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| author | Tianrui Zhao <zhaotianrui@loongson.cn> | 2023-10-02 10:01:29 +0800 |
|---|---|---|
| committer | Huacai Chen <chenhuacai@loongson.cn> | 2023-10-02 10:01:29 +0800 |
| commit | 71f4fb845874c3c54527e2e5afd687493db9d4d4 (patch) | |
| tree | e75afd09eca19218e34ca1f123cf3445fe1c96d3 /arch | |
| parent | 37cdfc6dbf04169310a24f3a79b554c363260562 (diff) | |
| download | lwn-71f4fb845874c3c54527e2e5afd687493db9d4d4.tar.gz lwn-71f4fb845874c3c54527e2e5afd687493db9d4d4.zip | |
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: 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>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/loongarch/kvm/exit.c | 36 |
1 files changed, 36 insertions, 0 deletions
diff --git a/arch/loongarch/kvm/exit.c b/arch/loongarch/kvm/exit.c index e855ab9099b2..ce8de3fa472c 100644 --- a/arch/loongarch/kvm/exit.c +++ b/arch/loongarch/kvm/exit.c @@ -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); +} |