[Qemu-devel] Re: RFC: New API for PPC for vcpu mmu access

[Avi Kivity]

On 02/03/2011 11:19 AM, Alexander Graf wrote:
> >
> >  I have no idea what things will look like 10 years down the road, but
> >  currently e500mc has 576 entries (512 TLB0, 64 TLB1).
>
> That sums up to 64 * 576 bytes, which is 36kb. Ouch. Certainly nothing we want 
> to transfer every time qemu feels like resolving an EA.

You could have an ioctl to translate addresses (x86 had KVM_TRANSLATE or 
similar), or have the TLB stored in user memory, so there is no need to 
transfer it (on the other hand, you have to re-validate it every time 
you peek at it).

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