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Re: [Qemu-devel] [RFC PATCH v2 21/23] spapr: Initialize hotplug memory a


From: Bharata B Rao
Subject: Re: [Qemu-devel] [RFC PATCH v2 21/23] spapr: Initialize hotplug memory address space
Date: Mon, 13 Apr 2015 08:29:33 +0530
User-agent: Mutt/1.5.23 (2014-03-12)

On Wed, Mar 25, 2015 at 04:58:18PM +1100, David Gibson wrote:
> On Mon, Mar 23, 2015 at 07:06:02PM +0530, Bharata B Rao wrote:
> > Initialize a hotplug memory region under which all the hotplugged
> > memory is accommodated. Also enable memory hotplug by setting
> > CONFIG_MEM_HOTPLUG.
> > 
> > Modelled on i386 memory hotplug.
> > 
> > Signed-off-by: Bharata B Rao <address@hidden>
> > ---
> >  default-configs/ppc64-softmmu.mak |  1 +
> >  hw/ppc/spapr.c                    | 50 
> > +++++++++++++++++++++++++++++++++++++++
> >  include/hw/ppc/spapr.h            | 12 ++++++++++
> >  3 files changed, 63 insertions(+)
> > 
> > diff --git a/default-configs/ppc64-softmmu.mak 
> > b/default-configs/ppc64-softmmu.mak
> > index 22ef132..16b3011 100644
> > --- a/default-configs/ppc64-softmmu.mak
> > +++ b/default-configs/ppc64-softmmu.mak
> > @@ -51,3 +51,4 @@ CONFIG_XICS_KVM=$(and $(CONFIG_PSERIES),$(CONFIG_KVM))
> >  # For PReP
> >  CONFIG_MC146818RTC=y
> >  CONFIG_ISA_TESTDEV=y
> > +CONFIG_MEM_HOTPLUG=y
> > diff --git a/hw/ppc/spapr.c b/hw/ppc/spapr.c
> > index 3e56d9e..e43bb49 100644
> > --- a/hw/ppc/spapr.c
> > +++ b/hw/ppc/spapr.c
> > @@ -125,8 +125,13 @@ struct sPAPRMachineState {
> >  
> >      /*< public >*/
> >      char *kvm_type;
> > +    ram_addr_t hotplug_memory_base;
> > +    MemoryRegion hotplug_memory;
> > +    bool enforce_aligned_dimm;
> >  };
> >  
> > +#define SPAPR_MACHINE_ENFORCE_ALIGNED_DIMM "enforce-aligned-dimm"
> 
> What's the rationale for including this option?

I couldn't see any use, but added it to be similar with x86. May be Igor
can tell us ?

Regards,
Bharata.




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