Hi,
I noticed that booting Linux on PXA emulations no longer works with qemu v5.2.
When trying to boot akita, borzoi, or similar emulations, I get the following
crash.
[ 0.965279] Internal error: Oops - undefined instruction: 0 [#1] PREEMPT ARM
[ 0.967273] Modules linked in:
[ 0.967875] CPU: 0 PID: 1 Comm: swapper Not tainted
5.10.2-rc1-00017-gc96cfd687a3f #1
[ 0.968101] Hardware name: SHARP Akita
[ 0.968676] PC is at xscale_cp0_init+0x84/0x114
[ 0.968815] LR is at do_one_initcall+0x60/0x290
[ 0.968997] pc : [<c08ce068>] lr : [<c000a2dc>] psr: 60000013
[ 0.969186] sp : c0bdfec8 ip : c0bdfee0 fp : c0bdfedc
[ 0.969332] r10: c08fe834 r9 : c09f2000 r8 : c08c6a9c
[ 0.969498] r7 : c09e0c00 r6 : 00000000 r5 : 00002041 r4 : 00002040
[ 0.969679] r3 : 00000100 r2 : 00000000 r1 : 69052000 r0 : 00000000
[ 0.969892] Flags: nZCv IRQs on FIQs on Mode SVC_32 ISA ARM Segment none
[ 0.970123] Control: 00007977 Table: a22e0000 DAC: 00000071
[ 0.970349] Process swapper (pid: 1, stack limit = 0x(ptrval))
[ 0.970564] Stack: (0xc0bdfec8 to 0xc0be0000)
[ 0.970818] fec0: c08cdfe4 ffffe000 c0bdff4c c0bdfee0
c000a2dc c08cdff0
[ 0.971144] fee0: c004b8a0 c08c9458 c0bdfee4 00000000 00000dc0 00000000
00000007 00000007
[ 0.971438] ff00: 00000000 c07fc180 c08c944c c08c6a9c c017213c c0c07c4c
c0c07c54 c092d028
[ 0.971728] ff20: 00000000 000000a0 c0c07c20 c092d028 c09293fc c0c07c20
00000008 c08fe854
[ 0.972026] ff40: c0bdff94 c0bdff50 c08ca220 c000a288 00000007 00000007
00000000 c08c944c
[ 0.972315] ff60: ffffe000 000000a0 c0bdff8c 00000000 c0671de8 00000000
00000000 00000000
[ 0.972603] ff80: 00000000 00000000 c0bdffac c0bdff98 c0671e00 c08ca0d8
00000000 c0671de8
[ 0.972891] ffa0: 00000000 c0bdffb0 c0008360 c0671df4 00000000 00000000
00000000 00000000
[ 0.973199] ffc0: 00000000 00000000 00000000 00000000 00000000 00000000
00000000 00000000
[ 0.973488] ffe0: 00000000 00000000 00000000 00000000 00000013 00000000
00000000 00000000
[ 0.973763] Backtrace:
[ 0.974001] [<c08cdfe4>] (xscale_cp0_init) from [<c000a2dc>]
(do_one_initcall+0x60/0x290)
[ 0.974282] r5:ffffe000 r4:c08cdfe4
[ 0.974564] [<c000a27c>] (do_one_initcall) from [<c08ca220>]
(kernel_init_freeable+0x154/0x1dc)
[ 0.974791] r7:c08fe854 r6:00000008 r5:c0c07c20 r4:c09293fc
[ 0.974948] [<c08ca0cc>] (kernel_init_freeable) from [<c0671e00>]
(kernel_init+0x18/0x110)
[ 0.975191] r10:00000000 r9:00000000 r8:00000000 r7:00000000 r6:00000000
r5:c0671de8
[ 0.975394] r4:00000000
[ 0.975476] [<c0671de8>] (kernel_init) from [<c0008360>]
(ret_from_fork+0x14/0x34)
[ 0.975695] Exception stack(0xc0bdffb0 to 0xc0bdfff8)
[ 0.975885] ffa0: 00000000 00000000
00000000 00000000
[ 0.976184] ffc0: 00000000 00000000 00000000 00000000 00000000 00000000
00000000 00000000
[ 0.976458] ffe0: 00000000 00000000 00000000 00000000 00000013 00000000
[ 0.976657] r5:c0671de8 r4:00000000
[ 0.976961] Code: e1a03003 e24ff004 e3a02000 e3a03c01 (ec432000)
The code is:
70: ee1f3f11 mrc 15, 0, r3, cr15, cr1, {0}
74: e1a03003 mov r3, r3
78: e24ff004 sub pc, pc, #4
7c: e3a02000 mov r2, #0
80: e3a03c01 mov r3, #256 ; 0x100
84: ec432000 mar acc0, r2, r3
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
This is supposed to be a DSP or iWMMXt coprocessor instruction.
I did notice that the code to support xscale instructions has changed
significantly
in qemu v5.2.
Does this mean that there is a bug, that the affected emulations are no longer
supported, that I now have to specify some new option on the qemu command line,
or something else ?
Thanks,
Guenter
