[PATCH v4 10/27] KVM: arm64: Refactor core-reset into a separate function

[Steffen Eiden]

Move the reset of the arm core register into a separate function and
share it with s390.

No functional change.

Signed-off-by: Steffen Eiden <seiden at linux.ibm.com>
---
 arch/arm64/kvm/reset.c | 45 ++++++++++++++++++++++++++----------------
 1 file changed, 28 insertions(+), 17 deletions(-)

diff --git a/arch/arm64/kvm/reset.c b/arch/arm64/kvm/reset.c
index 1ce3b26cc1ae..81d9f0faede2 100644
--- a/arch/arm64/kvm/reset.c
+++ b/arch/arm64/kvm/reset.c
@@ -172,6 +172,33 @@ static void kvm_vcpu_reset_sve(struct kvm_vcpu *vcpu)
 		memset(vcpu->arch.sve_state, 0, vcpu_sve_state_size(vcpu));
 }
 
+#ifdef ARM64_S390_COMMON
+static void kvm_reset_vcpu_core_regs(struct kvm_vcpu *vcpu)
+{
+	u32 pstate;
+
+	if (vcpu_el1_is_32bit(vcpu))
+		pstate = VCPU_RESET_PSTATE_SVC;
+	else if (vcpu_has_nv(vcpu))
+		pstate = VCPU_RESET_PSTATE_EL2;
+	else
+		pstate = VCPU_RESET_PSTATE_EL1;
+
+	memset(vcpu_gp_regs(vcpu), 0, sizeof(vcpu_gp_regs(vcpu)));
+	*vcpu_pc(vcpu) = 0;
+	*vcpu_sp_el0(vcpu) = 0;
+	memset(kvm_vcpu_get_vregs(vcpu), 0, sizeof(*kvm_vcpu_get_vregs(vcpu)));
+	memset(kvm_vcpu_get_fpsr(vcpu), 0, sizeof(*kvm_vcpu_get_fpsr(vcpu)));
+	memset(kvm_vcpu_get_fpcr(vcpu), 0, sizeof(*kvm_vcpu_get_fpcr(vcpu)));
+	vcpu->arch.ctxt.spsr_abt = 0;
+	vcpu->arch.ctxt.spsr_und = 0;
+	vcpu->arch.ctxt.spsr_irq = 0;
+	vcpu->arch.ctxt.spsr_fiq = 0;
+	*vcpu_cpsr(vcpu) = pstate;
+}
+
+#endif /* ARM64_S390_COMMON */
+
 /**
  * kvm_reset_vcpu - sets core registers and sys_regs to reset value
  * @vcpu: The VCPU pointer
@@ -194,7 +221,6 @@ void kvm_reset_vcpu(struct kvm_vcpu *vcpu)
 {
 	struct vcpu_reset_state reset_state;
 	bool loaded;
-	u32 pstate;
 
 	spin_lock(&vcpu->arch.mp_state_lock);
 	reset_state = vcpu->arch.reset_state;
@@ -213,23 +239,8 @@ void kvm_reset_vcpu(struct kvm_vcpu *vcpu)
 		kvm_vcpu_reset_sve(vcpu);
 	}
 
-	if (vcpu_el1_is_32bit(vcpu))
-		pstate = VCPU_RESET_PSTATE_SVC;
-	else if (vcpu_has_nv(vcpu))
-		pstate = VCPU_RESET_PSTATE_EL2;
-	else
-		pstate = VCPU_RESET_PSTATE_EL1;
-
 	/* Reset core registers */
-	memset(vcpu_gp_regs(vcpu), 0, sizeof(vcpu_gp_regs(vcpu)));
-	*vcpu_pc(vcpu) = 0;
-	*vcpu_sp_el0(vcpu) = 0;
-	memset(&vcpu->arch.ctxt.fp_regs, 0, sizeof(vcpu->arch.ctxt.fp_regs));
-	vcpu->arch.ctxt.spsr_abt = 0;
-	vcpu->arch.ctxt.spsr_und = 0;
-	vcpu->arch.ctxt.spsr_irq = 0;
-	vcpu->arch.ctxt.spsr_fiq = 0;
-	*vcpu_cpsr(vcpu) = pstate;
+	kvm_reset_vcpu_core_regs(vcpu);
 
 	/* Reset system registers */
 	kvm_reset_sys_regs(vcpu);
-- 
2.53.0