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Re: [Qemu-devel] [RFC PATCH v0 10/15] ppc: Factor out CPU initialization
From: |
Bharata B Rao |
Subject: |
Re: [Qemu-devel] [RFC PATCH v0 10/15] ppc: Factor out CPU initialization code to a new routine |
Date: |
Mon, 29 Sep 2014 08:30:15 +0530 |
User-agent: |
Mutt/1.5.21 (2010-09-15) |
On Fri, Sep 26, 2014 at 05:29:02PM +0200, Igor Mammedov wrote:
> On Thu, 4 Sep 2014 11:36:20 +0530
> Bharata B Rao <address@hidden> wrote:
>
> > Separate out CPU initialization code into a new routine ppc_new_cpu()
> > so that it can be used from CPU hotplug path too.
> >
> > Signed-off-by: Bharata B Rao <address@hidden>
> > ---
> > hw/ppc/spapr.c | 73
> > +++++++++++++++++++++++++++++++++-------------------------
> > 1 file changed, 42 insertions(+), 31 deletions(-)
> >
> > diff --git a/hw/ppc/spapr.c b/hw/ppc/spapr.c
> > index b2ca527..41207ae 100644
> > --- a/hw/ppc/spapr.c
> > +++ b/hw/ppc/spapr.c
> > @@ -1603,6 +1603,45 @@ static SaveVMHandlers savevm_htab_handlers = {
> > .load_state = htab_load,
> > };
> >
> looking at following code from POV of using CPU with device_add cmd.
>
> > +static const char *current_cpu_model;
> do PPC CPUs use full 'model-name,feature1,-feature2' format or only
> model-name from cpu_model string?
I think it is just the model-name.
>
> > +static PowerPCCPU *ppc_new_cpu(const char *cpu_model)
> > +{
> > + PowerPCCPU *cpu;
> > + CPUPPCState *env;
> > +
> > + cpu = cpu_ppc_init(cpu_model);
> > + if (cpu == NULL) {
> > + fprintf(stderr, "Unable to find PowerPC CPU definition\n");
> > + exit(1);
> > + }
>
> -- cut --
> > + env = &cpu->env;
> > +
> > + /* Set time-base frequency to 512 MHz */
> > + cpu_ppc_tb_init(env, TIMEBASE_FREQ);
> > +
> > + /* PAPR always has exception vectors in RAM not ROM. To ensure this,
> > + * MSR[IP] should never be set.
> > + */
> > + env->msr_mask &= ~(1 << 6);
> > +
> > + /* Tell KVM that we're in PAPR mode */
> > + if (kvm_enabled()) {
> > + kvmppc_set_papr(cpu);
> > + }
> > +
> > + if (cpu->max_compat) {
> > + if (ppc_set_compat(cpu, cpu->max_compat) < 0) {
> > + exit(1);
> > + }
> > + }
> -- cut --
> selected block looks like setting CPU internals, which could be done
> inside of CPU's realizefn.
>
> > +
> > + xics_cpu_setup(spapr->icp, cpu);
>
>
> > + qemu_register_reset(spapr_cpu_reset, cpu);
> also could be put inside of CPU's realizefn, like it's done in
> for x86 CPU.
Right, I just converted my CPU hotplug patchset for PowerPC to use the
hotplug handler APIs and now working on to see if I can switch over to
device_add and support device_del for CPU hotplug on PowerPC.
Regards,
Bharata.
- [Qemu-devel] [RFC PATCH v0 09/15] ppc: Consider max_cpus during xics initialization, (continued)
- [Qemu-devel] [RFC PATCH v0 09/15] ppc: Consider max_cpus during xics initialization, Bharata B Rao, 2014/09/04
- [Qemu-devel] [RFC PATCH v0 07/15] ppc: Initialize DRC table before initializing CPUs, Bharata B Rao, 2014/09/04
- [Qemu-devel] [RFC PATCH v0 06/15] ppc: stop after getting first unused DR slot in DRC table, Bharata B Rao, 2014/09/04
- [Qemu-devel] [RFC PATCH v0 04/15] ppc: Make creation of DRC entries in FDT endian safe, Bharata B Rao, 2014/09/04
- [Qemu-devel] [RFC PATCH v0 05/15] ppc: Accommodate CPU DRC entries in DRC table, Bharata B Rao, 2014/09/04
- [Qemu-devel] [RFC PATCH v0 14/15] ppc: Add CPU hotplug support for sPAPR guests, Bharata B Rao, 2014/09/04
- [Qemu-devel] [RFC PATCH v0 12/15] ppc: Support ibm, lrdr-capacity device tree property, Bharata B Rao, 2014/09/04
- [Qemu-devel] [RFC PATCH v0 10/15] ppc: Factor out CPU initialization code to a new routine, Bharata B Rao, 2014/09/04
- [Qemu-devel] [RFC PATCH v0 13/15] ppc: Make ibm, configure-connector endian-safe, Bharata B Rao, 2014/09/04
- [Qemu-devel] [RFC PATCH v0 11/15] ppc: Move RTAS indicator defines to a header file, Bharata B Rao, 2014/09/04
- [Qemu-devel] [RFC PATCH v0 02/15] ppc: Rename SPAPR_DRC_TABLE_SIZE to SPAPR_DRC_PHB_TABLE_SIZE, Bharata B Rao, 2014/09/04
- [Qemu-devel] [RFC PATCH v0 08/15] ppc: Add CPU dynamic reconfiguration (DR) support, Bharata B Rao, 2014/09/04
- [Qemu-devel] [RFC PATCH v0 15/15] ppc: Allow hotplugging of CPU cores only, Bharata B Rao, 2014/09/04