[PATCH v9 02/23] x86/virt/tdx: Move TDX_FEATURES0 bits to asm/tdx.h

[Chao Gao]

Move the TDX_FEATURES0 bit definitions from the private TDX header to
asm/tdx.h, and opportunistically switch to BIT_ULL() since TDX_FEATURES0 is
64-bit.

This prepares for TDX module update [1] and Dynamic PAMT [2] support. Both
add new TDX_FEATURES0 capability bits, and both need those capabilities to
be queried from code outside arch/x86/virt. The corresponding feature-query
helpers therefore need to live in the public asm/tdx.h header, so move the
existing bit definitions there first.

No functional change intended.

Signed-off-by: Chao Gao <chao.gao@xxxxxxxxx>
Link: https://lore.kernel.org/kvm/20260427152854.101171-17-chao.gao@xxxxxxxxx/ # [1]
Link: https://lore.kernel.org/kvm/20251121005125.417831-16-rick.p.edgecombe@xxxxxxxxx/ # [2]
---
 arch/x86/include/asm/tdx.h  | 3 +++
 arch/x86/virt/vmx/tdx/tdx.h | 3 ---
 2 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/arch/x86/include/asm/tdx.h b/arch/x86/include/asm/tdx.h
index 15eac89b0afb..e2430dd0e4d5 100644
--- a/arch/x86/include/asm/tdx.h
+++ b/arch/x86/include/asm/tdx.h
@@ -32,6 +32,9 @@
 #define TDX_SUCCESS		0ULL
 #define TDX_RND_NO_ENTROPY	0x8000020300000000ULL
 
+/* Bit definitions of TDX_FEATURES0 metadata field */
+#define TDX_FEATURES0_NO_RBP_MOD	BIT_ULL(18)
+
 #ifndef __ASSEMBLER__
 
 #include <uapi/asm/mce.h>
diff --git a/arch/x86/virt/vmx/tdx/tdx.h b/arch/x86/virt/vmx/tdx/tdx.h
index e2cf2dd48755..76c5fb1e1ffe 100644
--- a/arch/x86/virt/vmx/tdx/tdx.h
+++ b/arch/x86/virt/vmx/tdx/tdx.h
@@ -85,9 +85,6 @@ struct tdmr_info {
 	DECLARE_FLEX_ARRAY(struct tdmr_reserved_area, reserved_areas);
 } __packed __aligned(TDMR_INFO_ALIGNMENT);
 
-/* Bit definitions of TDX_FEATURES0 metadata field */
-#define TDX_FEATURES0_NO_RBP_MOD	BIT(18)
-
 /*
  * Do not put any hardware-defined TDX structure representations below
  * this comment!
-- 
2.52.0