Hi,
I have prototyped Live migration with GICv3.
For this I have made following changes
1) Save and Restore of GICv3 registers in QEMU.
- For GICv2, QEMU is saving/restoring GICD, GICC registers. For GICv3,
we have to save/restore GICD, GICR and ICC registers.
However ICC registers are system registers which cannot be
accessed @ EL0 level (SRE=1). So these ICC registers should be
accessed as mmio registers by QEMU, for this we have to add ioctl to
access ICC @ EL1 level similar to GICC registers of GICv2.
2) KVM ioctls in kernel provides only 32-bit register access to GIC
registers, where
as some registers in GICD/GICR requires 64-bit register access. I
propose to use mmio.flag to specify 32/64 bit access.
3) KVM ioctls to access ICC registers for GICv3
Please provide your initial feedback. Let me know if some of this
issues are already fixed
I am attending KVM-forum next week @ Seattle. We can discuss there as well.
Regards
Vijay
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