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From: Michael Mueller <mimu@linux.vnet.ibm.com>
To: qemu-devel@nongnu.org, kvm@vger.kernel.org,
	linux-s390@vger.kernel.org, linux-kernel@vger.kernel.org
Cc: Gleb Natapov <gleb@kernel.org>, Alexander Graf <agraf@suse.de>,
	Christian Borntraeger <borntraeger@de.ibm.com>,
	"Jason J. Herne" <jjherne@linux.vnet.ibm.com>,
	Cornelia Huck <cornelia.huck@de.ibm.com>,
	Paolo Bonzini <pbonzini@redhat.com>,
	Andreas Faerber <afaerber@suse.de>,
	Richard Henderson <rth@twiddle.net>,
	Eduardo Habkost <ehabkost@redhat.com>,
	Michael Mueller <mimu@linux.vnet.ibm.com>
Subject: [PATCH v3 15/16] target-s390x: Introduce facility test routine
Date: Mon,  2 Mar 2015 13:44:07 +0100	[thread overview]
Message-ID: <1425300248-40277-16-git-send-email-mimu@linux.vnet.ibm.com> (raw)
In-Reply-To: <1425300248-40277-1-git-send-email-mimu@linux.vnet.ibm.com>

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(+)

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


  parent reply	other threads:[~2015-03-02 12:45 UTC|newest]

Thread overview: 29+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2015-03-02 12:43 [PATCH v3 00/16] s390x cpu model implementation Michael Mueller
2015-03-02 12:43 ` [PATCH v3 01/16] Introduce probe mode for machine type none Michael Mueller
2015-03-02 13:57   ` Andreas Färber
2015-03-02 16:43     ` [Qemu-devel] " Michael Mueller
2015-03-02 16:57       ` Andreas Färber
2015-03-03 10:55         ` Michael Mueller
2015-03-04 19:19           ` Eduardo Habkost
2015-03-05 14:56             ` Michael Mueller
2015-03-05 15:07               ` Eduardo Habkost
2015-03-02 19:17   ` Eduardo Habkost
2015-03-03 10:23     ` [Qemu-devel] " Michael Mueller
2015-03-02 12:43 ` [PATCH v3 02/16] Introduce option --probe to switch into probe mode Michael Mueller
2015-03-02 12:43 ` [PATCH v3 03/16] Introduce stub routine cpu_desc_avail Michael Mueller
2015-03-02 12:43 ` [PATCH v3 04/16] target-s390x: Introduce cpu facilities Michael Mueller
2015-03-02 12:43 ` [PATCH v3 05/16] target-s390x: Generate facility defines per cpu model Michael Mueller
2015-03-02 12:43 ` [PATCH v3 06/16] target-s390x: Introduce cpu models Michael Mueller
2015-03-02 12:43 ` [PATCH v3 07/16] target-s390x: Define cpu model specific facility lists Michael Mueller
2015-03-02 12:44 ` [PATCH v3 08/16] target-s390x: Add cpu model alias definition routines Michael Mueller
2015-03-02 12:44 ` [PATCH v3 09/16] target-s390x: Update linux-headers/asm-s390/kvm.h Michael Mueller
2015-03-02 12:44 ` [PATCH v3 10/16] target-s390x: Add KVM VM attribute interface for cpu models Michael Mueller
2015-03-02 12:44 ` [PATCH v3 11/16] target-s390x: Add cpu class initialization routines Michael Mueller
2015-03-02 12:44 ` [PATCH v3 12/16] target-s390x: Prepare accelerator during cpu object realization Michael Mueller
2015-03-02 12:44 ` [PATCH v3 13/16] target-s390x: New QMP command query-cpu-model Michael Mueller
2015-03-02 12:44 ` [PATCH v3 14/16] target-s390x: Extend QMP command query-cpu-definitions Michael Mueller
2015-03-02 19:11   ` Eduardo Habkost
2015-03-04  9:00     ` [Qemu-devel] " Michael Mueller
2015-03-02 12:44 ` Michael Mueller [this message]
2015-03-02 12:44 ` [PATCH v3 16/16] target-s390x: Enable cpu model usage Michael Mueller
2015-03-02 19:25 ` [PATCH v3 00/16] s390x cpu model implementation Eduardo Habkost

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