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[RFCv2,17/25] powerpc/kvm: Advertise availablity of HPT resizing on KVM HV

Message ID 1457406542-6210-18-git-send-email-david@gibson.dropbear.id.au (mailing list archive)
State RFC
Headers show

Commit Message

David Gibson March 8, 2016, 3:08 a.m. UTC
This updates the KVM_CAP_SPAPR_RESIZE_HPT capability to advertise the
presence of in-kernel HPT resizing on KVM HV.  In fact the HPT resizing
isn't fully implemented, but this allows us to experiment with what's
there.

Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
---
 arch/powerpc/kvm/powerpc.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)
diff mbox

Patch

diff --git a/arch/powerpc/kvm/powerpc.c b/arch/powerpc/kvm/powerpc.c
index eeda4a8..2314059 100644
--- a/arch/powerpc/kvm/powerpc.c
+++ b/arch/powerpc/kvm/powerpc.c
@@ -573,7 +573,10 @@  int kvm_vm_ioctl_check_extension(struct kvm *kvm, long ext)
 		r = 1;
 		break;
 	case KVM_CAP_SPAPR_RESIZE_HPT:
-		r = 1; /* resize allowed only if HPT is outside kernel */
+		if (hv_enabled)
+			r = 2; /* In-kernel resize implementation */
+		else
+			r = 1; /* outside kernel resize allowed */
 		break;
 #endif
 	default: