# HG changeset patch
# User Keir Fraser <keir.fraser@xxxxxxxxxx>
# Date 1238494766 -3600
# Node ID fa8dc6e43ec8d2870ce12d627c22359e7e47e04e
# Parent 0f53202cb1320659134bbf3d2b06882b06f3ad65
cpuidle: export max_cstate access via libxc
Signed-off-by: Wei Gang <gang.wei@xxxxxxxxx>
---
tools/libxc/xc_pm.c | 33 +++++++++++++++++++++++++++++++++
tools/libxc/xenctrl.h | 3 +++
xen/drivers/acpi/pmstat.c | 13 +++++++++++++
xen/include/public/sysctl.h | 6 ++++++
4 files changed, 55 insertions(+)
diff -r 0f53202cb132 -r fa8dc6e43ec8 tools/libxc/xc_pm.c
--- a/tools/libxc/xc_pm.c Tue Mar 31 11:17:51 2009 +0100
+++ b/tools/libxc/xc_pm.c Tue Mar 31 11:19:26 2009 +0100
@@ -362,3 +362,36 @@ int xc_set_sched_opt_smt(int xc_handle,
return rc;
}
+int xc_get_cpuidle_max_cstate(int xc_handle, uint32_t *value)
+{
+ int rc;
+ DECLARE_SYSCTL;
+
+ if ( xc_handle < 0 || !value )
+ return -EINVAL;
+
+ sysctl.cmd = XEN_SYSCTL_pm_op;
+ sysctl.u.pm_op.cmd = XEN_SYSCTL_pm_op_get_max_cstate;
+ sysctl.u.pm_op.cpuid = 0;
+ sysctl.u.pm_op.get_max_cstate = 0;
+ rc = do_sysctl(xc_handle, &sysctl);
+ *value = sysctl.u.pm_op.get_max_cstate;
+
+ return rc;
+}
+
+int xc_set_cpuidle_max_cstate(int xc_handle, uint32_t value)
+{
+ DECLARE_SYSCTL;
+
+ if ( xc_handle < 0 )
+ return -EINVAL;
+
+ sysctl.cmd = XEN_SYSCTL_pm_op;
+ sysctl.u.pm_op.cmd = XEN_SYSCTL_pm_op_set_max_cstate;
+ sysctl.u.pm_op.cpuid = 0;
+ sysctl.u.pm_op.set_max_cstate = value;
+
+ return do_sysctl(xc_handle, &sysctl);
+}
+
diff -r 0f53202cb132 -r fa8dc6e43ec8 tools/libxc/xenctrl.h
--- a/tools/libxc/xenctrl.h Tue Mar 31 11:17:51 2009 +0100
+++ b/tools/libxc/xenctrl.h Tue Mar 31 11:19:26 2009 +0100
@@ -1262,4 +1262,7 @@ int xc_get_cputopo(int xc_handle, struct
int xc_set_sched_opt_smt(int xc_handle, uint32_t value);
+int xc_get_cpuidle_max_cstate(int xc_handle, uint32_t *value);
+int xc_set_cpuidle_max_cstate(int xc_handle, uint32_t value);
+
#endif /* XENCTRL_H */
diff -r 0f53202cb132 -r fa8dc6e43ec8 xen/drivers/acpi/pmstat.c
--- a/xen/drivers/acpi/pmstat.c Tue Mar 31 11:17:51 2009 +0100
+++ b/xen/drivers/acpi/pmstat.c Tue Mar 31 11:19:26 2009 +0100
@@ -37,6 +37,7 @@
#include <asm/processor.h>
#include <xen/percpu.h>
#include <xen/domain.h>
+#include <xen/acpi.h>
#include <public/sysctl.h>
#include <acpi/cpufreq/cpufreq.h>
@@ -527,6 +528,18 @@ int do_pm_op(struct xen_sysctl_pm_op *op
break;
}
+ case XEN_SYSCTL_pm_op_get_max_cstate:
+ {
+ op->get_max_cstate = max_cstate;
+ break;
+ }
+
+ case XEN_SYSCTL_pm_op_set_max_cstate:
+ {
+ max_cstate = op->set_max_cstate;
+ break;
+ }
+
default:
printk("not defined sub-hypercall @ do_pm_op\n");
ret = -ENOSYS;
diff -r 0f53202cb132 -r fa8dc6e43ec8 xen/include/public/sysctl.h
--- a/xen/include/public/sysctl.h Tue Mar 31 11:17:51 2009 +0100
+++ b/xen/include/public/sysctl.h Tue Mar 31 11:19:26 2009 +0100
@@ -382,6 +382,10 @@ struct xen_sysctl_pm_op {
/* set/reset scheduler power saving option */
#define XEN_SYSCTL_pm_op_set_sched_opt_smt 0x21
+ /* cpuidle max_cstate access command */
+ #define XEN_SYSCTL_pm_op_get_max_cstate 0x22
+ #define XEN_SYSCTL_pm_op_set_max_cstate 0x23
+
uint32_t cmd;
uint32_t cpuid;
union {
@@ -391,6 +395,8 @@ struct xen_sysctl_pm_op {
uint64_t get_avgfreq;
struct xen_get_cputopo get_topo;
uint32_t set_sched_opt_smt;
+ uint32_t get_max_cstate;
+ uint32_t set_max_cstate;
};
};
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