s390/kvm: Remove kvm_arch_fault_in_page()

kvm_arch_fault_in_page() is a useless wrapper around gmap_fault(); just
use gmap_fault() directly instead.

Signed-off-by: Claudio Imbrenda <imbrenda@linux.ibm.com>
Reviewed-by: Janosch Frank <frankja@linux.ibm.com>
Link: https://lore.kernel.org/r/20241022120601.167009-3-imbrenda@linux.ibm.com
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>

Author: Claudio Imbrenda

arch/s390/kvm/intercept.c

@@ -367,7 +367,7 @@ static int handle_mvpg_pei(struct kvm_vcpu *vcpu)
 					      reg2, &srcaddr, GACC_FETCH, 0);
 	if (rc)
 		return kvm_s390_inject_prog_cond(vcpu, rc);
-	rc = kvm_arch_fault_in_page(vcpu, srcaddr, 0);
+	rc = gmap_fault(vcpu->arch.gmap, srcaddr, 0);
 	if (rc != 0)
 		return rc;
 
@@ -376,7 +376,7 @@ static int handle_mvpg_pei(struct kvm_vcpu *vcpu)
 					      reg1, &dstaddr, GACC_STORE, 0);
 	if (rc)
 		return kvm_s390_inject_prog_cond(vcpu, rc);
-	rc = kvm_arch_fault_in_page(vcpu, dstaddr, 1);
+	rc = gmap_fault(vcpu->arch.gmap, dstaddr, FAULT_FLAG_WRITE);
 	if (rc != 0)
 		return rc;
 

arch/s390/kvm/kvm-s390.c

@@ -4579,22 +4579,6 @@ int kvm_s390_try_set_tod_clock(struct kvm *kvm, const struct kvm_s390_vm_tod_clo
 	return 1;
 }
 
-/**
- * kvm_arch_fault_in_page - fault-in guest page if necessary
- * @vcpu: The corresponding virtual cpu
- * @gpa: Guest physical address
- * @writable: Whether the page should be writable or not
- *
- * Make sure that a guest page has been faulted-in on the host.
- *
- * Return: Zero on success, negative error code otherwise.
- */
-long kvm_arch_fault_in_page(struct kvm_vcpu *vcpu, gpa_t gpa, int writable)
-{
-	return gmap_fault(vcpu->arch.gmap, gpa,
-			  writable ? FAULT_FLAG_WRITE : 0);
-}
-
 static void __kvm_inject_pfault_token(struct kvm_vcpu *vcpu, bool start_token,
 				      unsigned long token)
 {
@@ -4797,7 +4781,7 @@ static int vcpu_post_run(struct kvm_vcpu *vcpu, int exit_reason)
 		if (kvm_arch_setup_async_pf(vcpu))
 			return 0;
 		vcpu->stat.pfault_sync++;
-		return kvm_arch_fault_in_page(vcpu, current->thread.gmap_addr, 1);
+		return gmap_fault(vcpu->arch.gmap, current->thread.gmap_addr, FAULT_FLAG_WRITE);
 	}
 	return vcpu_post_run_fault_in_sie(vcpu);
 }

arch/s390/kvm/kvm-s390.h

@@ -394,7 +394,6 @@ int kvm_s390_handle_sigp_pei(struct kvm_vcpu *vcpu);
 
 /* implemented in kvm-s390.c */
 int kvm_s390_try_set_tod_clock(struct kvm *kvm, const struct kvm_s390_vm_tod_clock *gtod);
-long kvm_arch_fault_in_page(struct kvm_vcpu *vcpu, gpa_t gpa, int writable);
 int kvm_s390_store_status_unloaded(struct kvm_vcpu *vcpu, unsigned long addr);
 int kvm_s390_vcpu_store_status(struct kvm_vcpu *vcpu, unsigned long addr);
 int kvm_s390_vcpu_start(struct kvm_vcpu *vcpu);