 10:44:39 FBSDG4S2 kernel: iichb0: I2C error
> Jan 2 10:46:22 FBSDG4S2 syslogd: last message repeated 1 times
> Jan 2 10:48:02 FBSDG4S2 syslogd: last message repeated 1 times
> Jan 2 10:53:09 FBSDG4S2 syslogd: last message repeated 3 times
> Jan 2 10:53:09 FBSDG4S2 kernel: adm10300: iicbus write failed
> Jan 2 10:54:52 FBSDG4S2 kernel: iichb0: I2C error
> . . .
>=20
> It was not reporting such previously. (It is my build of
> -r368820 with my patches, which had USB failing like
> the artifact.ci kernels in previous boots.)
Just FYI:
This boot with USB working eventually crashed while the system
was basically idle:
. . .
panic: vm_fault_lookup: fault on nofault entry, addr: 0xd77de000
cpuid =3D 0
time =3D 1609626759
KDB: stack backtrace:
0xd690f570: at kdb_backtrace+0x64
0xd690f5d0: at vpanic+0x204
0xd690f640: at panic+0x64
0xd690f680: at vm_fault+0x1b28
0xd690f750: at vm_fault_trap+0xc8
0xd690f780: at trap_pfault+0x124
0xd690f7c0: at trap+0x20c
0xd690f870: at powerpc_interrupt+0x1f8
0xd690f8a0: kernel DSI read trap @ 0xd77de000 by kiic_intr+0x1b8: =
srr1=3D0x9032
r1=3D0xd690f960 cr=3D0x42200800 xer=3D0 ctr=3D0x9ba564 =
sr=3D0x40000000 frame=3D0xd690f8a8
0xd690f960: at 0x198239c
0xd690f990: at ithread_loop+0x314
0xd690fa10: at fork_exit+0xcc
0xd690fa40: at fork_trampoline+0xc
KDB: enter: panic
The reboot was back to USB not working.
>> Can you tell me the exact PVR of your processors? (can find it in OF =
with 'dev /cpus/PowerPC,G4@0 .properties' and looking at the =
cpu-version: property.) I'm wondering if it is an errata that we're =
tripping over here.
>=20
> This from ofwdump covers that for the PowerPC 7455 revision 3.3,
> I think:
>=20
> # ofwdump -P cpu-version /cpus/PowerPC,G4
> Node 0x274: PowerPC,G4
> cpu-version:
> 80 01 03 03=20
>=20
> FYI:
>=20
> # ofwdump -ap
> Node 0x38: device-tree
> phandle:
> ff 88 11 a8=20
> model:
> 50 6f 77 65 72 4d 61 63 33 2c 36 00=20
> 'PowerMac3,6'
> . . .
>=20
> Also:
>=20
> Jan 1 17:49:08 FBSDG4S2 kernel: cpu0: Motorola PowerPC 7455 revision =
3.3, 1416.74 MHz
> Jan 1 17:49:08 FBSDG4S2 kernel: cpu0: Features =
9c000000<PPC32,ALTIVEC,FPU,MMU>
> Jan 1 17:49:08 FBSDG4S2 kernel: cpu0: HID0 =
8450c0bc<EMCP,TBEN,NAP,DPM,ICE,DCE,SGE,BTIC,LRSTK,FOLD,BHT>
> Jan 1 17:49:08 FBSDG4S2 kernel: real memory =3D 2115649536 (2017 MB)
> Jan 1 17:49:08 FBSDG4S2 kernel: avail memory =3D 2052780032 (1957 MB)
>=20
> NOTE: I have access to a 2nd one of this type of
> PowerMac G4.
>=20
>> Regarding the alignment problem, I'm hoping to be able to update the =
busdma code to lean on the new MI bits, it's a bit of a mess currently.
>=20
> It looks to me like this and the USB/I2C problems may be related
> in some way.
>=20
>> On Thu, Dec 31, 2020, at 3:35 PM, Mark Millard wrote:
>>> [Continuation of testing kernel builds, but testing my own kernel
>>> builds for the head powerpc updates not available from artifacts.ci.
>>> Ends up: -r361544 breaks things.]
>>>=20
>>> On 2020-Dec-30, at 17:07, Mark Millard <marklmi at yahoo.com> wrote:
>>>=20
>>>> A quick summary of what I found in a crude artifact bisect is coded =
into
>>>> the filenames listed later. The earliest major point is the "1 CPUs =
woken"
>>>> issue from what I can tell. It still happens in -r368820 .
>>>>=20
>>>> "2cpus_booted" means things booted and worked normally.
>>>>=20
>>>> "1cpuwoke_" means that the following was reported:
>>>>=20
>>>> SMP: 2 CPUs found; 2 CPUs usable; 1 CPUs woken
>>>>=20
>>>> "_hung" means that it appeared to stop without reporting a crash. =
Never
>>>> got to login prompt.
>>>>=20
>>>> "crashes_quickly" means that the the kernel did not get very far =
before
>>>> the crash happened.
>>>>=20
>>>> -rw-r--r-- 1 root wheel 19179328 May 25 21:44:01 2020 =
kernel-r361494-2cpus_booted.txz
>>>>=20
>>>> Note: No artifact kernel.txz files for the range -r361495 .. =
-r361583 .
>>>> powerpc checkins in that range include:
>>>>=20
>>>> -r361542 : [PowerPC] Fix invalid asm in trap code (Brandon)
>>>> -r361544 : powerpc/mmu: Convert PowerPC pmap drivers to ifunc from =
kobj (Justin)
>>>> -r361545 : Properly sort ifdef archs in vm_fault_soft_fast =
superpage guards. (Justin)
>>>> -r361568 : [PowerPC] Fix radix crash when passing -1 from userspace =
(Brandon)
>>>> -r361570 : powerpc/pmap: Remove some debug from r361544 (Justin)
>>>>=20
>>>> -rw-r--r-- 1 root wheel 19133836 May 28 04:28:01 2020 =
kernel-r361584-1cpuwoke_hung.txz
>>>> -rw-r--r-- 1 root wheel 19181596 May 29 04:42:42 2020 =
kernel-r361624-1cpuwoke_hung.txz
>>>> -rw-r--r-- 1 root wheel 19254832 Jun 3 10:26:42 2020 =
kernel-r361754-1cpuwoke_hung.txz
>>>> -rw-r--r-- 1 root wheel 18869112 Jun 10 16:53:57 2020 =
kernel-r362034-1cpuwoke_hung.txz
>>>> -rw-r--r-- 1 root wheel 19245524 Jul 8 06:04:41 2020 =
kernel-r363008-1cpuwoke_hung.txz
>>>> -rw-r--r-- 1 root wheel 19259816 Aug 16 12:03:55 2020 =
kernel-r364274-1cpuwoke_hung.txz
>>>>=20
>>>> NOTE: -r364284 is where clang 11 started and the -O newly meaning =
-O1 problem started.
>>>> (Previously -O meant -O2. -O1 messed up the kernel's ifunc =
handling until it
>>>> was changed to explicitly use -O2.)
>>>>=20
>>>> -rw-r--r-- 1 root wheel 19369960 Aug 22 11:38:22 2020 =
kernel-r364488-crashes_quickly.txz
>>>> -rw-r--r-- 1 root wheel 19203632 Sep 1 01:38:18 2020 =
kernel-r365024-crashes_quickly.txz
>>>> -rw-r--r-- 1 root wheel 19367776 Sep 3 11:02:58 2020 =
kernel-r365304-crashes_quickly.txz
>>>> -rw-r--r-- 1 root wheel 19279564 Sep 6 08:06:11 2020 =
kernel-r365378-crashes_quickly.txz
>>>> -rw-r--r-- 1 root wheel 19205456 Sep 7 22:53:14 2020 =
kernel-r365444-1cpuwoke_crashes_late.txz
>>>> -rw-r--r-- 1 root wheel 19446448 Sep 10 08:08:23 2020 =
kernel-r365578-1cpuwoke_hung.txz
>>>> -rw-r--r-- 1 root wheel 19398268 Oct 9 06:05:48 2020 =
kernel-r366598-1cpuwoke_hung.txz
>>>>=20
>>>> Note: -r368820 still has "1cpuwoke" status and its USB is messed up =
(and
>>>> it reports DMA misalignment) but it does boot. (I accessed it =
via ssh.)
>>>=20
>>> Note: for the below kernel builds I provided a "int yydebug;" for:
>>>=20
>>> usr.bin/localedef/localedef.c
>>>=20
>>> so kernel-toolchain could build (avoiding a link failure).
>>>=20
>>> Other than that, the kernel builds are of pure code from git using=20=
>>> KERNCONF=3DGENERIC ,
>>> TARGET=3Dpowerpc , TARGET_ARCH=3Dpowerpc and no other tailoring, =
avoiding=20
>>> any questions
>>> about my personal patches contributing.
>>>=20
>>>=20
>>> -r361542 (64cc3b0c28b9) : [PowerPC] Fix invalid asm in trap code =
(Brandon)
>>>=20
>>> Things booted and worked as expected.
>>>=20
>>>=20
>>> -r361544 (45b69dd63e84) : powerpc/mmu: Convert PowerPC pmap drivers =
to=20
>>> ifunc from kobj (Justin)
>>>=20
>>> SMP: 2 CPUs found; 2 CPUs usable; 1 CPUs woken
>>>=20
>>> was reported and it appeared to stop without reporting a crash. =
Never
>>> got to login prompt.
>>>=20
>>>=20
>>> NOTE: -r361453 was on stable/ instead of head/ so the above is a
>>> works-then-fails pair with nothing between on CURRENT.
>>=20
>>=20
>=20
=3D=3D=3D
Mark Millard
marklmi at yahoo.com
( dsl-only.net went
away in early 2018-Mar)
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