Re: [PATCH V4 1/3] hw/arm, loongarch: Move load_image_to_fw_cfg() to common location

[Sunil V L <sunilvl@ventanamicro.com>]

Hi,

Could maintainers of hw/arm and hw/loongarch to take a look at this? I
have addressed Peter's earlier comment.

Thanks
Sunil

On Thu, Sep 08, 2022 at 11:17:52AM +0200, Alistair Francis wrote:
> On Tue, Sep 6, 2022 at 11:38 AM Sunil V L <sunilvl@ventanamicro.com> wrote:
> >
> > load_image_to_fw_cfg() is duplicated by both arm and loongarch. The same
> > function will be required by riscv too. So, it's time to refactor and
> > move this function to a common path.
> >
> > Signed-off-by: Sunil V L <sunilvl@ventanamicro.com>
> > Reviewed-by: Andrew Jones <ajones@ventanamicro.com>
> 
> Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
> 
> Alistair
> 
> > ---
> >  hw/arm/boot.c             | 49 ---------------------------------------
> >  hw/loongarch/virt.c       | 33 --------------------------
> >  hw/nvram/fw_cfg.c         | 32 +++++++++++++++++++++++++
> >  include/hw/nvram/fw_cfg.h | 21 +++++++++++++++++
> >  4 files changed, 53 insertions(+), 82 deletions(-)
> >
> > diff --git a/hw/arm/boot.c b/hw/arm/boot.c
> > index ada2717f76..704f368d9c 100644
> > --- a/hw/arm/boot.c
> > +++ b/hw/arm/boot.c
> > @@ -818,55 +818,6 @@ static void do_cpu_reset(void *opaque)
> >      }
> >  }
> >
> > -/**
> > - * load_image_to_fw_cfg() - Load an image file into an fw_cfg entry identified
> > - *                          by key.
> > - * @fw_cfg:         The firmware config instance to store the data in.
> > - * @size_key:       The firmware config key to store the size of the loaded
> > - *                  data under, with fw_cfg_add_i32().
> > - * @data_key:       The firmware config key to store the loaded data under,
> > - *                  with fw_cfg_add_bytes().
> > - * @image_name:     The name of the image file to load. If it is NULL, the
> > - *                  function returns without doing anything.
> > - * @try_decompress: Whether the image should be decompressed (gunzipped) before
> > - *                  adding it to fw_cfg. If decompression fails, the image is
> > - *                  loaded as-is.
> > - *
> > - * In case of failure, the function prints an error message to stderr and the
> > - * process exits with status 1.
> > - */
> > -static void load_image_to_fw_cfg(FWCfgState *fw_cfg, uint16_t size_key,
> > -                                 uint16_t data_key, const char *image_name,
> > -                                 bool try_decompress)
> > -{
> > -    size_t size = -1;
> > -    uint8_t *data;
> > -
> > -    if (image_name == NULL) {
> > -        return;
> > -    }
> > -
> > -    if (try_decompress) {
> > -        size = load_image_gzipped_buffer(image_name,
> > -                                         LOAD_IMAGE_MAX_GUNZIP_BYTES, &data);
> > -    }
> > -
> > -    if (size == (size_t)-1) {
> > -        gchar *contents;
> > -        gsize length;
> > -
> > -        if (!g_file_get_contents(image_name, &contents, &length, NULL)) {
> > -            error_report("failed to load \"%s\"", image_name);
> > -            exit(1);
> > -        }
> > -        size = length;
> > -        data = (uint8_t *)contents;
> > -    }
> > -
> > -    fw_cfg_add_i32(fw_cfg, size_key, size);
> > -    fw_cfg_add_bytes(fw_cfg, data_key, data, size);
> > -}
> > -
> >  static int do_arm_linux_init(Object *obj, void *opaque)
> >  {
> >      if (object_dynamic_cast(obj, TYPE_ARM_LINUX_BOOT_IF)) {
> > diff --git a/hw/loongarch/virt.c b/hw/loongarch/virt.c
> > index 5cc0b05538..eee2c193c0 100644
> > --- a/hw/loongarch/virt.c
> > +++ b/hw/loongarch/virt.c
> > @@ -542,39 +542,6 @@ static void reset_load_elf(void *opaque)
> >      }
> >  }
> >
> > -/* Load an image file into an fw_cfg entry identified by key. */
> > -static void load_image_to_fw_cfg(FWCfgState *fw_cfg, uint16_t size_key,
> > -                                 uint16_t data_key, const char *image_name,
> > -                                 bool try_decompress)
> > -{
> > -    size_t size = -1;
> > -    uint8_t *data;
> > -
> > -    if (image_name == NULL) {
> > -        return;
> > -    }
> > -
> > -    if (try_decompress) {
> > -        size = load_image_gzipped_buffer(image_name,
> > -                                         LOAD_IMAGE_MAX_GUNZIP_BYTES, &data);
> > -    }
> > -
> > -    if (size == (size_t)-1) {
> > -        gchar *contents;
> > -        gsize length;
> > -
> > -        if (!g_file_get_contents(image_name, &contents, &length, NULL)) {
> > -            error_report("failed to load \"%s\"", image_name);
> > -            exit(1);
> > -        }
> > -        size = length;
> > -        data = (uint8_t *)contents;
> > -    }
> > -
> > -    fw_cfg_add_i32(fw_cfg, size_key, size);
> > -    fw_cfg_add_bytes(fw_cfg, data_key, data, size);
> > -}
> > -
> >  static void fw_cfg_add_kernel_info(FWCfgState *fw_cfg)
> >  {
> >      /*
> > diff --git a/hw/nvram/fw_cfg.c b/hw/nvram/fw_cfg.c
> > index d605f3f45a..371a45dfe2 100644
> > --- a/hw/nvram/fw_cfg.c
> > +++ b/hw/nvram/fw_cfg.c
> > @@ -41,6 +41,7 @@
> >  #include "qapi/error.h"
> >  #include "hw/acpi/aml-build.h"
> >  #include "hw/pci/pci_bus.h"
> > +#include "hw/loader.h"
> >
> >  #define FW_CFG_FILE_SLOTS_DFLT 0x20
> >
> > @@ -1221,6 +1222,37 @@ FWCfgState *fw_cfg_find(void)
> >      return FW_CFG(object_resolve_path_type("", TYPE_FW_CFG, NULL));
> >  }
> >
> > +void load_image_to_fw_cfg(FWCfgState *fw_cfg, uint16_t size_key,
> > +                          uint16_t data_key, const char *image_name,
> > +                          bool try_decompress)
> > +{
> > +    size_t size = -1;
> > +    uint8_t *data;
> > +
> > +    if (image_name == NULL) {
> > +        return;
> > +    }
> > +
> > +    if (try_decompress) {
> > +        size = load_image_gzipped_buffer(image_name,
> > +                                         LOAD_IMAGE_MAX_GUNZIP_BYTES, &data);
> > +    }
> > +
> > +    if (size == (size_t)-1) {
> > +        gchar *contents;
> > +        gsize length;
> > +
> > +        if (!g_file_get_contents(image_name, &contents, &length, NULL)) {
> > +            error_report("failed to load \"%s\"", image_name);
> > +            exit(1);
> > +        }
> > +        size = length;
> > +        data = (uint8_t *)contents;
> > +    }
> > +
> > +    fw_cfg_add_i32(fw_cfg, size_key, size);
> > +    fw_cfg_add_bytes(fw_cfg, data_key, data, size);
> > +}
> >
> >  static void fw_cfg_class_init(ObjectClass *klass, void *data)
> >  {
> > diff --git a/include/hw/nvram/fw_cfg.h b/include/hw/nvram/fw_cfg.h
> > index 0e7a8bc7af..c1f81a5f13 100644
> > --- a/include/hw/nvram/fw_cfg.h
> > +++ b/include/hw/nvram/fw_cfg.h
> > @@ -342,4 +342,25 @@ bool fw_cfg_dma_enabled(void *opaque);
> >   */
> >  const char *fw_cfg_arch_key_name(uint16_t key);
> >
> > +/**
> > + * load_image_to_fw_cfg() - Load an image file into an fw_cfg entry identified
> > + *                          by key.
> > + * @fw_cfg:         The firmware config instance to store the data in.
> > + * @size_key:       The firmware config key to store the size of the loaded
> > + *                  data under, with fw_cfg_add_i32().
> > + * @data_key:       The firmware config key to store the loaded data under,
> > + *                  with fw_cfg_add_bytes().
> > + * @image_name:     The name of the image file to load. If it is NULL, the
> > + *                  function returns without doing anything.
> > + * @try_decompress: Whether the image should be decompressed (gunzipped) before
> > + *                  adding it to fw_cfg. If decompression fails, the image is
> > + *                  loaded as-is.
> > + *
> > + * In case of failure, the function prints an error message to stderr and the
> > + * process exits with status 1.
> > + */
> > +void load_image_to_fw_cfg(FWCfgState *fw_cfg, uint16_t size_key,
> > +                          uint16_t data_key, const char *image_name,
> > +                          bool try_decompress);
> > +
> >  #endif
> > --
> > 2.25.1
> >
> >