KVM: PPC: factor out lpid allocator from book3s_64_mmu_hv
We'll use it on e500mc as well.
Signed-off-by: Scott Wood <scottwood@freescale.com>
Signed-off-by: Alexander Graf <agraf@suse.de>
Signed-off-by: Avi Kivity <avi@redhat.com>
diff --git a/arch/powerpc/kvm/powerpc.c b/arch/powerpc/kvm/powerpc.c
index b5e9046..cd53e08 100644
--- a/arch/powerpc/kvm/powerpc.c
+++ b/arch/powerpc/kvm/powerpc.c
@@ -799,6 +799,40 @@
return r;
}
+static unsigned long lpid_inuse[BITS_TO_LONGS(KVMPPC_NR_LPIDS)];
+static unsigned long nr_lpids;
+
+long kvmppc_alloc_lpid(void)
+{
+ long lpid;
+
+ do {
+ lpid = find_first_zero_bit(lpid_inuse, KVMPPC_NR_LPIDS);
+ if (lpid >= nr_lpids) {
+ pr_err("%s: No LPIDs free\n", __func__);
+ return -ENOMEM;
+ }
+ } while (test_and_set_bit(lpid, lpid_inuse));
+
+ return lpid;
+}
+
+void kvmppc_claim_lpid(long lpid)
+{
+ set_bit(lpid, lpid_inuse);
+}
+
+void kvmppc_free_lpid(long lpid)
+{
+ clear_bit(lpid, lpid_inuse);
+}
+
+void kvmppc_init_lpid(unsigned long nr_lpids_param)
+{
+ nr_lpids = min_t(unsigned long, KVMPPC_NR_LPIDS, nr_lpids_param);
+ memset(lpid_inuse, 0, sizeof(lpid_inuse));
+}
+
int kvm_arch_init(void *opaque)
{
return 0;