[bisected] KVM in 3.19-rc1 is completely broken

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I can't get it to work at all.  It fails with:

KVM internal error. Suberror: 1
emulation failure
EAX=000dee58 EBX=00000000 ECX=00000000 EDX=00000cfd
ESI=00000059 EDI=00000000 EBP=00000000 ESP=00006fc4
EIP=000f17f4 EFL=00010012 [----A--] CPL=0 II=0 A20=1 SMM=0 HLT=0
ES =0010 00000000 ffffffff 00c09300 DPL=0 DS   [-WA]
CS =0008 00000000 ffffffff 00c09b00 DPL=0 CS32 [-RA]
SS =0010 00000000 ffffffff 00c09300 DPL=0 DS   [-WA]
DS =0010 00000000 ffffffff 00c09300 DPL=0 DS   [-WA]
FS =0010 00000000 ffffffff 00c09300 DPL=0 DS   [-WA]
GS =0010 00000000 ffffffff 00c09300 DPL=0 DS   [-WA]
LDT=0000 00000000 0000ffff 00008200 DPL=0 LDT
TR =0000 00000000 0000ffff 00008b00 DPL=0 TSS32-busy
GDT=     000f6c58 00000037
IDT=     000f6c96 00000000
CR0=60000011 CR2=00000000 CR3=00000000 CR4=00000000
DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000
DR3=0000000000000000
DR6=00000000ffff0ff0 DR7=0000000000000400
EFER=0000000000000000
Code=e8 75 fc ff ff 89 f2 a8 10 89 d8 75 0a b9 74 17 ff ff ff d1 <5b>
5e c3 5b 5e e9 76 ff ff ff 57 56 53 8b 35 38 65 0f 00 85 f6 0f 88 be
00 00 00 0f b7 f6

The problem started with:

commit 0e60b0799fedc495a5c57dbd669de3c10d72edd2
Author: Igor Mammedov <imammedo@xxxxxxxxxx>
Date:   Mon Dec 1 17:29:26 2014 +0000

    kvm: change memslot sorting rule from size to GFN

    it will allow to use binary search for GFN -> memslot
    lookups, reducing lookup cost with large slots amount.

    Signed-off-by: Igor Mammedov <imammedo@xxxxxxxxxx>
    Signed-off-by: Paolo Bonzini <pbonzini@xxxxxxxxxx>


--Andy
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