diff options
Diffstat (limited to 'arch/s390/include/asm/cpacf.h')
| -rw-r--r-- | arch/s390/include/asm/cpacf.h | 31 |
1 files changed, 30 insertions, 1 deletions
diff --git a/arch/s390/include/asm/cpacf.h b/arch/s390/include/asm/cpacf.h index 52652f0acfce..1d3a4b0c650f 100644 --- a/arch/s390/include/asm/cpacf.h +++ b/arch/s390/include/asm/cpacf.h @@ -205,8 +205,10 @@ #define CPACF_KDSA_ENC_EDDSA_SIGN_ED448 0x34 #define CPACF_FC_QUERY 0x00 +#define CPACF_FC_QUERY_AUTH_INFO 0x7F typedef struct { unsigned char bytes[16]; } cpacf_mask_t; +typedef struct { unsigned char bytes[256]; } cpacf_qai_t; /* * Prototype for a not existing function to produce a link @@ -349,7 +351,8 @@ static inline int cpacf_test_func(cpacf_mask_t *mask, unsigned int func) return (mask->bytes[func >> 3] & (0x80 >> (func & 7))) != 0; } -static __always_inline int cpacf_query_func(unsigned int opcode, unsigned int func) +static __always_inline int cpacf_query_func(unsigned int opcode, + unsigned int func) { cpacf_mask_t mask; @@ -358,6 +361,32 @@ static __always_inline int cpacf_query_func(unsigned int opcode, unsigned int fu return 0; } +static __always_inline void __cpacf_qai(unsigned int opcode, cpacf_qai_t *qai) +{ + __cpacf_query_insn(opcode, qai, CPACF_FC_QUERY_AUTH_INFO); +} + +/** + * cpacf_qai() - Get the query authentication information for a CPACF opcode + * @opcode: the opcode of the crypto instruction + * @mask: ptr to struct cpacf_qai_t + * + * Executes the query authentication information function for the given crypto + * instruction @opcode and checks if @func is available + * + * On success 1 is returned and the mask is filled with the query authentication + * information for this CPACF opcode, otherwise 0 is returned. + */ +static __always_inline int cpacf_qai(unsigned int opcode, cpacf_qai_t *qai) +{ + if (cpacf_query_func(opcode, CPACF_FC_QUERY_AUTH_INFO)) { + __cpacf_qai(opcode, qai); + return 1; + } + memset(qai, 0, sizeof(*qai)); + return 0; +} + /** * cpacf_km() - executes the KM (CIPHER MESSAGE) instruction * @func: the function code passed to KM; see CPACF_KM_xxx defines |