KVM: PPC: Force enable nap on KVM

There are some heuristics in the PPC power management code that try to find
out if the particular hardware we're running on supports proper power management
or just hangs the machine when going into nap mode.

Since we know that KVM is safe with nap, let's force enable it in the PV code
once we're certain that we are on a KVM VM.

Signed-off-by: Alexander Graf <agraf@suse.de>

diff --git a/arch/powerpc/kernel/kvm.c b/arch/powerpc/kernel/kvm.c
index 48a03386541064756bc492624d7a84477eab39f8..669d989be1d60762f18e520603a88d1d99fb22d4 100644 (file)
--- a/arch/powerpc/kernel/kvm.c
+++ b/arch/powerpc/kernel/kvm.c
@@ -582,6 +582,9 @@ static int __init kvm_guest_init(void)
        if (kvm_para_has_feature(KVM_FEATURE_MAGIC_PAGE))
                kvm_use_magic_page();
 
+       /* Enable napping */
+       powersave_nap = 1;
+
 free_tmp:
        kvm_free_tmp();