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authorTianrui Zhao <zhaotianrui@loongson.cn>2023-10-02 10:01:29 +0800
committerHuacai Chen <chenhuacai@loongson.cn>2023-10-02 10:01:29 +0800
commit71f4fb845874c3c54527e2e5afd687493db9d4d4 (patch)
treee75afd09eca19218e34ca1f123cf3445fe1c96d3 /arch/loongarch
parent37cdfc6dbf04169310a24f3a79b554c363260562 (diff)
downloadlwn-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/loongarch')
-rw-r--r--arch/loongarch/kvm/exit.c36
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);
+}