[21/35] KVM: PPC: Force enable nap on KVM

Submitted by Alexander Graf on Aug. 31, 2010, 2:32 a.m.

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Message ID 1283221937-21006-22-git-send-email-agraf@suse.de
State Not Applicable
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Commit Message

Alexander Graf Aug. 31, 2010, 2:32 a.m.
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>
---
 arch/powerpc/kernel/kvm.c |    3 +++
 1 files changed, 3 insertions(+), 0 deletions(-)

Patch hide | download patch | download mbox

diff --git a/arch/powerpc/kernel/kvm.c b/arch/powerpc/kernel/kvm.c
index 517da39..95aed6b 100644
--- a/arch/powerpc/kernel/kvm.c
+++ b/arch/powerpc/kernel/kvm.c
@@ -583,6 +583,9 @@  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();