The patch introduces routine s390_facility_test() which allows to verify a specific facility bit is set. Signed-off-by: Michael Mueller <mimu@xxxxxxxxxxxxxxxxxx> --- target-s390x/cpu-models.c | 30 ++++++++++++++++++++++++++++++ target-s390x/cpu-models.h | 1 + 2 files changed, 31 insertions(+) diff --git a/target-s390x/cpu-models.c b/target-s390x/cpu-models.c index 7ad61df..5c4eac5 100644 --- a/target-s390x/cpu-models.c +++ b/target-s390x/cpu-models.c @@ -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; +} + diff --git a/target-s390x/cpu-models.h b/target-s390x/cpu-models.h index 3605aa4..557f5e5 100644 --- a/target-s390x/cpu-models.h +++ b/target-s390x/cpu-models.h @@ -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 -- 1.8.3.1 -- To unsubscribe from this list: send the line "unsubscribe linux-s390" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html