Provide Px statistic data to user through libxc

Sampling and collecting dynamic Px statistic data, including
Px state value, Px count, Px residency time, Px transition
matrix, etc. Provide Px statistic data to user through libxc.

Signed-off-by: Liu Jinsong <jinsong.liu@intel.com>

1 files changed, 101 insertions, 0 deletions

diff --git a/tools/libxc/xc_pm.c b/tools/libxc/xc_pm.c
new file mode 100644
index 0000000000..0378cbd521
--- /dev/null
+++ b/tools/libxc/xc_pm.c
@@ -0,0 +1,101 @@
+/******************************************************************************
+ * xc_pm.c - Libxc API for Xen Power Management (Px/Cx/Tx, etc.) statistic
+ *
+ * Copyright (c) 2008, Liu Jinsong <jinsong.liu@intel.com>
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (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.
+ *
+ */
+
+#include "xc_private.h"
+
+int xc_pm_get_max_px(int xc_handle, int cpuid, int *max_px)
+{
+    DECLARE_SYSCTL;
+    int ret;
+
+    sysctl.cmd = XEN_SYSCTL_get_pmstat;
+    sysctl.u.get_pmstat.type = PMSTAT_get_max_px;
+    sysctl.u.get_pmstat.cpuid = cpuid;
+    ret = xc_sysctl(xc_handle, &sysctl);
+    if ( ret )
+        return ret;
+
+    *max_px = sysctl.u.get_pmstat.u.getpx.total;
+    return ret;
+}
+
+int xc_pm_get_pxstat(int xc_handle, int cpuid, struct xc_px_stat *pxpt)
+{
+    DECLARE_SYSCTL;
+    int max_px, ret;
+
+    if ( !pxpt || !(pxpt->trans_pt) || !(pxpt->pt) )
+        return -EINVAL;
+
+    if ( (ret = xc_pm_get_max_px(xc_handle, cpuid, &max_px)) != 0)
+        return ret;
+
+    if ( (ret = lock_pages(pxpt->trans_pt, 
+        max_px * max_px * sizeof(uint64_t))) != 0 )
+        return ret;
+
+    if ( (ret = lock_pages(pxpt->pt, 
+        max_px * sizeof(struct xc_px_val))) != 0 )
+    {
+        unlock_pages(pxpt->trans_pt, max_px * max_px * sizeof(uint64_t));
+        return ret;
+    }
+
+    sysctl.cmd = XEN_SYSCTL_get_pmstat;
+    sysctl.u.get_pmstat.type = PMSTAT_get_pxstat;
+    sysctl.u.get_pmstat.cpuid = cpuid;
+    set_xen_guest_handle(sysctl.u.get_pmstat.u.getpx.trans_pt, pxpt->trans_pt);
+    set_xen_guest_handle(sysctl.u.get_pmstat.u.getpx.pt, 
+                        (pm_px_val_t *)pxpt->pt);
+
+    ret = xc_sysctl(xc_handle, &sysctl);
+    if ( ret )
+    {
+        unlock_pages(pxpt->trans_pt, max_px * max_px * sizeof(uint64_t));
+        unlock_pages(pxpt->pt, max_px * sizeof(struct xc_px_val));
+        return ret;
+    }
+
+    pxpt->total = sysctl.u.get_pmstat.u.getpx.total;
+    pxpt->usable = sysctl.u.get_pmstat.u.getpx.usable;
+    pxpt->last = sysctl.u.get_pmstat.u.getpx.last;
+    pxpt->cur = sysctl.u.get_pmstat.u.getpx.cur;
+
+    unlock_pages(pxpt->trans_pt, max_px * max_px * sizeof(uint64_t));
+    unlock_pages(pxpt->pt, max_px * sizeof(struct xc_px_val));
+
+    return ret;
+}
+
+int xc_pm_reset_pxstat(int xc_handle, int cpuid)
+{
+    DECLARE_SYSCTL;
+
+    sysctl.cmd = XEN_SYSCTL_get_pmstat;
+    sysctl.u.get_pmstat.type = PMSTAT_reset_pxstat;
+    sysctl.u.get_pmstat.cpuid = cpuid;
+
+    return xc_sysctl(xc_handle, &sysctl);
+}