[PATCH V2] powerpc/kvm/book3s_hv: propagate H_SET_MODE_RESOURCE_LE to the host

[Laurent Dufour]

Follow-up to Anton's H_SET_MODE patch, the host should be taken aware of
guest endianess change.

The hcall H_SET_MODE/H_SET_MODE_RESOURCE_LE is processed in kvm and then
propagated to the host.

v2: taking in account the Paul Mackerras's comment, using H_TOO_HARD to
propagate only H_SET_MODE_RESOURCE_LE to the host.

Signed-off-by: Laurent Dufour <ldufour at linux.vnet.ibm.com>
---
 arch/powerpc/kvm/book3s_hv.c |    6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/arch/powerpc/kvm/book3s_hv.c b/arch/powerpc/kvm/book3s_hv.c
index 998cad3..be0af39 100644
--- a/arch/powerpc/kvm/book3s_hv.c
+++ b/arch/powerpc/kvm/book3s_hv.c
@@ -523,14 +523,14 @@ static int kvmppc_h_set_mode(struct kvm_vcpu *vcpu, unsigned long mflags,
 			kvm_for_each_vcpu(n, v, kvm)
 				v->arch.intr_msr &= ~MSR_LE;
 			kick_all_cpus_sync();
-			return H_SUCCESS;
+			return H_TOO_HARD; /* propagating to the host */
 
 		case 1:
 			kvm->arch.lpcr |= LPCR_ILE;
 			kvm_for_each_vcpu(n, v, kvm)
 				v->arch.intr_msr |= MSR_LE;
 			kick_all_cpus_sync();
-			return H_SUCCESS;
+			return H_TOO_HARD; /* propagating to the host */
 
 		default:
 			return H_UNSUPPORTED_FLAG_START;
@@ -599,6 +599,8 @@ int kvmppc_pseries_do_hcall(struct kvm_vcpu *vcpu)
 					kvmppc_get_gpr(vcpu, 5),
 					kvmppc_get_gpr(vcpu, 6),
 					kvmppc_get_gpr(vcpu, 7));
+		if (ret == H_TOO_HARD)
+			return RESUME_HOST;
 		break;
 
 	case H_XIRR: