Patchwork [27/35] KVM: PPC: Enable napping only for Book3s_64

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Submitter Alexander Graf
Date Aug. 31, 2010, 2:32 a.m.
Message ID <1283221937-21006-28-git-send-email-agraf@suse.de>
Download mbox | patch
Permalink /patch/63179/
State Not Applicable
Headers show

Comments

Alexander Graf - Aug. 31, 2010, 2:32 a.m.
Before I incorrectly enabled napping also for BookE, which would result in
needless dcache flushes. Since we only need to force enable napping on
Book3s_64 because it doesn't go into MSR_POW otherwise, we can just #ifdef
that code to this particular platform.

Reported-by: Scott Wood <scottwood@freescale.com>
Signed-off-by: Alexander Graf <agraf@suse.de>
---
 arch/powerpc/kernel/kvm.c |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)

Patch

diff --git a/arch/powerpc/kernel/kvm.c b/arch/powerpc/kernel/kvm.c
index 95aed6b..293765a 100644
--- a/arch/powerpc/kernel/kvm.c
+++ b/arch/powerpc/kernel/kvm.c
@@ -583,8 +583,10 @@  static int __init kvm_guest_init(void)
 	if (kvm_para_has_feature(KVM_FEATURE_MAGIC_PAGE))
 		kvm_use_magic_page();
 
+#ifdef CONFIG_PPC_BOOK3S_64
 	/* Enable napping */
 	powersave_nap = 1;
+#endif
 
 free_tmp:
 	kvm_free_tmp();