Re: [Qemu-devel] [PATCH v2 07/11] hw/arm/virt-acpi-build: Add PC-DIMM in SRAT

[Igor Mammedov]

On Tue, 12 Mar 2019 09:57:58 +0000
Shameerali Kolothum Thodi <address@hidden> wrote:

> > -----Original Message-----
> > From: Igor Mammedov [mailto:address@hidden
> > Sent: 11 March 2019 14:55
> > To: Shameerali Kolothum Thodi <address@hidden>
> > Cc: address@hidden; address@hidden;
> > address@hidden; address@hidden;
> > address@hidden; address@hidden;
> > address@hidden; Linuxarm <address@hidden>; xuwei (O)
> > <address@hidden>
> > Subject: Re: [PATCH v2 07/11] hw/arm/virt-acpi-build: Add PC-DIMM in SRAT
> > 
> > On Fri, 8 Mar 2019 11:42:14 +0000
> > Shameer Kolothum <address@hidden> wrote:
> >   
> > > Generate Memory Affinity Structures for PC-DIMM ranges.
> > >
> > > Signed-off-by: Shameer Kolothum <address@hidden>
> > > Signed-off-by: Eric Auger <address@hidden>
> > > Reviewed-by: Igor Mammedov <address@hidden>
> > > ---
> > >  hw/arm/virt-acpi-build.c | 9 +++++++++
> > >  1 file changed, 9 insertions(+)
> > >
> > > diff --git a/hw/arm/virt-acpi-build.c b/hw/arm/virt-acpi-build.c
> > > index 87d66da..6cb7263 100644
> > > --- a/hw/arm/virt-acpi-build.c
> > > +++ b/hw/arm/virt-acpi-build.c
> > > @@ -524,6 +524,7 @@ build_srat(GArray *table_data, BIOSLinker *linker,  
> > VirtMachineState *vms)  
> > >      int i, srat_start;
> > >      uint64_t mem_base;
> > >      MachineClass *mc = MACHINE_GET_CLASS(vms);
> > > +    MachineState *ms = MACHINE(vms);
> > >      const CPUArchIdList *cpu_list =  
> > mc->possible_cpu_arch_ids(MACHINE(vms));  
> > >
> > >      srat_start = table_data->len;
> > > @@ -549,6 +550,14 @@ build_srat(GArray *table_data, BIOSLinker *linker,  
> > VirtMachineState *vms)  
> > >          }
> > >      }
> > >
> > > +    if (ms->device_memory) {
> > > +        numamem = acpi_data_push(table_data, sizeof *numamem);
> > > +        build_srat_memory(numamem, ms->device_memory->base,
> > > +  
> > memory_region_size(&ms->device_memory->mr),  
> > > +                          nb_numa_nodes - 1,
> > > +                          MEM_AFFINITY_HOTPLUGGABLE |  
> > MEM_AFFINITY_ENABLED);  
> > > +    }
> > > +  
> > 
> > do we care about 'Windows' guests?
> > if yes then we should drop this patch,
> > see commit for reasoning dbb6da8ba7e  
> 
> If I understood that commit, that is reverting to use a single entry for whole
> hotplug area instead of splitting into multiple entries. ie, remove
> build_srat_hotpluggable_memory() and use build_srat_memory() instead,
> which is what this patch does.
> 
> May be I am missing something here. Please let me know.
Apologies it's my mistake :/, you are totally right.
This patch looks fine me.

> 
> Thanks,
> Shameer
> 
> > >      build_header(linker, table_data, (void *)(table_data->data +  
> > srat_start),  
> > >                   "SRAT", table_data->len - srat_start, 3, NULL, NULL);
> > >  }  
>