On 2/28/19 11:14 AM, Cy Schubert wrote:
> On February 28, 2019 11:06:46 AM PST, Conrad Meyer <c...@freebsd.org> wrote:
>> On Thu, Feb 28, 2019 at 10:32 AM Steve Kargl
>> <s...@troutmask.apl.washington.edu> wrote:
>>> This is interesting as well.  Does this mean that amd64 is now
>>> the only tier 1 platform and all other architectures are after
>>> thoughts?
>>
>> This has been the de facto truth for years.  i386 is mostly only
>> supported by virtue of sharing code with amd64.  There are efforts to
>> promote arm64 to Tier 1, but it isn't there yet.  Power8+ might be
>> another good alternative Tier 1 candidate eventually.  None have
>> anything like the developer popularity that amd64 enjoys.
>>
>> Conrad
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> 
> We deprecated and removed support for 386 and 486 processors. We should 
> consider removing support for low end Pentium as well. I'm specifically 
> thinking of removing the workarounds like F00F. Are there any processors that 
> are still vulnerable to this?

We have only removed support for 386 since it didn't support cmpxchg.  We still
nominally support 486s.  I don't know how well FreeBSD 13 would run on a 486, 
but
in theory the code is still there and the binaries shouldn't die with illegal
instruction faults.

-- 
John Baldwin
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