From: Paolo Bonzini <pbonzini@redhat.com>
To: Nadav Amit <nadav.amit@gmail.com>,
Wanpeng Li <wanpeng.li@linux.intel.com>
Cc: Nadav Amit <namit@cs.technion.ac.il>,
"gleb@kernel.org" <gleb@kernel.org>,
"tglx@linutronix.de" <tglx@linutronix.de>,
"mingo@redhat.com" <mingo@redhat.com>,
"hpa@zytor.com" <hpa@zytor.com>,
"x86@kernel.org" <x86@kernel.org>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
"kvm@vger.kernel.org" <kvm@vger.kernel.org>
Subject: Re: [PATCH] KVM: x86: Increase the number of fixed MTRR regs to 10
Date: Mon, 18 Aug 2014 16:39:24 +0200 [thread overview]
Message-ID: <53F2101C.4090707@redhat.com> (raw)
In-Reply-To: <D020ADA9-A9D5-4F29-911A-4742E64E4DEC@gmail.com>
Il 18/08/2014 16:31, Nadav Amit ha scritto:
> The cause for the blue-screen appears to be seabios, which leaves only 0x20 slots for “smp_mtrr”s.
> Apparently, the increase in the variable range MTRR count caused it to exhaust the available slots.
> As a result, some MSRs are not initialised by the BIOS (specifically, 3.5-4GB are not marked as UC), and cause Windows to panic.
>
> Once we increase the size of the array smp_mtrr in seabios, Windows boots.
>
> Paolo, you may wish to revert the patch. Please note that it was applied to some stable branches.
Thanks. I'll post a patch to SeaBIOS too, since this should happen on
bare metal too.
Paolo
prev parent reply other threads:[~2014-08-18 14:39 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-06-18 14:21 [PATCH] KVM: x86: Increase the number of fixed MTRR regs to 10 Nadav Amit
2014-08-18 2:17 ` Wanpeng Li
2014-08-18 6:39 ` Nadav Amit
2014-08-18 8:11 ` Wanpeng Li
2014-08-18 9:39 ` Nadav Amit
2014-08-18 14:31 ` Nadav Amit
2014-08-18 14:39 ` Paolo Bonzini [this message]
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