Since the rip register is inaccessible for TDX VMs, we need a different way to set the guest entry point for TDX VMs. This is done by writing the guest code address to a predefined location in the guest memory and loading it into rip as part of the TDX boot code.
Signed-off-by: Sagi Shahar sagis@google.com --- tools/testing/selftests/kvm/lib/x86/processor.c | 10 +++++++--- 1 file changed, 7 insertions(+), 3 deletions(-)
diff --git a/tools/testing/selftests/kvm/lib/x86/processor.c b/tools/testing/selftests/kvm/lib/x86/processor.c index 036875fe140f..17f5a381fe43 100644 --- a/tools/testing/selftests/kvm/lib/x86/processor.c +++ b/tools/testing/selftests/kvm/lib/x86/processor.c @@ -691,9 +691,13 @@ void vcpu_arch_set_entry_point(struct kvm_vcpu *vcpu, void *guest_code) { struct kvm_regs regs;
- vcpu_regs_get(vcpu, ®s); - regs.rip = (unsigned long) guest_code; - vcpu_regs_set(vcpu, ®s); + if (is_tdx_vm(vcpu->vm)) + vm_tdx_set_vcpu_entry_point(vcpu, guest_code); + else { + vcpu_regs_get(vcpu, ®s); + regs.rip = (unsigned long) guest_code; + vcpu_regs_set(vcpu, ®s); + } }
vm_vaddr_t kvm_allocate_vcpu_stack(struct kvm_vm *vm)