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[Qemu-devel] [PATCH v3 15/16] target-s390x: Introduce facility test rout
From: |
Michael Mueller |
Subject: |
[Qemu-devel] [PATCH v3 15/16] target-s390x: Introduce facility test routine |
Date: |
Mon, 2 Mar 2015 13:44:07 +0100 |
The patch introduces routine s390_facility_test() which allows to
verify a specific facility bit is set.
Signed-off-by: Michael Mueller <address@hidden>
---
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
- [Qemu-devel] [PATCH v3 07/16] target-s390x: Define cpu model specific facility lists, (continued)
- [Qemu-devel] [PATCH v3 07/16] target-s390x: Define cpu model specific facility lists, Michael Mueller, 2015/03/02
- [Qemu-devel] [PATCH v3 11/16] target-s390x: Add cpu class initialization routines, Michael Mueller, 2015/03/02
- [Qemu-devel] [PATCH v3 06/16] target-s390x: Introduce cpu models, Michael Mueller, 2015/03/02
- [Qemu-devel] [PATCH v3 05/16] target-s390x: Generate facility defines per cpu model, Michael Mueller, 2015/03/02
- [Qemu-devel] [PATCH v3 02/16] Introduce option --probe to switch into probe mode, Michael Mueller, 2015/03/02
- [Qemu-devel] [PATCH v3 08/16] target-s390x: Add cpu model alias definition routines, Michael Mueller, 2015/03/02
- [Qemu-devel] [PATCH v3 09/16] target-s390x: Update linux-headers/asm-s390/kvm.h, Michael Mueller, 2015/03/02
- [Qemu-devel] [PATCH v3 14/16] target-s390x: Extend QMP command query-cpu-definitions, Michael Mueller, 2015/03/02
- [Qemu-devel] [PATCH v3 15/16] target-s390x: Introduce facility test routine,
Michael Mueller <=
- [Qemu-devel] [PATCH v3 04/16] target-s390x: Introduce cpu facilities, Michael Mueller, 2015/03/02
- [Qemu-devel] [PATCH v3 10/16] target-s390x: Add KVM VM attribute interface for cpu models, Michael Mueller, 2015/03/02
- [Qemu-devel] [PATCH v3 16/16] target-s390x: Enable cpu model usage, Michael Mueller, 2015/03/02
- Re: [Qemu-devel] [PATCH v3 00/16] s390x cpu model implementation, Eduardo Habkost, 2015/03/02