From mboxrd@z Thu Jan 1 00:00:00 1970
From: bugzilla-daemon@bugzilla.kernel.org
Subject: [Bug 107561] 4.2 breaks PCI passthrough in QEMU/KVM
Date: Thu, 10 Dec 2015 21:51:20 +0000
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--- Comment #11 from Paolo Bonzini ---
Created attachment 197071
--> https://bugzilla.kernel.org/attachment.cgi?id=197071&action=edit
OVMF log
> 1) providing host dmesg
Of course this makes no sense, you already did. And from the traces I suspect
that /proc/mtrr is the same on the two guests. The culprit seems to be this
MTRR:
qemu-system-x86-2228 [002] 127.763684: kvm_msr: msr_read 201 = 0xff80000800
qemu-system-x86-2228 [002] 127.763685: kvm_msr: msr_read 200 = 0x80000000
which is set up by OVMF. I'm attaching the OVMF output for reference (it can
be extracted from the traces with "trace-cmd report trace-3GBmem.dat |grep
0x402 | awk --non-decimal-data '{printf "%c", 0+$NF}' > OVMF.log").
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