TWxSoftware/twx-linux
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

s390/crypto: Add Support for Query Authentication Information

Browse Source 
Introduce functions __cpacf_qai() and wrapper cpacf_qai() to the
respective existing functions __cpacf_query() and cpacf_query() are
introduced to support the Query Authentication Information feature of
MSA 13.

Suggested-by: Harald Freudenberger <freude@linux.ibm.com>
Reviewed-by: Harald Freudenberger <freude@linux.ibm.com>
Acked-by: Heiko Carstens <hca@linux.ibm.com>
Signed-off-by: Finn Callies <fcallies@linux.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
This commit is contained in:
Finn Callies
2024-09-11 09:21:08 +02:00
committed by Vasily Gorbik
parent 27aad7f7a4
commit 9bbd1bfb86
1 changed files with 30 additions and 1 deletions
Download Patch File Download Diff File Expand all files Collapse all files
arch/s390/include/asm/cpacf.h
+30 -1
View File
@@ -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