Commit 71f4fb84 authored by Tianrui Zhao's avatar Tianrui Zhao Committed by Huacai Chen
Browse files

LoongArch: KVM: Implement kvm exception vectors 



Implement kvm exception vectors, using kvm_fault_tables array to save
the handle function pointers and it is used when vcpu handle guest exit.

Reviewed-by: default avatarBibo Mao <maobibo@loongson.cn>
Tested-by: default avatarHuacai Chen <chenhuacai@loongson.cn>
Signed-off-by: default avatarTianrui Zhao <zhaotianrui@loongson.cn>
Signed-off-by: default avatarHuacai Chen <chenhuacai@loongson.cn>
parent 37cdfc6d

arch/loongarch/kvm/exit.c

+36 −0
Original line number Diff line number Diff line
@@ -658,3 +658,39 @@ static int kvm_handle_fpu_disabled(struct kvm_vcpu *vcpu) 


	return RESUME_GUEST;

}



/*

 * LoongArch KVM callback handling for unimplemented guest exiting

 */

static int kvm_fault_ni(struct kvm_vcpu *vcpu)

{

	unsigned int ecode, inst;

	unsigned long estat, badv;



	/* Fetch the instruction */

	inst = vcpu->arch.badi;

	badv = vcpu->arch.badv;

	estat = vcpu->arch.host_estat;

	ecode = (estat & CSR_ESTAT_EXC) >> CSR_ESTAT_EXC_SHIFT;

	kvm_err("ECode: %d PC=%#lx Inst=0x%08x BadVaddr=%#lx ESTAT=%#lx\n",

			ecode, vcpu->arch.pc, inst, badv, read_gcsr_estat());

	kvm_arch_vcpu_dump_regs(vcpu);

	kvm_queue_exception(vcpu, EXCCODE_INE, 0);



	return RESUME_GUEST;

}



static exit_handle_fn kvm_fault_tables[EXCCODE_INT_START] = {

	[0 ... EXCCODE_INT_START - 1]	= kvm_fault_ni,

	[EXCCODE_TLBI]			= kvm_handle_read_fault,

	[EXCCODE_TLBL]			= kvm_handle_read_fault,

	[EXCCODE_TLBS]			= kvm_handle_write_fault,

	[EXCCODE_TLBM]			= kvm_handle_write_fault,

	[EXCCODE_FPDIS]			= kvm_handle_fpu_disabled,

	[EXCCODE_GSPR]			= kvm_handle_gspr,

};



int kvm_handle_fault(struct kvm_vcpu *vcpu, int fault)

{

	return kvm_fault_tables[fault](vcpu);

}