diff options
Diffstat (limited to '0004-x86-sgx-Add-wrapper-for-SGX2-EAUG-function.patch')
| -rw-r--r-- | 0004-x86-sgx-Add-wrapper-for-SGX2-EAUG-function.patch | 41 |
1 files changed, 41 insertions, 0 deletions
diff --git a/0004-x86-sgx-Add-wrapper-for-SGX2-EAUG-function.patch b/0004-x86-sgx-Add-wrapper-for-SGX2-EAUG-function.patch new file mode 100644 index 000000000000..a44344dd65e5 --- /dev/null +++ b/0004-x86-sgx-Add-wrapper-for-SGX2-EAUG-function.patch @@ -0,0 +1,41 @@ +From dd3f8f27edf1638ae4eb10d40513ca6f290a826c Mon Sep 17 00:00:00 2001 +From: Reinette Chatre <reinette.chatre@intel.com> +Date: Mon, 7 Feb 2022 16:45:26 -0800 +Subject: [PATCH 04/34] x86/sgx: Add wrapper for SGX2 EAUG function + +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> +--- + 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 */ +-- +2.35.1 + |