Date: Fri, 1 Oct 2010 09:00:18 +0100 From: Chris Webb <chris.webb@elastichosts.com> To: Luke Marsden <luke@hybrid-logic.co.uk> Cc: support@elastichosts.com, team@hybrid-logic.co.uk, freebsd-stable@FreeBSD.org, Jung-uk Kim <jkim@FreeBSD.org> Subject: Re: Problem running 8.1R on KVM with AMD hosts Message-ID: <20101001080017.GB2371@arachsys.com> In-Reply-To: <1285892522.21063.1437.camel@pow> References: <1285587910.31122.633.camel@pow> <1285601367.31122.909.camel@pow> <1285873071.21063.786.camel@pow> <201009301855.51841.jkim@FreeBSD.org> <1285892522.21063.1437.camel@pow>
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Luke Marsden <luke@hybrid-logic.co.uk> writes: > On Thu, 2010-09-30 at 18:55 -0400, Jung-uk Kim wrote: > > It seems MCA capability is advertised by the CPUID translator but > > writing to the MSRs causes GPF. In other words, it seems like a CPU > > emulator bug. A simple workaround is 'set hw.mca.enabled=0' from the > > loader prompt. If it works, add hw.mca.enabled="0" > > in /boot/loader.conf to make it permanent. MCA does not make any > > sense in emulation any way. Many thanks for tracking this one down for us! > Awesome, this allows us to boot 8.1R on Linux KVM with AMD hardware! I'll patch the system on lon-b not to advertise mca this morning Luke. It'll be interesting to try again once I've done this to check if it fixes normal booting without the extra hw.mca_enabled="0" flag. Best wishes, Chris.
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