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 <anup.patel@wdc.com>
avpatel · Dec 6, 2021 · dc0299fdaf9714a56b13b955c086bab2f8bd4046 · dc0299f
1 parent c72c564
commit dc0299fdaf9714a56b13b955c086bab2f8bd4046
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Showing 3 changed files with 553 additions and 14 deletions.
diff --git a/arch/riscv/include/asm/kvm_aia.h b/arch/riscv/include/asm/kvm_aia.h
@@ -112,20 +112,9 @@ 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_64BIT
 static inline void kvm_riscv_vcpu_aia_flush_interrupts(struct kvm_vcpu *vcpu)

diff --git a/arch/riscv/kvm/Makefile b/arch/riscv/kvm/Makefile
@@ -31,3 +31,4 @@ kvm-y += vcpu_sbi_hsm.o
 kvm-y += vcpu_timer.o
 kvm-y += aia.o
 kvm-y += aia_device.o
+kvm-y += aia_aplic.o