On 9/4/2025 2:54 PM, Sagi Shahar wrote:
From: Isaku Yamahata isaku.yamahata@intel.com
Let kvm_init_vm_address_properties() initialize vm->arch.{s_bit, tag_mask} similar to SEV.
TDX sets the shared bit based on the guest physical address width and currently supports 48 and 52 widths.
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 Co-developed-by: Sagi Shahar sagis@google.com Signed-off-by: Sagi Shahar sagis@google.com
Reviewed-by: Binbin Wu binbin.wu@linux.intel.com
.../selftests/kvm/include/x86/tdx/tdx_util.h | 14 ++++++++++++++ tools/testing/selftests/kvm/lib/x86/processor.c | 12 ++++++++++-- 2 files changed, 24 insertions(+), 2 deletions(-) create mode 100644 tools/testing/selftests/kvm/include/x86/tdx/tdx_util.h
diff --git a/tools/testing/selftests/kvm/include/x86/tdx/tdx_util.h b/tools/testing/selftests/kvm/include/x86/tdx/tdx_util.h new file mode 100644 index 000000000000..286d5e3c24b1 --- /dev/null +++ b/tools/testing/selftests/kvm/include/x86/tdx/tdx_util.h @@ -0,0 +1,14 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ +#ifndef SELFTESTS_TDX_TDX_UTIL_H +#define SELFTESTS_TDX_TDX_UTIL_H
+#include <stdbool.h>
+#include "kvm_util.h"
+static inline bool is_tdx_vm(struct kvm_vm *vm) +{
- return vm->type == KVM_X86_TDX_VM;
+}
+#endif // SELFTESTS_TDX_TDX_UTIL_H diff --git a/tools/testing/selftests/kvm/lib/x86/processor.c b/tools/testing/selftests/kvm/lib/x86/processor.c index 82369373e843..2a44831e0cc9 100644 --- a/tools/testing/selftests/kvm/lib/x86/processor.c +++ b/tools/testing/selftests/kvm/lib/x86/processor.c @@ -8,6 +8,7 @@ #include "kvm_util.h" #include "processor.h" #include "sev.h" +#include "tdx/tdx_util.h" #ifndef NUM_INTERRUPTS #define NUM_INTERRUPTS 256 @@ -1160,12 +1161,19 @@ 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);
- vm->arch.sev_fd = -1;
- 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 {
vm->arch.sev_fd = -1;
- } else if (is_tdx_vm(vm)) {
TEST_ASSERT(gpa_bits == 48 || gpa_bits == 52,"TDX: bad X86_PROPERTY_GUEST_MAX_PHY_ADDR value: %u", gpa_bits);vm->arch.s_bit = BIT_ULL(gpa_bits - 1);vm->gpa_tag_mask = vm->arch.s_bit;