Hi Max,
On 10/6/19 9:04 PM, Max Filippov wrote:
On Sun, Oct 6, 2019 at 3:25 PM Guenter Roeck <linux@xxxxxxxxxxxx> wrote:
this patch causes all my sparc64 emulations to stall during boot. It causes
all alpha emulations to crash with [1a] and [1b] when booting from a virtual
disk, and one of the xtensa emulations to crash with [2].
[...]
[2]
Unable to handle kernel paging request at virtual address 0000000000000004
reboot(50): Oops -1
pc = [<0000000000000004>] ra = [<fffffc00004512e4>] ps = 0000 Tainted: G D
pc is at 0x4
ra is at filldir64+0x64/0x320
v0 = 0000000000000000 t0 = 0000000067736d6b t1 = 000000012011445b
t2 = 0000000000000000 t3 = 0000000000000000 t4 = 0000000000007ef8
t5 = 0000000120114448 t6 = 0000000000000000 t7 = fffffc0007eec000
s0 = fffffc000792b5c3 s1 = 0000000000000004 s2 = 0000000000000018
s3 = fffffc0007eefec8 s4 = 0000000000000008 s5 = 00000000f00000a3
s6 = 000000000000000b
a0 = fffffc000792b5c3 a1 = 2f2f2f2f2f2f2f2f a2 = 0000000000000004
a3 = 000000000000000b a4 = 00000000f00000a3 a5 = 0000000000000008
t8 = 0000000000000018 t9 = 0000000000000000 t10= 0000000022e1d02a
t11= 000000011fd6f3b8 pv = fffffc0000b9a810 at = 0000000022e1ccf8
gp = fffffc0000f03930 sp = (____ptrval____)
Trace:
[<fffffc00004ccba0>] proc_readdir_de+0x170/0x300
[<fffffc0000451280>] filldir64+0x0/0x320
[<fffffc00004c565c>] proc_root_readdir+0x3c/0x80
[<fffffc0000450c68>] iterate_dir+0x198/0x240
[<fffffc00004518b8>] ksys_getdents64+0xa8/0x160
[<fffffc0000451990>] sys_getdents64+0x20/0x40
[<fffffc0000451280>] filldir64+0x0/0x320
[<fffffc0000311634>] entSys+0xa4/0xc0
This doesn't look like a dump from xtensa core.
v5.4-rc2 kernel doesn't crash for me on xtensa, but the userspace
doesn't work well, because all directories appear to be empty.
__put_user/__get_user don't do unaligned access on xtensa,
they check address alignment and return -EFAULT if it's bad.
You are right, sorry; I must have mixed that up. xtensa doesn't crash.
The boot stalls, similar to sparc64. This is only seen with my nommu
test (de212:kc705-nommu:nommu_kc705_defconfig). xtensa mmu tests are fine,
at least for me, but then I only run tests with initrd (which for some
reason doesn't crash on alpha either).
Guenter
