From: Hollis Blanchard <hollisb@us.ibm.com>
To: kvm-ppc@vger.kernel.org
Subject: [kvm-ppc-devel] updated patches (nasty bug fixed)
Date: Tue, 26 Feb 2008 23:04:12 +0000 [thread overview]
Message-ID: <1204067052.28836.89.camel@basalt> (raw)
http://penguinppc.org/~hollisb/kvm/
I just fixed a nasty bug in which the changes to nonvolatile registers
used in "update" form load/store MMIO instructions wouldn't be visible
in the guest. This caused all sorts of nastiness, especially visible
when the guest kernel timer tick code did a BUG_ON(!irqs_disabled),
since the guest MSR had somehow been corrupted.
Also committed various cleanups along the way, and updated to latest KVM
tip. Note: I had to hack a
#define KVM_PAGES_PER_HPAGE (1<<31)
in order to build.
Our current bug occurs when guest userspace continuously writes to the
UART, which ends up "pausing" all output. Apparently UART IRQs are
getting lost somewhere...
--
Hollis Blanchard
IBM Linux Technology Center
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reply other threads:[~2008-02-26 23:04 UTC|newest]
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