Commit db8b7e97 authored by Anup Patel's avatar Anup Patel Committed by Anup Patel
Browse files

RISC-V: KVM: Add in-kernel virtualization of AIA IMSIC 



We can have AIA IMSIC support for both HS-level and VS-level but
the VS-level IMSICs are optional. We use the VS-level IMSICs for
Guest/VM whenever available otherwise we fallback to software
emulation of AIA IMSIC.

This patch adds in-kernel virtualization of AIA IMSIC.

Signed-off-by: default avatarAnup Patel <apatel@ventanamicro.com>
Reviewed-by: default avatarAtish Patra <atishp@rivosinc.com>
Signed-off-by: default avatarAnup Patel <anup@brainfault.org>
parent 289a007b

arch/riscv/include/asm/kvm_aia.h

+10 −36
Original line number Diff line number Diff line
@@ -90,44 +90,18 @@ DECLARE_STATIC_KEY_FALSE(kvm_riscv_aia_available); 


extern struct kvm_device_ops kvm_riscv_aia_device_ops;



static inline void kvm_riscv_vcpu_aia_imsic_release(struct kvm_vcpu *vcpu)

{

}



static inline int kvm_riscv_vcpu_aia_imsic_update(struct kvm_vcpu *vcpu)

{

	return 1;

}

void kvm_riscv_vcpu_aia_imsic_release(struct kvm_vcpu *vcpu);

int kvm_riscv_vcpu_aia_imsic_update(struct kvm_vcpu *vcpu);



#define KVM_RISCV_AIA_IMSIC_TOPEI	(ISELECT_MASK + 1)

static inline int kvm_riscv_vcpu_aia_imsic_rmw(struct kvm_vcpu *vcpu,

					       unsigned long isel,

					       unsigned long *val,

					       unsigned long new_val,

					       unsigned long wr_mask)

{

	return 0;

}



static inline void kvm_riscv_vcpu_aia_imsic_reset(struct kvm_vcpu *vcpu)

{

}



static inline int kvm_riscv_vcpu_aia_imsic_inject(struct kvm_vcpu *vcpu,

						  u32 guest_index, u32 offset,

						  u32 iid)

{

	return 0;

}



static inline int kvm_riscv_vcpu_aia_imsic_init(struct kvm_vcpu *vcpu)

{

	return 0;

}



static inline void kvm_riscv_vcpu_aia_imsic_cleanup(struct kvm_vcpu *vcpu)

{

}

int kvm_riscv_vcpu_aia_imsic_rmw(struct kvm_vcpu *vcpu, unsigned long isel,

				 unsigned long *val, unsigned long new_val,

				 unsigned long wr_mask);

void kvm_riscv_vcpu_aia_imsic_reset(struct kvm_vcpu *vcpu);

int kvm_riscv_vcpu_aia_imsic_inject(struct kvm_vcpu *vcpu,

				    u32 guest_index, u32 offset, u32 iid);

int kvm_riscv_vcpu_aia_imsic_init(struct kvm_vcpu *vcpu);

void kvm_riscv_vcpu_aia_imsic_cleanup(struct kvm_vcpu *vcpu);



int kvm_riscv_aia_aplic_set_attr(struct kvm *kvm, unsigned long type, u32 v);

int kvm_riscv_aia_aplic_get_attr(struct kvm *kvm, unsigned long type, u32 *v);

arch/riscv/kvm/Makefile

+1 −0
Original line number Diff line number Diff line
@@ -29,3 +29,4 @@ 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

kvm-y += aia_imsic.o

arch/riscv/kvm/aia_imsic.c

0 → 100644
+914 −0

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