On 3/5/2022 3:49 AM, isaku.yamahata@xxxxxxxxx wrote:
From: Sean Christopherson <sean.j.christopherson@xxxxxxxxx>
TDX protects TDX guest state from VMM. Implements to access methods for
TDX guest state to ignore them or return zero.
...
+void tdx_cache_reg(struct kvm_vcpu *vcpu, enum kvm_reg reg)
+{
+ kvm_register_mark_available(vcpu, reg);
+ switch (reg) {
+ case VCPU_REGS_RSP:
+ case VCPU_REGS_RIP:
+ case VCPU_EXREG_PDPTR:
+ case VCPU_EXREG_CR0:
+ case VCPU_EXREG_CR3:
+ case VCPU_EXREG_CR4:
+ break;
+ default:
+ KVM_BUG_ON(1, vcpu->kvm);
+ break;
+ }
+}
Isaku,
We missed one case that some GPRs are accessible by KVM/userspace for
TDVMCALL exit.
