Re: [PATCH v8 26/30] KVM: selftests: TDX: Add support for TDG.MEM.PAGE.ACCEPT

[Binbin Wu]

On 8/8/2025 4:16 AM, Sagi Shahar wrote:

From: Ackerley Tng <ackerley...@google.com>

Add support for TDG.MEM.PAGE.ACCEPT that the guest uses to accept
a pending private page, previously added by TDH.MEM.PAGE.AUG or after
conversion using the KVM_SET_MEMORY_ATTRIBUTES ioctl().

KVM_SET_MEMORY_ATTRIBUTES does the invalidation and attribute change, but it
doesn't add pending private pages.

Actually, pending pages are still added by TDH.MEM.PAGE.AUG during fault path.

Signed-off-by: Ackerley Tng <ackerley...@google.com>
Signed-off-by: Sagi Shahar <sa...@google.com>
---
  tools/testing/selftests/kvm/include/x86/tdx/tdx.h | 2 ++
  tools/testing/selftests/kvm/lib/x86/tdx/tdx.c     | 7 +++++++
  2 files changed, 9 insertions(+)

diff --git a/tools/testing/selftests/kvm/include/x86/tdx/tdx.h 
b/tools/testing/selftests/kvm/include/x86/tdx/tdx.h
index 88f3571df16f..53637159fa12 100644
--- a/tools/testing/selftests/kvm/include/x86/tdx/tdx.h
+++ b/tools/testing/selftests/kvm/include/x86/tdx/tdx.h
@@ -7,6 +7,7 @@
  #include "kvm_util.h"

#define TDG_VP_INFO 1

+#define TDG_MEM_PAGE_ACCEPT 6

#define TDG_VP_VMCALL_GET_TD_VM_CALL_INFO 0x10000

  #define TDG_VP_VMCALL_MAP_GPA 0x10001
@@ -40,5 +41,6 @@ uint64_t tdg_vp_info(uint64_t *rcx, uint64_t *rdx,
                     uint64_t *r8, uint64_t *r9,
                     uint64_t *r10, uint64_t *r11);
  uint64_t tdg_vp_vmcall_map_gpa(uint64_t address, uint64_t size, uint64_t 
*data_out);
+uint64_t tdg_mem_page_accept(uint64_t gpa, uint8_t level);

#endif // SELFTEST_TDX_TDX_H

diff --git a/tools/testing/selftests/kvm/lib/x86/tdx/tdx.c 
b/tools/testing/selftests/kvm/lib/x86/tdx/tdx.c
index bae84c34c19e..a51ab7511936 100644
--- a/tools/testing/selftests/kvm/lib/x86/tdx/tdx.c
+++ b/tools/testing/selftests/kvm/lib/x86/tdx/tdx.c
@@ -3,6 +3,7 @@
  #include <linux/kvm_para.h>
  #include <string.h>

+#include "processor.h"

  #include "tdx/tdcall.h"
  #include "tdx/tdx.h"
  #include "tdx/tdx_util.h"
@@ -215,3 +216,9 @@ uint64_t tdg_vp_vmcall_map_gpa(uint64_t address, uint64_t 
size, uint64_t *data_o
                *data_out = args.r11;
        return ret;
  }
+
+uint64_t tdg_mem_page_accept(uint64_t gpa, uint8_t level)
+{
+       return __tdx_module_call(TDG_MEM_PAGE_ACCEPT, (gpa & PAGE_MASK) | level,
+                                0, 0, 0, NULL);
+}