xen: move XEN_SYSCTL_physinfo, XEN_SYSCTL_numainfo and XEN_SYSCTL_topologyinfo to common code

Move XEN_SYSCTL_physinfo, XEN_SYSCTL_numainfo and
XEN_SYSCTL_topologyinfo from x86/sysctl.c to common/sysctl.c.

The implementation of XEN_SYSCTL_physinfo is mostly generic but needs to
fill in few arch specific details: introduce arch_do_physinfo to do that.

The implementation of XEN_SYSCTL_physinfo relies on two global
variables: total_pages and cpu_khz. Make them available on ARM.

Implement node_spanned_pages and __node_distance on ARM, assuming 1 numa
node for now.

Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
Acked-by: Keir Fraser <keir@xen.org>
Acked-by: Ian Campbell <ian.campbell@citrix.com>
Committed-by: Ian Campbell <ian.campbell@citrix.com>

1 files changed, 9 insertions, 114 deletions

diff --git a/xen/arch/x86/sysctl.c b/xen/arch/x86/sysctl.c
index d0be4bee6a..b4d3e32775 100644
--- a/xen/arch/x86/sysctl.c
+++ b/xen/arch/x86/sysctl.c
@@ -57,6 +57,15 @@ long cpu_down_helper(void *data)
     return ret;
 }
 
+void arch_do_physinfo(xen_sysctl_physinfo_t *pi)
+{
+    memcpy(pi->hw_cap, boot_cpu_data.x86_capability, NCAPINTS*4);
+    if ( hvm_enabled )
+        pi->capabilities |= XEN_SYSCTL_PHYSCAP_hvm;
+    if ( iommu_enabled )
+        pi->capabilities |= XEN_SYSCTL_PHYSCAP_hvm_directio;
+}
+
 long arch_do_sysctl(
     struct xen_sysctl *sysctl, XEN_GUEST_HANDLE_PARAM(xen_sysctl_t) u_sysctl)
 {
@@ -65,120 +74,6 @@ long arch_do_sysctl(
     switch ( sysctl->cmd )
     {
 
-    case XEN_SYSCTL_physinfo:
-    {
-        xen_sysctl_physinfo_t *pi = &sysctl->u.physinfo;
-
-        memset(pi, 0, sizeof(*pi));
-        pi->threads_per_core =
-            cpumask_weight(per_cpu(cpu_sibling_mask, 0));
-        pi->cores_per_socket =
-            cpumask_weight(per_cpu(cpu_core_mask, 0)) / pi->threads_per_core;
-        pi->nr_cpus = num_online_cpus();
-        pi->nr_nodes = num_online_nodes();
-        pi->max_node_id = MAX_NUMNODES-1;
-        pi->max_cpu_id = nr_cpu_ids - 1;
-        pi->total_pages = total_pages;
-        pi->free_pages = avail_domheap_pages();
-        pi->scrub_pages = 0;
-        pi->cpu_khz = cpu_khz;
-        memcpy(pi->hw_cap, boot_cpu_data.x86_capability, NCAPINTS*4);
-        if ( hvm_enabled )
-            pi->capabilities |= XEN_SYSCTL_PHYSCAP_hvm;
-        if ( iommu_enabled )
-            pi->capabilities |= XEN_SYSCTL_PHYSCAP_hvm_directio;
-
-        if ( __copy_field_to_guest(u_sysctl, sysctl, u.physinfo) )
-            ret = -EFAULT;
-    }
-    break;
-        
-    case XEN_SYSCTL_topologyinfo:
-    {
-        uint32_t i, max_cpu_index, last_online_cpu;
-        xen_sysctl_topologyinfo_t *ti = &sysctl->u.topologyinfo;
-
-        last_online_cpu = cpumask_last(&cpu_online_map);
-        max_cpu_index = min_t(uint32_t, ti->max_cpu_index, last_online_cpu);
-        ti->max_cpu_index = last_online_cpu;
-
-        for ( i = 0; i <= max_cpu_index; i++ )
-        {
-            if ( !guest_handle_is_null(ti->cpu_to_core) )
-            {
-                uint32_t core = cpu_online(i) ? cpu_to_core(i) : ~0u;
-                if ( copy_to_guest_offset(ti->cpu_to_core, i, &core, 1) )
-                    break;
-            }
-            if ( !guest_handle_is_null(ti->cpu_to_socket) )
-            {
-                uint32_t socket = cpu_online(i) ? cpu_to_socket(i) : ~0u;
-                if ( copy_to_guest_offset(ti->cpu_to_socket, i, &socket, 1) )
-                    break;
-            }
-            if ( !guest_handle_is_null(ti->cpu_to_node) )
-            {
-                uint32_t node = cpu_online(i) ? cpu_to_node(i) : ~0u;
-                if ( copy_to_guest_offset(ti->cpu_to_node, i, &node, 1) )
-                    break;
-            }
-        }
-
-        ret = ((i <= max_cpu_index) ||
-               __copy_field_to_guest(u_sysctl, sysctl, u.topologyinfo))
-            ? -EFAULT : 0;
-    }
-    break;
-
-    case XEN_SYSCTL_numainfo:
-    {
-        uint32_t i, j, max_node_index, last_online_node;
-        xen_sysctl_numainfo_t *ni = &sysctl->u.numainfo;
-
-        last_online_node = last_node(node_online_map);
-        max_node_index = min_t(uint32_t, ni->max_node_index, last_online_node);
-        ni->max_node_index = last_online_node;
-
-        for ( i = 0; i <= max_node_index; i++ )
-        {
-            if ( !guest_handle_is_null(ni->node_to_memsize) )
-            {
-                uint64_t memsize = node_online(i) ? 
-                                   node_spanned_pages(i) << PAGE_SHIFT : 0ul;
-                if ( copy_to_guest_offset(ni->node_to_memsize, i, &memsize, 1) )
-                    break;
-            }
-            if ( !guest_handle_is_null(ni->node_to_memfree) )
-            {
-                uint64_t memfree = node_online(i) ? 
-                                   avail_node_heap_pages(i) << PAGE_SHIFT : 0ul;
-                if ( copy_to_guest_offset(ni->node_to_memfree, i, &memfree, 1) )
-                    break;
-            }
-
-            if ( !guest_handle_is_null(ni->node_to_node_distance) )
-            {
-                for ( j = 0; j <= max_node_index; j++)
-                {
-                    uint32_t distance = ~0u;
-                    if ( node_online(i) && node_online(j) )
-                        distance = __node_distance(i, j);
-                    if ( copy_to_guest_offset(
-                        ni->node_to_node_distance, 
-                        i*(max_node_index+1) + j, &distance, 1) )
-                        break;
-                }
-                if ( j <= max_node_index )
-                    break;
-            }
-        }
-
-        ret = ((i <= max_node_index) ||
-               __copy_field_to_guest(u_sysctl, sysctl, u.numainfo))
-            ? -EFAULT : 0;
-    }
-    break;
-    
     case XEN_SYSCTL_cpu_hotplug:
     {
         unsigned int cpu = sysctl->u.cpu_hotplug.cpu;