[Qemu-devel] [PATCH 05/12] target-i386: push hot-plugged VCPU state to KVM and unstop it

[Igor Mammedov <imammedo@redhat.com>]

 * synchronize CPU state to KVM
 * resume CPU, it makes CPU be able to handle interrupts in TCG mode
   and/or with user-space APIC.

Signed-off-by: Igor Mammedov <imammedo@redhat.com>
---
 cpus.c                |   11 ++++++++---
 include/sysemu/cpus.h |    3 +++
 stubs/Makefile.objs   |    1 +
 stubs/resume_vcpu.c   |    6 ++++++
 target-i386/cpu.c     |    5 +++++
 5 files changed, 23 insertions(+), 3 deletions(-)
 create mode 100644 stubs/resume_vcpu.c

diff --git a/cpus.c b/cpus.c
index e919dd7..ae479bf 100644
--- a/cpus.c
+++ b/cpus.c
@@ -973,6 +973,13 @@ void pause_all_vcpus(void)
     }
 }
 
+void resume_vcpu(CPUState *cpu)
+{
+    cpu->stop = false;
+    cpu->stopped = false;
+    qemu_cpu_kick(cpu);
+}
+
 void resume_all_vcpus(void)
 {
     CPUArchState *penv = first_cpu;
@@ -980,9 +987,7 @@ void resume_all_vcpus(void)
     qemu_clock_enable(vm_clock, true);
     while (penv) {
         CPUState *pcpu = ENV_GET_CPU(penv);
-        pcpu->stop = false;
-        pcpu->stopped = false;
-        qemu_cpu_kick(pcpu);
+        resume_vcpu(pcpu);
         penv = penv->next_cpu;
     }
 }
diff --git a/include/sysemu/cpus.h b/include/sysemu/cpus.h
index 6502488..9437df5 100644
--- a/include/sysemu/cpus.h
+++ b/include/sysemu/cpus.h
@@ -1,11 +1,14 @@
 #ifndef QEMU_CPUS_H
 #define QEMU_CPUS_H
 
+#include "qom/cpu.h"
+
 /* cpus.c */
 void qemu_init_cpu_loop(void);
 void resume_all_vcpus(void);
 void pause_all_vcpus(void);
 void cpu_stop_current(void);
+void resume_vcpu(CPUState *cpu);
 
 void cpu_synchronize_all_states(void);
 void cpu_synchronize_all_post_reset(void);
diff --git a/stubs/Makefile.objs b/stubs/Makefile.objs
index 9c55b34..28fb4f8 100644
--- a/stubs/Makefile.objs
+++ b/stubs/Makefile.objs
@@ -23,3 +23,4 @@ stub-obj-y += sysbus.o
 stub-obj-y += vm-stop.o
 stub-obj-y += vmstate.o
 stub-obj-$(CONFIG_WIN32) += fd-register.o
+stub-obj-y += resume_vcpu.o
diff --git a/stubs/resume_vcpu.c b/stubs/resume_vcpu.c
new file mode 100644
index 0000000..383b71a
--- /dev/null
+++ b/stubs/resume_vcpu.c
@@ -0,0 +1,6 @@
+#include "qemu-common.h"
+#include "sysemu/cpus.h"
+
+void resume_vcpu(CPUState *cpu)
+{
+}
diff --git a/target-i386/cpu.c b/target-i386/cpu.c
index d03ff73..631bcd8 100644
--- a/target-i386/cpu.c
+++ b/target-i386/cpu.c
@@ -2260,6 +2260,11 @@ out:
         error_propagate(errp, local_err);
         return;
     }
+
+    if (dev->hotplugged) {
+        cpu_synchronize_post_init(env);
+        resume_vcpu(CPU(cpu));
+    }
 }
 
 /* Enables contiguous-apic-ID mode, for compatibility */
-- 
1.7.1