Re: [PATCH v11 3/5] x86/sgx: Define error codes for use by ENCLS[EUPDATESVN]

["Huang, Kai" <kai.huang@intel.com>]

On Wed, 2025-08-06 at 11:11 +0300, Elena Reshetova wrote:
> Add error codes for ENCLS[EUPDATESVN], then SGX CPUSVN update
> process can know the execution state of EUPDATESVN and notify
> userspace.
> 
> Signed-off-by: Elena Reshetova <elena.reshetova@intel.com>
> ---
>  arch/x86/include/asm/sgx.h | 6 ++++++
>  1 file changed, 6 insertions(+)
> 
> diff --git a/arch/x86/include/asm/sgx.h b/arch/x86/include/asm/sgx.h
> index 6a0069761508..2da5b3b117a1 100644
> --- a/arch/x86/include/asm/sgx.h
> +++ b/arch/x86/include/asm/sgx.h
> @@ -73,6 +73,10 @@ enum sgx_encls_function {
>   *				public key does not match IA32_SGXLEPUBKEYHASH.
>   * %SGX_PAGE_NOT_MODIFIABLE:	The EPC page cannot be modified because it
>   *				is in the PENDING or MODIFIED state.
> + * %SGX_INSUFFICIENT_ENTROPY:	Insufficient entropy in RNG.
> + * %SGX_NO_UPDATE:		EUPDATESVN could not update the CPUSVN because the
> + *				current SVN was not newer than CPUSVN. This is the most
> + *				common error code returned by EUPDATESVN.
>   * %SGX_UNMASKED_EVENT:		An unmasked event, e.g. INTR, was received
>   */
>  enum sgx_return_code {
> @@ -81,6 +85,8 @@ enum sgx_return_code {
>  	SGX_CHILD_PRESENT		= 13,
>  	SGX_INVALID_EINITTOKEN		= 16,
>  	SGX_PAGE_NOT_MODIFIABLE		= 20,
> +	SGX_INSUFFICIENT_ENTROPY	= 29,
> +	SGX_NO_UPDATE				= 31,

It seems the tap/writespace is broken, i.e., this error code is not
aligned with others.

>  	SGX_UNMASKED_EVENT		= 128,
>  };
>