Re: [Qemu-devel] [PATCH 0/4] SPARC64: Implement sparcv9 ldfa/stfa instructions

[Artyom Tarasenko]

On Thu, Jul 14, 2011 at 5:13 AM,  <address@hidden> wrote:
> Hi,
>
> At Wed, 13 Jul 2011 19:34:10 +0300,
> Blue Swirl wrote:
>> On Wed, Jul 13, 2011 at 3:48 PM,  <address@hidden> wrote:
>> > At Wed, 13 Jul 2011 13:09:28 +0100,
>> > Mark Cave-Ayland wrote:
>> >> >> Nice series!
>> >> >> May I ask what have you used as a test case to discover the problem?
>> >> >
>> >> > I found the problem when I was trying to run the linux/sparc64 kernel.
>> >> > It seemed that copy_to_user() did not work as expected.
>> >>
>> >> That's good to hear. How far have you managed to get a 64-bit Linux
>> >> kernel to boot to date?
>> >
>> > With dirty hacks other than the ldfa/stfa fixes, I have managed
>> > to get the busybox shell prompt using a kernel with initramfs.
>> > I'm planning to send other fixes after cleaning them up.
>>
>> Great! In which areas are the hacks needed?
>
> Roughly speaking I've added/changed the following so far:
> - %fprs register dirty bits support

O, that's interesting. Does glibc use it?

> - hardware interrupt handing (both interrupt controller and cpu side)
>  also needed to modify the openbios.

Nice. A lot of work indeed.

> - nonfaulting load ASI
>  glibc memcpy seems to use nonfaulting loads

You mean other than the implemented 0x82/83 and 0x8a/8b ones, or that
the current implementation is buggy?


-- 
Regards,
Artyom Tarasenko

solaris/sparc under qemu blog: http://tyom.blogspot.com/