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authorPaul Mackerras <paulus@samba.org>2015-03-20 12:39:39 +0300
committerAlexander Graf <agraf@suse.de>2015-03-20 13:42:08 +0300
commitecb6d6185b3ae40067330eb889977bf2a51f7429 (patch)
tree6eac4ed0d17496a2d9e0a01c6326591442e16b96 /arch/powerpc/kvm
parent8f902b005ece690f0f50b217975601b804905dc8 (diff)
downloadlinux-ecb6d6185b3ae40067330eb889977bf2a51f7429.tar.xz
KVM: PPC: Book3S HV: Endian fix for accessing VPA yield count
The VPA (virtual processor area) is defined by PAPR and is therefore big-endian, so we need a be32_to_cpu when reading it in kvmppc_get_yield_count(). Without this, H_CONFER always fails on a little-endian host, causing SMP guests to waste time spinning on spinlocks. Signed-off-by: Paul Mackerras <paulus@samba.org> Signed-off-by: Alexander Graf <agraf@suse.de>
Diffstat (limited to 'arch/powerpc/kvm')
-rw-r--r--arch/powerpc/kvm/book3s_hv.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/powerpc/kvm/book3s_hv.c b/arch/powerpc/kvm/book3s_hv.c
index b2731933f807..de747563d29d 100644
--- a/arch/powerpc/kvm/book3s_hv.c
+++ b/arch/powerpc/kvm/book3s_hv.c
@@ -636,7 +636,7 @@ static int kvmppc_get_yield_count(struct kvm_vcpu *vcpu)
spin_lock(&vcpu->arch.vpa_update_lock);
lppaca = (struct lppaca *)vcpu->arch.vpa.pinned_addr;
if (lppaca)
- yield_count = lppaca->yield_count;
+ yield_count = be32_to_cpu(lppaca->yield_count);
spin_unlock(&vcpu->arch.vpa_update_lock);
return yield_count;
}