@@ -698,3 +698,33 @@ bool s390_cpu_models_used(void)
{
return cpu_models_used;
}
+
+static inline int test_facility(uint64_t *fac_list, uint16_t nr)
+{
+ uint16_t word = nr / BITS_PER_LONG;
+ uint16_t be_bit = (BITS_PER_LONG - 1) - (nr % BITS_PER_LONG);
+
+ return (nr < FAC_LIST_CPU_S390_SIZE_UINT1) ?
+ (fac_list[word] >> be_bit) & __UINT64_C(1) : 0;
+}
+
+/**
+ * s390_test_facility:
+ * @nr: facility bit number to test
+ * @cc: cpu class to test
+ *
+ * The functions tests if the cpu facility identified by bit @nr is available
+ * to the cpu class @cc.
+ *
+ * Returns: a boolean value.
+ *
+ * Since: 2.3
+ */
+bool s390_test_facility(S390CPUClass *cc, uint16_t nr)
+{
+ if (!cc) {
+ return false;
+ }
+ return test_facility(cc->fac_list, nr) ? true : false;
+}
+
@@ -116,6 +116,7 @@ bool s390_cpu_classes_initialized(void);
bool s390_probe_mode(void);
void s390_cpu_model_init(S390CPUClass *cc);
bool s390_cpu_models_used(void);
+bool s390_test_facility(S390CPUClass *cc, uint16_t nr);
/*
* bits 0-7 : CMOS generation
The patch introduces routine s390_facility_test() which allows to verify a specific facility bit is set. Signed-off-by: Michael Mueller <mimu@linux.vnet.ibm.com> --- target-s390x/cpu-models.c | 30 ++++++++++++++++++++++++++++++ target-s390x/cpu-models.h | 1 + 2 files changed, 31 insertions(+)