Processed: Re: Bug#834844: release-notes: document that mips* arches now require a R2 CPU

[Debian Bug Tracking System]

tags -1 patch

Bug #834844 [release-notes] release-notes: document that mips* arches now require a R2 CPU
Added tag(s) patch.

[James Cowgill]

Control: tags -1 patch

This is something to be expected as the mips and mipsel port now
defaults to using R2 instructions set. This means the Loongson 2
CPUs are not supported anymore (this includes the Yeeloong machine).
I have asked many times to document this changes in the release notes,
but this hasn't been done yet. I am therefore reassigning the bug there,
Cc:ing debian-mips so that somone can take care of that.

How about the attached patch? It's loosely based on the i686 notes just
above.

I also changed the "human readable" mips architecture names since all
the other arches seem to have them.

James

[Ed Swierk]

This mips32r2 requirement also appears to exclude Cavium Octeon:

https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/tree/arch/mips/include/asm/mach-cavium-octeon/cpu-feature-overrides.h#n50

If that's accurate, it would be worth mentioning in the release notes as well.

Post by James Cowgill
Control: tags -1 patch

This is something to be expected as the mips and mipsel port now
defaults to using R2 instructions set. This means the Loongson 2
CPUs are not supported anymore (this includes the Yeeloong machine).
I have asked many times to document this changes in the release notes,
but this hasn't been done yet. I am therefore reassigning the bug there,
Cc:ing debian-mips so that somone can take care of that.

How about the attached patch? It's loosely based on the i686 notes just
above.
I also changed the "human readable" mips architecture names since all
the other arches seem to have them.
James

[James Cowgill]

Hi,

Post by Ed Swierk
https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/tree/arch/mips/include/asm/mach-cavium-octeon/cpu-feature-overrides.h#n50
If that's accurate, it would be worth mentioning in the release notes as well.

*sigh* Cavium Octeon machines do support R2 (mips32r2 is a subset of
mips64r2) but for some reason unknown to me, don't actually expose this.
I've adjusted the check to look for mips64r2 as well and attached a new
patch.

Thanks,
James

Post by Ed Swierk

Post by James Cowgill
Control: tags -1 patch

This is something to be expected as the mips and mipsel port now
defaults to using R2 instructions set. This means the Loongson 2
CPUs are not supported anymore (this includes the Yeeloong machine).
I have asked many times to document this changes in the release notes,
but this hasn't been done yet. I am therefore reassigning the bug there,
Cc:ing debian-mips so that somone can take care of that.

How about the attached patch? It's loosely based on the i686 notes just
above.
I also changed the "human readable" mips architecture names since all
the other arches seem to have them.
James

[Ed Swierk]

Post by James Cowgill
*sigh* Cavium Octeon machines do support R2 (mips32r2 is a subset of
mips64r2) but for some reason unknown to me, don't actually expose this.
I've adjusted the check to look for mips64r2 as well and attached a new
patch.

Looks good. Thanks.

--Ed

[Aurelien Jarno]

Post by James Cowgill
Hi,

Post by Ed Swierk
https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/tree/arch/mips/include/asm/mach-cavium-octeon/cpu-feature-overrides.h#n50
If that's accurate, it would be worth mentioning in the release notes as well.

*sigh* Cavium Octeon machines do support R2 (mips32r2 is a subset of
mips64r2) but for some reason unknown to me, don't actually expose this.
I've adjusted the check to look for mips64r2 as well and attached a new
patch.

Thanks for the patch, it looks fine to me.

Cheers,
Aurelien

[Aaro Koskinen]

Hi,

+ The 32-bit MIPS support (both big and little endian) now requires a
+ processor supporting MIPS32 Release 2 of the MIPS instruction set.
+ Notably the Loongson-2E/2F and systems based on them (including the
+ Yeeloong laptop) are no longer supported.

So, what HW is there available today to run 32-bit MIPS Debian on?

A.

[James Cowgill]

Post by Aaro Koskinen
Hi,

+ The 32-bit MIPS support (both big and little endian) now requires a
+ processor supporting MIPS32 Release 2 of the MIPS instruction set.
+ Notably the Loongson-2E/2F and systems based on them (including the
+ Yeeloong laptop) are no longer supported.

So, what HW is there available today to run 32-bit MIPS Debian on?

mips32r2/mips64r2 was released in 2002. I expect the vast majority of
MIPS processors you can buy today support R2. Things that work with R2
include almost all recent routers, loongson 3 processors, cavium
processors, the ci20 ...

James

[Debian Bug Tracking System]

Your message dated Sun, 05 Feb 2017 14:01:00 +0000
with message-id <405cd9d8-6131-3349-4619-***@thykier.net>
and subject line Re: Bug#834844: release-notes: document that mips* arches now require a R2 CPU
has caused the Debian Bug report #834844,
regarding release-notes: document that mips* arches now require a R2 CPU
to be marked as done.

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