Hi,
In kvm_setup_pio() we have code like this:
kvm_arch_ops->cache_regs(vcpu);
memcpy(vcpu->pio_data, &vcpu->regs[VCPU_REGS_RAX], 4);
kvm_arch_ops->decache_regs(vcpu);
So what is the reason of saving RSP and RIP before the memcpy()
function, then recovering it right after that?
AFAICS, there nothing is change by the memcpy() function, so I cannot
figure it out why it is necessary to do that.
Many thanks,
Jun
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