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 <[email protected]> Reviewed-by: Atish Patra <[email protected]> Signed-off-by: Anup Patel <[email protected]>
niw · Jun 18, 2023 · 74967aa · 74967aa
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commit 74967aa
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Showing 3 changed files with 580 additions and 14 deletions.
diff --git a/arch/riscv/include/asm/kvm_aia.h b/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);

diff --git a/arch/riscv/kvm/Makefile b/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