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[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Xen-changelog] [xen-unstable] Add user PM control interface
# HG changeset patch
# User Keir Fraser <keir.fraser@xxxxxxxxxx>
# Date 1228915661 0
# Node ID 605ef79ee46c5d57ee0797ac69521c263b62bce9
# Parent 9ba1541d6dc2d6c6e6c7cf0a57ef8a1f0ea9793d
Add user PM control interface
Signed-off-by: Liu, Jinsong <jinsong.liu@xxxxxxxxx>
---
tools/libxc/xc_pm.c | 140 +++++++++++++++
tools/libxc/xenctrl.h | 42 ++++
xen/arch/ia64/xen/cpufreq/cpufreq.c | 1
xen/arch/x86/acpi/cpufreq/cpufreq.c | 1
xen/common/sysctl.c | 16 +
xen/drivers/acpi/pmstat.c | 306 +++++++++++++++++++++++++++++++++
xen/drivers/cpufreq/cpufreq.c | 6
xen/drivers/cpufreq/cpufreq_ondemand.c | 40 ++++
xen/include/acpi/cpufreq/cpufreq.h | 16 +
xen/include/public/sysctl.h | 86 +++++++++
10 files changed, 647 insertions(+), 7 deletions(-)
diff -r 9ba1541d6dc2 -r 605ef79ee46c tools/libxc/xc_pm.c
--- a/tools/libxc/xc_pm.c Wed Dec 10 13:27:14 2008 +0000
+++ b/tools/libxc/xc_pm.c Wed Dec 10 13:27:41 2008 +0000
@@ -23,8 +23,15 @@
*
*/
+#include <errno.h>
+#include <curses.h>
+#include <linux/kernel.h>
+
#include "xc_private.h"
+/*
+ * Get PM statistic info
+ */
int xc_pm_get_max_px(int xc_handle, int cpuid, int *max_px)
{
DECLARE_SYSCTL;
@@ -168,3 +175,136 @@ int xc_pm_reset_cxstat(int xc_handle, in
return xc_sysctl(xc_handle, &sysctl);
}
+
+
+/*
+ * 1. Get PM parameter
+ * 2. Provide user PM control
+ */
+int xc_get_cpufreq_para(int xc_handle, int cpuid,
+ struct xc_get_cpufreq_para *user_para)
+{
+ DECLARE_SYSCTL;
+ int ret = 0;
+ struct xen_get_cpufreq_para *sys_para = &sysctl.u.pm_op.get_para;
+ bool has_num = user_para->cpu_num &&
+ user_para->freq_num &&
+ user_para->gov_num;
+
+ if ( (xc_handle < 0) || !user_para )
+ return -EINVAL;
+
+ if ( has_num )
+ {
+ if ( (!user_para->affected_cpus) ||
+ (!user_para->scaling_available_frequencies) ||
+ (!user_para->scaling_available_governors) )
+ return -EINVAL;
+
+ if ( (ret = lock_pages(user_para->affected_cpus,
+ user_para->cpu_num * sizeof(uint32_t))) )
+ goto unlock_1;
+ if ( (ret = lock_pages(user_para->scaling_available_frequencies,
+ user_para->freq_num * sizeof(uint32_t))) )
+ goto unlock_2;
+ if ( (ret = lock_pages(user_para->scaling_available_governors,
+ user_para->gov_num * CPUFREQ_NAME_LEN * sizeof(char))) )
+ goto unlock_3;
+
+ set_xen_guest_handle(sys_para->affected_cpus,
+ user_para->affected_cpus);
+ set_xen_guest_handle(sys_para->scaling_available_frequencies,
+ user_para->scaling_available_frequencies);
+ set_xen_guest_handle(sys_para->scaling_available_governors,
+ user_para->scaling_available_governors);
+ }
+
+ sysctl.cmd = XEN_SYSCTL_pm_op;
+ sysctl.u.pm_op.cmd = GET_CPUFREQ_PARA;
+ sysctl.u.pm_op.cpuid = cpuid;
+ sys_para->cpu_num = user_para->cpu_num;
+ sys_para->freq_num = user_para->freq_num;
+ sys_para->gov_num = user_para->gov_num;
+
+ ret = xc_sysctl(xc_handle, &sysctl);
+ if ( ret )
+ {
+ if ( errno == EAGAIN )
+ {
+ user_para->cpu_num = sys_para->cpu_num;
+ user_para->freq_num = sys_para->freq_num;
+ user_para->gov_num = sys_para->gov_num;
+ ret = -errno;
+ }
+
+ if ( has_num )
+ goto unlock_4;
+ goto unlock_1;
+ }
+ else
+ {
+ user_para->cpuinfo_cur_freq = sys_para->cpuinfo_cur_freq;
+ user_para->cpuinfo_max_freq = sys_para->cpuinfo_max_freq;
+ user_para->cpuinfo_min_freq = sys_para->cpuinfo_min_freq;
+ user_para->scaling_cur_freq = sys_para->scaling_cur_freq;
+ user_para->scaling_max_freq = sys_para->scaling_max_freq;
+ user_para->scaling_min_freq = sys_para->scaling_min_freq;
+
+ memcpy(user_para->scaling_driver,
+ sys_para->scaling_driver, CPUFREQ_NAME_LEN);
+ memcpy(user_para->scaling_governor,
+ sys_para->scaling_governor, CPUFREQ_NAME_LEN);
+
+ /* copy to user_para no matter what cpufreq governor */
+ BUILD_BUG_ON(sizeof(((struct xc_get_cpufreq_para *)0)->u) !=
+ sizeof(((struct xen_get_cpufreq_para *)0)->u));
+
+ memcpy(&user_para->u, &sys_para->u, sizeof(sys_para->u));
+ }
+
+unlock_4:
+ unlock_pages(user_para->scaling_available_governors,
+ user_para->gov_num * CPUFREQ_NAME_LEN * sizeof(char));
+unlock_3:
+ unlock_pages(user_para->scaling_available_frequencies,
+ user_para->freq_num * sizeof(uint32_t));
+unlock_2:
+ unlock_pages(user_para->affected_cpus,
+ user_para->cpu_num * sizeof(uint32_t));
+unlock_1:
+ return ret;
+}
+
+int xc_set_cpufreq_gov(int xc_handle, int cpuid, char *govname)
+{
+ DECLARE_SYSCTL;
+ char *scaling_governor = sysctl.u.pm_op.set_gov.scaling_governor;
+
+ if ( (xc_handle < 0) || (!govname) )
+ return -EINVAL;
+
+ sysctl.cmd = XEN_SYSCTL_pm_op;
+ sysctl.u.pm_op.cmd = SET_CPUFREQ_GOV;
+ sysctl.u.pm_op.cpuid = cpuid;
+ strncpy(scaling_governor, govname, CPUFREQ_NAME_LEN);
+ scaling_governor[CPUFREQ_NAME_LEN] = '\0';
+
+ return xc_sysctl(xc_handle, &sysctl);
+}
+
+int xc_set_cpufreq_para(int xc_handle, int cpuid,
+ int ctrl_type, int ctrl_value)
+{
+ DECLARE_SYSCTL;
+
+ if ( xc_handle < 0 )
+ return -EINVAL;
+
+ sysctl.cmd = XEN_SYSCTL_pm_op;
+ sysctl.u.pm_op.cmd = SET_CPUFREQ_PARA;
+ sysctl.u.pm_op.cpuid = cpuid;
+ sysctl.u.pm_op.set_para.ctrl_type = ctrl_type;
+ sysctl.u.pm_op.set_para.ctrl_value = ctrl_value;
+
+ return xc_sysctl(xc_handle, &sysctl);
+}
diff -r 9ba1541d6dc2 -r 605ef79ee46c tools/libxc/xenctrl.h
--- a/tools/libxc/xenctrl.h Wed Dec 10 13:27:14 2008 +0000
+++ b/tools/libxc/xenctrl.h Wed Dec 10 13:27:41 2008 +0000
@@ -1161,4 +1161,46 @@ int xc_pm_reset_cxstat(int xc_handle, in
int xc_cpu_online(int xc_handle, int cpu);
int xc_cpu_offline(int xc_handle, int cpu);
+
+/*
+ * cpufreq para name of this structure named
+ * same as sysfs file name of native linux
+ */
+typedef xen_userspace_t xc_userspace_t;
+typedef xen_ondemand_t xc_ondemand_t;
+
+struct xc_get_cpufreq_para {
+ /* IN/OUT variable */
+ uint32_t cpu_num;
+ uint32_t freq_num;
+ uint32_t gov_num;
+
+ /* for all governors */
+ /* OUT variable */
+ uint32_t *affected_cpus;
+ uint32_t *scaling_available_frequencies;
+ char *scaling_available_governors;
+ char scaling_driver[CPUFREQ_NAME_LEN];
+
+ uint32_t cpuinfo_cur_freq;
+ uint32_t cpuinfo_max_freq;
+ uint32_t cpuinfo_min_freq;
+ uint32_t scaling_cur_freq;
+
+ char scaling_governor[CPUFREQ_NAME_LEN];
+ uint32_t scaling_max_freq;
+ uint32_t scaling_min_freq;
+
+ /* for specific governor */
+ union {
+ xc_userspace_t userspace;
+ xc_ondemand_t ondemand;
+ } u;
+};
+
+int xc_get_cpufreq_para(int xc_handle, int cpuid,
+ struct xc_get_cpufreq_para *user_para);
+int xc_set_cpufreq_gov(int xc_handle, int cpuid, char *govname);
+int xc_set_cpufreq_para(int xc_handle, int cpuid,
+ int ctrl_type, int ctrl_value);
#endif /* XENCTRL_H */
diff -r 9ba1541d6dc2 -r 605ef79ee46c xen/arch/ia64/xen/cpufreq/cpufreq.c
--- a/xen/arch/ia64/xen/cpufreq/cpufreq.c Wed Dec 10 13:27:14 2008 +0000
+++ b/xen/arch/ia64/xen/cpufreq/cpufreq.c Wed Dec 10 13:27:41 2008 +0000
@@ -275,6 +275,7 @@ acpi_cpufreq_cpu_exit (struct cpufreq_po
}
static struct cpufreq_driver acpi_cpufreq_driver = {
+ .name = "acpi-cpufreq",
.verify = acpi_cpufreq_verify,
.target = acpi_cpufreq_target,
.get = acpi_cpufreq_get,
diff -r 9ba1541d6dc2 -r 605ef79ee46c xen/arch/x86/acpi/cpufreq/cpufreq.c
--- a/xen/arch/x86/acpi/cpufreq/cpufreq.c Wed Dec 10 13:27:14 2008 +0000
+++ b/xen/arch/x86/acpi/cpufreq/cpufreq.c Wed Dec 10 13:27:41 2008 +0000
@@ -549,6 +549,7 @@ static int acpi_cpufreq_cpu_exit(struct
}
static struct cpufreq_driver acpi_cpufreq_driver = {
+ .name = "acpi-cpufreq",
.verify = acpi_cpufreq_verify,
.target = acpi_cpufreq_target,
.init = acpi_cpufreq_cpu_init,
diff -r 9ba1541d6dc2 -r 605ef79ee46c xen/common/sysctl.c
--- a/xen/common/sysctl.c Wed Dec 10 13:27:14 2008 +0000
+++ b/xen/common/sysctl.c Wed Dec 10 13:27:41 2008 +0000
@@ -26,6 +26,7 @@
#include <xsm/xsm.h>
extern int do_get_pm_info(struct xen_sysctl_get_pmstat *op);
+extern int do_pm_op(struct xen_sysctl_pm_op *op);
extern long arch_do_sysctl(
struct xen_sysctl *op, XEN_GUEST_HANDLE(xen_sysctl_t) u_sysctl);
@@ -221,6 +222,21 @@ long do_sysctl(XEN_GUEST_HANDLE(xen_sysc
ret = -EFAULT;
break;
}
+ }
+ break;
+
+ case XEN_SYSCTL_pm_op:
+ {
+ ret = do_pm_op(&op->u.pm_op);
+ if ( ret && (ret != -EAGAIN) )
+ break;
+
+ if ( op->u.pm_op.cmd == GET_CPUFREQ_PARA )
+ if ( copy_to_guest(u_sysctl, op, 1) )
+ {
+ ret = -EFAULT;
+ break;
+ }
}
break;
diff -r 9ba1541d6dc2 -r 605ef79ee46c xen/drivers/acpi/pmstat.c
--- a/xen/drivers/acpi/pmstat.c Wed Dec 10 13:27:14 2008 +0000
+++ b/xen/drivers/acpi/pmstat.c Wed Dec 10 13:27:41 2008 +0000
@@ -47,6 +47,11 @@ extern int pmstat_get_cx_stat(uint32_t c
extern int pmstat_get_cx_stat(uint32_t cpuid, struct pm_cx_stat *stat);
extern int pmstat_reset_cx_stat(uint32_t cpuid);
+extern struct list_head cpufreq_governor_list;
+
+/*
+ * Get PM statistic info
+ */
int do_get_pm_info(struct xen_sysctl_get_pmstat *op)
{
int ret = 0;
@@ -156,3 +161,304 @@ int do_get_pm_info(struct xen_sysctl_get
return ret;
}
+
+/*
+ * 1. Get PM parameter
+ * 2. Provide user PM control
+ */
+static int read_scaling_available_governors(char *scaling_available_governors,
+ unsigned int size)
+{
+ unsigned int i = 0;
+ struct cpufreq_governor *t;
+
+ if ( !scaling_available_governors )
+ return -EINVAL;
+
+ list_for_each_entry(t, &cpufreq_governor_list, governor_list)
+ {
+ i += scnprintf(&scaling_available_governors[i],
+ CPUFREQ_NAME_LEN, "%s ", t->name);
+ if ( i > size )
+ return -EINVAL;
+ }
+ scaling_available_governors[i-1] = '\0';
+
+ return 0;
+}
+
+static int get_cpufreq_para(struct xen_sysctl_pm_op *op)
+{
+ uint32_t ret = 0;
+ const struct processor_pminfo *pmpt;
+ struct cpufreq_policy *policy;
+ uint32_t gov_num = 0;
+ uint32_t *affected_cpus;
+ uint32_t *scaling_available_frequencies;
+ char *scaling_available_governors;
+ struct list_head *pos;
+ uint32_t cpu, i, j = 0;
+
+ if ( !op || !cpu_online(op->cpuid) )
+ return -EINVAL;
+ pmpt = processor_pminfo[op->cpuid];
+ policy = cpufreq_cpu_policy[op->cpuid];
+
+ if ( !pmpt || !pmpt->perf.states ||
+ !policy || !policy->governor )
+ return -EINVAL;
+
+ list_for_each(pos, &cpufreq_governor_list)
+ gov_num++;
+
+ if ( (op->get_para.cpu_num != cpus_weight(policy->cpus)) ||
+ (op->get_para.freq_num != pmpt->perf.state_count) ||
+ (op->get_para.gov_num != gov_num) )
+ {
+ op->get_para.cpu_num = cpus_weight(policy->cpus);
+ op->get_para.freq_num = pmpt->perf.state_count;
+ op->get_para.gov_num = gov_num;
+ return -EAGAIN;
+ }
+
+ if ( !(affected_cpus = xmalloc_array(uint32_t, op->get_para.cpu_num)) )
+ return -ENOMEM;
+ memset(affected_cpus, 0, op->get_para.cpu_num * sizeof(uint32_t));
+ for_each_cpu_mask(cpu, policy->cpus)
+ affected_cpus[j++] = cpu;
+ ret = copy_to_guest(op->get_para.affected_cpus,
+ affected_cpus, op->get_para.cpu_num);
+ xfree(affected_cpus);
+ if ( ret )
+ return ret;
+
+ if ( !(scaling_available_frequencies =
+ xmalloc_array(uint32_t, op->get_para.freq_num)) )
+ return -ENOMEM;
+ memset(scaling_available_frequencies, 0,
+ op->get_para.freq_num * sizeof(uint32_t));
+ for ( i = 0; i < op->get_para.freq_num; i++ )
+ scaling_available_frequencies[i] =
+ pmpt->perf.states[i].core_frequency * 1000;
+ ret = copy_to_guest(op->get_para.scaling_available_frequencies,
+ scaling_available_frequencies, op->get_para.freq_num);
+ xfree(scaling_available_frequencies);
+ if ( ret )
+ return ret;
+
+ if ( !(scaling_available_governors =
+ xmalloc_array(char, gov_num * CPUFREQ_NAME_LEN)) )
+ return -ENOMEM;
+ memset(scaling_available_governors, 0,
+ gov_num * CPUFREQ_NAME_LEN * sizeof(char));
+ if ( (ret = read_scaling_available_governors(scaling_available_governors,
+ gov_num * CPUFREQ_NAME_LEN * sizeof(char))) )
+ {
+ xfree(scaling_available_governors);
+ return ret;
+ }
+ ret = copy_to_guest(op->get_para.scaling_available_governors,
+ scaling_available_governors, gov_num * CPUFREQ_NAME_LEN);
+ xfree(scaling_available_governors);
+ if ( ret )
+ return ret;
+
+ op->get_para.cpuinfo_cur_freq =
+ cpufreq_driver->get ? cpufreq_driver->get(op->cpuid) : policy->cur;
+ op->get_para.cpuinfo_max_freq = policy->cpuinfo.max_freq;
+ op->get_para.cpuinfo_min_freq = policy->cpuinfo.min_freq;
+ op->get_para.scaling_cur_freq = policy->cur;
+ op->get_para.scaling_max_freq = policy->max;
+ op->get_para.scaling_min_freq = policy->min;
+
+ if ( cpufreq_driver->name )
+ strlcpy(op->get_para.scaling_driver,
+ cpufreq_driver->name, CPUFREQ_NAME_LEN);
+ else
+ strlcpy(op->get_para.scaling_driver, "Unknown", CPUFREQ_NAME_LEN);
+
+ if ( policy->governor->name )
+ strlcpy(op->get_para.scaling_governor,
+ policy->governor->name, CPUFREQ_NAME_LEN);
+ else
+ strlcpy(op->get_para.scaling_governor, "Unknown", CPUFREQ_NAME_LEN);
+
+ /* governor specific para */
+ if ( !strnicmp(op->get_para.scaling_governor,
+ "userspace", CPUFREQ_NAME_LEN) )
+ {
+ op->get_para.u.userspace.scaling_setspeed = policy->cur;
+ }
+
+ if ( !strnicmp(op->get_para.scaling_governor,
+ "ondemand", CPUFREQ_NAME_LEN) )
+ {
+ ret = get_cpufreq_ondemand_para(
+ &op->get_para.u.ondemand.sampling_rate_max,
+ &op->get_para.u.ondemand.sampling_rate_min,
+ &op->get_para.u.ondemand.sampling_rate,
+ &op->get_para.u.ondemand.up_threshold);
+ }
+
+ return ret;
+}
+
+static int set_cpufreq_gov(struct xen_sysctl_pm_op *op)
+{
+ struct cpufreq_policy new_policy, *old_policy;
+
+ if ( !op || !cpu_online(op->cpuid) )
+ return -EINVAL;
+
+ old_policy = cpufreq_cpu_policy[op->cpuid];
+ if ( !old_policy )
+ return -EINVAL;
+
+ memcpy(&new_policy, old_policy, sizeof(struct cpufreq_policy));
+
+ new_policy.governor = __find_governor(op->set_gov.scaling_governor);
+ if (new_policy.governor == NULL)
+ return -EINVAL;
+
+ return __cpufreq_set_policy(old_policy, &new_policy);
+}
+
+static int set_cpufreq_para(struct xen_sysctl_pm_op *op)
+{
+ int ret = 0;
+ struct cpufreq_policy *policy;
+
+ if ( !op || !cpu_online(op->cpuid) )
+ return -EINVAL;
+ policy = cpufreq_cpu_policy[op->cpuid];
+
+ if ( !policy || !policy->governor )
+ return -EINVAL;
+
+ switch(op->set_para.ctrl_type)
+ {
+ case SCALING_MAX_FREQ:
+ {
+ struct cpufreq_policy new_policy;
+
+ memcpy(&new_policy, policy, sizeof(struct cpufreq_policy));
+ new_policy.max = op->set_para.ctrl_value;
+ ret = __cpufreq_set_policy(policy, &new_policy);
+
+ break;
+ }
+
+ case SCALING_MIN_FREQ:
+ {
+ struct cpufreq_policy new_policy;
+
+ memcpy(&new_policy, policy, sizeof(struct cpufreq_policy));
+ new_policy.min = op->set_para.ctrl_value;
+ ret = __cpufreq_set_policy(policy, &new_policy);
+
+ break;
+ }
+
+ case SCALING_SETSPEED:
+ {
+ unsigned int freq =op->set_para.ctrl_value;
+
+ if ( !strnicmp(policy->governor->name,
+ "userspace", CPUFREQ_NAME_LEN) )
+ {
+ if ( freq < policy->min )
+ freq = policy->min;
+ if ( freq > policy->max )
+ freq = policy->max;
+
+ ret = __cpufreq_driver_target(policy, freq, CPUFREQ_RELATION_L);
+ }
+ else
+ ret = -EINVAL;
+
+ break;
+ }
+
+ case SAMPLING_RATE:
+ {
+ unsigned int sampling_rate = op->set_para.ctrl_value;
+
+ if ( !strnicmp(policy->governor->name,
+ "ondemand", CPUFREQ_NAME_LEN) )
+ ret = write_ondemand_sampling_rate(sampling_rate);
+ else
+ ret = -EINVAL;
+
+ break;
+ }
+
+ case UP_THRESHOLD:
+ {
+ unsigned int up_threshold = op->set_para.ctrl_value;
+
+ if ( !strnicmp(policy->governor->name,
+ "ondemand", CPUFREQ_NAME_LEN) )
+ ret = write_ondemand_up_threshold(up_threshold);
+ else
+ ret = -EINVAL;
+
+ break;
+ }
+
+ default:
+ ret = -EINVAL;
+ break;
+ }
+
+ return ret;
+}
+
+int do_pm_op(struct xen_sysctl_pm_op *op)
+{
+ int ret = 0;
+ const struct processor_pminfo *pmpt;
+
+ if ( !op || !cpu_online(op->cpuid) )
+ return -EINVAL;
+ pmpt = processor_pminfo[op->cpuid];
+
+ switch ( op->cmd & PM_PARA_CATEGORY_MASK )
+ {
+ case CPUFREQ_PARA:
+ if ( !(xen_processor_pmbits & XEN_PROCESSOR_PM_PX) )
+ return -ENODEV;
+ if ( !pmpt || !(pmpt->perf.init & XEN_PX_INIT) )
+ return -EINVAL;
+ break;
+ default:
+ return -ENODEV;
+ }
+
+ switch ( op->cmd )
+ {
+ case GET_CPUFREQ_PARA:
+ {
+ ret = get_cpufreq_para(op);
+ break;
+ }
+
+ case SET_CPUFREQ_GOV:
+ {
+ ret = set_cpufreq_gov(op);
+ break;
+ }
+
+ case SET_CPUFREQ_PARA:
+ {
+ ret = set_cpufreq_para(op);
+ break;
+ }
+
+ default:
+ printk("not defined sub-hypercall @ do_pm_op\n");
+ ret = -ENOSYS;
+ break;
+ }
+
+ return ret;
+}
diff -r 9ba1541d6dc2 -r 605ef79ee46c xen/drivers/cpufreq/cpufreq.c
--- a/xen/drivers/cpufreq/cpufreq.c Wed Dec 10 13:27:14 2008 +0000
+++ b/xen/drivers/cpufreq/cpufreq.c Wed Dec 10 13:27:41 2008 +0000
@@ -53,9 +53,9 @@ struct cpufreq_dom {
};
static LIST_HEAD(cpufreq_dom_list_head);
-static LIST_HEAD(cpufreq_governor_list);
-
-static struct cpufreq_governor *__find_governor(const char *governor)
+LIST_HEAD(cpufreq_governor_list);
+
+struct cpufreq_governor *__find_governor(const char *governor)
{
struct cpufreq_governor *t;
diff -r 9ba1541d6dc2 -r 605ef79ee46c xen/drivers/cpufreq/cpufreq_ondemand.c
--- a/xen/drivers/cpufreq/cpufreq_ondemand.c Wed Dec 10 13:27:14 2008 +0000
+++ b/xen/drivers/cpufreq/cpufreq_ondemand.c Wed Dec 10 13:27:41 2008 +0000
@@ -51,11 +51,49 @@ static struct dbs_tuners {
unsigned int up_threshold;
unsigned int powersave_bias;
} dbs_tuners_ins = {
+ .sampling_rate = 0,
.up_threshold = DEF_FREQUENCY_UP_THRESHOLD,
.powersave_bias = 0,
};
static struct timer dbs_timer[NR_CPUS];
+
+int write_ondemand_sampling_rate(unsigned int sampling_rate)
+{
+ if ( (sampling_rate > MAX_SAMPLING_RATE / MICROSECS(1)) ||
+ (sampling_rate < MIN_SAMPLING_RATE / MICROSECS(1)) )
+ return -EINVAL;
+
+ dbs_tuners_ins.sampling_rate = sampling_rate * MICROSECS(1);
+ return 0;
+}
+
+int write_ondemand_up_threshold(unsigned int up_threshold)
+{
+ if ( (up_threshold > MAX_FREQUENCY_UP_THRESHOLD) ||
+ (up_threshold < MIN_FREQUENCY_UP_THRESHOLD) )
+ return -EINVAL;
+
+ dbs_tuners_ins.up_threshold = up_threshold;
+ return 0;
+}
+
+int get_cpufreq_ondemand_para(uint32_t *sampling_rate_max,
+ uint32_t *sampling_rate_min,
+ uint32_t *sampling_rate,
+ uint32_t *up_threshold)
+{
+ if (!sampling_rate_max || !sampling_rate_min ||
+ !sampling_rate || !up_threshold)
+ return -EINVAL;
+
+ *sampling_rate_max = MAX_SAMPLING_RATE/MICROSECS(1);
+ *sampling_rate_min = MIN_SAMPLING_RATE/MICROSECS(1);
+ *sampling_rate = dbs_tuners_ins.sampling_rate / MICROSECS(1);
+ *up_threshold = dbs_tuners_ins.up_threshold;
+
+ return 0;
+}
uint64_t get_cpu_idle_time(unsigned int cpu)
{
@@ -214,7 +252,7 @@ int cpufreq_governor_dbs(struct cpufreq_
* Start the timerschedule work, when this governor
* is used for first time
*/
- if (dbs_enable == 1) {
+ if ((dbs_enable == 1) && !dbs_tuners_ins.sampling_rate) {
def_sampling_rate = policy->cpuinfo.transition_latency *
DEF_SAMPLING_RATE_LATENCY_MULTIPLIER;
diff -r 9ba1541d6dc2 -r 605ef79ee46c xen/include/acpi/cpufreq/cpufreq.h
--- a/xen/include/acpi/cpufreq/cpufreq.h Wed Dec 10 13:27:14 2008 +0000
+++ b/xen/include/acpi/cpufreq/cpufreq.h Wed Dec 10 13:27:41 2008 +0000
@@ -16,8 +16,6 @@
#include <xen/cpumask.h>
#include "processor_perf.h"
-
-#define CPUFREQ_NAME_LEN 16
struct cpufreq_governor;
@@ -88,9 +86,14 @@ struct cpufreq_governor {
};
extern struct cpufreq_governor cpufreq_gov_dbs;
+extern struct cpufreq_governor cpufreq_gov_userspace;
+extern struct cpufreq_governor cpufreq_gov_performance;
+extern struct cpufreq_governor cpufreq_gov_powersave;
+
extern int cpufreq_register_governor(struct cpufreq_governor *governor);
extern int cpufreq_unregister_governor(struct cpufreq_governor *governor);
-#define CPUFREQ_DEFAULT_GOVERNOR &cpufreq_gov_dbs
+extern struct cpufreq_governor *__find_governor(const char *governor);
+#define CPUFREQ_DEFAULT_GOVERNOR &cpufreq_gov_performance
/* pass a target to the cpufreq driver */
extern int __cpufreq_driver_target(struct cpufreq_policy *policy,
@@ -113,6 +116,7 @@ __cpufreq_governor(struct cpufreq_policy
#define CPUFREQ_RELATION_H 1 /* highest frequency below or at target */
struct cpufreq_driver {
+ char name[CPUFREQ_NAME_LEN];
int (*init)(struct cpufreq_policy *policy);
int (*verify)(struct cpufreq_policy *policy);
int (*target)(struct cpufreq_policy *policy,
@@ -210,3 +214,9 @@ struct cpu_dbs_info_s {
};
int cpufreq_governor_dbs(struct cpufreq_policy *policy, unsigned int event);
+int get_cpufreq_ondemand_para(uint32_t *sampling_rate_max,
+ uint32_t *sampling_rate_min,
+ uint32_t *sampling_rate,
+ uint32_t *up_threshold);
+int write_ondemand_sampling_rate(unsigned int sampling_rate);
+int write_ondemand_up_threshold(unsigned int up_threshold);
diff -r 9ba1541d6dc2 -r 605ef79ee46c xen/include/public/sysctl.h
--- a/xen/include/public/sysctl.h Wed Dec 10 13:27:14 2008 +0000
+++ b/xen/include/public/sysctl.h Wed Dec 10 13:27:41 2008 +0000
@@ -273,6 +273,91 @@ typedef struct xen_sysctl_cpu_hotplug xe
typedef struct xen_sysctl_cpu_hotplug xen_sysctl_cpu_hotplug_t;
DEFINE_XEN_GUEST_HANDLE(xen_sysctl_cpu_hotplug_t);
+/*
+ * Get/set xen power management, include
+ * 1. cpufreq governors and related parameters
+ */
+#define XEN_SYSCTL_pm_op 12
+struct xen_userspace {
+ uint32_t scaling_setspeed;
+};
+typedef struct xen_userspace xen_userspace_t;
+
+struct xen_ondemand {
+ uint32_t sampling_rate_max;
+ uint32_t sampling_rate_min;
+
+ uint32_t sampling_rate;
+ uint32_t up_threshold;
+};
+typedef struct xen_ondemand xen_ondemand_t;
+
+/*
+ * cpufreq para name of this structure named
+ * same as sysfs file name of native linux
+ */
+#define CPUFREQ_NAME_LEN 16
+struct xen_get_cpufreq_para {
+ /* IN/OUT variable */
+ uint32_t cpu_num;
+ uint32_t freq_num;
+ uint32_t gov_num;
+
+ /* for all governors */
+ /* OUT variable */
+ XEN_GUEST_HANDLE_64(uint32) affected_cpus;
+ XEN_GUEST_HANDLE_64(uint32) scaling_available_frequencies;
+ XEN_GUEST_HANDLE_64(char) scaling_available_governors;
+ char scaling_driver[CPUFREQ_NAME_LEN];
+
+ uint32_t cpuinfo_cur_freq;
+ uint32_t cpuinfo_max_freq;
+ uint32_t cpuinfo_min_freq;
+ uint32_t scaling_cur_freq;
+
+ char scaling_governor[CPUFREQ_NAME_LEN];
+ uint32_t scaling_max_freq;
+ uint32_t scaling_min_freq;
+
+ /* for specific governor */
+ union {
+ struct xen_userspace userspace;
+ struct xen_ondemand ondemand;
+ } u;
+};
+
+struct xen_set_cpufreq_gov {
+ char scaling_governor[CPUFREQ_NAME_LEN];
+};
+
+struct xen_set_cpufreq_para {
+ #define SCALING_MAX_FREQ 1
+ #define SCALING_MIN_FREQ 2
+ #define SCALING_SETSPEED 3
+ #define SAMPLING_RATE 4
+ #define UP_THRESHOLD 5
+
+ uint32_t ctrl_type;
+ uint32_t ctrl_value;
+};
+
+struct xen_sysctl_pm_op {
+ #define PM_PARA_CATEGORY_MASK 0xf0
+ #define CPUFREQ_PARA 0x10
+
+ /* cpufreq command type */
+ #define GET_CPUFREQ_PARA (CPUFREQ_PARA | 0x01)
+ #define SET_CPUFREQ_GOV (CPUFREQ_PARA | 0x02)
+ #define SET_CPUFREQ_PARA (CPUFREQ_PARA | 0x03)
+
+ uint32_t cmd;
+ uint32_t cpuid;
+ union {
+ struct xen_get_cpufreq_para get_para;
+ struct xen_set_cpufreq_gov set_gov;
+ struct xen_set_cpufreq_para set_para;
+ };
+};
struct xen_sysctl {
uint32_t cmd;
@@ -289,6 +374,7 @@ struct xen_sysctl {
struct xen_sysctl_availheap availheap;
struct xen_sysctl_get_pmstat get_pmstat;
struct xen_sysctl_cpu_hotplug cpu_hotplug;
+ struct xen_sysctl_pm_op pm_op;
uint8_t pad[128];
} u;
};
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