KVM: PPC: Book3S: Only report KVM_CAP_SPAPR_TCE_VFIO on powernv machines

[ Upstream commit 693ac10a88a2219bde553b2e8460dbec97e594e6 ]

The kvm capability KVM_CAP_SPAPR_TCE_VFIO is used to indicate the
availability of in kernel tce acceleration for vfio. However it is
currently the case that this is only available on a powernv machine,
not for a pseries machine.

Thus make this capability dependent on having the cpu feature
CPU_FTR_HVMODE.

[paulus@ozlabs.org - fixed compilation for Book E.]

Signed-off-by: Suraj Jitindar Singh <sjitindarsingh@gmail.com>
Signed-off-by: Paul Mackerras <paulus@ozlabs.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/arch/powerpc/kvm/powerpc.c b/arch/powerpc/kvm/powerpc.c
index ecb4536..a35995a 100644 (file)
--- a/arch/powerpc/kvm/powerpc.c
+++ b/arch/powerpc/kvm/powerpc.c
@@ -540,8 +540,11 @@ int kvm_vm_ioctl_check_extension(struct kvm *kvm, long ext)
 #ifdef CONFIG_PPC_BOOK3S_64
        case KVM_CAP_SPAPR_TCE:
        case KVM_CAP_SPAPR_TCE_64:
-               /* fallthrough */
+               r = 1;
+               break;
        case KVM_CAP_SPAPR_TCE_VFIO:
+               r = !!cpu_has_feature(CPU_FTR_HVMODE);
+               break;
        case KVM_CAP_PPC_RTAS:
        case KVM_CAP_PPC_FIXUP_HCALL:
        case KVM_CAP_PPC_ENABLE_HCALL: