x86-64


Qemu simulate NUMA and parse SRAT


I'm trying to simulate a NUMA system with Qemu/KVM and read the memory from SRAT. I'm starting qemu with
qemu-system-x86_64 -boot d -cdrom myiso.iso -m 5G -smp 4 -numa node,nodeid=0 -numa node,nodeid=1 -enable-kvm
So there are two regions with two cores each and 5gb memory at the whole system. By parsing the srat, I'll find four entries at the table:
Domain: 0
Addr: 0x0
Len: 0xa0000
Flags: 0x1
======
Domain: 0
Addr: 0x100000
Len: 0x9ff00000
Flags: 0x1
======
Domain: 1
Addr: 0xa0000000
Len: 0x20000000
Flags: 0x1
======
Domain: 1
Addr: 0x0
Len: 0x80000000
Flags: 0x1
======
I don't understand the the last entry. Why does he start at memory address 0?

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