On Sat, Jul 11, 2026 at 12:00:55PM +0200, Thorsten Blum wrote:
> The TCS structure was added with commit 70d3b8ddcd20 ("x86/sgx: Add SGX
> architectural data structures"), but has never had an in-tree user.
> Remove the unused TCS structure and its corresponding definitions.
>
> Signed-off-by: Thorsten Blum <[email protected]>
> ---
> arch/x86/include/asm/sgx.h | 50 --------------------------------------
> 1 file changed, 50 deletions(-)
>
> diff --git a/arch/x86/include/asm/sgx.h b/arch/x86/include/asm/sgx.h
> index 04958459a7ca..fe106c55a593 100644
> --- a/arch/x86/include/asm/sgx.h
> +++ b/arch/x86/include/asm/sgx.h
> @@ -193,56 +193,6 @@ struct sgx_secs {
> u8 reserved4[3834];
> } __packed;
>
> -/**
> - * enum sgx_tcs_flags - execution flags for TCS
> - * @SGX_TCS_DBGOPTIN: If enabled allows single-stepping and
> breakpoints
> - * inside an enclave. It is cleared by EADD but can
> - * be set later with EDBGWR.
> - */
> -enum sgx_tcs_flags {
> - SGX_TCS_DBGOPTIN = 0x01,
> -};
> -
> -#define SGX_TCS_RESERVED_MASK GENMASK_ULL(63, 1)
> -#define SGX_TCS_RESERVED_SIZE 4024
> -
> -/**
> - * struct sgx_tcs - Thread Control Structure (TCS)
> - * @state: used to mark an entered TCS
> - * @flags: execution flags (cleared by EADD)
> - * @ssa_offset: SSA stack offset relative to the enclave base
> - * @ssa_index: the current SSA frame index (cleard by EADD)
> - * @nr_ssa_frames: the number of frame in the SSA stack
> - * @entry_offset: entry point offset relative to the enclave base
> - * @exit_addr: address outside the enclave to exit on an
> exception or
> - * interrupt
> - * @fs_offset: offset relative to the enclave base to become FS
> - * segment inside the enclave
> - * @gs_offset: offset relative to the enclave base to become GS
> - * segment inside the enclave
> - * @fs_limit: size to become a new FS-limit (only 32-bit
> enclaves)
> - * @gs_limit: size to become a new GS-limit (only 32-bit
> enclaves)
> - *
> - * Thread Control Structure (TCS) is an enclave page visible in its address
> - * space that defines an entry point inside the enclave. A thread enters
> inside
> - * an enclave by supplying address of TCS to ENCLU(EENTER). A TCS can be
> entered
> - * by only one thread at a time.
> - */
> -struct sgx_tcs {
> - u64 state;
> - u64 flags;
> - u64 ssa_offset;
> - u32 ssa_index;
> - u32 nr_ssa_frames;
> - u64 entry_offset;
> - u64 exit_addr;
> - u64 fs_offset;
> - u64 gs_offset;
> - u32 fs_limit;
> - u32 gs_limit;
> - u8 reserved[SGX_TCS_RESERVED_SIZE];
> -} __packed;
> -
> /**
> * struct sgx_pageinfo - an enclave page descriptor
> * @addr: address of the enclave page
Reviewed-by: Jarkko Sakkinen <[email protected]>
BR, Jarkko
