diff options
Diffstat (limited to 'arch/x86/kernel/cpu')
| -rw-r--r-- | arch/x86/kernel/cpu/sgx/encls.h | 36 |
1 files changed, 5 insertions, 31 deletions
diff --git a/arch/x86/kernel/cpu/sgx/encls.h b/arch/x86/kernel/cpu/sgx/encls.h index 9b204843b78d..fa04a73daf9c 100644 --- a/arch/x86/kernel/cpu/sgx/encls.h +++ b/arch/x86/kernel/cpu/sgx/encls.h @@ -11,26 +11,8 @@ #include <asm/traps.h> #include "sgx.h" -/** - * ENCLS_FAULT_FLAG - flag signifying an ENCLS return code is a trapnr - * - * ENCLS has its own (positive value) error codes and also generates - * ENCLS specific #GP and #PF faults. And the ENCLS values get munged - * with system error codes as everything percolates back up the stack. - * Unfortunately (for us), we need to precisely identify each unique - * error code, e.g. the action taken if EWB fails varies based on the - * type of fault and on the exact SGX error code, i.e. we can't simply - * convert all faults to -EFAULT. - * - * To make all three error types coexist, we set bit 30 to identify an - * ENCLS fault. Bit 31 (technically bits N:31) is used to differentiate - * between positive (faults and SGX error codes) and negative (system - * error codes) values. - */ -#define ENCLS_FAULT_FLAG 0x40000000 - /* Retrieve the encoded trapnr from the specified return code. */ -#define ENCLS_TRAPNR(r) ((r) & ~ENCLS_FAULT_FLAG) +#define ENCLS_TRAPNR(r) ((r) & ~SGX_ENCLS_FAULT_FLAG) /* Issue a WARN() about an ENCLS function. */ #define ENCLS_WARN(r, name) { \ @@ -50,7 +32,7 @@ */ static inline bool encls_faulted(int ret) { - return ret & ENCLS_FAULT_FLAG; + return ret & SGX_ENCLS_FAULT_FLAG; } /** @@ -88,11 +70,7 @@ static inline bool encls_failed(int ret) asm volatile( \ "1: .byte 0x0f, 0x01, 0xcf;\n\t" \ "2:\n" \ - ".section .fixup,\"ax\"\n" \ - "3: orl $"__stringify(ENCLS_FAULT_FLAG)",%%eax\n" \ - " jmp 2b\n" \ - ".previous\n" \ - _ASM_EXTABLE_FAULT(1b, 3b) \ + _ASM_EXTABLE_TYPE(1b, 2b, EX_TYPE_FAULT_SGX) \ : "=a"(ret) \ : "a"(rax), inputs \ : "memory", "cc"); \ @@ -127,7 +105,7 @@ static inline bool encls_failed(int ret) * * Return: * 0 on success, - * trapnr with ENCLS_FAULT_FLAG set on fault + * trapnr with SGX_ENCLS_FAULT_FLAG set on fault */ #define __encls_N(rax, rbx_out, inputs...) \ ({ \ @@ -136,11 +114,7 @@ static inline bool encls_failed(int ret) "1: .byte 0x0f, 0x01, 0xcf;\n\t" \ " xor %%eax,%%eax;\n" \ "2:\n" \ - ".section .fixup,\"ax\"\n" \ - "3: orl $"__stringify(ENCLS_FAULT_FLAG)",%%eax\n" \ - " jmp 2b\n" \ - ".previous\n" \ - _ASM_EXTABLE_FAULT(1b, 3b) \ + _ASM_EXTABLE_TYPE(1b, 2b, EX_TYPE_FAULT_SGX) \ : "=a"(ret), "=b"(rbx_out) \ : "a"(rax), inputs \ : "memory"); \ |