From: Isaku Yamahata isaku.yamahata@intel.com
Let kvm_init_vm_address_properties() initialize vm->arch.{s_bit, tag_mask} similar to SEV.
Set shared bit position based on guest maximum physical address width instead of maximum physical address width, because that is what KVM uses, refer to setup_tdparams_eptp_controls(), and because maximum physical address width can be different.
In the case of SRF, guest maximum physical address width is 48 because SRF does not support 5-level EPT, even though the maximum physical address width is 52.
Co-developed-by: Adrian Hunter adrian.hunter@intel.com Signed-off-by: Adrian Hunter adrian.hunter@intel.com Signed-off-by: Isaku Yamahata isaku.yamahata@intel.com Signed-off-by: Sagi Shahar sagis@google.com --- tools/testing/selftests/kvm/lib/x86/processor.c | 9 +++++++++ 1 file changed, 9 insertions(+)
diff --git a/tools/testing/selftests/kvm/lib/x86/processor.c b/tools/testing/selftests/kvm/lib/x86/processor.c index d082d429e127..d9f4ecd6ffbc 100644 --- a/tools/testing/selftests/kvm/lib/x86/processor.c +++ b/tools/testing/selftests/kvm/lib/x86/processor.c @@ -1166,10 +1166,19 @@ void kvm_get_cpu_address_width(unsigned int *pa_bits, unsigned int *va_bits)
void kvm_init_vm_address_properties(struct kvm_vm *vm) { + uint32_t gpa_bits = kvm_cpu_property(X86_PROPERTY_GUEST_MAX_PHY_ADDR) + if (is_sev_vm(vm)) { vm->arch.sev_fd = open_sev_dev_path_or_exit(); vm->arch.c_bit = BIT_ULL(this_cpu_property(X86_PROPERTY_SEV_C_BIT)); vm->gpa_tag_mask = vm->arch.c_bit; + } else if (vm->type == KVM_X86_TDX_VM) { + TEST_ASSERT(gpa_bits == 48 || gpa_bits == 52, + "TDX: bad X86_PROPERTY_GUEST_MAX_PHY_ADDR value: %u", gpa_bits); + vm->arch.sev_fd = -1; + vm->arch.s_bit = 1ULL << (gpa_bits - 1); + vm->arch.c_bit = 0; + vm->gpa_tag_mask = vm->arch.s_bit; } else { vm->arch.sev_fd = -1; }