From: Isaku Yamahata <isaku.yamahata@xxxxxxxxx>
Wire up TDX PV wrmsr hypercall to the KVM backend function.
Signed-off-by: Isaku Yamahata <isaku.yamahata@xxxxxxxxx>
---
arch/x86/kvm/vmx/tdx.c | 18 ++++++++++++++++++
1 file changed, 18 insertions(+)
diff --git a/arch/x86/kvm/vmx/tdx.c b/arch/x86/kvm/vmx/tdx.c
index dd7aaa28bf3a..123d4322da99 100644
--- a/arch/x86/kvm/vmx/tdx.c
+++ b/arch/x86/kvm/vmx/tdx.c
@@ -1141,6 +1141,22 @@ static int tdx_emulate_rdmsr(struct kvm_vcpu *vcpu)
return 1;
}
+static int tdx_emulate_wrmsr(struct kvm_vcpu *vcpu)
+{
+ u32 index = tdvmcall_p1_read(vcpu);
+ u64 data = tdvmcall_p2_read(vcpu);
+
+ if (kvm_set_msr(vcpu, index, data)) {
+ trace_kvm_msr_write_ex(index, data);
+ tdvmcall_set_return_code(vcpu, TDG_VP_VMCALL_INVALID_OPERAND);
+ return 1;
+ }
+
+ trace_kvm_msr_write(index, data);
+ tdvmcall_set_return_code(vcpu, TDG_VP_VMCALL_SUCCESS);
+ return 1;
+}
+
static int handle_tdvmcall(struct kvm_vcpu *vcpu)
{
struct vcpu_tdx *tdx = to_tdx(vcpu);
@@ -1162,6 +1178,8 @@ static int handle_tdvmcall(struct kvm_vcpu *vcpu)
return tdx_emulate_mmio(vcpu);
case EXIT_REASON_MSR_READ:
return tdx_emulate_rdmsr(vcpu);
+ case EXIT_REASON_MSR_WRITE:
+ return tdx_emulate_wrmsr(vcpu);
default:
break;
}
--
2.25.1
