VCPU: add exit reason KVM_EXIT_SYNC_SREGS

Signed-off-by: chaojixx <[email protected]>

src/s2e-kvm-vcpu.cpp

@@ -393,7 +393,8 @@ int VCPU::run(int vcpu_fd) {
     m_handlingKvmCallback =
         m_cpuBuffer->exit_reason == KVM_EXIT_IO || m_cpuBuffer->exit_reason == KVM_EXIT_MMIO ||
         m_cpuBuffer->exit_reason == KVM_EXIT_FLUSH_DISK || m_cpuBuffer->exit_reason == KVM_EXIT_SAVE_DEV_STATE ||
-        m_cpuBuffer->exit_reason == KVM_EXIT_RESTORE_DEV_STATE || m_cpuBuffer->exit_reason == KVM_EXIT_CLONE_PROCESS;
+        m_cpuBuffer->exit_reason == KVM_EXIT_RESTORE_DEV_STATE || m_cpuBuffer->exit_reason == KVM_EXIT_CLONE_PROCESS ||
+        m_cpuBuffer->exit_reason == KVM_EXIT_SYNC_SREGS;
 
 // Might not be NULL if resuming from an interrupted I/O
 // assert(env->current_tb == NULL);
@@ -504,6 +505,12 @@ void VCPU::restoreDeviceState(void) {
     coroutine_yield();
 }
 
+void VCPU::syncSRegs(void) {
+    g_kvm_vcpu_buffer->exit_reason = KVM_EXIT_SYNC_SREGS;
+    m_handlingDeviceState = true;
+    coroutine_yield();
+}
+
 void VCPU::cloneProcess(void) {
     g_kvm_vcpu_buffer->exit_reason = KVM_EXIT_CLONE_PROCESS;
 
@@ -838,6 +845,10 @@ void s2e_kvm_restore_device_state(void) {
     s2e::kvm::s_vcpu->restoreDeviceState();
 }
 
+void s2e_kvm_sync_sregs(void) {
+    s2e::kvm::s_vcpu->syncSRegs();
+}
+
 void s2e_kvm_clone_process(void) {
     s2e::kvm::s_vcpu->cloneProcess();
 }

src/s2e-kvm-vcpu.h

@@ -194,6 +194,7 @@ class VCPU : public IFile {
     void flushDisk(void);
     void saveDeviceState(void);
     void restoreDeviceState(void);
+    void syncSRegs(void);
     void cloneProcess(void);
 
 #if defined(TARGET_ARM)