[PATCH v5 12/31] KVM: arm64: Share arm64 code with s390

[Steffen Eiden <seiden@linux.ibm.com>]

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

No functional change.

Signed-off-by: Steffen Eiden <seiden@linux.ibm.com>
---
 arch/arm64/kvm/arm.c         | 3 +++
 arch/arm64/kvm/guest.c       | 6 ++++++
 arch/arm64/kvm/handle_exit.c | 6 ++++++
 arch/arm64/kvm/mmio.c        | 2 ++
 arch/arm64/kvm/reset.c       | 6 ++++++
 5 files changed, 23 insertions(+)

diff --git a/arch/arm64/kvm/arm.c b/arch/arm64/kvm/arm.c
index 9a6c72a18672..2d2e7498be88 100644
--- a/arch/arm64/kvm/arm.c
+++ b/arch/arm64/kvm/arm.c
@@ -1593,6 +1593,7 @@ 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)
 {
@@ -1641,6 +1642,8 @@ 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 02eca05ef572..df1f78ff1044 100644
--- a/arch/arm64/kvm/guest.c
+++ b/arch/arm64/kvm/guest.c
@@ -62,6 +62,7 @@ const struct kvm_stats_header kvm_vcpu_stats_header = {
 		       sizeof(kvm_vcpu_stats_desc),
 };
 
+#ifdef ARM64_S390_COMMON
 static bool core_reg_offset_is_vreg(u64 off)
 {
 	return off >= KVM_REG_ARM_CORE_REG(fp_regs.vregs) &&
@@ -306,6 +307,8 @@ static int set_core_reg(struct kvm_vcpu *vcpu, const struct kvm_one_reg *reg)
 	return err;
 }
 
+#endif /* ARM64_S390_COMMON */
+
 #define vq_word(vq) (((vq) - SVE_VQ_MIN) / 64)
 #define vq_mask(vq) ((u64)1 << ((vq) - SVE_VQ_MIN) % 64)
 #define vq_present(vqs, vq) (!!((vqs)[vq_word(vq)] & vq_mask(vq)))
@@ -543,6 +546,7 @@ 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 +595,8 @@ 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 d1c3a352d5a2..5161102da507 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;
@@ -258,3 +259,4 @@ 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 727abbff2b6a..81d9f0faede2 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)
@@ -169,6 +172,7 @@ 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;
@@ -193,6 +197,8 @@ static void kvm_reset_vcpu_core_regs(struct kvm_vcpu *vcpu)
 	*vcpu_cpsr(vcpu) = pstate;
 }
 
+#endif /* ARM64_S390_COMMON */
+
 /**
  * kvm_reset_vcpu - sets core registers and sys_regs to reset value
  * @vcpu: The VCPU pointer
-- 
2.53.0