KVM: s390: introduce kvm_s390_fpu_(store|load)

It's a bit nicer than having multiple lines and will help if there's
another re-work since we'll only have to change one location.
Signed-off-by: Janosch Frank <frankja@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>

arch/s390/kvm/interrupt.c

@@ -584,11 +584,7 @@ static int __write_machine_check(struct kvm_vcpu *vcpu,
 
 	mci.val = mchk->mcic;
 	/* take care of lazy register loading */
-	fpu_stfpc(&vcpu->run->s.regs.fpc);
-	if (cpu_has_vx())
-		save_vx_regs((__vector128 *)&vcpu->run->s.regs.vrs);
-	else
-		save_fp_regs((freg_t *)&vcpu->run->s.regs.fprs);
+	kvm_s390_fpu_store(vcpu->run);
 	save_access_regs(vcpu->run->s.regs.acrs);
 	if (MACHINE_HAS_GS && vcpu->arch.gs_enabled)
 		save_gs_cb(current->thread.gs_cb);

arch/s390/kvm/kvm-s390.c

@@ -4949,11 +4949,7 @@ static void sync_regs(struct kvm_vcpu *vcpu)
 	}
 	save_access_regs(vcpu->arch.host_acrs);
 	restore_access_regs(vcpu->run->s.regs.acrs);
-	fpu_lfpc_safe(&vcpu->run->s.regs.fpc);
-	if (cpu_has_vx())
-		load_vx_regs((__vector128 *)&vcpu->run->s.regs.vrs);
-	else
-		load_fp_regs((freg_t *)&vcpu->run->s.regs.fprs);
+	kvm_s390_fpu_load(vcpu->run);
 	/* Sync fmt2 only data */
 	if (likely(!kvm_s390_pv_cpu_is_protected(vcpu))) {
 		sync_regs_fmt2(vcpu);
@@ -5014,11 +5010,7 @@ static void store_regs(struct kvm_vcpu *vcpu)
 	kvm_run->s.regs.pfc = vcpu->arch.pfault_compare;
 	save_access_regs(vcpu->run->s.regs.acrs);
 	restore_access_regs(vcpu->arch.host_acrs);
-	fpu_stfpc(&vcpu->run->s.regs.fpc);
-	if (cpu_has_vx())
-		save_vx_regs((__vector128 *)&vcpu->run->s.regs.vrs);
-	else
-		save_fp_regs((freg_t *)&vcpu->run->s.regs.fprs);
+	kvm_s390_fpu_store(vcpu->run);
 	if (likely(!kvm_s390_pv_cpu_is_protected(vcpu)))
 		store_regs_fmt2(vcpu);
 }
@@ -5167,11 +5159,7 @@ int kvm_s390_vcpu_store_status(struct kvm_vcpu *vcpu, unsigned long addr)
 	 * switch in the run ioctl. Let's update our copies before we save
 	 * it into the save area
 	 */
-	fpu_stfpc(&vcpu->run->s.regs.fpc);
-	if (cpu_has_vx())
-		save_vx_regs((__vector128 *)&vcpu->run->s.regs.vrs);
-	else
-		save_fp_regs((freg_t *)&vcpu->run->s.regs.fprs);
+	kvm_s390_fpu_store(vcpu->run);
 	save_access_regs(vcpu->run->s.regs.acrs);
 
 	return kvm_s390_store_status_unloaded(vcpu, addr);

arch/s390/kvm/kvm-s390.h

@@ -20,6 +20,24 @@
 #include <asm/processor.h>
 #include <asm/sclp.h>
 
+static inline void kvm_s390_fpu_store(struct kvm_run *run)
+{
+	fpu_stfpc(&run->s.regs.fpc);
+	if (cpu_has_vx())
+		save_vx_regs((__vector128 *)&run->s.regs.vrs);
+	else
+		save_fp_regs((freg_t *)&run->s.regs.fprs);
+}
+
+static inline void kvm_s390_fpu_load(struct kvm_run *run)
+{
+	fpu_lfpc_safe(&run->s.regs.fpc);
+	if (cpu_has_vx())
+		load_vx_regs((__vector128 *)&run->s.regs.vrs);
+	else
+		load_fp_regs((freg_t *)&run->s.regs.fprs);
+}
+
 /* Transactional Memory Execution related macros */
 #define IS_TE_ENABLED(vcpu)	((vcpu->arch.sie_block->ecb & ECB_TE))
 #define TDB_FORMAT1		1