Patchwork [08/10] KVM: PPC: Stub emulate CFAR and PURR SPRs

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Submitter Alexander Graf
Date Aug. 9, 2011, 4:31 p.m.
Message ID <1312907508-14599-9-git-send-email-agraf@suse.de>
Download mbox | patch
Permalink /patch/109251/
State Not Applicable
Headers show

Comments

Alexander Graf - Aug. 9, 2011, 4:31 p.m.
Recent Linux versions use the CFAR and PURR SPRs, but don't really care about
their contents (yet). So for now, we can simply return 0 when the guest wants
to read them.

Signed-off-by: Alexander Graf <agraf@suse.de>
---
 arch/powerpc/kvm/book3s_emulate.c |    4 ++++
 1 files changed, 4 insertions(+), 0 deletions(-)

Patch

diff --git a/arch/powerpc/kvm/book3s_emulate.c b/arch/powerpc/kvm/book3s_emulate.c
index bf0ddcd..0c9dc62 100644
--- a/arch/powerpc/kvm/book3s_emulate.c
+++ b/arch/powerpc/kvm/book3s_emulate.c
@@ -473,6 +473,10 @@  int kvmppc_core_emulate_mfspr(struct kvm_vcpu *vcpu, int sprn, int rt)
 	case SPRN_HID5:
 		kvmppc_set_gpr(vcpu, rt, to_book3s(vcpu)->hid[5]);
 		break;
+	case SPRN_CFAR:
+	case SPRN_PURR:
+		kvmppc_set_gpr(vcpu, rt, 0);
+		break;
 	case SPRN_GQR0:
 	case SPRN_GQR1:
 	case SPRN_GQR2: