hvmloader: retrieve vNUMA information from hypervisor

Hvmloader issues XENMEM_get_vnumainfo hypercall and stores the
information retrieved in scratch space for later use.

Signed-off-by: Wei Liu <wei.liu2@citrix.com>
Reviewed-by: Andrew Cooper <andrew.cooper3@citrix.com>
Acked-by: Jan Beulich <jbeulich@suse.com>

tools/firmware/hvmloader/Makefile

@@ -29,7 +29,7 @@ LOADADDR = 0x100000
 CFLAGS += $(CFLAGS_xeninclude)
 
 OBJS  = hvmloader.o mp_tables.o util.o smbios.o 
-OBJS += smp.o cacheattr.o xenbus.o
+OBJS += smp.o cacheattr.o xenbus.o vnuma.o
 OBJS += e820.o pci.o pir.o ctype.o
 OBJS += hvm_param.o
 ifeq ($(debug),y)

tools/firmware/hvmloader/hvmloader.c

@@ -26,6 +26,7 @@
 #include "pci_regs.h"
 #include "apic_regs.h"
 #include "acpi/acpi2_0.h"
+#include "vnuma.h"
 #include <xen/version.h>
 #include <xen/hvm/params.h>
 
@@ -310,6 +311,8 @@ int main(void)
 
     if ( acpi_enabled )
     {
+        init_vnuma_info();
+
         if ( bios->acpi_build_tables )
         {
             printf("Loading ACPI ...\n");

tools/firmware/hvmloader/vnuma.c

@@ -0,0 +1,80 @@
+/*
+ * 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"
+#include <xen/errno.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 != -XEN_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:
+ */

tools/firmware/hvmloader/vnuma.h

@@ -0,0 +1,52 @@
+/******************************************************************************
+ * vnuma.h
+ *
+ * Copyright (c) 2014, Wei Liu
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License version 2
+ * as published by the Free Software Foundation; or, when distributed
+ * separately from the Linux kernel or incorporated into other
+ * software packages, subject to the following license:
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this source file (the "Software"), to deal in the Software without
+ * restriction, including without limitation the rights to use, copy, modify,
+ * merge, publish, distribute, sublicense, and/or sell copies of the Software,
+ * and to permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+ * IN THE SOFTWARE.
+ */
+
+#ifndef __HVMLOADER_VNUMA_H__
+#define __HVMLOADER_VNUMA_H__
+
+#include <xen/memory.h>
+
+extern unsigned int nr_vnodes, nr_vmemranges;
+extern unsigned int *vcpu_to_vnode, *vdistance;
+extern xen_vmemrange_t *vmemrange;
+
+void init_vnuma_info(void);
+
+#endif /* __HVMLOADER_VNUMA_H__ */
+
+/*
+ * Local variables:
+ * mode: C
+ * c-file-style: "BSD"
+ * c-basic-offset: 4
+ * tab-width: 4
+ * indent-tabs-mode: nil
+ * End:
+ */