From: Alexander Graf <agraf@suse.de>
Date: Mon, 13 Aug 2012 10:50:35 +0000 (+0200)
Subject: KVM: PPC: Add return value to core_check_requests
X-Git-Tag: next-20120925~30^2~18
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=97c532a5e5b14640fe274c27aed364e9611f0c12;p=karo-tx-linux.git

KVM: PPC: Add return value to core_check_requests

Requests may want to tell us that we need to go back into host state,
so add a return value for the checks.

Signed-off-by: Alexander Graf <agraf@suse.de>
---

diff --git a/arch/powerpc/include/asm/kvm_ppc.h b/arch/powerpc/include/asm/kvm_ppc.h
index 545936428bf6..3dfc437fb9d9 100644
--- a/arch/powerpc/include/asm/kvm_ppc.h
+++ b/arch/powerpc/include/asm/kvm_ppc.h
@@ -112,7 +112,7 @@ extern int kvmppc_core_emulate_mtspr(struct kvm_vcpu *vcpu, int sprn,
 				     ulong val);
 extern int kvmppc_core_emulate_mfspr(struct kvm_vcpu *vcpu, int sprn,
 				     ulong *val);
-extern void kvmppc_core_check_requests(struct kvm_vcpu *vcpu);
+extern int kvmppc_core_check_requests(struct kvm_vcpu *vcpu);
 
 extern int kvmppc_booke_init(void);
 extern void kvmppc_booke_exit(void);
diff --git a/arch/powerpc/kvm/book3s_pr.c b/arch/powerpc/kvm/book3s_pr.c
index 71fa0f1873b3..b3c584f94cb3 100644
--- a/arch/powerpc/kvm/book3s_pr.c
+++ b/arch/powerpc/kvm/book3s_pr.c
@@ -86,12 +86,16 @@ void kvmppc_core_vcpu_put(struct kvm_vcpu *vcpu)
 	kvmppc_giveup_ext(vcpu, MSR_VSX);
 }
 
-void kvmppc_core_check_requests(struct kvm_vcpu *vcpu)
+int kvmppc_core_check_requests(struct kvm_vcpu *vcpu)
 {
+	int r = 1; /* Indicate we want to get back into the guest */
+
 	/* We misuse TLB_FLUSH to indicate that we want to clear
 	   all shadow cache entries */
 	if (kvm_check_request(KVM_REQ_TLB_FLUSH, vcpu))
 		kvmppc_mmu_pte_flush(vcpu, 0, 0);
+
+	return r;
 }
 
 /************* MMU Notifiers *************/
diff --git a/arch/powerpc/kvm/booke.c b/arch/powerpc/kvm/booke.c
index 1917802463f5..c36493087dbf 100644
--- a/arch/powerpc/kvm/booke.c
+++ b/arch/powerpc/kvm/booke.c
@@ -455,14 +455,18 @@ int kvmppc_core_prepare_to_enter(struct kvm_vcpu *vcpu)
 	return r;
 }
 
-void kvmppc_core_check_requests(struct kvm_vcpu *vcpu)
+int kvmppc_core_check_requests(struct kvm_vcpu *vcpu)
 {
+	int r = 1; /* Indicate we want to get back into the guest */
+
 	if (kvm_check_request(KVM_REQ_PENDING_TIMER, vcpu))
 		update_timer_ints(vcpu);
 #if defined(CONFIG_KVM_E500V2) || defined(CONFIG_KVM_E500MC)
 	if (kvm_check_request(KVM_REQ_TLB_FLUSH, vcpu))
 		kvmppc_core_flush_tlb(vcpu);
 #endif
+
+	return r;
 }
 
 int kvmppc_vcpu_run(struct kvm_run *kvm_run, struct kvm_vcpu *vcpu)
diff --git a/arch/powerpc/kvm/powerpc.c b/arch/powerpc/kvm/powerpc.c
index 0e2a98ab6a77..54b12af577d0 100644
--- a/arch/powerpc/kvm/powerpc.c
+++ b/arch/powerpc/kvm/powerpc.c
@@ -83,9 +83,11 @@ int kvmppc_prepare_to_enter(struct kvm_vcpu *vcpu)
 			/* Make sure we process requests preemptable */
 			local_irq_enable();
 			trace_kvm_check_requests(vcpu);
-			kvmppc_core_check_requests(vcpu);
+			r = kvmppc_core_check_requests(vcpu);
 			local_irq_disable();
-			continue;
+			if (r > 0)
+				continue;
+			break;
 		}
 
 		if (kvmppc_core_prepare_to_enter(vcpu)) {