[PATCH v4 08/27] KVM: arm64: Prepare sharing arm64 code with s390

[Steffen Eiden]

Mark functions that s390 can use to implement arm on s390 as shared
functions.

No functional change.

Signed-off-by: Steffen Eiden <seiden at linux.ibm.com>
---
 arch/arm64/kvm/arm.c         |  3 +++
 arch/arm64/kvm/guest.c       |  3 +++
 arch/arm64/kvm/handle_exit.c |  6 ++++++
 arch/arm64/kvm/mmio.c        | 14 ++++++++++++++
 arch/arm64/kvm/reset.c       |  3 +++
 5 files changed, 29 insertions(+)

diff --git a/arch/arm64/kvm/arm.c b/arch/arm64/kvm/arm.c
index 50adfff75be8..c992308b2dce 100644
--- a/arch/arm64/kvm/arm.c
+++ b/arch/arm64/kvm/arm.c
@@ -1580,6 +1580,7 @@ static unsigned long system_supported_vcpu_features(void)
 	return features;
 }
 
+#ifdef ARM64_S390_COMMON
 static int kvm_vcpu_init_check_features(struct kvm_vcpu *vcpu,
 					const struct kvm_vcpu_init *init)
 {
@@ -1628,6 +1629,8 @@ static bool kvm_vcpu_init_changed(struct kvm_vcpu *vcpu,
 			     KVM_VCPU_MAX_FEATURES);
 }
 
+#endif /* ARM64_S390_COMMON */
+
 static int kvm_setup_vcpu(struct kvm_vcpu *vcpu)
 {
 	struct kvm *kvm = vcpu->kvm;
diff --git a/arch/arm64/kvm/guest.c b/arch/arm64/kvm/guest.c
index b01d6622b872..5a202cfd27bc 100644
--- a/arch/arm64/kvm/guest.c
+++ b/arch/arm64/kvm/guest.c
@@ -543,6 +543,7 @@ int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs)
 	return -EINVAL;
 }
 
+#ifdef ARM64_S390_COMMON
 static int copy_core_reg_indices(const struct kvm_vcpu *vcpu,
 				 u64 __user *uindices)
 {
@@ -591,6 +592,8 @@ static unsigned long num_core_regs(const struct kvm_vcpu *vcpu)
 	return copy_core_reg_indices(vcpu, NULL);
 }
 
+#endif /* ARM64_S390_COMMON */
+
 static unsigned long num_sve_regs(const struct kvm_vcpu *vcpu)
 {
 	const unsigned int slices = vcpu_sve_slices(vcpu);
diff --git a/arch/arm64/kvm/handle_exit.c b/arch/arm64/kvm/handle_exit.c
index 54aedf93c78b..d511af145ee6 100644
--- a/arch/arm64/kvm/handle_exit.c
+++ b/arch/arm64/kvm/handle_exit.c
@@ -213,6 +213,7 @@ static int kvm_handle_guest_debug(struct kvm_vcpu *vcpu)
 	return 0;
 }
 
+#ifdef ARM64_S390_COMMON
 static int kvm_handle_unknown_ec(struct kvm_vcpu *vcpu)
 {
 	u64 esr = kvm_vcpu_get_esr(vcpu);
@@ -224,6 +225,8 @@ static int kvm_handle_unknown_ec(struct kvm_vcpu *vcpu)
 	return 1;
 }
 
+#endif /* ARM64_S390_COMMON */
+
 /*
  * Guest access to SVE registers should be routed to this handler only
  * when the system doesn't support SVE.
@@ -404,6 +407,7 @@ static exit_handle_fn arm_exit_handlers[] = {
 	[ESR_ELx_EC_GCS]	= kvm_handle_gcs,
 };
 
+#ifdef ARM64_S390_COMMON
 static exit_handle_fn kvm_get_exit_handler(struct kvm_vcpu *vcpu)
 {
 	u64 esr = kvm_vcpu_get_esr(vcpu);
@@ -439,6 +443,8 @@ static int handle_trap_exceptions(struct kvm_vcpu *vcpu)
 	return handled;
 }
 
+#endif /* ARM64_S390_COMMON */
+
 /*
  * Return > 0 to return to guest, < 0 on error, 0 (and set exit_reason) on
  * proper exit to userspace.
diff --git a/arch/arm64/kvm/mmio.c b/arch/arm64/kvm/mmio.c
index e2285ed8c91d..876d56dd5b64 100644
--- a/arch/arm64/kvm/mmio.c
+++ b/arch/arm64/kvm/mmio.c
@@ -10,6 +10,7 @@
 
 #include "trace.h"
 
+#ifdef ARM64_S390_COMMON
 void kvm_mmio_write_buf(void *buf, unsigned int len, unsigned long data)
 {
 	void *datap = NULL;
@@ -135,8 +136,11 @@ int kvm_handle_mmio_return(struct kvm_vcpu *vcpu)
 		if (!kvm_vcpu_dabt_issf(vcpu))
 			data = data & 0xffffffff;
 
+#endif /* ARM64_S390_COMMON */
 		trace_kvm_mmio(KVM_TRACE_MMIO_READ, len, run->mmio.phys_addr,
 			       &data);
+		//TODO  tracing
+#ifdef ARM64_S390_COMMON
 		data = vcpu_data_host_to_guest(vcpu, data, len);
 		vcpu_set_reg(vcpu, kvm_vcpu_dabt_get_rd(vcpu), data);
 	}
@@ -171,8 +175,11 @@ int io_mem_abort(struct kvm_vcpu *vcpu, phys_addr_t fault_ipa)
 	 * though, so directly deliver an exception to the guest.
 	 */
 	if (!kvm_vcpu_dabt_isvalid(vcpu)) {
+#endif /* ARM64_S390_COMMON */
 		trace_kvm_mmio_nisv(*vcpu_pc(vcpu), esr,
 				    kvm_vcpu_get_hfar(vcpu), fault_ipa);
+		//TODO tracing
+#ifdef ARM64_S390_COMMON
 
 		if (vcpu_is_protected(vcpu))
 			return kvm_inject_sea_dabt(vcpu, kvm_vcpu_get_hfar(vcpu));
@@ -223,14 +230,20 @@ int io_mem_abort(struct kvm_vcpu *vcpu, phys_addr_t fault_ipa)
 		data = vcpu_data_guest_to_host(vcpu, vcpu_get_reg(vcpu, rt),
 					       len);
 
+#endif /* ARM64_S390_COMMON */
 		trace_kvm_mmio(KVM_TRACE_MMIO_WRITE, len, fault_ipa, &data);
+	//TODO tracing
+#ifdef ARM64_S390_COMMON
 		kvm_mmio_write_buf(data_buf, len, data);
 
 		ret = kvm_io_bus_write(vcpu, KVM_MMIO_BUS, fault_ipa, len,
 				       data_buf);
 	} else {
+#endif /* ARM64_S390_COMMON */
 		trace_kvm_mmio(KVM_TRACE_MMIO_READ_UNSATISFIED, len,
 			       fault_ipa, NULL);
+	//TODO tracing
+#ifdef ARM64_S390_COMMON
 
 		ret = kvm_io_bus_read(vcpu, KVM_MMIO_BUS, fault_ipa, len,
 				      data_buf);
@@ -257,3 +270,4 @@ int io_mem_abort(struct kvm_vcpu *vcpu, phys_addr_t fault_ipa)
 	run->exit_reason	= KVM_EXIT_MMIO;
 	return 0;
 }
+#endif /* ARM64_S390_COMMON */
diff --git a/arch/arm64/kvm/reset.c b/arch/arm64/kvm/reset.c
index b963fd975aac..faab6f03f365 100644
--- a/arch/arm64/kvm/reset.c
+++ b/arch/arm64/kvm/reset.c
@@ -34,6 +34,7 @@
 static u32 __ro_after_init kvm_ipa_limit;
 unsigned int __ro_after_init kvm_host_sve_max_vl;
 
+#ifdef ARM64_S390_COMMON
 /*
  * ARMv8 Reset Values
  */
@@ -46,6 +47,8 @@ unsigned int __ro_after_init kvm_host_sve_max_vl;
 #define VCPU_RESET_PSTATE_SVC	(PSR_AA32_MODE_SVC | PSR_AA32_A_BIT | \
 				 PSR_AA32_I_BIT | PSR_AA32_F_BIT)
 
+#endif /* ARM64_S390_COMMON */
+
 unsigned int __ro_after_init kvm_sve_max_vl;
 
 int __init kvm_arm_init_sve(void)
-- 
2.53.0