Re: [PATCH] KVM: PPC: e500mc: Add support for single threaded vcpus on e6500 core
From: Scott Wood <hidden>
Date: 2014-08-11 23:36:53
Also in:
kvm
On Wed, 2014-08-06 at 19:33 +0300, Mihai Caraman wrote:
quoted hunk ↗ jump to hunk
@@ -390,19 +400,30 @@ static void kvmppc_core_vcpu_free_e500mc(struct kvm_vcpu *vcpu) static int kvmppc_core_init_vm_e500mc(struct kvm *kvm) { - int lpid; + int i, lpid; - lpid = kvmppc_alloc_lpid(); - if (lpid < 0) - return lpid; + /* The lpid pool supports only 2 entries now */ + if (threads_per_core > 2) + return -ENOMEM; + + /* Each VM allocates one LPID per HW thread index */ + for (i = 0; i < threads_per_core; i++) { + lpid = kvmppc_alloc_lpid(); + if (lpid < 0) + return lpid; + + kvm->arch.lpid_pool[i] = lpid; + }
Wouldn't it be simpler to halve the size of the lpid pool that the allocator sees, and just OR in the high bit based on the low bit of the cpu number? -Scott