KVM: x86/tdx: Do VMXON and TDX-Module initialization during subsys init

Now that VMXON can be done without bouncing through KVM, do TDX-Module
initialization during subsys init (specifically before module_init() so
that it runs before KVM when both are built-in).  Aside from the obvious
benefits of separating core TDX code from KVM, this will allow tagging a
pile of TDX functions and globals as being __init and __ro_after_init.

Reviewed-by: Dan Williams <dan.j.williams@intel.com>
Reviewed-by: Chao Gao <chao.gao@intel.com>
Acked-by: Dave Hansen <dave.hansen@linux.intel.com>
Tested-by: Chao Gao <chao.gao@intel.com>
Tested-by: Sagi Shahar <sagis@google.com>
Link: https://patch.msgid.link/20260214012702.2368778-12-seanjc@google.com
Signed-off-by: Sean Christopherson <seanjc@google.com>

1 files changed, 0 insertions, 4 deletions

diff --git a/arch/x86/include/asm/tdx.h b/arch/x86/include/asm/tdx.h
index 6b338d7f01b7..a149740b24e8 100644
--- a/arch/x86/include/asm/tdx.h
+++ b/arch/x86/include/asm/tdx.h
@@ -145,8 +145,6 @@ static __always_inline u64 sc_retry(sc_func_t func, u64 fn,
 #define seamcall(_fn, _args)		sc_retry(__seamcall, (_fn), (_args))
 #define seamcall_ret(_fn, _args)	sc_retry(__seamcall_ret, (_fn), (_args))
 #define seamcall_saved_ret(_fn, _args)	sc_retry(__seamcall_saved_ret, (_fn), (_args))
-int tdx_cpu_enable(void);
-int tdx_enable(void);
 const char *tdx_dump_mce_info(struct mce *m);
 const struct tdx_sys_info *tdx_get_sysinfo(void);
 
@@ -223,8 +221,6 @@ u64 tdh_phymem_page_wbinvd_tdr(struct tdx_td *td);
 u64 tdh_phymem_page_wbinvd_hkid(u64 hkid, struct page *page);
 #else
 static inline void tdx_init(void) { }
-static inline int tdx_cpu_enable(void) { return -ENODEV; }
-static inline int tdx_enable(void)  { return -ENODEV; }
 static inline u32 tdx_get_nr_guest_keyids(void) { return 0; }
 static inline const char *tdx_dump_mce_info(struct mce *m) { return NULL; }
 static inline const struct tdx_sys_info *tdx_get_sysinfo(void) { return NULL; }