KVM: arm64: Rename __check_nv_sr_forward() to triage_sysreg_trap()

__check_nv_sr_forward() is not specific to NV anymore, and does
a lot more. Rename it to triage_sysreg_trap(), making it plain
that its role is to handle where an exception is to be handled.
Reviewed-by: Joey Gouly <joey.gouly@arm.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20240214131827.2856277-17-maz@kernel.orgSigned-off-by: Oliver Upton <oliver.upton@linux.dev>

arch/arm64/include/asm/kvm_nested.h

@@ -60,7 +60,6 @@ static inline u64 translate_ttbr0_el2_to_ttbr0_el1(u64 ttbr0)
 	return ttbr0 & ~GENMASK_ULL(63, 48);
 }
 
-extern bool __check_nv_sr_forward(struct kvm_vcpu *vcpu, int *sr_idx);
 
 int kvm_init_nv_sysregs(struct kvm *kvm);
 

arch/arm64/kvm/emulate-nested.c

@@ -2007,7 +2007,7 @@ static bool check_fgt_bit(struct kvm *kvm, bool is_read,
 	return !(kvm_get_sysreg_res0(kvm, sr) & BIT(tc.bit));
 }
 
-bool __check_nv_sr_forward(struct kvm_vcpu *vcpu, int *sr_index)
+bool triage_sysreg_trap(struct kvm_vcpu *vcpu, int *sr_index)
 {
 	union trap_config tc;
 	enum trap_behaviour b;

arch/arm64/kvm/sys_regs.c

@@ -3482,7 +3482,7 @@ int kvm_handle_sys_reg(struct kvm_vcpu *vcpu)
 
 	trace_kvm_handle_sys_reg(esr);
 
-	if (__check_nv_sr_forward(vcpu, &sr_idx))
+	if (triage_sysreg_trap(vcpu, &sr_idx))
 		return 1;
 
 	params = esr_sys64_to_params(esr);

arch/arm64/kvm/sys_regs.h

@@ -233,6 +233,8 @@ int kvm_sys_reg_get_user(struct kvm_vcpu *vcpu, const struct kvm_one_reg *reg,
 int kvm_sys_reg_set_user(struct kvm_vcpu *vcpu, const struct kvm_one_reg *reg,
 			 const struct sys_reg_desc table[], unsigned int num);
 
+bool triage_sysreg_trap(struct kvm_vcpu *vcpu, int *sr_index);
+
 #define AA32(_x)	.aarch32_map = AA32_##_x
 #define Op0(_x) 	.Op0 = _x
 #define Op1(_x) 	.Op1 = _x