Re: [Qemu-devel] [PATCH 2/2] migration: Make savevm.c target independent

["Dr. David Alan Gilbert" <dgilbert@redhat.com>]

* Juan Quintela (quintela@redhat.com) wrote:
> It only needed TARGET_PAGE_SIZE/BITS/BITS_MIN values, so just export
> them from exec.h
> 
> Signed-off-by: Juan Quintela <quintela@redhat.com>

Reviewed-by: Dr. David Alan Gilbert <dgilbert@redhat.com>

> ---
>  Makefile.target            |  2 +-
>  exec.c                     |  9 +++++++++
>  include/exec/target_page.h |  2 ++
>  migration/Makefile.objs    |  2 +-
>  migration/savevm.c         | 14 +++++++-------
>  5 files changed, 20 insertions(+), 9 deletions(-)
> 
> diff --git a/Makefile.target b/Makefile.target
> index 465a633..ce8dfe4 100644
> --- a/Makefile.target
> +++ b/Makefile.target
> @@ -146,7 +146,7 @@ obj-$(CONFIG_KVM) += kvm-all.o
>  obj-y += memory.o cputlb.o
>  obj-y += memory_mapping.o
>  obj-y += dump.o
> -obj-y += migration/ram.o migration/savevm.o
> +obj-y += migration/ram.o
>  LIBS := $(libs_softmmu) $(LIBS)
>  
>  # Hardware support
> diff --git a/exec.c b/exec.c
> index e9a201a..447ac63 100644
> --- a/exec.c
> +++ b/exec.c
> @@ -3387,6 +3387,15 @@ size_t qemu_target_page_size(void)
>      return TARGET_PAGE_SIZE;
>  }
>  
> +int qemu_target_page_bits(void)
> +{
> +    return TARGET_PAGE_BITS;
> +}
> +
> +int qemu_target_page_bits_min(void)
> +{
> +    return TARGET_PAGE_BITS_MIN;
> +}
>  #endif
>  
>  /*
> diff --git a/include/exec/target_page.h b/include/exec/target_page.h
> index 0961591..e3a19cc 100644
> --- a/include/exec/target_page.h
> +++ b/include/exec/target_page.h
> @@ -16,5 +16,7 @@
>  #define EXEC_TARGET_PAGE_H
>  
>  size_t qemu_target_page_size(void);
> +int qemu_target_page_bits(void);
> +int qemu_target_page_bits_min(void);
>  
>  #endif
> diff --git a/migration/Makefile.objs b/migration/Makefile.objs
> index 3272415..90f8c1f 100644
> --- a/migration/Makefile.objs
> +++ b/migration/Makefile.objs
> @@ -1,5 +1,5 @@
>  common-obj-y += migration.o socket.o fd.o exec.o
> -common-obj-y += tls.o channel.o
> +common-obj-y += tls.o channel.o savevm.o
>  common-obj-y += colo-comm.o colo.o colo-failover.o
>  common-obj-y += vmstate.o vmstate-types.o page_cache.o
>  common-obj-y += qemu-file.o
> diff --git a/migration/savevm.c b/migration/savevm.c
> index 8763700..d971e5e 100644
> --- a/migration/savevm.c
> +++ b/migration/savevm.c
> @@ -27,7 +27,6 @@
>   */
>  
>  #include "qemu/osdep.h"
> -#include "cpu.h"
>  #include "hw/boards.h"
>  #include "hw/hw.h"
>  #include "hw/qdev.h"
> @@ -288,7 +287,7 @@ static void configuration_pre_save(void *opaque)
>  
>      state->len = strlen(current_name);
>      state->name = current_name;
> -    state->target_page_bits = TARGET_PAGE_BITS;
> +    state->target_page_bits = qemu_target_page_bits();
>  }
>  
>  static int configuration_pre_load(void *opaque)
> @@ -299,7 +298,7 @@ static int configuration_pre_load(void *opaque)
>       * predates the variable-target-page-bits support and is using the
>       * minimum possible value for this CPU.
>       */
> -    state->target_page_bits = TARGET_PAGE_BITS_MIN;
> +    state->target_page_bits = qemu_target_page_bits_min();
>      return 0;
>  }
>  
> @@ -314,9 +313,9 @@ static int configuration_post_load(void *opaque, int version_id)
>          return -EINVAL;
>      }
>  
> -    if (state->target_page_bits != TARGET_PAGE_BITS) {
> +    if (state->target_page_bits != qemu_target_page_bits()) {
>          error_report("Received TARGET_PAGE_BITS is %d but local is %d",
> -                     state->target_page_bits, TARGET_PAGE_BITS);
> +                     state->target_page_bits, qemu_target_page_bits());
>          return -EINVAL;
>      }
>  
> @@ -332,7 +331,8 @@ static int configuration_post_load(void *opaque, int version_id)
>   */
>  static bool vmstate_target_page_bits_needed(void *opaque)
>  {
> -    return TARGET_PAGE_BITS > TARGET_PAGE_BITS_MIN;
> +    return qemu_target_page_bits()
> +        > qemu_target_page_bits_min();
>  }
>  
>  static const VMStateDescription vmstate_target_page_bits = {
> @@ -1138,7 +1138,7 @@ void qemu_savevm_state_complete_precopy(QEMUFile *f, bool iterable_only)
>      }
>  
>      vmdesc = qjson_new();
> -    json_prop_int(vmdesc, "page_size", TARGET_PAGE_SIZE);
> +    json_prop_int(vmdesc, "page_size", qemu_target_page_size());
>      json_start_array(vmdesc, "devices");
>      QTAILQ_FOREACH(se, &savevm_state.handlers, entry) {
>  
> -- 
> 2.9.3
> 
--
Dr. David Alan Gilbert / dgilbert@redhat.com / Manchester, UK