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s390/crypto: Rework RRE and RRF CPACF inline functions

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Rework of the __cpacf_query_rre() and __cpacf_query_rrf() functions
to support additional function codes. A function code is passed as a
new parameter to specify which subfunction of the supplied Instruction
is to be called.

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 09:21:07 +02:00 committed by Vasily Gorbik
parent d2dec49d76
commit 27aad7f7a4
1 changed files with 69 additions and 61 deletions
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130
arch/s390/include/asm/cpacf.h
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@ -204,6 +204,8 @@
#define CPACF_KDSA_ENC_EDDSA_SIGN_ED25519 0x30
#define CPACF_KDSA_ENC_EDDSA_SIGN_ED448 0x34
#define CPACF_FC_QUERY 0x00
typedef struct { unsigned char bytes[16]; } cpacf_mask_t;
/*
@ -214,78 +216,83 @@ typedef struct { unsigned char bytes[16]; } cpacf_mask_t;
void __cpacf_bad_opcode(void);
static __always_inline void __cpacf_query_rre(u32 opc, u8 r1, u8 r2,
cpacf_mask_t *mask)
u8 *pb, u8 fc)
{
asm volatile(
" la %%r1,%[mask]\n"
" xgr %%r0,%%r0\n"
" la %%r1,%[pb]\n"
" lghi %%r0,%[fc]\n"
" .insn rre,%[opc] << 16,%[r1],%[r2]\n"
: [mask] "=R" (*mask)
: [opc] "i" (opc),
: [pb] "=R" (*pb)
: [opc] "i" (opc), [fc] "i" (fc),
[r1] "i" (r1), [r2] "i" (r2)
: "cc", "r0", "r1");
: "cc", "memory", "r0", "r1");
}
static __always_inline void __cpacf_query_rrf(u32 opc,
u8 r1, u8 r2, u8 r3, u8 m4,
cpacf_mask_t *mask)
static __always_inline void __cpacf_query_rrf(u32 opc, u8 r1, u8 r2, u8 r3,
u8 m4, u8 *pb, u8 fc)
{
asm volatile(
" la %%r1,%[mask]\n"
" xgr %%r0,%%r0\n"
" la %%r1,%[pb]\n"
" lghi %%r0,%[fc]\n"
" .insn rrf,%[opc] << 16,%[r1],%[r2],%[r3],%[m4]\n"
: [mask] "=R" (*mask)
: [opc] "i" (opc), [r1] "i" (r1), [r2] "i" (r2),
[r3] "i" (r3), [m4] "i" (m4)
: "cc", "r0", "r1");
: [pb] "=R" (*pb)
: [opc] "i" (opc), [fc] "i" (fc), [r1] "i" (r1),
[r2] "i" (r2), [r3] "i" (r3), [m4] "i" (m4)
: "cc", "memory", "r0", "r1");
}
static __always_inline void __cpacf_query_insn(unsigned int opcode, void *pb,
u8 fc)
{
switch (opcode) {
case CPACF_KDSA:
__cpacf_query_rre(CPACF_KDSA, 0, 2, pb, fc);
break;
case CPACF_KIMD:
__cpacf_query_rre(CPACF_KIMD, 0, 2, pb, fc);
break;
case CPACF_KLMD:
__cpacf_query_rre(CPACF_KLMD, 0, 2, pb, fc);
break;
case CPACF_KM:
__cpacf_query_rre(CPACF_KM, 2, 4, pb, fc);
break;
case CPACF_KMA:
__cpacf_query_rrf(CPACF_KMA, 2, 4, 6, 0, pb, fc);
break;
case CPACF_KMAC:
__cpacf_query_rre(CPACF_KMAC, 0, 2, pb, fc);
break;
case CPACF_KMC:
__cpacf_query_rre(CPACF_KMC, 2, 4, pb, fc);
break;
case CPACF_KMCTR:
__cpacf_query_rrf(CPACF_KMCTR, 2, 4, 6, 0, pb, fc);
break;
case CPACF_KMF:
__cpacf_query_rre(CPACF_KMF, 2, 4, pb, fc);
break;
case CPACF_KMO:
__cpacf_query_rre(CPACF_KMO, 2, 4, pb, fc);
break;
case CPACF_PCC:
__cpacf_query_rre(CPACF_PCC, 0, 0, pb, fc);
break;
case CPACF_PCKMO:
__cpacf_query_rre(CPACF_PCKMO, 0, 0, pb, fc);
break;
case CPACF_PRNO:
__cpacf_query_rre(CPACF_PRNO, 2, 4, pb, fc);
break;
default:
__cpacf_bad_opcode();
}
}
static __always_inline void __cpacf_query(unsigned int opcode,
cpacf_mask_t *mask)
{
switch (opcode) {
case CPACF_KDSA:
__cpacf_query_rre(CPACF_KDSA, 0, 2, mask);
break;
case CPACF_KIMD:
__cpacf_query_rre(CPACF_KIMD, 0, 2, mask);
break;
case CPACF_KLMD:
__cpacf_query_rre(CPACF_KLMD, 0, 2, mask);
break;
case CPACF_KM:
__cpacf_query_rre(CPACF_KM, 2, 4, mask);
break;
case CPACF_KMA:
__cpacf_query_rrf(CPACF_KMA, 2, 4, 6, 0, mask);
break;
case CPACF_KMAC:
__cpacf_query_rre(CPACF_KMAC, 0, 2, mask);
break;
case CPACF_KMC:
__cpacf_query_rre(CPACF_KMC, 2, 4, mask);
break;
case CPACF_KMCTR:
__cpacf_query_rrf(CPACF_KMCTR, 2, 4, 6, 0, mask);
break;
case CPACF_KMF:
__cpacf_query_rre(CPACF_KMF, 2, 4, mask);
break;
case CPACF_KMO:
__cpacf_query_rre(CPACF_KMO, 2, 4, mask);
break;
case CPACF_PCC:
__cpacf_query_rre(CPACF_PCC, 0, 0, mask);
break;
case CPACF_PCKMO:
__cpacf_query_rre(CPACF_PCKMO, 0, 0, mask);
break;
case CPACF_PRNO:
__cpacf_query_rre(CPACF_PRNO, 2, 4, mask);
break;
default:
__cpacf_bad_opcode();
}
__cpacf_query_insn(opcode, mask, CPACF_FC_QUERY);
}
static __always_inline int __cpacf_check_opcode(unsigned int opcode)
@ -317,14 +324,15 @@ static __always_inline int __cpacf_check_opcode(unsigned int opcode)
}
/**
* cpacf_query() - check if a specific CPACF function is available
* cpacf_query() - Query the function code mask for this CPACF opcode
* @opcode: the opcode of the crypto instruction
* @func: the function code to test for
* @mask: ptr to struct cpacf_mask_t
*
* Executes the query function for the given crypto instruction @opcode
* and checks if @func is available
*
* Returns 1 if @func is available for @opcode, 0 otherwise
* On success 1 is returned and the mask is filled with the function
* code mask for this CPACF opcode, otherwise 0 is returned.
*/
static __always_inline int cpacf_query(unsigned int opcode, cpacf_mask_t *mask)
{