QEMU-Devel Archive on lore.kernel.org
 help / color / Atom feed
From: Babu Moger <babu.moger@amd.com>
To: Eduardo Habkost <ehabkost@redhat.com>
Cc: "mst@redhat.com" <mst@redhat.com>,
	"armbru@redhat.com" <armbru@redhat.com>,
	"qemu-devel@nongnu.org" <qemu-devel@nongnu.org>,
	"imammedo@redhat.com" <imammedo@redhat.com>,
	"pbonzini@redhat.com" <pbonzini@redhat.com>,
	"rth@twiddle.net" <rth@twiddle.net>
Subject: Re: [Qemu-devel] [RFC 2 PATCH 03/16] hw/i386: Introduce X86CPUTopoInfo to contain topology info
Date: Mon, 2 Dec 2019 14:23:05 -0600
Message-ID: <f680f815-f2ef-fd59-e2ec-f65393e8ea6d@amd.com> (raw)
In-Reply-To: <20191011022932.GA29387@habkost.net>



On 10/10/19 9:29 PM, Eduardo Habkost wrote:
> On Fri, Sep 06, 2019 at 07:11:57PM +0000, Moger, Babu wrote:
>> This is an effort to re-arrange few data structure for better
>> readability. Add X86CPUTopoInfo which will have all the topology
>> informations required to build the cpu topology. There is no
>> functional changes.
>>
>> Signed-off-by: Babu Moger <babu.moger@amd.com>
>> ---
>>  hw/i386/pc.c               |   40 +++++++++++++++++++++++++++-------------
>>  include/hw/i386/topology.h |   40 ++++++++++++++++++++++++++--------------
>>  2 files changed, 53 insertions(+), 27 deletions(-)
>>
>> diff --git a/hw/i386/pc.c b/hw/i386/pc.c
>> index ada445f8f3..95aab8e5e7 100644
>> --- a/hw/i386/pc.c
>> +++ b/hw/i386/pc.c
>> @@ -930,11 +930,15 @@ static uint32_t x86_cpu_apic_id_from_index(PCMachineState *pcms,
>>  {
>>      MachineState *ms = MACHINE(pcms);
>>      PCMachineClass *pcmc = PC_MACHINE_GET_CLASS(pcms);
>> +    X86CPUTopoInfo topo_info;
>>      uint32_t correct_id;
>>      static bool warned;
>>  
>> -    correct_id = x86_apicid_from_cpu_idx(pcms->smp_dies, ms->smp.cores,
>> -                                         ms->smp.threads, cpu_index);
>> +    topo_info.nr_dies = pcms->smp_dies;
>> +    topo_info.nr_cores = ms->smp.cores;
>> +    topo_info.nr_threads = ms->smp.threads;
>> +
>> +    correct_id = x86_apicid_from_cpu_idx(&topo_info, cpu_index);
> 
> If you are using the struct in function calls, please make sure
> all fields are filled correctly, so we won't introduce bugs
> accidentally if we start using the new fields inside the topology
> functions.
> 
> Alternatively, you can leave the struct without the numa_nodes
> and nr_sockets fields by now (because they are unused), and add
> the fields in another patch.

Yes. Separated the patches and added the new fields separately.

> 
> Except for this, the patch looks good.  However, I don't
> understand yet the use case for the `numa_nodes` field yet.  I
> will probably comment on the `numa_nodes` field once I see the
> patches that use the new field.
> 


  reply index

Thread overview: 43+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-09-06 19:11 [Qemu-devel] [RFC 2 PATCH 00/16] APIC ID fixes for AMD EPYC CPU models Moger, Babu
2019-09-06 19:11 ` [Qemu-devel] [RFC 2 PATCH 01/16] numa: Split the numa functionality Moger, Babu
2019-10-10  3:25   ` Eduardo Habkost
2019-12-02 20:18     ` Babu Moger
2019-09-06 19:11 ` [Qemu-devel] [RFC 2 PATCH 02/16] hw/i386: Rename X86CPUTopoInfo structure to X86CPUTopoIDs Moger, Babu
2019-10-10  3:26   ` Eduardo Habkost
2019-09-06 19:11 ` [Qemu-devel] [RFC 2 PATCH 03/16] hw/i386: Introduce X86CPUTopoInfo to contain topology info Moger, Babu
2019-10-11  2:29   ` Eduardo Habkost
2019-12-02 20:23     ` Babu Moger [this message]
2019-10-11  3:54   ` Eduardo Habkost
2019-12-02 20:25     ` Babu Moger
2019-09-06 19:12 ` [Qemu-devel] [RFC 2 PATCH 04/16] machine: Add SMP Sockets in CpuTopology Moger, Babu
2019-10-11  2:31   ` Eduardo Habkost
2019-09-06 19:12 ` [Qemu-devel] [RFC 2 PATCH 05/16] hw/i386: Simplify topology Offset/width Calculation Moger, Babu
2019-10-11  2:32   ` Eduardo Habkost
2019-12-02 20:29     ` Babu Moger
2019-09-06 19:12 ` [Qemu-devel] [RFC 2 PATCH 06/16] hw/core: Add core complex id in X86CPU topology Moger, Babu
2019-09-06 19:20   ` Eric Blake
2019-09-06 19:34     ` Moger, Babu
2019-09-22 12:48   ` Michael S. Tsirkin
2019-09-23 14:38     ` Moger, Babu
2019-09-06 19:12 ` [Qemu-devel] [RFC 2 PATCH 07/16] hw/386: Add new epyc mode topology decoding functions Moger, Babu
2019-10-11  3:29   ` Eduardo Habkost
2019-12-02 20:38     ` Babu Moger
2019-09-06 19:12 ` [Qemu-devel] [RFC 2 PATCH 08/16] i386: Cleanup and use the new epyc mode topology functions Moger, Babu
2019-10-11  3:51   ` Eduardo Habkost
2019-09-06 19:12 ` [Qemu-devel] [RFC 2 PATCH 09/16] hw/i386: Introduce initialize_topo_info function Moger, Babu
2019-10-11  3:54   ` Eduardo Habkost
2019-09-06 19:12 ` [Qemu-devel] [RFC 2 PATCH 10/16] hw/i386: Introduce apicid_from_cpu_idx in PCMachineState Moger, Babu
2019-09-06 19:12 ` [Qemu-devel] [RFC 2 PATCH 11/16] Introduce-topo_ids_from_apicid-handler Moger, Babu
2019-09-06 19:13 ` [Qemu-devel] [RFC 2 PATCH 12/16] hw/i386: Introduce apic_id_from_topo_ids handler in PCMachineState Moger, Babu
2019-09-06 19:13 ` [Qemu-devel] [RFC 2 PATCH 13/16] machine: Add new epyc property " Moger, Babu
2019-10-11  3:59   ` Eduardo Habkost
2019-10-11 16:23     ` Moger, Babu
2019-10-11 16:59     ` Moger, Babu
2019-10-11 19:03       ` Eduardo Habkost
2019-09-06 19:13 ` [Qemu-devel] [RFC 2 PATCH 14/16] hw/i386: Introduce epyc mode function handlers Moger, Babu
2019-09-06 19:13 ` [Qemu-devel] [RFC 2 PATCH 15/16] i386: Fix pkg_id offset for epyc mode Moger, Babu
2019-10-11  4:03   ` Eduardo Habkost
2019-09-06 19:13 ` [Qemu-devel] [RFC 2 PATCH 16/16] hw/core: Fix up the machine_set_cpu_numa_node for epyc Moger, Babu
2019-10-11  4:10   ` Eduardo Habkost
2019-12-02 20:44     ` Babu Moger
2019-09-20 22:44 ` [RFC 2 PATCH 00/16] APIC ID fixes for AMD EPYC CPU models Moger, Babu

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=f680f815-f2ef-fd59-e2ec-f65393e8ea6d@amd.com \
    --to=babu.moger@amd.com \
    --cc=armbru@redhat.com \
    --cc=ehabkost@redhat.com \
    --cc=imammedo@redhat.com \
    --cc=mst@redhat.com \
    --cc=pbonzini@redhat.com \
    --cc=qemu-devel@nongnu.org \
    --cc=rth@twiddle.net \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link

QEMU-Devel Archive on lore.kernel.org

Archives are clonable:
	git clone --mirror https://lore.kernel.org/qemu-devel/0 qemu-devel/git/0.git
	git clone --mirror https://lore.kernel.org/qemu-devel/1 qemu-devel/git/1.git
	git clone --mirror https://lore.kernel.org/qemu-devel/2 qemu-devel/git/2.git

	# If you have public-inbox 1.1+ installed, you may
	# initialize and index your mirror using the following commands:
	public-inbox-init -V2 qemu-devel qemu-devel/ https://lore.kernel.org/qemu-devel \
		qemu-devel@nongnu.org
	public-inbox-index qemu-devel

Example config snippet for mirrors

Newsgroup available over NNTP:
	nntp://nntp.lore.kernel.org/org.nongnu.qemu-devel


AGPL code for this site: git clone https://public-inbox.org/public-inbox.git