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/*
* vnuma.c: obtain vNUMA information from hypervisor
*
* Copyright (c) 2014 Wei Liu, Citrix Systems (R&D) Ltd.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include "util.h"
#include "hypercall.h"
#include "vnuma.h"
unsigned int nr_vnodes, nr_vmemranges;
unsigned int *vcpu_to_vnode, *vdistance;
xen_vmemrange_t *vmemrange;
void init_vnuma_info(void)
{
int rc;
struct xen_vnuma_topology_info vnuma_topo = { .domid = DOMID_SELF };
rc = hypercall_memory_op(XENMEM_get_vnumainfo, &vnuma_topo);
if ( rc != -ENOBUFS )
return;
ASSERT(vnuma_topo.nr_vcpus == hvm_info->nr_vcpus);
vcpu_to_vnode =
scratch_alloc(sizeof(*vcpu_to_vnode) * hvm_info->nr_vcpus, 0);
vdistance = scratch_alloc(sizeof(uint32_t) * vnuma_topo.nr_vnodes *
vnuma_topo.nr_vnodes, 0);
vmemrange = scratch_alloc(sizeof(xen_vmemrange_t) *
vnuma_topo.nr_vmemranges, 0);
set_xen_guest_handle(vnuma_topo.vdistance.h, vdistance);
set_xen_guest_handle(vnuma_topo.vcpu_to_vnode.h, vcpu_to_vnode);
set_xen_guest_handle(vnuma_topo.vmemrange.h, vmemrange);
rc = hypercall_memory_op(XENMEM_get_vnumainfo, &vnuma_topo);
if ( rc < 0 )
{
printf("Failed to retrieve vNUMA information, rc = %d\n", rc);
return;
}
nr_vnodes = vnuma_topo.nr_vnodes;
nr_vmemranges = vnuma_topo.nr_vmemranges;
}
/*
* Local variables:
* mode: C
* c-file-style: "BSD"
* c-basic-offset: 4
* tab-width: 4
* indent-tabs-mode: nil
* End:
*/
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