Re: [Qemu-devel] [PATCH 25/27] pc: ACPI BIOS: use enum for defining memory affinity flags

[Igor Mammedov <imammedo@redhat.com>]

On Thu, 21 Nov 2013 09:20:18 +0200
"Michael S. Tsirkin" <mst@redhat.com> wrote:

> On Thu, Nov 21, 2013 at 03:38:46AM +0100, Igor Mammedov wrote:
> > replace magic numbers with enum describing Flags field of
> > memory affinity in SRAT table.
> > 
> > MemoryAffinityFlags enum will define flags decribed by:
> >  ACPI spec 5.0, "5.2.16.2 Memory Affinity Structure",
> >  "Table 5-69 Flags - Memory Affinity Structure"
> > 
> > Signed-off-by: Igor Mammedov <imammedo@redhat.com>
> > ---
> >  hw/i386/acpi-build.c |   22 +++++++++++++++-------
> >  1 files changed, 15 insertions(+), 7 deletions(-)
> > 
> > diff --git a/hw/i386/acpi-build.c b/hw/i386/acpi-build.c
> > index d41fd81..86c1372 100644
> > --- a/hw/i386/acpi-build.c
> > +++ b/hw/i386/acpi-build.c
> > @@ -1038,15 +1038,22 @@ build_hpet(GArray *table_data, GArray *linker)
> >                   (void *)hpet, ACPI_HPET_SIGNATURE, sizeof(*hpet), 1);
> >  }
> >  
> > +typedef enum {
> > +    NOFLAGS_MEM       = 0,
> > +    ENABLED_MEM       = (1 << 0),
> > +    HOT_PLUGGABLE_MEM = (1 << 1),
> > +    NON_VOLATILE_MEM  = (1 << 2),
> > +} MemoryAffinityFlags;
> 
> Absolutely but please use prefixes not suffixes, and make them
> a bit more specific.
> E.g.  MEM_AFFINITY_NOFLAGS
I'll do it, thanks!

> 
> > +
> >  static void
> > -acpi_build_srat_memory(AcpiSratMemoryAffinity *numamem,
> > -                       uint64_t base, uint64_t len, int node, int enabled)
> > +acpi_build_srat_memory(AcpiSratMemoryAffinity *numamem, uint64_t base,
> > +                       uint64_t len, int node, MemoryAffinityFlags flags)
> >  {
> >      numamem->type = ACPI_SRAT_MEMORY;
> >      numamem->length = sizeof(*numamem);
> >      memset(numamem->proximity, 0, 4);
> >      numamem->proximity[0] = node;
> > -    numamem->flags = cpu_to_le32(!!enabled);
> > +    numamem->flags = cpu_to_le32(flags);
> >      numamem->base_addr = cpu_to_le64(base);
> >      numamem->range_length = cpu_to_le64(len);
> >  }
> > @@ -1094,7 +1101,7 @@ build_srat(GArray *table_data, GArray *linker,
> >      numa_start = table_data->len;
> >  
> >      numamem = acpi_data_push(table_data, sizeof *numamem);
> > -    acpi_build_srat_memory(numamem, 0, 640*1024, 0, 1);
> > +    acpi_build_srat_memory(numamem, 0, 640*1024, 0, ENABLED_MEM);
> >      next_base = 1024 * 1024;
> >      for (i = 1; i < guest_info->numa_nodes + 1; ++i) {
> >          mem_base = next_base;
> > @@ -1110,19 +1117,20 @@ build_srat(GArray *table_data, GArray *linker,
> >              mem_len -= next_base - guest_info->ram_size;
> >              if (mem_len > 0) {
> >                  numamem = acpi_data_push(table_data, sizeof *numamem);
> > -                acpi_build_srat_memory(numamem, mem_base, mem_len, i-1, 1);
> > +                acpi_build_srat_memory(numamem, mem_base, mem_len, i-1,
> > +                                       ENABLED_MEM);
> >              }
> >              mem_base = 1ULL << 32;
> >              mem_len = next_base - guest_info->ram_size;
> >              next_base += (1ULL << 32) - guest_info->ram_size;
> >          }
> >          numamem = acpi_data_push(table_data, sizeof *numamem);
> > -        acpi_build_srat_memory(numamem, mem_base, mem_len, i - 1, 1);
> > +        acpi_build_srat_memory(numamem, mem_base, mem_len, i - 1, ENABLED_MEM);
> >      }
> >      slots = (table_data->len - numa_start) / sizeof *numamem;
> >      for (; slots < guest_info->numa_nodes + 2; slots++) {
> >          numamem = acpi_data_push(table_data, sizeof *numamem);
> > -        acpi_build_srat_memory(numamem, 0, 0, 0, 0);
> > +        acpi_build_srat_memory(numamem, 0, 0, 0, NOFLAGS_MEM);
> >      }
> >  
> >      build_header(linker, table_data,
> > -- 
> > 1.7.1