From: Elena Ufimtseva <ufimtseva@gmail.com>
Date: Fri, 5 Sep 2014 09:02:22 +0000 (+0200)
Subject: libxc: Introduce xc_domain_setvnuma to set vNUMA
X-Git-Tag: archive/raspbian/4.8.0-1+rpi1~1^2~4468
X-Git-Url: https://dgit.raspbian.org/%22http:/www.example.com/cgi/%22https:/%22bookmarks://%22/%22http:/www.example.com/cgi/%22https:/%22bookmarks:/%22?a=commitdiff_plain;h=e6b6884ec577a59281e4953f27a2376363012151;p=xen.git

libxc: Introduce xc_domain_setvnuma to set vNUMA

With the introduction of the XEN_DOMCTL_setvnumainfo
in patch titled: "xen: vnuma topology and subop hypercalls"
we put in the plumbing here to use from the toolstack. The user
is allowed to call this multiple times if they wish so.
It will error out if the nr_vnodes or nr_vcpus is zero.

Signed-off-by: Elena Ufimtseva <ufimtseva@gmail.com>
Reviewed-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Acked-by: Ian Campbell <ian.campbell@citrix.com>
---

diff --git a/tools/libxc/xc_domain.c b/tools/libxc/xc_domain.c
index 1eba39379a..1a6f90abbc 100644
--- a/tools/libxc/xc_domain.c
+++ b/tools/libxc/xc_domain.c
@@ -2134,6 +2134,74 @@ int xc_domain_set_max_evtchn(xc_interface *xch, uint32_t domid,
     return do_domctl(xch, &domctl);
 }
 
+/* Plumbing Xen with vNUMA topology */
+int xc_domain_setvnuma(xc_interface *xch,
+                       uint32_t domid,
+                       uint32_t nr_vnodes,
+                       uint32_t nr_vmemranges,
+                       uint32_t nr_vcpus,
+                       vmemrange_t *vmemrange,
+                       unsigned int *vdistance,
+                       unsigned int *vcpu_to_vnode,
+                       unsigned int *vnode_to_pnode)
+{
+    int rc;
+    DECLARE_DOMCTL;
+    DECLARE_HYPERCALL_BOUNCE(vmemrange, sizeof(*vmemrange) * nr_vmemranges,
+                             XC_HYPERCALL_BUFFER_BOUNCE_BOTH);
+    DECLARE_HYPERCALL_BOUNCE(vdistance, sizeof(*vdistance) *
+                             nr_vnodes * nr_vnodes,
+                             XC_HYPERCALL_BUFFER_BOUNCE_BOTH);
+    DECLARE_HYPERCALL_BOUNCE(vcpu_to_vnode, sizeof(*vcpu_to_vnode) * nr_vcpus,
+                             XC_HYPERCALL_BUFFER_BOUNCE_BOTH);
+    DECLARE_HYPERCALL_BOUNCE(vnode_to_pnode, sizeof(*vnode_to_pnode) *
+                             nr_vnodes,
+                             XC_HYPERCALL_BUFFER_BOUNCE_BOTH);
+    errno = EINVAL;
+
+    if ( nr_vnodes == 0 || nr_vmemranges == 0 ||
+         nr_vmemranges < nr_vnodes || nr_vcpus == 0 )
+        return -1;
+
+    if ( !vdistance || !vcpu_to_vnode || !vmemrange || !vnode_to_pnode )
+    {
+        PERROR("%s: Cant set vnuma without initializing topology", __func__);
+        return -1;
+    }
+
+    if ( xc_hypercall_bounce_pre(xch, vmemrange)      ||
+         xc_hypercall_bounce_pre(xch, vdistance)      ||
+         xc_hypercall_bounce_pre(xch, vcpu_to_vnode)  ||
+         xc_hypercall_bounce_pre(xch, vnode_to_pnode) )
+    {
+        rc = -1;
+        goto vnumaset_fail;
+
+    }
+
+    set_xen_guest_handle(domctl.u.vnuma.vmemrange, vmemrange);
+    set_xen_guest_handle(domctl.u.vnuma.vdistance, vdistance);
+    set_xen_guest_handle(domctl.u.vnuma.vcpu_to_vnode, vcpu_to_vnode);
+    set_xen_guest_handle(domctl.u.vnuma.vnode_to_pnode, vnode_to_pnode);
+
+    domctl.cmd = XEN_DOMCTL_setvnumainfo;
+    domctl.domain = (domid_t)domid;
+    domctl.u.vnuma.nr_vnodes = nr_vnodes;
+    domctl.u.vnuma.nr_vmemranges = nr_vmemranges;
+    domctl.u.vnuma.nr_vcpus = nr_vcpus;
+    domctl.u.vnuma.pad = 0;
+
+    rc = do_domctl(xch, &domctl);
+
+ vnumaset_fail:
+    xc_hypercall_bounce_post(xch, vmemrange);
+    xc_hypercall_bounce_post(xch, vdistance);
+    xc_hypercall_bounce_post(xch, vcpu_to_vnode);
+    xc_hypercall_bounce_post(xch, vnode_to_pnode);
+
+    return rc;
+}
+
 /*
  * Local variables:
  * mode: C
diff --git a/tools/libxc/xenctrl.h b/tools/libxc/xenctrl.h
index 1c5d0db5ad..1c8aa42966 100644
--- a/tools/libxc/xenctrl.h
+++ b/tools/libxc/xenctrl.h
@@ -1245,6 +1245,16 @@ int xc_domain_set_memmap_limit(xc_interface *xch,
                                uint32_t domid,
                                unsigned long map_limitkb);
 
+int xc_domain_setvnuma(xc_interface *xch,
+                        uint32_t domid,
+                        uint32_t nr_vnodes,
+                        uint32_t nr_regions,
+                        uint32_t nr_vcpus,
+                        vmemrange_t *vmemrange,
+                        unsigned int *vdistance,
+                        unsigned int *vcpu_to_vnode,
+                        unsigned int *vnode_to_pnode);
+
 #if defined(__i386__) || defined(__x86_64__)
 /*
  * PC BIOS standard E820 types and structure.