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Date: Wed, 09 Dec 2020 20:05:14 +0100
From: cinap_lenrek@felloff.net
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Subject: Re: [9front] kernel crash in bhyve
Reply-To: 9front@9front.org
Precedence: bulk

the wmsr 0x401 is harmless. its trying to initialize
the MCE registers. you can get rid of it by passing
*nomce= to the kernel.

for the panic...

is this a regression or the first time you tried it?

the kernel calls rampage() initially to get memory
for the page tables todo the mappings at KZERO.

if this is a regression, you might try the *nomtrr=
flag. maybe the mtrr's are giving strange cache
attributes which makes the kernel exclude it from
the memory map.

the relevant line is here:

	/* RAM needs to be writeback */
	mtrrexclude(MemRAM, "wb");

maybe you can insert a call of memmapdump() before
and after this line?

--
cinap