KVM: arm64: Remove internal accessor helpers for id regs

The internal accessors are only ever called once. Dump out their
contents in the caller.

No functional change intended.
Signed-off-by: Oliver Upton <oliver.upton@linux.dev>
Reviewed-by: Reiji Watanabe <reijiw@google.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20220913094441.3957645-3-oliver.upton@linux.dev

arch/arm64/kvm/sys_regs.c

@@ -1153,25 +1153,17 @@ static unsigned int raz_visibility(const struct kvm_vcpu *vcpu,
 
 /* cpufeature ID register access trap handlers */
 
-static bool __access_id_reg(struct kvm_vcpu *vcpu,
-			    struct sys_reg_params *p,
-			    const struct sys_reg_desc *r,
-			    bool raz)
-{
-	if (p->is_write)
-		return write_to_read_only(vcpu, p, r);
-
-	p->regval = read_id_reg(vcpu, r, raz);
-	return true;
-}
-
 static bool access_id_reg(struct kvm_vcpu *vcpu,
 			  struct sys_reg_params *p,
 			  const struct sys_reg_desc *r)
 {
 	bool raz = sysreg_visible_as_raz(vcpu, r);
 
-	return __access_id_reg(vcpu, p, r, raz);
+	if (p->is_write)
+		return write_to_read_only(vcpu, p, r);
+
+	p->regval = read_id_reg(vcpu, r, raz);
+	return true;
 }
 
 /* Visibility overrides for SVE-specific control registers */
@@ -1226,31 +1218,13 @@ static int set_id_aa64pfr0_el1(struct kvm_vcpu *vcpu,
  * are stored, and for set_id_reg() we don't allow the effective value
  * to be changed.
  */
-static int __get_id_reg(const struct kvm_vcpu *vcpu,
-			const struct sys_reg_desc *rd, u64 *val,
-			bool raz)
-{
-	*val = read_id_reg(vcpu, rd, raz);
-	return 0;
-}
-
-static int __set_id_reg(const struct kvm_vcpu *vcpu,
-			const struct sys_reg_desc *rd, u64 val,
-			bool raz)
-{
-	/* This is what we mean by invariant: you can't change it. */
-	if (val != read_id_reg(vcpu, rd, raz))
-		return -EINVAL;
-
-	return 0;
-}
-
 static int get_id_reg(struct kvm_vcpu *vcpu, const struct sys_reg_desc *rd,
 		      u64 *val)
 {
 	bool raz = sysreg_visible_as_raz(vcpu, rd);
 
-	return __get_id_reg(vcpu, rd, val, raz);
+	*val = read_id_reg(vcpu, rd, raz);
+	return 0;
 }
 
 static int set_id_reg(struct kvm_vcpu *vcpu, const struct sys_reg_desc *rd,
@@ -1258,7 +1232,11 @@ static int set_id_reg(struct kvm_vcpu *vcpu, const struct sys_reg_desc *rd,
 {
 	bool raz = sysreg_visible_as_raz(vcpu, rd);
 
-	return __set_id_reg(vcpu, rd, val, raz);
+	/* This is what we mean by invariant: you can't change it. */
+	if (val != read_id_reg(vcpu, rd, raz))
+		return -EINVAL;
+
+	return 0;
 }
 
 static int get_raz_reg(struct kvm_vcpu *vcpu, const struct sys_reg_desc *rd,