Adds various utility functions which might be required to fetch or check the
state of the possible vcpus. This also introduces concept of *disabled* vcpus,
which are part of the *possible* vcpus but are not part of the *present* vcpu.
This state shall be used during machine init time to check the presence of
vcpus.
Co-developed-by: Keqian Zhu <zhukeqi...@huawei.com>
Signed-off-by: Salil Mehta <salil.me...@huawei.com>
---
cpus-common.c | 20 ++++++++++++++++++++
include/hw/core/cpu.h | 21 +++++++++++++++++++++
2 files changed, 41 insertions(+)
diff --git a/cpus-common.c b/cpus-common.c
index 70a9d12981..7cf900289b 100644
--- a/cpus-common.c
+++ b/cpus-common.c
@@ -23,6 +23,7 @@
#include "hw/core/cpu.h"
#include "sysemu/cpus.h"
#include "qemu/lockable.h"
+#include "hw/boards.h"
static QemuMutex qemu_cpu_list_lock;
static QemuCond exclusive_cond;
@@ -82,6 +83,25 @@ void cpu_list_add(CPUState *cpu)
assert(!cpu_index_auto_assigned);
}
QTAILQ_INSERT_TAIL_RCU(&cpus, cpu, node);
+ qemu_mutex_unlock(&qemu_cpu_list_lock);
+}
+
+CPUState *qemu_get_possible_cpu(int index)
+{
+ MachineState *ms = MACHINE(qdev_get_machine());
+ const CPUArchIdList *possible_cpus = ms->possible_cpus;
+ CPUState *cpu;
+
+ assert((index >= 0) && (index < possible_cpus->len));
+
+ cpu = CPU(possible_cpus->cpus[index].cpu);
+
+ return cpu;
+}
+
+bool qemu_present_cpu(CPUState *cpu)
+{
+ return (cpu && !cpu->disabled);
}
void cpu_list_remove(CPUState *cpu)
diff --git a/include/hw/core/cpu.h b/include/hw/core/cpu.h
index 497600c49e..d9cae71ea5 100644
--- a/include/hw/core/cpu.h
+++ b/include/hw/core/cpu.h
@@ -419,6 +419,7 @@ struct CPUState {
GArray *plugin_mem_cbs;
+ bool disabled;
/* TODO Move common fields from CPUArchState here. */
int cpu_index;
int cluster_index;
@@ -802,6 +803,26 @@ static inline bool cpu_in_exclusive_context(const CPUState
*cpu)
*/
CPUState *qemu_get_cpu(int index);
+/**
+ * qemu_get_possible_cpu:
+ * @index: The CPUState@cpu_index value of the CPU to obtain.
+ *
+ * Gets a CPU matching @index.
+ *
+ * Returns: The possible CPU or %NULL if there is no matching CPU.
+ */
+CPUState *qemu_get_possible_cpu(int index);
+
+/**
+ * qemu_present_cpu:
+ * @cpu: The vCPU to check
+ *
+ * Checks if the vcpu is amongst the present possible vcpus.
+ *
+ * Returns: True if it is present possible vcpu else false
+ */
+bool qemu_present_cpu(CPUState *cpu);
+
/**
* cpu_exists:
* @id: Guest-exposed CPU ID to lookup.
--
2.17.1
