(By the way, I know you split these patches because they're different
files, but since patch 5 can't possibly work (or even build) without
patches 6 and 7, they should be joined together.)
On Thu, 2008-12-11 at 17:11 +0800, Liu Yu wrote:
> +int kvmppc_core_vcpu_translate(struct kvm_vcpu *vcpu,
> + struct kvm_translation *tr)
> +{
> + int index;
> + gva_t eaddr;
> + u8 pid;
> + u8 as;
> +
> + eaddr = tr->linear_address;
> + pid = (tr->linear_address >> 32) & 0xff;
> + as = (tr->linear_address >> 40) & 0x1;
> +
> + index = kvmppc_e500_tlb_search(vcpu, eaddr, as);
Why are you discarding pid here? Which brings up the next point, from a
later patch:
> +int kvmppc_e500_tlb_search(struct kvm_vcpu *vcpu,
> + gva_t eaddr, int as)
> +{
> + struct kvmppc_vcpu_e500 *vcpu_e500 = to_e500(vcpu);
> + int esel, tlbsel;
> +
> + for (tlbsel = 0; tlbsel < 2; tlbsel++) {
> + esel = e500_tlb_index(vcpu_e500, eaddr, tlbsel,
> + get_cur_pid(vcpu), as);
> + if (esel >= 0)
> + return index_of(tlbsel, esel);
> + }
> +
> + return -1;
> +}
You can't possibly search a TLB without knowing the EA, AS, *and* PID.
accordingly, PID should be a parameter to this function.
Now, if you told me you wanted to support e500's multiple PID registers,
I could understand that's something of an interface issue. But you're
not, so...
By the way, do you happen to know if any major operating systems use
PID1 or PID2?
--
Hollis Blanchard
IBM Linux Technology Center
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