On Fri, Sep 27, 2019 at 12:20:13PM +0200, Borislav Petkov wrote: > On Tue, Sep 03, 2019 at 05:26:36PM +0300, Jarkko Sakkinen wrote: > > Document ENCLS architectural error codes. These error codes are returned by > > the SGX opcodes. Make the header as part of the uapi so that they can be > > used in some situations directly returned to the user space (ENCLS[EINIT] > > leaf function error codes could be one potential use case). > > > > Signed-off-by: Jarkko Sakkinen <jarkko.sakki...@linux.intel.com> > > Co-developed-by: Sean Christopherson <sean.j.christopher...@intel.com> > > Signed-off-by: Sean Christopherson <sean.j.christopher...@intel.com> > > --- > > arch/x86/include/uapi/asm/sgx_errno.h | 91 +++++++++++++++++++++++++++ > > 1 file changed, 91 insertions(+) > > create mode 100644 arch/x86/include/uapi/asm/sgx_errno.h > > > > diff --git a/arch/x86/include/uapi/asm/sgx_errno.h > > b/arch/x86/include/uapi/asm/sgx_errno.h > > new file mode 100644 > > index 000000000000..48b87aed58d7 > > --- /dev/null > > +++ b/arch/x86/include/uapi/asm/sgx_errno.h > > @@ -0,0 +1,91 @@ > > +/* SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause */ > > +/* > > + * Copyright(c) 2018 Intel Corporation. > > + * > > + * Contains the architecturally defined error codes that are returned by > > SGX > > + * instructions, e.g. ENCLS, and may be propagated to userspace via errno. > > + */ > > + > > +#ifndef _UAPI_ASM_X86_SGX_ERRNO_H > > +#define _UAPI_ASM_X86_SGX_ERRNO_H > > + > > +/** > > + * enum sgx_encls_leaves - return codes for ENCLS, ENCLU and ENCLV > > + * %SGX_SUCCESS: No error. > > + * %SGX_INVALID_SIG_STRUCT: SIGSTRUCT contains an invalid value. > > + * %SGX_INVALID_ATTRIBUTE: Enclave is not attempting to access a resource > > That first "not" looks wrong. > > > + * for which it is not authorized. > > + * %SGX_BLKSTATE: EPC page is already blocked. > > + * %SGX_INVALID_MEASUREMENT: SIGSTRUCT or EINITTOKEN contains an > > incorrect > > + * measurement. > > + * %SGX_NOTBLOCKABLE: EPC page type is not one which can be > > blocked. > > + * %SGX_PG_INVLD: EPC page is invalid (and cannot be blocked). > > + * %SGX_EPC_PAGE_CONFLICT: EPC page in use by another SGX instruction. > > + * %SGX_INVALID_SIGNATURE: Enclave's signature does not validate with > > + * public key enclosed in SIGSTRUCT. > > + * %SGX_MAC_COMPARE_FAIL: MAC check failed when reloading EPC page. > > + * %SGX_PAGE_NOT_BLOCKED: EPC page is not marked as blocked. > > + * %SGX_NOT_TRACKED: ETRACK has not been completed on the > > EPC page. > > + * %SGX_VA_SLOT_OCCUPIED: Version array slot contains a valid entry. > > + * %SGX_CHILD_PRESENT: Enclave has child pages present in the > > EPC. > > + * %SGX_ENCLAVE_ACT: Logical processors are currently > > executing > > + * inside the enclave. > > + * %SGX_ENTRYEPOCH_LOCKED: SECS locked for EPOCH update, i.e. an ETRACK is > > + * currently executing on the SECS. > > + * %SGX_INVALID_EINITTOKEN: EINITTOKEN is invalid and enclave > > signer's > > + * public key does not match IA32_SGXLEPUBKEYHASH. > > + * %SGX_PREV_TRK_INCMPL: All processors did not complete the previous > > + * tracking sequence. > > + * %SGX_PG_IS_SECS: Target EPC page is an SECS and cannot be > > + * blocked. > > + * %SGX_PAGE_ATTRIBUTES_MISMATCH: Attributes of the EPC page do not match > > + * the expected values. > > You sometimes call it "PG" and sometimes "PAGE". Unify? > > > + * %SGX_PAGE_NOT_MODIFIABLE: EPC page cannot be modified because it > > is in > > + * the PENDING or MODIFIED state. > > + * %SGX_PAGE_NOT_DEBUGGABLE: EPC page cannot be modified because it > > is in > > + * the PENDING or MODIFIED state. > > Same description text?
Thanks for the remarks. I think I define only the error codes in the next version that actually get used by the driver and document them properly. Should become way more cleaner. /Jarkko
