From: Hollis Blanchard <hollisb@us.ibm.com>
To: linuxppc-dev <linuxppc-dev@ozlabs.org>
Subject: 44x bug: funny TLB writes?
Date: Thu, 20 Sep 2007 22:34:12 -0500 [thread overview]
Message-ID: <1190345652.25483.6.camel@basalt> (raw)
I seem to have come across a strange bug while doing KVM development. It
seems that the final tlbwe in finish_tlb (head_44x.S) is actually
leaking RPN bits into the "attribute" word.
When I set a breakpoint there and press enter on the serial console, I
see r12=ef600703, which is the physical address of the UART on this chip
(440EP), plus the correct permission bits at the bottom.
Am I crazy? I'm not really looking to step through that assembly right
now... Clearly (current) hardware is just ignoring these errant writes,
but it should be fixed.
--
Hollis Blanchard
IBM Linux Technology Center
next reply other threads:[~2007-09-21 3:34 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-09-21 3:34 Hollis Blanchard [this message]
2007-09-21 5:42 ` 44x bug: funny TLB writes? David Gibson
2007-09-21 6:38 ` Hollis Blanchard
2007-09-21 6:47 ` David Gibson
2007-09-21 17:37 ` Hollis Blanchard
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