> -----Original Message-----
> From: Huang, Kai <kai.hu...@intel.com>
> Sent: Thursday, August 7, 2025 2:42 AM
> To: Reshetova, Elena <elena.reshet...@intel.com>; Hansen, Dave
> <dave.han...@intel.com>
> Cc: sea...@google.com; mi...@kernel.org; Scarlata, Vincent R
> <vincent.r.scarl...@intel.com>; x...@kernel.org; jar...@kernel.org;
> Annapurve, Vishal <vannapu...@google.com>; linux-kernel@vger.kernel.org;
> Mallick, Asit K <asit.k.mall...@intel.com>; Aktas, Erdem
> <erdemak...@google.com>; Cai, Chong <cho...@google.com>; Bondarevska,
> Nataliia <bond...@google.com>; linux-...@vger.kernel.org; Raynor, Scott
> <scott.ray...@intel.com>
> Subject: Re: [PATCH v11 3/5] x86/sgx: Define error codes for use by
> ENCLS[EUPDATESVN]
>
> 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.reshet...@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.
Not sure how this happened, will fix.
>
> > SGX_UNMASKED_EVENT = 128,
> > };
> >
