Linux-ACPI Archive on lore.kernel.org
 help / color / Atom feed
From: Jonathan Cameron <jonathan.cameron@huawei.com>
To: "Rafael J. Wysocki" <rafael@kernel.org>
Cc: Dan Williams <dan.j.williams@intel.com>,
	Keith Busch <keith.busch@intel.com>,
	Linux Memory Management List <linux-mm@kvack.org>,
	ACPI Devel Maling List <linux-acpi@vger.kernel.org>,
	"Linux Kernel Mailing List" <linux-kernel@vger.kernel.org>,
	Linux ARM <linux-arm-kernel@lists.infradead.org>,
	Jerome Glisse <jglisse@redhat.com>,
	"Rafael J . Wysocki" <rjw@rjwysocki.net>,
	Linuxarm <linuxarm@huawei.com>,
	Andrew Morton <akpm@linux-foundation.org>
Subject: Re: [PATCH 1/4] ACPI: Support Generic Initiator only domains
Date: Thu, 5 Sep 2019 10:16:14 +0100
Message-ID: <20190905101614.00002323@huawei.com> (raw)
In-Reply-To: <CAJZ5v0ie8s-Ye7PD=xj0nXL228WDqhjJPCs+eV3n6_SAeaQowg@mail.gmail.com>

On Mon, 2 Sep 2019 23:26:16 +0200
"Rafael J. Wysocki" <rafael@kernel.org> wrote:

> On Wed, Aug 21, 2019 at 4:53 PM Jonathan Cameron
> <Jonathan.Cameron@huawei.com> wrote:
> >
> > Generic Initiators are a new ACPI concept that allows for the
> > description of proximity domains that contain a device which
> > performs memory access (such as a network card) but neither
> > host CPU nor Memory.
> >
> > This patch has the parsing code and provides the infrastructure
> > for an architecture to associate these new domains with their
> > nearest memory processing node.
> >
> > Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>  
> 
> Dan, Keith, any comments?
> 
> AFAICS this clashes with the series from Dan that rearranges the ACPI
> NUMA related code.

Seems that one is going forwards now which is great. I'll rebase this on
top of Dan's series and send a v5 sometime soon.

Thanks,

Jonathan

> 
> > ---
> >  drivers/acpi/numa.c            | 62 +++++++++++++++++++++++++++++++++-
> >  drivers/base/node.c            |  3 ++
> >  include/asm-generic/topology.h |  3 ++
> >  include/linux/nodemask.h       |  1 +
> >  include/linux/topology.h       |  7 ++++
> >  5 files changed, 75 insertions(+), 1 deletion(-)
> >
> > diff --git a/drivers/acpi/numa.c b/drivers/acpi/numa.c
> > index eadbf90e65d1..fe34315a9234 100644
> > --- a/drivers/acpi/numa.c
> > +++ b/drivers/acpi/numa.c
> > @@ -170,6 +170,38 @@ acpi_table_print_srat_entry(struct acpi_subtable_header *header)
> >                 }
> >                 break;
> >
> > +       case ACPI_SRAT_TYPE_GENERIC_AFFINITY:
> > +       {
> > +               struct acpi_srat_generic_affinity *p =
> > +                       (struct acpi_srat_generic_affinity *)header;
> > +               char name[9] = {};
> > +
> > +               if (p->device_handle_type == 0) {
> > +                       /*
> > +                        * For pci devices this may be the only place they
> > +                        * are assigned a proximity domain
> > +                        */
> > +                       pr_debug("SRAT Generic Initiator(Seg:%u BDF:%u) in proximity domain %d %s\n",
> > +                                *(u16 *)(&p->device_handle[0]),
> > +                                *(u16 *)(&p->device_handle[2]),
> > +                                p->proximity_domain,
> > +                                (p->flags & ACPI_SRAT_GENERIC_AFFINITY_ENABLED) ?
> > +                               "enabled" : "disabled");
> > +               } else {
> > +                       /*
> > +                        * In this case we can rely on the device having a
> > +                        * proximity domain reference
> > +                        */
> > +                       memcpy(name, p->device_handle, 8);
> > +                       pr_info("SRAT Generic Initiator(HID=%.8s UID=%.4s) in proximity domain %d %s\n",
> > +                               (char *)(&p->device_handle[0]),
> > +                               (char *)(&p->device_handle[8]),
> > +                               p->proximity_domain,
> > +                               (p->flags & ACPI_SRAT_GENERIC_AFFINITY_ENABLED) ?
> > +                               "enabled" : "disabled");
> > +               }
> > +       }
> > +       break;
> >         default:
> >                 pr_warn("Found unsupported SRAT entry (type = 0x%x)\n",
> >                         header->type);
> > @@ -378,6 +410,32 @@ acpi_parse_gicc_affinity(union acpi_subtable_headers *header,
> >         return 0;
> >  }
> >
> > +static int __init
> > +acpi_parse_gi_affinity(union acpi_subtable_headers *header,
> > +                      const unsigned long end)
> > +{
> > +       struct acpi_srat_generic_affinity *gi_affinity;
> > +       int node;
> > +
> > +       gi_affinity = (struct acpi_srat_generic_affinity *)header;
> > +       if (!gi_affinity)
> > +               return -EINVAL;
> > +       acpi_table_print_srat_entry(&header->common);
> > +
> > +       if (!(gi_affinity->flags & ACPI_SRAT_GENERIC_AFFINITY_ENABLED))
> > +               return -EINVAL;
> > +
> > +       node = acpi_map_pxm_to_node(gi_affinity->proximity_domain);
> > +       if (node == NUMA_NO_NODE || node >= MAX_NUMNODES) {
> > +               pr_err("SRAT: Too many proximity domains.\n");
> > +               return -EINVAL;
> > +       }
> > +       node_set(node, numa_nodes_parsed);
> > +       node_set_state(node, N_GENERIC_INITIATOR);
> > +
> > +       return 0;
> > +}
> > +
> >  static int __initdata parsed_numa_memblks;
> >
> >  static int __init
> > @@ -433,7 +491,7 @@ int __init acpi_numa_init(void)
> >
> >         /* SRAT: System Resource Affinity Table */
> >         if (!acpi_table_parse(ACPI_SIG_SRAT, acpi_parse_srat)) {
> > -               struct acpi_subtable_proc srat_proc[3];
> > +               struct acpi_subtable_proc srat_proc[4];
> >
> >                 memset(srat_proc, 0, sizeof(srat_proc));
> >                 srat_proc[0].id = ACPI_SRAT_TYPE_CPU_AFFINITY;
> > @@ -442,6 +500,8 @@ int __init acpi_numa_init(void)
> >                 srat_proc[1].handler = acpi_parse_x2apic_affinity;
> >                 srat_proc[2].id = ACPI_SRAT_TYPE_GICC_AFFINITY;
> >                 srat_proc[2].handler = acpi_parse_gicc_affinity;
> > +               srat_proc[3].id = ACPI_SRAT_TYPE_GENERIC_AFFINITY;
> > +               srat_proc[3].handler = acpi_parse_gi_affinity;
> >
> >                 acpi_table_parse_entries_array(ACPI_SIG_SRAT,
> >                                         sizeof(struct acpi_table_srat),
> > diff --git a/drivers/base/node.c b/drivers/base/node.c
> > index 75b7e6f6535b..6f60689af5f8 100644
> > --- a/drivers/base/node.c
> > +++ b/drivers/base/node.c
> > @@ -980,6 +980,8 @@ static struct node_attr node_state_attr[] = {
> >  #endif
> >         [N_MEMORY] = _NODE_ATTR(has_memory, N_MEMORY),
> >         [N_CPU] = _NODE_ATTR(has_cpu, N_CPU),
> > +       [N_GENERIC_INITIATOR] = _NODE_ATTR(has_generic_initiator,
> > +                                          N_GENERIC_INITIATOR),
> >  };
> >
> >  static struct attribute *node_state_attrs[] = {
> > @@ -991,6 +993,7 @@ static struct attribute *node_state_attrs[] = {
> >  #endif
> >         &node_state_attr[N_MEMORY].attr.attr,
> >         &node_state_attr[N_CPU].attr.attr,
> > +       &node_state_attr[N_GENERIC_INITIATOR].attr.attr,
> >         NULL
> >  };
> >
> > diff --git a/include/asm-generic/topology.h b/include/asm-generic/topology.h
> > index 238873739550..54d0b4176a45 100644
> > --- a/include/asm-generic/topology.h
> > +++ b/include/asm-generic/topology.h
> > @@ -71,6 +71,9 @@
> >  #ifndef set_cpu_numa_mem
> >  #define set_cpu_numa_mem(cpu, node)
> >  #endif
> > +#ifndef set_gi_numa_mem
> > +#define set_gi_numa_mem(gi, node)
> > +#endif
> >
> >  #endif /* !CONFIG_NUMA || !CONFIG_HAVE_MEMORYLESS_NODES */
> >
> > diff --git a/include/linux/nodemask.h b/include/linux/nodemask.h
> > index 27e7fa36f707..1aebf766fb52 100644
> > --- a/include/linux/nodemask.h
> > +++ b/include/linux/nodemask.h
> > @@ -399,6 +399,7 @@ enum node_states {
> >  #endif
> >         N_MEMORY,               /* The node has memory(regular, high, movable) */
> >         N_CPU,          /* The node has one or more cpus */
> > +       N_GENERIC_INITIATOR,    /* The node is a GI only node */
> >         NR_NODE_STATES
> >  };
> >
> > diff --git a/include/linux/topology.h b/include/linux/topology.h
> > index 47a3e3c08036..2f97754e0508 100644
> > --- a/include/linux/topology.h
> > +++ b/include/linux/topology.h
> > @@ -125,6 +125,13 @@ static inline void set_numa_mem(int node)
> >  }
> >  #endif
> >
> > +#ifndef set_gi_numa_mem
> > +static inline void set_gi_numa_mem(int gi, int node)
> > +{
> > +       _node_numa_mem_[gi] = node;
> > +}
> > +#endif
> > +
> >  #ifndef node_to_mem_node
> >  static inline int node_to_mem_node(int node)
> >  {
> > --
> > 2.20.1
> >  
> 



  reply index

Thread overview: 7+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-08-21 14:52 [PATCH 0/4 V4] ACPI: Support generic initiator proximity domains Jonathan Cameron
2019-08-21 14:52 ` [PATCH 1/4] ACPI: Support Generic Initiator only domains Jonathan Cameron
2019-09-02 21:26   ` Rafael J. Wysocki
2019-09-05  9:16     ` Jonathan Cameron [this message]
2019-08-21 14:52 ` [PATCH 2/4] arm64: " Jonathan Cameron
2019-08-21 14:52 ` [PATCH 3/4] x86: Support Generic Initiator only proximity domains Jonathan Cameron
2019-08-21 14:52 ` [PATCH 4/4] ACPI: Let ACPI know we support Generic Initiator Affinity Structures Jonathan Cameron

Reply instructions:

You may reply publically 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=20190905101614.00002323@huawei.com \
    --to=jonathan.cameron@huawei.com \
    --cc=akpm@linux-foundation.org \
    --cc=dan.j.williams@intel.com \
    --cc=jglisse@redhat.com \
    --cc=keith.busch@intel.com \
    --cc=linux-acpi@vger.kernel.org \
    --cc=linux-arm-kernel@lists.infradead.org \
    --cc=linux-kernel@vger.kernel.org \
    --cc=linux-mm@kvack.org \
    --cc=linuxarm@huawei.com \
    --cc=rafael@kernel.org \
    --cc=rjw@rjwysocki.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

Linux-ACPI Archive on lore.kernel.org

Archives are clonable:
	git clone --mirror https://lore.kernel.org/linux-acpi/0 linux-acpi/git/0.git

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

Example config snippet for mirrors

Newsgroup available over NNTP:
	nntp://nntp.lore.kernel.org/org.kernel.vger.linux-acpi


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