target-arm: Refactor CPU affinity handling

Introduces reusable definitions for CPU affinity masks/shifts and gets rid
of hardcoded magic numbers.

Signed-off-by: Pavel Fedin <p.fedin@samsung.com>
Message-id: 7e6def4d0d91ae64615cdd2035b94d408d0a23c6.1441366248.git.p.fedin@samsung.com
[PMM: folded overlong line]
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

diff --git a/target-arm/cpu-qom.h b/target-arm/cpu-qom.h
index 00c0716..25fb1ce 100644 (file)
--- a/target-arm/cpu-qom.h
+++ b/target-arm/cpu-qom.h
@@ -227,6 +227,19 @@ void arm_gt_vtimer_cb(void *opaque);
 void arm_gt_htimer_cb(void *opaque);
 void arm_gt_stimer_cb(void *opaque);
 
+#define ARM_AFF0_SHIFT 0
+#define ARM_AFF0_MASK  (0xFFULL << ARM_AFF0_SHIFT)
+#define ARM_AFF1_SHIFT 8
+#define ARM_AFF1_MASK  (0xFFULL << ARM_AFF1_SHIFT)
+#define ARM_AFF2_SHIFT 16
+#define ARM_AFF2_MASK  (0xFFULL << ARM_AFF2_SHIFT)
+#define ARM_AFF3_SHIFT 32
+#define ARM_AFF3_MASK  (0xFFULL << ARM_AFF3_SHIFT)
+
+#define ARM32_AFFINITY_MASK (ARM_AFF0_MASK|ARM_AFF1_MASK|ARM_AFF2_MASK)
+#define ARM64_AFFINITY_MASK \
+    (ARM_AFF0_MASK|ARM_AFF1_MASK|ARM_AFF2_MASK|ARM_AFF3_MASK)
+
 #ifdef TARGET_AARCH64
 int aarch64_cpu_gdb_read_register(CPUState *cpu, uint8_t *buf, int reg);
 int aarch64_cpu_gdb_write_register(CPUState *cpu, uint8_t *buf, int reg);

diff --git a/target-arm/cpu.c b/target-arm/cpu.c
index 7da29f5..d7b4445 100644 (file)
--- a/target-arm/cpu.c
+++ b/target-arm/cpu.c
@@ -456,7 +456,7 @@ static void arm_cpu_initfn(Object *obj)
      */
     Aff1 = cs->cpu_index / ARM_CPUS_PER_CLUSTER;
     Aff0 = cs->cpu_index % ARM_CPUS_PER_CLUSTER;
-    cpu->mp_affinity = (Aff1 << 8) | Aff0;
+    cpu->mp_affinity = (Aff1 << ARM_AFF1_SHIFT) | Aff0;
 
 #ifndef CONFIG_USER_ONLY
     /* Our inbound IRQ and FIQ lines */

diff --git a/target-arm/kvm32.c b/target-arm/kvm32.c
index 421ce0e..3ae57a6 100644 (file)
--- a/target-arm/kvm32.c
+++ b/target-arm/kvm32.c
@@ -181,7 +181,6 @@ int kvm_arm_cpreg_level(uint64_t regidx)
     return KVM_PUT_RUNTIME_STATE;
 }
 
-#define ARM_MPIDR_HWID_BITMASK 0xFFFFFF
 #define ARM_CPU_ID_MPIDR       0, 0, 0, 5
 
 int kvm_arch_init_vcpu(CPUState *cs)
@@ -234,7 +233,7 @@ int kvm_arch_init_vcpu(CPUState *cs)
     if (ret) {
         return ret;
     }
-    cpu->mp_affinity = mpidr & ARM_MPIDR_HWID_BITMASK;
+    cpu->mp_affinity = mpidr & ARM32_AFFINITY_MASK;
 
     return kvm_arm_init_cpreg_list(cpu);
 }

diff --git a/target-arm/kvm64.c b/target-arm/kvm64.c
index bd60889..ceebfeb 100644 (file)
--- a/target-arm/kvm64.c
+++ b/target-arm/kvm64.c
@@ -77,7 +77,6 @@ bool kvm_arm_get_host_cpu_features(ARMHostCPUClass *ahcc)
     return true;
 }
 
-#define ARM_MPIDR_HWID_BITMASK 0xFF00FFFFFFULL
 #define ARM_CPU_ID_MPIDR       3, 0, 0, 0, 5
 
 int kvm_arch_init_vcpu(CPUState *cs)
@@ -120,7 +119,7 @@ int kvm_arch_init_vcpu(CPUState *cs)
     if (ret) {
         return ret;
     }
-    cpu->mp_affinity = mpidr & ARM_MPIDR_HWID_BITMASK;
+    cpu->mp_affinity = mpidr & ARM64_AFFINITY_MASK;
 
     return kvm_arm_init_cpreg_list(cpu);
 }