RISC-V: KVM: Add in-kernel emulation of AIA APLIC

There is no virtualization support in AIA APLIC so we add in-kernel
emulation of AIA APLIC which only supports MSI-mode (i.e. wired
interrupts forwarded to AIA IMSIC as MSIs).
Signed-off-by: Anup Patel <apatel@ventanamicro.com>
Reviewed-by: Atish Patra <atishp@rivosinc.com>
Signed-off-by: Anup Patel <anup@brainfault.org>

arch/riscv/include/asm/kvm_aia.h

@@ -129,20 +129,9 @@ static inline void kvm_riscv_vcpu_aia_imsic_cleanup(struct kvm_vcpu *vcpu)
 {
 }
 
-static inline int kvm_riscv_aia_aplic_inject(struct kvm *kvm,
-					     u32 source, bool level)
-{
-	return 0;
-}
-
-static inline int kvm_riscv_aia_aplic_init(struct kvm *kvm)
-{
-	return 0;
-}
-
-static inline void kvm_riscv_aia_aplic_cleanup(struct kvm *kvm)
-{
-}
+int kvm_riscv_aia_aplic_inject(struct kvm *kvm, u32 source, bool level);
+int kvm_riscv_aia_aplic_init(struct kvm *kvm);
+void kvm_riscv_aia_aplic_cleanup(struct kvm *kvm);
 
 #ifdef CONFIG_32BIT
 void kvm_riscv_vcpu_aia_flush_interrupts(struct kvm_vcpu *vcpu);

arch/riscv/kvm/Makefile

@@ -28,3 +28,4 @@ kvm-y += vcpu_timer.o
 kvm-$(CONFIG_RISCV_PMU_SBI) += vcpu_pmu.o vcpu_sbi_pmu.o
 kvm-y += aia.o
 kvm-y += aia_device.o
+kvm-y += aia_aplic.o