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LoongArch: KVM: Implement kvm exception vectors

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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: Bibo Mao <maobibo@loongson.cn>
Tested-by: Huacai Chen <chenhuacai@loongson.cn>
Signed-off-by: Tianrui Zhao <zhaotianrui@loongson.cn>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
This commit is contained in:
Tianrui Zhao 2023-10-02 10:01:29 +08:00 committed by Huacai Chen
parent 37cdfc6dbf
commit 71f4fb8458
1 changed files with 36 additions and 0 deletions
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36
arch/loongarch/kvm/exit.c
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@ -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);
}