Hi, On 25/08/16 14:17, Ed Swierk wrote: > 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.
*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 > On Thu, Aug 25, 2016 at 4:10 AM, James Cowgill <jcowg...@debian.org> wrote: >> Control: tags -1 patch >> >> On 19/08/16 22:42, Aurelien Jarno wrote: >>> 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
Index: en/issues.dbk
===================================================================
--- en/issues.dbk (revision 11283)
+++ en/issues.dbk (working copy)
@@ -118,6 +118,31 @@
to i686 for the Debian i386 architecture</ulink>.
</para>
</section>
+ <section id="mips-requires-r2-processor" arch="mips;mipsel">
+ <!-- Jessie to Stretch -->
+ <title>32-bit MIPS now requires an R2 processor</title>
+ <para>
+ 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.
+ </para>
+ <para>
+ The following shell script can be used to indicate if your machine
+ supports R2 (assuming only one type of processor is present). Note that
+ Loongson-3 processors are supported even though they only claim to
+ support MIPS32 Release 1.
+ </para>
+ <screen>
+if grep -E -q '^isa.*\bmips(32|64)r2\b' /proc/cpuinfo; then
+ echo "OK (R2 supported)"
+elif grep -q '^cpu model.*\bICT Loongson-3\b' /proc/cpuinfo; then
+ echo "OK (Loongson 3)"
+else
+ echo "NOT OK: R2 not supported"
+fi
+</screen>
+ </section>
</section>
<section id="limited-security-support">
Index: release-notes.ent
===================================================================
--- release-notes.ent (revision 11283)
+++ release-notes.ent (working copy)
@@ -87,8 +87,8 @@
--><phrase arch='armel'>ARM EABI</phrase><!--
--><phrase arch='armhf'>ARMv7 (EABI hard-float ABI)</phrase><!--
--><phrase arch='i386'>32-bit PC</phrase><!--
- --><phrase arch='mips'>Mips</phrase><!--
- --><phrase arch='mipsel'>Mipsel</phrase><!--
+ --><phrase arch='mips'>32-bit MIPS (big endian)</phrase><!--
+ --><phrase arch='mipsel'>32-bit MIPS (little endian)</phrase><!--
--><phrase arch='powerpc'>PowerPC</phrase><!--
--><phrase arch='ppc64el'>64-bit little-endian PowerPC</phrase><!--
--><phrase arch='s390'>S/390</phrase><!--
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