summaryrefslogtreecommitdiffstats
path: root/arch/s390/include/asm/cpacf.h
diff options
context:
space:
mode:
Diffstat (limited to 'arch/s390/include/asm/cpacf.h')
-rw-r--r--arch/s390/include/asm/cpacf.h109
1 files changed, 89 insertions, 20 deletions
diff --git a/arch/s390/include/asm/cpacf.h b/arch/s390/include/asm/cpacf.h
index b378e2b57a..c786538e39 100644
--- a/arch/s390/include/asm/cpacf.h
+++ b/arch/s390/include/asm/cpacf.h
@@ -166,28 +166,86 @@
typedef struct { unsigned char bytes[16]; } cpacf_mask_t;
-/**
- * cpacf_query() - check if a specific CPACF function is available
- * @opcode: the opcode of the crypto instruction
- * @func: the function code to test for
- *
- * 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
+/*
+ * Prototype for a not existing function to produce a link
+ * error if __cpacf_query() or __cpacf_check_opcode() is used
+ * with an invalid compile time const opcode.
*/
-static __always_inline void __cpacf_query(unsigned int opcode, cpacf_mask_t *mask)
+void __cpacf_bad_opcode(void);
+
+static __always_inline void __cpacf_query_rre(u32 opc, u8 r1, u8 r2,
+ cpacf_mask_t *mask)
{
asm volatile(
- " lghi 0,0\n" /* query function */
- " lgr 1,%[mask]\n"
- " spm 0\n" /* pckmo doesn't change the cc */
- /* Parameter regs are ignored, but must be nonzero and unique */
- "0: .insn rrf,%[opc] << 16,2,4,6,0\n"
- " brc 1,0b\n" /* handle partial completion */
- : "=m" (*mask)
- : [mask] "d" ((unsigned long)mask), [opc] "i" (opcode)
- : "cc", "0", "1");
+ " la %%r1,%[mask]\n"
+ " xgr %%r0,%%r0\n"
+ " .insn rre,%[opc] << 16,%[r1],%[r2]\n"
+ : [mask] "=R" (*mask)
+ : [opc] "i" (opc),
+ [r1] "i" (r1), [r2] "i" (r2)
+ : "cc", "r0", "r1");
+}
+
+static __always_inline void __cpacf_query_rrf(u32 opc,
+ u8 r1, u8 r2, u8 r3, u8 m4,
+ cpacf_mask_t *mask)
+{
+ asm volatile(
+ " la %%r1,%[mask]\n"
+ " xgr %%r0,%%r0\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");
+}
+
+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();
+ }
}
static __always_inline int __cpacf_check_opcode(unsigned int opcode)
@@ -211,10 +269,21 @@ static __always_inline int __cpacf_check_opcode(unsigned int opcode)
case CPACF_KMA:
return test_facility(146); /* check for MSA8 */
default:
- BUG();
+ __cpacf_bad_opcode();
+ return 0;
}
}
+/**
+ * cpacf_query() - check if a specific CPACF function is available
+ * @opcode: the opcode of the crypto instruction
+ * @func: the function code to test for
+ *
+ * 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
+ */
static __always_inline int cpacf_query(unsigned int opcode, cpacf_mask_t *mask)
{
if (__cpacf_check_opcode(opcode)) {