Re: [Qemu-devel] [PATCH 05/22] cpu: call cpu_synchronize_post_init() from CPUClass.realize() if hotplugged

[Igor Mammedov <imammedo@redhat.com>]

On Mon, 8 Apr 2013 16:45:01 -0300
Eduardo Habkost <ehabkost@redhat.com> wrote:

> On Fri, Apr 05, 2013 at 04:36:57PM +0200, Igor Mammedov wrote:
> > ... to synchronize CPU state to KVM
> > 
> > * in addition link kvm-stub.o to *-user target and fix related compiling
> > issues.
> > 
> > Signed-off-by: Igor Mammedov <imammedo@redhat.com>
> > ---
> >  Makefile.target      |  6 ++++++
> >  include/sysemu/kvm.h | 22 ++++++++++++----------
> >  kvm-all.c            |  1 +
> >  kvm-stub.c           |  5 +++++
> >  qom/cpu.c            |  4 ++++
> >  vl.c                 |  1 -
> >  6 files changed, 28 insertions(+), 11 deletions(-)
> > 
> > diff --git a/Makefile.target b/Makefile.target
> > index 2bd6d14..0c2c24a 100644
> > --- a/Makefile.target
> > +++ b/Makefile.target
> > @@ -76,6 +76,12 @@ obj-y += disas.o
> >  obj-$(CONFIG_GDBSTUB_XML) += gdbstub-xml.o
> >  
> >  #########################################################
> > +# user emulator target
> > +ifdef CONFIG_USER_ONLY
> > +obj-y += kvm-stub.o
> > +endif #CONFIG_USER_ONLY
> 
> Why you didn't include it on libqemustub instead? You said on a previous
> thread that it is not possible to include all of kvm-stub.c into
> libqemustub. Why not?
It wasn't possible, but after this patch it's, I guess.
Paolo objected to including CPU related stuff in libqemustub, hence
this hunk in Makefile.

> 
> > +
> > +#########################################################
> >  # Linux user emulator target
> >  
> >  ifdef CONFIG_LINUX_USER
> > diff --git a/include/sysemu/kvm.h b/include/sysemu/kvm.h
> > index 495e6f8..8534e44 100644
> > --- a/include/sysemu/kvm.h
> > +++ b/include/sysemu/kvm.h
> > @@ -144,10 +144,10 @@ int kvm_cpu_exec(CPUArchState *env);
> >  #if !defined(CONFIG_USER_ONLY)
> >  void *kvm_vmalloc(ram_addr_t size);
> >  void *kvm_arch_vmalloc(ram_addr_t size);
> > -void kvm_setup_guest_memory(void *start, size_t size);
> > +#endif
> >  
> > +void kvm_setup_guest_memory(void *start, size_t size);
> >  void kvm_flush_coalesced_mmio_buffer(void);
> > -#endif
> >  
> >  int kvm_insert_breakpoint(CPUArchState *current_env, target_ulong addr,
> >                            target_ulong len, int type);
> > @@ -250,8 +250,6 @@ int kvm_check_extension(KVMState *s, unsigned int
> > extension); uint32_t kvm_arch_get_supported_cpuid(KVMState *env, uint32_t
> > function, uint32_t index, int reg);
> >  void kvm_cpu_synchronize_state(CPUArchState *env);
> > -void kvm_cpu_synchronize_post_reset(CPUState *cpu);
> > -void kvm_cpu_synchronize_post_init(CPUState *cpu);
> >  
> >  /* generic hooks - to be moved/refactored once there are more users */
> >  
> > @@ -262,6 +260,16 @@ static inline void
> > cpu_synchronize_state(CPUArchState *env) }
> >  }
> >  
> > +#if !defined(CONFIG_USER_ONLY)
> > +int kvm_physical_memory_addr_from_host(KVMState *s, void *ram_addr,
> > +                                       hwaddr *phys_addr);
> > +#endif
> > +
> > +#endif
> > +
> > +void kvm_cpu_synchronize_post_reset(CPUState *cpu);
> > +void kvm_cpu_synchronize_post_init(CPUState *cpu);
> > +
> >  static inline void cpu_synchronize_post_reset(CPUState *cpu)
> >  {
> >      if (kvm_enabled()) {
> > @@ -277,12 +285,6 @@ static inline void
> > cpu_synchronize_post_init(CPUState *cpu) }
> >  
> >  
> > -#if !defined(CONFIG_USER_ONLY)
> > -int kvm_physical_memory_addr_from_host(KVMState *s, void *ram_addr,
> > -                                       hwaddr *phys_addr);
> > -#endif
> > -
> > -#endif
> >  int kvm_set_ioeventfd_mmio(int fd, uint32_t adr, uint32_t val, bool
> > assign, uint32_t size);
> >  
> > diff --git a/kvm-all.c b/kvm-all.c
> > index fc4e17c..1d17128 100644
> > --- a/kvm-all.c
> > +++ b/kvm-all.c
> > @@ -109,6 +109,7 @@ bool kvm_async_interrupts_allowed;
> >  bool kvm_irqfds_allowed;
> >  bool kvm_msi_via_irqfd_allowed;
> >  bool kvm_gsi_routing_allowed;
> > +bool kvm_allowed;
> >  
> >  static const KVMCapabilityInfo kvm_required_capabilites[] = {
> >      KVM_CAP_INFO(USER_MEMORY),
> > diff --git a/kvm-stub.c b/kvm-stub.c
> > index 82875dd..f3e9438 100644
> > --- a/kvm-stub.c
> > +++ b/kvm-stub.c
> > @@ -12,7 +12,9 @@
> >  
> >  #include "qemu-common.h"
> >  #include "hw/hw.h"
> > +#ifndef CONFIG_USER_ONLY
> >  #include "hw/pci/msi.h"
> > +#endif
> >  #include "cpu.h"
> >  #include "exec/gdbstub.h"
> >  #include "sysemu/kvm.h"
> > @@ -23,6 +25,7 @@ bool kvm_async_interrupts_allowed;
> >  bool kvm_irqfds_allowed;
> >  bool kvm_msi_via_irqfd_allowed;
> >  bool kvm_gsi_routing_allowed;
> > +bool kvm_allowed;
> >  
> >  int kvm_init_vcpu(CPUState *cpu)
> >  {
> > @@ -122,6 +125,7 @@ int kvm_on_sigbus(int code, void *addr)
> >      return 1;
> >  }
> >  
> > +#ifndef CONFIG_USER_ONLY
> >  int kvm_irqchip_add_msi_route(KVMState *s, MSIMessage msg)
> >  {
> >      return -ENOSYS;
> > @@ -145,3 +149,4 @@ int kvm_irqchip_remove_irqfd_notifier(KVMState *s,
> > EventNotifier *n, int virq) {
> >      return -ENOSYS;
> >  }
> > +#endif
> > diff --git a/qom/cpu.c b/qom/cpu.c
> > index e242dcb..0c76712 100644
> > --- a/qom/cpu.c
> > +++ b/qom/cpu.c
> > @@ -20,6 +20,7 @@
> >  
> >  #include "qom/cpu.h"
> >  #include "qemu-common.h"
> > +#include "sysemu/kvm.h"
> >  
> >  void cpu_reset_interrupt(CPUState *cpu, int mask)
> >  {
> > @@ -57,6 +58,9 @@ static ObjectClass *cpu_common_class_by_name(const char
> > *cpu_model) 
> >  static void cpu_common_realizefn(DeviceState *dev, Error **errp)
> >  {
> > +    if (dev->hotplugged) {
> > +        cpu_synchronize_post_init(CPU(dev)); +    } }
> >  
> >  static void cpu_class_init(ObjectClass *klass, void *data) diff --git
> >  a/vl.c b/vl.c index a8bba04..97f0349 100644 --- a/vl.c +++ b/vl.c @@
> >  -267,7 +267,6 @@ static NotifierList machine_init_done_notifiers =
> >  NOTIFIER_LIST_INITIALIZER(machine_init_done_notifiers);
> >  
> >  static bool tcg_allowed = true; -bool kvm_allowed; bool xen_allowed;
> >  uint32_t xen_domid; enum xen_mode xen_mode = XEN_EMULATE; -- 
> > 1.8.1.4
> > 
>