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Date: Fri, 31 Jul 2009 10:15:48 +0800
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From: Naruil <naruilone@gmail.com>
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Subject: [Qemu-devel] SPARC32 SMP booting problem
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We are trying to build a tiny SPARC32 Linux SMP kernel for debugging use.
The kernel is compiled with SMP support and Enhanced RTC.

With the command line parameter
   -M SS-600MP -smp 1
the kernel boots successfully.

But with
   -M SS-600MP -smp 2
booting will hang at

SILO Version 1.4.13
boot:
Loaded kernel version 2.6.18
Loading initial ramdisk (3212127 bytes at 0x3000000 phys, 0x60000000
virt)...
PROMLIB: obio_ranges 1
Booting Linux...

In addition, Debian netinst cdrom will hang at this point if booting with
SMP.
NetBSD with an GENERIC.MP kernel can only recognize one core when booting
with 2 cores.

Is there some bug with the SPARC32 SMP implementation?
Or any one know how should I configure the SPARC32 Linux kernel to
boot correctly with SMP?


Many thanks!
Naruil

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<div>We are trying to build a tiny SPARC32 Linux=A0SMP=A0kernel for debuggi=
ng use. The kernel is compiled with SMP support and Enhanced RTC.</div>
<div>=A0</div>
<div>With the command line parameter=A0</div><div>=A0 =A0-M SS-600MP -smp 1=
</div><div>the kernel boots=A0successfully.</div><div><br></div><div>But wi=
th</div><div>=A0=A0 -M SS-600MP -smp 2</div><div>booting will hang at=A0</d=
iv><div><br>


</div><div>SILO Version 1.4.13</div><div>boot:</div><div>Loaded kernel vers=
ion 2.6.18</div><div>Loading initial ramdisk (3212127 bytes at 0x3000000 ph=
ys, 0x60000000 virt)...</div><div>PROMLIB: obio_ranges 1</div><div>Booting =
Linux...</div>


<div><br></div><div>In addition, Debian netinst cdrom will hang at this poi=
nt if booting with SMP.</div><div>NetBSD with an <span class=3D"Apple-style=
-span" style=3D"text-decoration: none;"><a href=3D"http://GENERIC.MP">GENER=
IC.MP</a></span> kernel can only recognize one core when booting with 2 cor=
es.</div>


<div><br></div><div>Is there some bug with the SPARC32 SMP implementation?<=
/div><div>Or any one know how should I configure the SPARC32 Linux kernel t=
o boot=A0correctly with SMP?</div><div><br></div><div><br></div><div>Many t=
hanks!</div>


<div>Naruil</div>

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