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@xxxxxxxxxxx>
Tested-by: Huacai Chen <chenhuacai@xxxxxxxxxxx>
Signed-off-by: Tianrui Zhao <zhaotianrui@xxxxxxxxxxx>
---
arch/loongarch/kvm/exit.c | 36 ++++++++++++++++++++++++++++++++++++
1 file changed, 36 insertions(+)
diff --git a/arch/loongarch/kvm/exit.c b/arch/loongarch/kvm/exit.c
index e855ab9099..ce8de3fa47 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);
+}
--
2.39.3
