| From | isaku.yamahata@intel ... | Subject | [RFC PATCH v5 096/104] KVM: TDX: Handle TDX PV rdmsr hypercall | Date | Fri, 4 Mar 2022 11:49:52 -0800 |
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From: Isaku Yamahata <isaku.yamahata@intel.com>
Wire up TDX PV rdmsr hypercall to the KVM backend function.
Signed-off-by: Isaku Yamahata <isaku.yamahata@intel.com> --- arch/x86/kvm/vmx/tdx.c | 19 +++++++++++++++++++ 1 file changed, 19 insertions(+)
diff --git a/arch/x86/kvm/vmx/tdx.c b/arch/x86/kvm/vmx/tdx.c index cec2660206bd..dd7aaa28bf3a 100644 --- a/arch/x86/kvm/vmx/tdx.c +++ b/arch/x86/kvm/vmx/tdx.c @@ -1124,6 +1124,23 @@ static int tdx_emulate_mmio(struct kvm_vcpu *vcpu) return 1; } +static int tdx_emulate_rdmsr(struct kvm_vcpu *vcpu) +{ + u32 index = tdvmcall_p1_read(vcpu); + u64 data; + + if (kvm_get_msr(vcpu, index, &data)) { + trace_kvm_msr_read_ex(index); + tdvmcall_set_return_code(vcpu, TDG_VP_VMCALL_INVALID_OPERAND); + return 1; + } + trace_kvm_msr_read(index, data); + + tdvmcall_set_return_code(vcpu, TDG_VP_VMCALL_SUCCESS); + tdvmcall_set_return_val(vcpu, data); + return 1; +} + static int handle_tdvmcall(struct kvm_vcpu *vcpu) { struct vcpu_tdx *tdx = to_tdx(vcpu); @@ -1143,6 +1160,8 @@ static int handle_tdvmcall(struct kvm_vcpu *vcpu) return tdx_emulate_io(vcpu); case EXIT_REASON_EPT_VIOLATION: return tdx_emulate_mmio(vcpu); + case EXIT_REASON_MSR_READ: + return tdx_emulate_rdmsr(vcpu); default: break; } -- 2.25.1
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