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[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Xen-changelog] [xen-unstable] Support getting topology info in libxl
# HG changeset patch
# User Juergen Gross <juergen.gross@xxxxxxxxxxxxxx>
# Date 1291890090 -3600
# Node ID f713cff1a5870b44927db041745b54d5424014c2
# Parent 8079cba70803523dccaaeee22d35e5adc9932597
Support getting topology info in libxl
Added new function libxl_get_topologyinfo() to obtain this information from
hypervisor.
Signed-off-by: juergen.gross@xxxxxxxxxxxxxx
Signed-off-by: Ian Jackson <ian.jackson.citrix.com>
---
tools/libxl/libxl.c | 53 ++++++++++++++++++++++++++++++++++++++
tools/libxl/libxl.h | 8 +++++
tools/libxl/libxl.idl | 7 +++++
tools/libxl/libxl_utils.c | 24 +++++++++++++++++
tools/libxl/libxl_utils.h | 2 +
tools/python/xen/lowlevel/xl/xl.c | 24 +++++++++++++++++
6 files changed, 118 insertions(+)
diff -r 8079cba70803 -r f713cff1a587 tools/libxl/libxl.c
--- a/tools/libxl/libxl.c Fri Dec 03 09:36:47 2010 +0000
+++ b/tools/libxl/libxl.c Thu Dec 09 11:21:30 2010 +0100
@@ -3223,6 +3223,59 @@ int libxl_get_physinfo(libxl_ctx *ctx, l
return 0;
}
+int libxl_get_topologyinfo(libxl_ctx *ctx, libxl_topologyinfo *info)
+{
+ xc_topologyinfo_t tinfo;
+ DECLARE_HYPERCALL_BUFFER(xc_cpu_to_core_t, coremap);
+ DECLARE_HYPERCALL_BUFFER(xc_cpu_to_socket_t, socketmap);
+ DECLARE_HYPERCALL_BUFFER(xc_cpu_to_node_t, nodemap);
+ int i;
+ int rc = 0;
+
+ rc += libxl_cpuarray_alloc(ctx, &info->coremap);
+ rc += libxl_cpuarray_alloc(ctx, &info->socketmap);
+ rc += libxl_cpuarray_alloc(ctx, &info->nodemap);
+ if (rc)
+ goto fail;
+
+ coremap = xc_hypercall_buffer_alloc(ctx->xch, coremap, sizeof(*coremap) *
info->coremap.entries);
+ socketmap = xc_hypercall_buffer_alloc(ctx->xch, socketmap,
sizeof(*socketmap) * info->socketmap.entries);
+ nodemap = xc_hypercall_buffer_alloc(ctx->xch, nodemap, sizeof(*nodemap) *
info->nodemap.entries);
+ if ((coremap == NULL) || (socketmap == NULL) || (nodemap == NULL))
+ goto fail;
+
+ set_xen_guest_handle(tinfo.cpu_to_core, coremap);
+ set_xen_guest_handle(tinfo.cpu_to_socket, socketmap);
+ set_xen_guest_handle(tinfo.cpu_to_node, nodemap);
+ tinfo.max_cpu_index = info->coremap.entries - 1;
+ if (xc_topologyinfo(ctx->xch, &tinfo) != 0)
+ goto fail;
+
+ for (i = 0; i <= tinfo.max_cpu_index; i++) {
+ if (i < info->coremap.entries)
+ info->coremap.array[i] = (coremap[i] == INVALID_TOPOLOGY_ID) ?
+ LIBXL_CPUARRAY_INVALID_ENTRY : coremap[i];
+ if (i < info->socketmap.entries)
+ info->socketmap.array[i] = (socketmap[i] == INVALID_TOPOLOGY_ID) ?
+ LIBXL_CPUARRAY_INVALID_ENTRY : socketmap[i];
+ if (i < info->nodemap.entries)
+ info->nodemap.array[i] = (nodemap[i] == INVALID_TOPOLOGY_ID) ?
+ LIBXL_CPUARRAY_INVALID_ENTRY : nodemap[i];
+ }
+
+ xc_hypercall_buffer_free(ctx->xch, coremap);
+ xc_hypercall_buffer_free(ctx->xch, socketmap);
+ xc_hypercall_buffer_free(ctx->xch, nodemap);
+ return 0;
+
+fail:
+ xc_hypercall_buffer_free(ctx->xch, coremap);
+ xc_hypercall_buffer_free(ctx->xch, socketmap);
+ xc_hypercall_buffer_free(ctx->xch, nodemap);
+ libxl_topologyinfo_destroy(info);
+ return ERROR_FAIL;
+}
+
const libxl_version_info* libxl_get_version_info(libxl_ctx *ctx)
{
union {
diff -r 8079cba70803 -r f713cff1a587 tools/libxl/libxl.h
--- a/tools/libxl/libxl.h Fri Dec 03 09:36:47 2010 +0000
+++ b/tools/libxl/libxl.h Thu Dec 09 11:21:30 2010 +0100
@@ -148,6 +148,13 @@ typedef struct {
uint8_t *map;
} libxl_cpumap;
void libxl_cpumap_destroy(libxl_cpumap *map);
+
+typedef struct {
+ uint32_t entries;
+ uint32_t *array;
+} libxl_cpuarray;
+#define LIBXL_CPUARRAY_INVALID_ENTRY ~0
+void libxl_cpuarray_destroy(libxl_cpuarray *array);
typedef enum {
XENFV = 1,
@@ -468,6 +475,7 @@ int libxl_button_press(libxl_ctx *ctx, u
int libxl_button_press(libxl_ctx *ctx, uint32_t domid, libxl_button button);
int libxl_get_physinfo(libxl_ctx *ctx, libxl_physinfo *physinfo);
+int libxl_get_topologyinfo(libxl_ctx *ctx, libxl_topologyinfo *info);
libxl_vcpuinfo *libxl_list_vcpu(libxl_ctx *ctx, uint32_t domid,
int *nb_vcpu, int *nrcpus);
int libxl_set_vcpuaffinity(libxl_ctx *ctx, uint32_t domid, uint32_t vcpuid,
diff -r 8079cba70803 -r f713cff1a587 tools/libxl/libxl.idl
--- a/tools/libxl/libxl.idl Fri Dec 03 09:36:47 2010 +0000
+++ b/tools/libxl/libxl.idl Thu Dec 09 11:21:30 2010 +0100
@@ -7,6 +7,7 @@ libxl_uuid = Builtin("uuid")
libxl_uuid = Builtin("uuid")
libxl_mac = Builtin("mac")
libxl_cpumap = Builtin("cpumap", destructor_fn="libxl_cpumap_destroy",
passby=PASS_BY_REFERENCE)
+libxl_cpuarray = Builtin("cpuarray", destructor_fn="libxl_cpuarray_destroy",
passby=PASS_BY_REFERENCE)
libxl_qemu_machine_type = Number("qemu_machine_type", namespace="libxl_")
libxl_console_consback = Number("console_consback", namespace="libxl_")
libxl_console_constype = Number("console_constype", namespace="libxl_")
@@ -302,6 +303,12 @@ libxl_physinfo = Struct("physinfo", [
("phys_cap", uint32),
], destructor_fn=None)
+libxl_topologyinfo = Struct("topologyinfo", [
+ ("coremap", libxl_cpuarray, False, "cpu to core map"),
+ ("socketmap", libxl_cpuarray, False, "cpu to socket map"),
+ ("nodemap", libxl_cpuarray, False, "cpu to node map"),
+ ])
+
libxl_sched_credit = Struct("sched_credit", [
("weight", integer),
("cap", integer),
diff -r 8079cba70803 -r f713cff1a587 tools/libxl/libxl_utils.c
--- a/tools/libxl/libxl_utils.c Fri Dec 03 09:36:47 2010 +0000
+++ b/tools/libxl/libxl_utils.c Thu Dec 09 11:21:30 2010 +0100
@@ -751,6 +751,30 @@ void libxl_cpumap_reset(libxl_cpumap *cp
cpumap->map[cpu / 8] &= ~(1 << (cpu & 7));
}
+int libxl_cpuarray_alloc(libxl_ctx *ctx, libxl_cpuarray *cpuarray)
+{
+ int max_cpus;
+ int i;
+
+ max_cpus = libxl_get_max_cpus(ctx);
+ if (max_cpus == 0)
+ return ERROR_FAIL;
+
+ cpuarray->array = calloc(max_cpus, sizeof(*cpuarray->array));
+ if (!cpuarray->array)
+ return ERROR_NOMEM;
+ cpuarray->entries = max_cpus;
+ for (i = 0; i < max_cpus; i++)
+ cpuarray->array[i] = LIBXL_CPUARRAY_INVALID_ENTRY;
+
+ return 0;
+}
+
+void libxl_cpuarray_destroy(libxl_cpuarray *array)
+{
+ free(array->array);
+}
+
int libxl_get_max_cpus(libxl_ctx *ctx)
{
return xc_get_max_cpus(ctx->xch);
diff -r 8079cba70803 -r f713cff1a587 tools/libxl/libxl_utils.h
--- a/tools/libxl/libxl_utils.h Fri Dec 03 09:36:47 2010 +0000
+++ b/tools/libxl/libxl_utils.h Thu Dec 09 11:21:30 2010 +0100
@@ -82,5 +82,7 @@ void libxl_cpumap_reset(libxl_cpumap *cp
void libxl_cpumap_reset(libxl_cpumap *cpumap, int cpu);
#define libxl_for_each_cpu(var, map) for (var = 0; var < (map).size * 8; var++)
+int libxl_cpuarray_alloc(libxl_ctx *ctx, libxl_cpuarray *cpuarray);
+
#endif
diff -r 8079cba70803 -r f713cff1a587 tools/python/xen/lowlevel/xl/xl.c
--- a/tools/python/xen/lowlevel/xl/xl.c Fri Dec 03 09:36:47 2010 +0000
+++ b/tools/python/xen/lowlevel/xl/xl.c Thu Dec 09 11:21:30 2010 +0100
@@ -224,6 +224,11 @@ int attrib__libxl_cpumap_set(PyObject *v
return 0;
}
+int attrib__libxl_cpuarray_set(PyObject *v, libxl_cpuarray *pptr)
+{
+ return -1;
+}
+
int attrib__libxl_domain_build_state_ptr_set(PyObject *v,
libxl_domain_build_state **pptr)
{
return -1;
@@ -284,6 +289,25 @@ PyObject *attrib__libxl_cpumap_get(libxl
}
}
return cpulist;
+}
+
+PyObject *attrib__libxl_cpuarray_get(libxl_cpuarray *pptr)
+{
+ PyObject *list = NULL;
+ int i;
+
+ list = PyList_New(0);
+ for (i = 0; i < pptr->entries; i++) {
+ if (pptr->array[i] == LIBXL_CPUARRAY_INVALID_ENTRY) {
+ PyList_Append(list, Py_None);
+ } else {
+ PyObject* pyint = PyInt_FromLong(pptr->array[i]);
+
+ PyList_Append(list, pyint);
+ Py_DECREF(pyint);
+ }
+ }
+ return list;
}
PyObject *attrib__libxl_domain_build_state_ptr_get(libxl_domain_build_state
**pptr)
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