[vNUMA v2][PATCH 2/8] public interface

[Dulloor <dulloor@gmail.com>]

[-- Attachment #1: Type: text/plain, Size: 171 bytes --]

Interface definition. Structure that will be shared with hvmloader (with HVMs)
and directly with the VMs (with PV).

-dulloor

Signed-off-by : Dulloor <dulloor@gmail.com>

[-- Attachment #2: xen-02-numa-public-interface.patch --]
[-- Type: text/x-patch, Size: 5310 bytes --]

vNUMA : public interface

diff --git a/xen/include/public/arch-x86/dom_numa.h b/xen/include/public/arch-x86/dom_numa.h
new file mode 100644
--- /dev/null
+++ b/xen/include/public/arch-x86/dom_numa.h
@@ -0,0 +1,91 @@
+/******************************************************************************
+ * dom_numa.h
+ *
+ * Guest NUMA common structures.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ *
+ * Author : Dulloor Rao
+ */
+#ifndef __XEN_PUBLIC_DOM_NUMA_X86_H__
+#define __XEN_PUBLIC_DOM_NUMA_X86_H__
+
+#define XEN_MAX_VCPUS 128
+
+/* vnodes are 1GB-aligned */
+#define XEN_MIN_VNODE_SHIFT (30)
+#define XEN_INVALID_NODE (0xFF)
+
+struct xen_vnode_info {
+    uint8_t mnode_id; 	/* physical node vnode is allocated from */
+    uint32_t start; 	/* start of the vnode range (in pages) */
+    uint32_t end; 		/* end of the vnode range (in pages) */
+};
+
+/* version : Interface version */
+#define XEN_DOM_NUMA_INTERFACE_VERSION  0x01
+
+/* type : On NUMA platforms, the VM memory could be distributed across 
+ * nodes in different ways.
+ */
+#define XEN_DOM_NUMA_CONFINE    0x01 /* Non-NUMA VM confined to a node */
+#define XEN_DOM_NUMA_SPLIT      0x02 /* NUMA VM split across nodes */
+#define XEN_DOM_NUMA_STRIPE     0x03 /* Non-NUMA VM striped across nodes */
+#define XEN_DOM_NUMA_DONTCARE   0x04 /* Ad-hoc allocation */
+
+/* xen_domain_numa_info : 
+ * For PV VMs, this is the NUMA enlightenment structure.
+ * For HVMs, this structure is shared with the domain builder (hvmloader).
+ * Size of data[] depends on nr_vnodes and nr_vcpus.
+ */
+
+/* Macros to access data structures in dynamic data[] field.
+ * nr_vcpus and nr_vnodes must be initialized in the xen_domain_numa_info
+ * structure before calling these macros. */
+#define NUMA_INFO_SIZE(pinfo)                                           \
+            (sizeof(*pinfo)                                             \
+                + pinfo->nr_vnodes*sizeof(struct xen_vnode_info)        \
+                + pinfo->nr_vcpus*sizeof(uint8_t)                       \
+                + pinfo->nr_vnodes*pinfo->nr_vnodes*sizeof(uint8_t))
+
+#define NUMA_INFO_VNODE_INFO(pinfo)                                     \
+            (struct xen_vnode_info *)((uint8_t *)pinfo + sizeof(*pinfo))
+		
+#define NUMA_INFO_VCPU_TO_VNODE(pinfo)                                  \
+            (uint8_t *)((uint8_t *)NUMA_INFO_VNODE_INFO(pinfo)          \
+                + pinfo->nr_vnodes*sizeof(struct xen_vnode_info))
+
+#define NUMA_INFO_VNODE_DISTANCE(pinfo)                                 \
+            (uint8_t *)((uint8_t *)NUMA_INFO_VCPU_TO_VNODE(pinfo)       \
+                + pinfo->nr_vcpus*sizeof(uint8_t))
+
+struct xen_domain_numa_info {
+    uint8_t version;    /* Interface version */
+    uint8_t type;       /* VM memory allocation scheme (see above) */
+
+    uint8_t nr_vcpus;
+    uint8_t nr_vnodes;
+    /* data[] has the following entries :
+     * //Only (nr_vnodes) entries are filled, each sizeof(struct xen_vnode_info)
+     * struct xen_vnode_info vnode_info[nr_vnodes]; 
+     * //Only (nr_vcpus) entries are filled, each sizeof(uint8_t)
+     * uint8_t vcpu_to_vnode[nr_vcpus];
+     * //Only (nr_vnodes*nr_vnodes) entries are filled, each sizeof(uint8_t)
+     * uint8_t vnode_distance[nr_vnodes*nr_vnodes];
+     */
+	uint8_t data[0];
+};
+
+#endif
diff --git a/xen/include/public/dom_numa.h b/xen/include/public/dom_numa.h
new file mode 100644
--- /dev/null
+++ b/xen/include/public/dom_numa.h
@@ -0,0 +1,33 @@
+/******************************************************************************
+ * dom_numa.h
+ *
+ * Guest NUMA common structures.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ *
+ * Author : Dulloor Rao
+ */
+
+#ifndef __XEN_PUBLIC_DOM_NUMA_H
+#define __XEN_PUBLIC_DOM_NUMA_H
+
+#if defined(__i386__) || defined(__x86_64__)
+#include "./arch-x86/dom_numa.h"
+#else
+#error "unsupported architecture"
+#endif
+
+
+#endif

[-- Attachment #3: Type: text/plain, Size: 138 bytes --]

_______________________________________________
Xen-devel mailing list
Xen-devel@lists.xensource.com
http://lists.xensource.com/xen-devel