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[Qemu-devel] SPARC64 supported processors
From: |
Pasha Tatashin |
Subject: |
[Qemu-devel] SPARC64 supported processors |
Date: |
Tue, 27 Jun 2017 13:59:55 -0400 |
User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:52.0) Gecko/20100101 Thunderbird/52.2.1 |
Hi,
I am trying to evaluate the current qemu support for sparc64 processors.
First, it seems -smp is not supported for any processor, is this
correct? When I set -smp greater than 1, I am getting:
qemu-system-sparc64: Number of SMP CPUs requested (2) exceeds max CPUs
supported by machine 'sun4u' (1)
I've done some testing for all available sparc64 cpus + latest linux kernel:
Fujitsu Sparc64 Working
Fujitsu Sparc64 III Exception 0x30 (DAE_side_effect_page) in OpenBios
Fujitsu Sparc64 IV Working
Fujitsu Sparc64 V Working
TI UltraSparc I Working
TI UltraSparc II Working
TI UltraSparc IIi Working
TI UltraSparc IIe Exception 0x28 (division_by_zero) in init_tick_ops
Can make it to work if is_hummingbird() is changed
to return 0. The IO stick, and OpenBios stick properties
are absent, so we have to default to %tick for now.
Sun UltraSparc III Illegal instruction in cheetah_boot():
wr %g0, %g1, %dcr
It appears dispatch control register is not implemented.
Sun UltraSparc IIIi
Sun UltraSparc IV
Sun UltraSparc IV+
Sun UltraSparc IIIi+
In these four CPUs, I am getting exception 0x32 in
cheetah_generic_boot: stxa %g0, [ %g3 ] #ASI_DMMU
Sun UltraSparc T1
Sun UltraSparc T2
Both of the above boot pretty far but fail in this function when tmpfs
is mounted:
direct_pcr_write(unsigned long reg_num, u64 val)
__asm__ __volatile__("wr %0, 0x0, %%pcr" : : "r" (val));
Seems like performance counter registers are not supported.
needed to add these to kernel parameters:
keep_bootcon -> to see where we are panicking
lpj=1000 -> jiffers could not calculate for some reason.
NEC UltraSparc I Working
Does this look right or may be I have missed something, and we can get
some of the Sun UltraSparc to work for example?
Thank you,
Pasha
- [Qemu-devel] SPARC64 supported processors,
Pasha Tatashin <=