Avi Kivity wrote:
The instruction at 0x28 is enabling paging, next insn fetch faults, so
the paging structures must be incorrect.
Questions:
- what is the u64 at cr3? (call it pte4)
- what is the u64 at (pte4 & ~0xfff)? (call it pte3)
- what is the u64 at (pte3 & ~0xfff)? ("pte2")
- what is the u64 at ((pte2 & ~0xfff) + 2048)? ("pte1")
Note if bit 7 of pte2 is set, then pte1 is unneeded.
Sorry for the delay. Here you go:
penberg@tiger:~/vm$ ./kvm bzImage
KVM exit reason: 8 ("KVM_EXIT_SHUTDOWN")
Registers:
rip: 00000000001000ed rsp: 00000000005d54b8 flags: 0000000000010046
rax: 0000000080000001 rbx: 0000000001f2c000 rcx: 00000000c0000080
rdx: 0000000000000000 rsi: 0000000000013670 rdi: 0000000002408000
rbp: 0000000000100000 r8: 0000000000000000 r9: 0000000000000000
r10: 0000000000000000 r11: 0000000000000000 r12: 0000000000000000
r13: 0000000000000000 r14: 0000000000000000 r15: 0000000000000000
cr0: 0000000080000011 cr2: 00000000001000ed cr3: 0000000002402000
cr4: 0000000000000020 cr8: 0000000000000000
Segment registers:
register selector base limit type p dpl db s l g avl
cs 0010 0000000000000000 ffffffff 0b 1 0 1 1 0 1 0
ss 0018 0000000000000000 ffffffff 03 1 0 1 1 0 1 0
ds 0018 0000000000000000 ffffffff 03 1 0 1 1 0 1 0
es 0018 0000000000000000 ffffffff 03 1 0 1 1 0 1 0
fs 0018 0000000000000000 ffffffff 03 1 0 1 1 0 1 0
gs 0018 0000000000000000 ffffffff 03 1 0 1 1 0 1 0
tr 0020 0000000000001000 00000067 0b 1 0 0 0 0 0 0
ldt 0000 0000000000000000 ffffffff 00 0 0 0 0 0 0 0
gdt 00000000005ca458 00000030
idt 0000000000000000 00000000
[ efer: 0000000000000500 apic base: 0000000000000000 nmi: disabled ]
Interrupt bitmap:
0000000000000000 0000000000000000 0000000000000000 0000000000000000
Code: 08 49 75 f3 8d 83 00 60 4d 00 0f 22 d8 b9 80 00 00 c0 0f 32 0f ba
e8 08 0f 30 6a 10 8d 85 00 02 00 00 50 b8 01 00 00 80 0f 22 c0 <cb> f4
eb fd 9c 6a 00 9d 9c 58 89 c3 35 00 00 20 00 50 9d 9c 58
Stack:
0x005d54b8: 00 02 10 00 10 00 00 00
0x005d54c0: 00 00 00 00 00 00 00 00
0x005d54c8: 00 00 00 00 00 00 00 00
0x005d54d0: 00 00 00 00 00 00 00 00
Page Tables:
pte4: 0000000002403007 pte3: 0000000002404007 pte2: 0000000000000183
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