| Message ID | db6a2a6b394d9900ce8e3abb1b471b61b7e25c53.1648847675.git.reinette.chatre@intel.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | x86/sgx and selftests/sgx: Support SGX2 | expand |
On Mon, Apr 04, 2022 at 09:49:12AM -0700, Reinette Chatre wrote: > Add a wrapper for the EAUG ENCLS leaf function used to > add a page to an initialized enclave. > > EAUG: > 1) Stores all properties of the new enclave page in the SGX > hardware's Enclave Page Cache Map (EPCM). > 2) Sets the PENDING bit in the EPCM entry of the enclave page. > This bit is cleared by the enclave by invoking ENCLU leaf > function EACCEPT or EACCEPTCOPY. > > Access from within the enclave to the new enclave page is not > possible until the PENDING bit is cleared. > > Signed-off-by: Reinette Chatre <reinette.chatre@intel.com> > --- > No changes since V2 > > Changes since V1: > - Split original patch ("x86/sgx: Add wrappers for SGX2 functions") > in three to introduce the SGX2 functions separately (Jarkko). > - Rewrite commit message to include how the EPCM within the hardware > is changed by the SGX2 function as well as any calling > conditions (Jarkko). > > arch/x86/kernel/cpu/sgx/encls.h | 6 ++++++ > 1 file changed, 6 insertions(+) > > diff --git a/arch/x86/kernel/cpu/sgx/encls.h b/arch/x86/kernel/cpu/sgx/encls.h > index 7a1ecf704ec1..99004b02e2ed 100644 > --- a/arch/x86/kernel/cpu/sgx/encls.h > +++ b/arch/x86/kernel/cpu/sgx/encls.h > @@ -227,4 +227,10 @@ static inline int __emodt(struct sgx_secinfo *secinfo, void *addr) > return __encls_ret_2(EMODT, secinfo, addr); > } > > +/* Zero a page of EPC memory and add it to an initialized enclave. */ > +static inline int __eaug(struct sgx_pageinfo *pginfo, void *addr) > +{ > + return __encls_2(EAUG, pginfo, addr); > +} > + > #endif /* _X86_ENCLS_H */ > -- > 2.25.1 > Reviewed-by: Jarkko Sakkinen <jarkko@kernel.org> BR, Jarkko
diff --git a/arch/x86/kernel/cpu/sgx/encls.h b/arch/x86/kernel/cpu/sgx/encls.h index 7a1ecf704ec1..99004b02e2ed 100644 --- a/arch/x86/kernel/cpu/sgx/encls.h +++ b/arch/x86/kernel/cpu/sgx/encls.h @@ -227,4 +227,10 @@ static inline int __emodt(struct sgx_secinfo *secinfo, void *addr) return __encls_ret_2(EMODT, secinfo, addr); } +/* Zero a page of EPC memory and add it to an initialized enclave. */ +static inline int __eaug(struct sgx_pageinfo *pginfo, void *addr) +{ + return __encls_2(EAUG, pginfo, addr); +} + #endif /* _X86_ENCLS_H */
Add a wrapper for the EAUG ENCLS leaf function used to add a page to an initialized enclave. EAUG: 1) Stores all properties of the new enclave page in the SGX hardware's Enclave Page Cache Map (EPCM). 2) Sets the PENDING bit in the EPCM entry of the enclave page. This bit is cleared by the enclave by invoking ENCLU leaf function EACCEPT or EACCEPTCOPY. Access from within the enclave to the new enclave page is not possible until the PENDING bit is cleared. Signed-off-by: Reinette Chatre <reinette.chatre@intel.com> --- No changes since V2 Changes since V1: - Split original patch ("x86/sgx: Add wrappers for SGX2 functions") in three to introduce the SGX2 functions separately (Jarkko). - Rewrite commit message to include how the EPCM within the hardware is changed by the SGX2 function as well as any calling conditions (Jarkko). arch/x86/kernel/cpu/sgx/encls.h | 6 ++++++ 1 file changed, 6 insertions(+)