[Xen-devel] Re: [Xen-staging] [xen-unstable] Extended the physinfo sysctl to export NUMA cpu_to_node topology info.

[Alex Williamson <alex.williamson@xxxxxx>]

On Fri, 2007-07-06 at 16:14 +0100, Xen staging patchbot-unstable wrote:
> # HG changeset patch
> # User kfraser@xxxxxxxxxxxxxxxxxxxxx
> # Date 1183734727 -3600
> # Node ID 89d2192942befb0daf56e730be61d3a3c06926dd
> # Parent  538c3d8aa4b14833174423ec506284279d5a33ab
> Extended the physinfo sysctl to export NUMA cpu_to_node topology info.
> Print this in 'xm info'.
...
>  xen/include/public/sysctl.h                         |   20 +++++

   How is this working for anyone without sync'ing the linux sysctl.h?
I can't even get xend to start.  Thanks,

        Alex


Sync Xen sysctl.h with Linux

Signed-off-by: Alex Williamson <alex.williamson@xxxxxx>
---

diff -r 353e0152bb50 include/xen/interface/sysctl.h
--- a/include/xen/interface/sysctl.h    Mon Jul 09 11:00:44 2007 -0600
+++ b/include/xen/interface/sysctl.h    Mon Jul 09 21:30:17 2007 -0600
@@ -34,7 +34,7 @@
 #include "xen.h"
 #include "domctl.h"
 
-#define XEN_SYSCTL_INTERFACE_VERSION 0x00000003
+#define XEN_SYSCTL_INTERFACE_VERSION 0x00000004
 
 /*
  * Read console content from Xen buffer ring.
@@ -76,6 +76,7 @@ DEFINE_XEN_GUEST_HANDLE(xen_sysctl_tbuf_
  */
 #define XEN_SYSCTL_physinfo          3
 struct xen_sysctl_physinfo {
+    /* IN variables. */
     uint32_t threads_per_core;
     uint32_t cores_per_socket;
     uint32_t sockets_per_node;
@@ -85,6 +86,23 @@ struct xen_sysctl_physinfo {
     uint64_aligned_t free_pages;
     uint64_aligned_t scrub_pages;
     uint32_t hw_cap[8];
+
+    /* IN/OUT variables. */
+    /*
+     * IN: maximum addressable entry in the caller-provided cpu_to_node array.
+     * OUT: largest cpu identifier in the system.
+     * If OUT is greater than IN then the cpu_to_node array is truncated!
+     */
+    uint32_t max_cpu_id;
+    /*
+     * If not NULL, this array is filled with node identifier for each cpu.
+     * If a cpu has no node information (e.g., cpu not present) then the
+     * sentinel value ~0u is written.
+     * The size of this array is specified by the caller in @max_cpu_id.
+     * If the actual @max_cpu_id is smaller than the array then the trailing
+     * elements of the array will not be written by the sysctl.
+     */
+    XEN_GUEST_HANDLE_64(uint32_t) cpu_to_node;
 };
 typedef struct xen_sysctl_physinfo xen_sysctl_physinfo_t;
 DEFINE_XEN_GUEST_HANDLE(xen_sysctl_physinfo_t);
@@ -140,9 +158,7 @@ typedef struct xen_sysctl_getdomaininfol
 typedef struct xen_sysctl_getdomaininfolist xen_sysctl_getdomaininfolist_t;
 DEFINE_XEN_GUEST_HANDLE(xen_sysctl_getdomaininfolist_t);
 
-/*
- * Inject debug keys into Xen.
- */
+/* Inject debug keys into Xen. */
 #define XEN_SYSCTL_debug_keys        7
 struct xen_sysctl_debug_keys {
     /* IN variables. */
@@ -151,6 +167,23 @@ struct xen_sysctl_debug_keys {
 };
 typedef struct xen_sysctl_debug_keys xen_sysctl_debug_keys_t;
 DEFINE_XEN_GUEST_HANDLE(xen_sysctl_debug_keys_t);
+
+/* Get physical CPU information. */
+#define XEN_SYSCTL_getcpuinfo        8
+struct xen_sysctl_cpuinfo {
+    uint64_t idletime;
+};
+typedef struct xen_sysctl_cpuinfo xen_sysctl_cpuinfo_t;
+DEFINE_XEN_GUEST_HANDLE(xen_sysctl_cpuinfo_t); 
+struct xen_sysctl_getcpuinfo {
+    /* IN variables. */
+    uint32_t max_cpus;
+    XEN_GUEST_HANDLE_64(xen_sysctl_cpuinfo_t) info;
+    /* OUT variables. */
+    uint32_t nr_cpus;
+}; 
+typedef struct xen_sysctl_getcpuinfo xen_sysctl_getcpuinfo_t;
+DEFINE_XEN_GUEST_HANDLE(xen_sysctl_getcpuinfo_t); 
 
 struct xen_sysctl {
     uint32_t cmd;
@@ -163,6 +196,7 @@ struct xen_sysctl {
         struct xen_sysctl_perfc_op          perfc_op;
         struct xen_sysctl_getdomaininfolist getdomaininfolist;
         struct xen_sysctl_debug_keys        debug_keys;
+        struct xen_sysctl_getcpuinfo        getcpuinfo;
         uint8_t                             pad[128];
     } u;
 };



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