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Re: [Xen-users] Shared information between VMM's vcpu and guest's cpu structure

On Sat, Jun 21, 2014 at 12:27:16AM +0900, emzei wrote:
> Hi, I want to edit some Xen and guest's code for sharing small information
> between VMM and Guest.
> Although VMM virtualize the physical CPU into virtual CPU,  guest can
> recognize just a physical CPU that is actually virtualized by VMM. right?
> I want to send some information from guest to xen by using of CPU structure.
> Without hypercall or other event, I just want to use only some fields in
> CPU structure.
> For that, I searched the vcpu structure and guest's cpu structure.
> If I extended the vcpu structure with a new field, then how can I reflect
> the field in Guest's cpu structure?
> or, is it can be a way that just keep some information into CPU's register
> for sharing information between guest and vmm?
> i only have a idea, but I don't know how to implement .

Have a look at VCPUOP_register_vcpu_info in both Linux kernel and Xen


> thank you for reading!
> best regards,
> emzei

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