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x86/virt/tdx: Enable TDX module runtime updates

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All pieces of TDX module runtime updates are in place. Enable it if it
is supported.

Signed-off-by: Chao Gao <chao.gao@intel.com>
Signed-off-by: Dave Hansen <dave.hansen@linux.intel.com>
Reviewed-by: Xu Yilun <yilun.xu@linux.intel.com>
Reviewed-by: Tony Lindgren <tony.lindgren@linux.intel.com>
Reviewed-by: Kiryl Shutsemau (Meta) <kas@kernel.org>
Reviewed-by: Rick Edgecombe <rick.p.edgecombe@intel.com>
Link: https://patch.msgid.link/20260520133909.409394-24-chao.gao@intel.com
This commit is contained in:
Chao Gao 2026-05-20 15:29:13 -07:00 committed by Dave Hansen
parent 856bc8bb99
commit 1e35f5945d
1 changed files with 2 additions and 2 deletions
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4
arch/x86/include/asm/tdx.h
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@ -33,6 +33,7 @@
#define TDX_RND_NO_ENTROPY 0x8000020300000000ULL
/* Bit definitions of TDX_FEATURES0 metadata field */
#define TDX_FEATURES0_TD_PRESERVING BIT_ULL(1)
#define TDX_FEATURES0_NO_RBP_MOD BIT_ULL(18)
#ifndef __ASSEMBLER__
@ -113,8 +114,7 @@ const struct tdx_sys_info *tdx_get_sysinfo(void);
static inline bool tdx_supports_runtime_update(const struct tdx_sys_info *sysinfo)
{
/* To be enabled when kernel is ready. */
return false;
return sysinfo->features.tdx_features0 & TDX_FEATURES0_TD_PRESERVING;
}
int tdx_guest_keyid_alloc(void);