linux-kernel - [PATCH v5 13/17] target-s390x: Prepare accelerator during S390 CPU object realization

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Message-Id: <1428933396-37887-14-git-send-email-mimu@linux.vnet.ibm.com>
Date:	Mon, 13 Apr 2015 15:56:32 +0200
From:	Michael Mueller <mimu@...ux.vnet.ibm.com>
To:	qemu-devel@...gnu.org, kvm@...r.kernel.org,
	linux-s390@...r.kernel.org, linux-kernel@...r.kernel.org
Cc:	Eduardo Habkost <ehabkost@...hat.com>,
	Gleb Natapov <gleb@...nel.org>, Alexander Graf <agraf@...e.de>,
	Christian Borntraeger <borntraeger@...ibm.com>,
	"Jason J. Herne" <jjherne@...ux.vnet.ibm.com>,
	Cornelia Huck <cornelia.huck@...ibm.com>,
	Paolo Bonzini <pbonzini@...hat.com>,
	Michael Mueller <mimu@...ux.vnet.ibm.com>,
	Andreas Faerber <afaerber@...e.de>,
	Richard Henderson <rth@...ddle.net>,
	Daniel Hansel <daniel.hansel@...ux.vnet.ibm.com>
Subject: [PATCH v5 13/17] target-s390x: Prepare accelerator during S390 CPU object realization

This patch implements routine s390_cpu_model_init(). It is called by the
realize function during instantiation of an CPU object. Its task is to
initialize the current accelerator with the properties of the selected
processor model.

Signed-off-by: Michael Mueller <mimu@...ux.vnet.ibm.com>
---
 target-s390x/cpu-models.c | 30 ++++++++++++++++++++++++++++++
 target-s390x/cpu-models.h |  4 ++++
 target-s390x/cpu.c        |  1 +
 3 files changed, 35 insertions(+)

diff --git a/target-s390x/cpu-models.c b/target-s390x/cpu-models.c
index 07039c0..fa74a8a 100644
--- a/target-s390x/cpu-models.c
+++ b/target-s390x/cpu-models.c
@@ -670,3 +670,33 @@ uint64_t *s390_current_fac_list_mask(void)
     return s390_fac_list_mask_by_machine(mc->name);
 }
 #endif
+
+/**
+ * s390_cpu_model_init:
+ * @cc: S390 CPU class
+ *
+ * This function intitializes the current accelerator with processor
+ * related properties.
+ *
+ * Since: 2.4
+ */
+void s390_cpu_model_init(S390CPUClass *cc)
+{
+    S390ProcessorProps proc = {
+        .cpuid = cpuid(cc->proc),
+        .ibc = cc->proc.ibc,
+    };
+
+    /* none cpu model case */
+    if (!proc.cpuid) {
+        return;
+    }
+
+    bitmap_zero(proc.fac_list, FAC_LIST_ARCH_S390_SIZE_UINT1);
+    bitmap_copy(proc.fac_list, cc->fac_list[ACCEL_CURRENT],
+                FAC_LIST_CPU_S390_SIZE_UINT1);
+
+    if (kvm_enabled()) {
+        kvm_s390_set_processor_props(&proc);
+    }
+}
diff --git a/target-s390x/cpu-models.h b/target-s390x/cpu-models.h
index 00454d3..c24550b 100644
--- a/target-s390x/cpu-models.h
+++ b/target-s390x/cpu-models.h
@@ -45,6 +45,9 @@
 #define type_cpuid(x)     ((uint64_t)((x) & 0xffff) << 16)
 #define id_cpuid(x)       ((uint64_t)((x) & 0xffffff) << 32)
 #define ver_cpuid(x)      ((uint64_t)((x) & 0xff) << 56)
+#define cpuid(x)          (ver_cpuid(x.ver) |  \
+                           id_cpuid(x.id) |    \
+                           type_cpuid(x.type))
 
 #define oldest_ibc(x)     (((uint32_t)(x) >> 16) & 0xfff)
 #define newest_ibc(x)     ((uint32_t)(x) & 0xfff)
@@ -88,6 +91,7 @@ void s390_cpu_list_entry(gpointer data, gpointer user_data);
 bool s390_cpu_classes_initialized(void);
 uint64_t *s390_fac_list_mask_by_machine(const char *name);
 uint64_t *s390_current_fac_list_mask(void);
+void s390_cpu_model_init(S390CPUClass *cc);
 
 #ifdef CONFIG_KVM
 int kvm_s390_get_processor_props(S390ProcessorProps *prop);
diff --git a/target-s390x/cpu.c b/target-s390x/cpu.c
index cbab627..65dee3e 100644
--- a/target-s390x/cpu.c
+++ b/target-s390x/cpu.c
@@ -184,6 +184,7 @@ static void s390_cpu_realizefn(DeviceState *dev, Error **errp)
     CPUState *cs = CPU(dev);
     S390CPUClass *scc = S390_CPU_GET_CLASS(dev);
 
+    s390_cpu_model_init(scc);
     s390_cpu_gdb_init(cs);
     qemu_init_vcpu(cs);
 #if !defined(CONFIG_USER_ONLY)
-- 
1.8.3.1

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