int xc_psr_get_hw_info(xc_interface *xch, uint32_t socket,
xc_psr_feat_type type, xc_psr_hw_info *hw_info)
{
int rc = -1;
DECLARE_SYSCTL;
if ( !hw_info )
{
errno = EINVAL;
return rc;
}
sysctl.cmd = XEN_SYSCTL_psr_alloc;
sysctl.u.psr_alloc.target = socket;
switch ( type )
{
case XC_PSR_CAT_L2:
case XC_PSR_CAT_L3:
sysctl.u.psr_alloc.cmd = (type == XC_PSR_CAT_L2) ?
XEN_SYSCTL_PSR_get_l2_info :
XEN_SYSCTL_PSR_get_l3_info;
rc = xc_sysctl(xch, &sysctl);
if ( rc )
break;
hw_info->cat.cos_max = sysctl.u.psr_alloc.u.cat_info.cos_max;
hw_info->cat.cbm_len = sysctl.u.psr_alloc.u.cat_info.cbm_len;
hw_info->cat.cdp_enabled = (type == XC_PSR_CAT_L2) ?
false :
(sysctl.u.psr_alloc.u.cat_info.flags &
XEN_SYSCTL_PSR_CAT_L3_CDP);
break;
case XC_PSR_MBA:
sysctl.u.psr_alloc.cmd = XEN_SYSCTL_PSR_get_mba_info;
rc = xc_sysctl(xch, &sysctl);
if ( rc )
break;
hw_info->mba.cos_max = sysctl.u.psr_alloc.u.mba_info.cos_max;
hw_info->mba.thrtl_max = sysctl.u.psr_alloc.u.mba_info.thrtl_max;
hw_info->mba.linear = sysctl.u.psr_alloc.u.mba_info.flags &
XEN_SYSCTL_PSR_MBA_LINEAR;
break;
default:
errno = EOPNOTSUPP;
break;
}
return rc;
}
int main(int argc, char * argv[])
{
struct xen_sysctl sysctl;
int ret;
xc_interface *xc_handle = xc_interface_open(0,0,0);
sysctl.cmd = XEN_SYSCTL_tbuf_op;
sysctl.interface_version = XEN_SYSCTL_INTERFACE_VERSION;
sysctl.u.tbuf_op.cmd = XEN_SYSCTL_TBUFOP_get_info;
ret = xc_sysctl(xc_handle, &sysctl);
if ( ret != 0 )
{
perror("Failure to get event mask from Xen");
exit(1);
}
else
{
printf("Current event mask: 0x%.8x\n", sysctl.u.tbuf_op.evt_mask);
}
sysctl.cmd = XEN_SYSCTL_tbuf_op;
sysctl.interface_version = XEN_SYSCTL_INTERFACE_VERSION;
sysctl.u.tbuf_op.cmd = XEN_SYSCTL_TBUFOP_set_evt_mask;
sysctl.u.tbuf_op.evt_mask = XENMON;
ret = xc_sysctl(xc_handle, &sysctl);
printf("Setting mask to 0x%.8x\n", sysctl.u.tbuf_op.evt_mask);
if ( ret != 0 )
{
perror("Failure to get scheduler ID from Xen");
exit(1);
}
sysctl.cmd = XEN_SYSCTL_tbuf_op;
sysctl.interface_version = XEN_SYSCTL_INTERFACE_VERSION;
sysctl.u.tbuf_op.cmd = XEN_SYSCTL_TBUFOP_get_info;
ret = xc_sysctl(xc_handle, &sysctl);
if ( ret != 0 )
{
perror("Failure to get event mask from Xen");
exit(1);
}
else
{
printf("Current event mask: 0x%.8x\n", sysctl.u.tbuf_op.evt_mask);
}
xc_interface_close(xc_handle);
return 0;
}
int xc_domain_getinfolist(xc_interface *xch,
uint32_t first_domain,
unsigned int max_domains,
xc_domaininfo_t *info)
{
int ret = 0;
DECLARE_SYSCTL;
DECLARE_HYPERCALL_BOUNCE(info, max_domains*sizeof(*info), XC_HYPERCALL_BUFFER_BOUNCE_OUT);
if ( xc_hypercall_bounce_pre(xch, info) )
return -1;
sysctl.cmd = XEN_SYSCTL_getdomaininfolist;
sysctl.u.getdomaininfolist.first_domain = first_domain;
sysctl.u.getdomaininfolist.max_domains = max_domains;
set_xen_guest_handle(sysctl.u.getdomaininfolist.buffer, info);
if ( xc_sysctl(xch, &sysctl) < 0 )
ret = -1;
else
ret = sysctl.u.getdomaininfolist.num_domains;
xc_hypercall_bounce_post(xch, info);
return ret;
}
int xc_tbuf_get_size(int xc_handle, unsigned long *size)
{
struct t_info *t_info;
int rc;
DECLARE_SYSCTL;
sysctl.cmd = XEN_SYSCTL_tbuf_op;
sysctl.interface_version = XEN_SYSCTL_INTERFACE_VERSION;
sysctl.u.tbuf_op.cmd = XEN_SYSCTL_TBUFOP_get_info;
rc = xc_sysctl(xc_handle, &sysctl);
if ( rc != 0 )
return rc;
t_info = xc_map_foreign_range(xc_handle, DOMID_XEN,
sysctl.u.tbuf_op.size, PROT_READ | PROT_WRITE,
sysctl.u.tbuf_op.buffer_mfn);
if ( t_info == NULL || t_info->tbuf_size == 0 )
return -1;
*size = t_info->tbuf_size;
return 0;
}
int xc_psr_cmt_get_l3_cache_size(xc_interface *xch, uint32_t cpu,
uint32_t *l3_cache_size)
{
static int val = 0;
int rc;
DECLARE_SYSCTL;
if ( val )
{
*l3_cache_size = val;
return 0;
}
sysctl.cmd = XEN_SYSCTL_psr_cmt_op;
sysctl.u.psr_cmt_op.cmd =
XEN_SYSCTL_PSR_CMT_get_l3_cache_size;
sysctl.u.psr_cmt_op.flags = 0;
sysctl.u.psr_cmt_op.u.l3_cache.cpu = cpu;
rc = xc_sysctl(xch, &sysctl);
if ( !rc )
val = *l3_cache_size= sysctl.u.psr_cmt_op.u.data;
return rc;
}
int xc_domain_getinfolist(int xc_handle,
uint32_t first_domain,
unsigned int max_domains,
xc_domaininfo_t *info)
{
int ret = 0;
DECLARE_SYSCTL;
if ( lock_pages(info, max_domains*sizeof(xc_domaininfo_t)) != 0 )
return -1;
sysctl.cmd = XEN_SYSCTL_getdomaininfolist;
sysctl.u.getdomaininfolist.first_domain = first_domain;
sysctl.u.getdomaininfolist.max_domains = max_domains;
set_xen_guest_handle(sysctl.u.getdomaininfolist.buffer, info);
if ( xc_sysctl(xc_handle, &sysctl) < 0 )
ret = -1;
else
ret = sysctl.u.getdomaininfolist.num_domains;
unlock_pages(info, max_domains*sizeof(xc_domaininfo_t));
return ret;
}
int xc_tbuf_enable(xc_interface *xch, unsigned long pages, unsigned long *mfn,
unsigned long *size)
{
DECLARE_SYSCTL;
int rc;
/*
* Ignore errors (at least for now) as we get an error if size is already
* set (since trace buffers cannot be reallocated). If we really have no
* buffers at all then tbuf_enable() will fail, so this is safe.
*/
(void)xc_tbuf_set_size(xch, pages);
if ( tbuf_enable(xch, 1) != 0 )
return -1;
sysctl.cmd = XEN_SYSCTL_tbuf_op;
sysctl.interface_version = XEN_SYSCTL_INTERFACE_VERSION;
sysctl.u.tbuf_op.cmd = XEN_SYSCTL_TBUFOP_get_info;
rc = xc_sysctl(xch, &sysctl);
if ( rc == 0 )
{
*size = sysctl.u.tbuf_op.size;
*mfn = sysctl.u.tbuf_op.buffer_mfn;
}
return 0;
}
int xc_tbuf_get_size(xc_interface *xch, unsigned long *size)
{
struct t_info *t_info;
int rc;
DECLARE_SYSCTL;
sysctl.cmd = XEN_SYSCTL_tbuf_op;
sysctl.interface_version = XEN_SYSCTL_INTERFACE_VERSION;
sysctl.u.tbuf_op.cmd = XEN_SYSCTL_TBUFOP_get_info;
rc = xc_sysctl(xch, &sysctl);
if ( rc != 0 )
return rc;
t_info = xc_map_foreign_range(xch, DOMID_XEN,
sysctl.u.tbuf_op.size, PROT_READ | PROT_WRITE,
sysctl.u.tbuf_op.buffer_mfn);
if ( t_info == NULL || t_info->tbuf_size == 0 )
rc = -1;
else
*size = t_info->tbuf_size;
xenforeignmemory_unmap(xch->fmem, t_info, sysctl.u.tbuf_op.size);
return rc;
}
int xc_pm_get_cxstat(xc_interface *xch, int cpuid, struct xc_cx_stat *cxpt)
{
DECLARE_SYSCTL;
DECLARE_NAMED_HYPERCALL_BOUNCE(triggers, cxpt->triggers,
cxpt->nr * sizeof(*cxpt->triggers),
XC_HYPERCALL_BUFFER_BOUNCE_OUT);
DECLARE_NAMED_HYPERCALL_BOUNCE(residencies, cxpt->residencies,
cxpt->nr * sizeof(*cxpt->residencies),
XC_HYPERCALL_BUFFER_BOUNCE_OUT);
DECLARE_NAMED_HYPERCALL_BOUNCE(pc, cxpt->pc,
cxpt->nr_pc * sizeof(*cxpt->pc),
XC_HYPERCALL_BUFFER_BOUNCE_OUT);
DECLARE_NAMED_HYPERCALL_BOUNCE(cc, cxpt->cc,
cxpt->nr_cc * sizeof(*cxpt->cc),
XC_HYPERCALL_BUFFER_BOUNCE_OUT);
int ret = -1;
if ( xc_hypercall_bounce_pre(xch, triggers) )
goto unlock_0;
if ( xc_hypercall_bounce_pre(xch, residencies) )
goto unlock_1;
if ( xc_hypercall_bounce_pre(xch, pc) )
goto unlock_2;
if ( xc_hypercall_bounce_pre(xch, cc) )
goto unlock_3;
sysctl.cmd = XEN_SYSCTL_get_pmstat;
sysctl.u.get_pmstat.type = PMSTAT_get_cxstat;
sysctl.u.get_pmstat.cpuid = cpuid;
sysctl.u.get_pmstat.u.getcx.nr = cxpt->nr;
sysctl.u.get_pmstat.u.getcx.nr_pc = cxpt->nr_pc;
sysctl.u.get_pmstat.u.getcx.nr_cc = cxpt->nr_cc;
set_xen_guest_handle(sysctl.u.get_pmstat.u.getcx.triggers, triggers);
set_xen_guest_handle(sysctl.u.get_pmstat.u.getcx.residencies, residencies);
set_xen_guest_handle(sysctl.u.get_pmstat.u.getcx.pc, pc);
set_xen_guest_handle(sysctl.u.get_pmstat.u.getcx.cc, cc);
if ( (ret = xc_sysctl(xch, &sysctl)) )
goto unlock_4;
cxpt->nr = sysctl.u.get_pmstat.u.getcx.nr;
cxpt->last = sysctl.u.get_pmstat.u.getcx.last;
cxpt->idle_time = sysctl.u.get_pmstat.u.getcx.idle_time;
cxpt->nr_pc = sysctl.u.get_pmstat.u.getcx.nr_pc;
cxpt->nr_cc = sysctl.u.get_pmstat.u.getcx.nr_cc;
unlock_4:
xc_hypercall_bounce_post(xch, cc);
unlock_3:
xc_hypercall_bounce_post(xch, pc);
unlock_2:
xc_hypercall_bounce_post(xch, residencies);
unlock_1:
xc_hypercall_bounce_post(xch, triggers);
unlock_0:
return ret;
}
int xc_pm_reset_pxstat(xc_interface *xch, 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(xch, &sysctl);
}
int xc_pm_get_pxstat(xc_interface *xch, int cpuid, struct xc_px_stat *pxpt)
{
DECLARE_SYSCTL;
/* Sizes unknown until xc_pm_get_max_px */
DECLARE_NAMED_HYPERCALL_BOUNCE(trans, pxpt->trans_pt, 0, XC_HYPERCALL_BUFFER_BOUNCE_BOTH);
DECLARE_NAMED_HYPERCALL_BOUNCE(pt, pxpt->pt, 0, XC_HYPERCALL_BUFFER_BOUNCE_BOTH);
int max_px, ret;
if ( !pxpt->trans_pt || !pxpt->pt )
{
errno = EINVAL;
return -1;
}
if ( (ret = xc_pm_get_max_px(xch, cpuid, &max_px)) != 0)
return ret;
HYPERCALL_BOUNCE_SET_SIZE(trans, max_px * max_px * sizeof(uint64_t));
HYPERCALL_BOUNCE_SET_SIZE(pt, max_px * sizeof(struct xc_px_val));
if ( xc_hypercall_bounce_pre(xch, trans) )
return ret;
if ( xc_hypercall_bounce_pre(xch, pt) )
{
xc_hypercall_bounce_post(xch, trans);
return ret;
}
sysctl.cmd = XEN_SYSCTL_get_pmstat;
sysctl.u.get_pmstat.type = PMSTAT_get_pxstat;
sysctl.u.get_pmstat.cpuid = cpuid;
sysctl.u.get_pmstat.u.getpx.total = max_px;
set_xen_guest_handle(sysctl.u.get_pmstat.u.getpx.trans_pt, trans);
set_xen_guest_handle(sysctl.u.get_pmstat.u.getpx.pt, pt);
ret = xc_sysctl(xch, &sysctl);
if ( ret )
{
xc_hypercall_bounce_post(xch, trans);
xc_hypercall_bounce_post(xch, pt);
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;
xc_hypercall_bounce_post(xch, trans);
xc_hypercall_bounce_post(xch, pt);
return ret;
}
int xc_tbuf_set_size(xc_interface *xch, unsigned long size)
{
DECLARE_SYSCTL;
sysctl.cmd = XEN_SYSCTL_tbuf_op;
sysctl.interface_version = XEN_SYSCTL_INTERFACE_VERSION;
sysctl.u.tbuf_op.cmd = XEN_SYSCTL_TBUFOP_set_size;
sysctl.u.tbuf_op.size = size;
return xc_sysctl(xch, &sysctl);
}
static int tbuf_enable(xc_interface *xch, int enable)
{
DECLARE_SYSCTL;
sysctl.cmd = XEN_SYSCTL_tbuf_op;
sysctl.interface_version = XEN_SYSCTL_INTERFACE_VERSION;
if ( enable )
sysctl.u.tbuf_op.cmd = XEN_SYSCTL_TBUFOP_enable;
else
sysctl.u.tbuf_op.cmd = XEN_SYSCTL_TBUFOP_disable;
return xc_sysctl(xch, &sysctl);
}
int xc_pm_get_max_cx(xc_interface *xch, int cpuid, int *max_cx)
{
DECLARE_SYSCTL;
int ret = 0;
sysctl.cmd = XEN_SYSCTL_get_pmstat;
sysctl.u.get_pmstat.type = PMSTAT_get_max_cx;
sysctl.u.get_pmstat.cpuid = cpuid;
if ( (ret = xc_sysctl(xch, &sysctl)) != 0 )
return ret;
*max_cx = sysctl.u.get_pmstat.u.getcx.nr;
return ret;
}
int gcov_sysctl(int op, struct xen_sysctl *sysctl,
struct xc_hypercall_buffer *buf, uint32_t buf_size)
{
DECLARE_HYPERCALL_BUFFER_ARGUMENT(buf);
memset(sysctl, 0, sizeof(*sysctl));
sysctl->cmd = XEN_SYSCTL_gcov_op;
sysctl->u.gcov_op.cmd = op;
sysctl->u.gcov_op.size = buf_size;
set_xen_guest_handle(sysctl->u.gcov_op.buffer, buf);
return xc_sysctl(xch, sysctl);
}
/*
* Get PM statistic info
*/
int xc_pm_get_max_px(xc_interface *xch, 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(xch, &sysctl);
if ( ret )
return ret;
*max_px = sysctl.u.get_pmstat.u.getpx.total;
return ret;
}
int xc_psr_cmt_get_l3_event_mask(xc_interface *xch, uint32_t *event_mask)
{
int rc;
DECLARE_SYSCTL;
sysctl.cmd = XEN_SYSCTL_psr_cmt_op;
sysctl.u.psr_cmt_op.cmd =
XEN_SYSCTL_PSR_CMT_get_l3_event_mask;
sysctl.u.psr_cmt_op.flags = 0;
rc = xc_sysctl(xch, &sysctl);
if ( !rc )
*event_mask = sysctl.u.psr_cmt_op.u.data;
return rc;
}
int xc_set_cpufreq_para(xc_interface *xch, int cpuid,
int ctrl_type, int ctrl_value)
{
DECLARE_SYSCTL;
if ( !xch )
{
errno = EINVAL;
return -1;
}
sysctl.cmd = XEN_SYSCTL_pm_op;
sysctl.u.pm_op.cmd = SET_CPUFREQ_PARA;
sysctl.u.pm_op.cpuid = cpuid;
sysctl.u.pm_op.u.set_para.ctrl_type = ctrl_type;
sysctl.u.pm_op.u.set_para.ctrl_value = ctrl_value;
return xc_sysctl(xch, &sysctl);
}
int xc_set_cpufreq_gov(xc_interface *xch, int cpuid, char *govname)
{
DECLARE_SYSCTL;
char *scaling_governor = sysctl.u.pm_op.u.set_gov.scaling_governor;
if ( !xch || !govname )
{
errno = EINVAL;
return -1;
}
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 - 1] = '\0';
return xc_sysctl(xch, &sysctl);
}
int xc_get_cpufreq_avgfreq(xc_interface *xch, int cpuid, int *avg_freq)
{
int ret = 0;
DECLARE_SYSCTL;
if ( !xch || !avg_freq )
{
errno = EINVAL;
return -1;
}
sysctl.cmd = XEN_SYSCTL_pm_op;
sysctl.u.pm_op.cmd = GET_CPUFREQ_AVGFREQ;
sysctl.u.pm_op.cpuid = cpuid;
ret = xc_sysctl(xch, &sysctl);
*avg_freq = sysctl.u.pm_op.u.get_avgfreq;
return ret;
}
int xc_availheap(int xc_handle,
int min_width,
int max_width,
int node,
uint64_t *bytes)
{
DECLARE_SYSCTL;
int rc;
sysctl.cmd = XEN_SYSCTL_availheap;
sysctl.u.availheap.min_bitwidth = min_width;
sysctl.u.availheap.max_bitwidth = max_width;
sysctl.u.availheap.node = node;
rc = xc_sysctl(xc_handle, &sysctl);
*bytes = sysctl.u.availheap.avail_bytes;
return rc;
}
int xc_psr_cmt_get_total_rmid(xc_interface *xch, uint32_t *total_rmid)
{
static int val = 0;
int rc;
DECLARE_SYSCTL;
if ( val )
{
*total_rmid = val;
return 0;
}
sysctl.cmd = XEN_SYSCTL_psr_cmt_op;
sysctl.u.psr_cmt_op.cmd = XEN_SYSCTL_PSR_CMT_get_total_rmid;
sysctl.u.psr_cmt_op.flags = 0;
rc = xc_sysctl(xch, &sysctl);
if ( !rc )
val = *total_rmid = sysctl.u.psr_cmt_op.u.data;
return rc;
}
int xc_psr_cmt_get_l3_upscaling_factor(xc_interface *xch,
uint32_t *upscaling_factor)
{
static int val = 0;
int rc;
DECLARE_SYSCTL;
if ( val )
{
*upscaling_factor = val;
return 0;
}
sysctl.cmd = XEN_SYSCTL_psr_cmt_op;
sysctl.u.psr_cmt_op.cmd =
XEN_SYSCTL_PSR_CMT_get_l3_upscaling_factor;
sysctl.u.psr_cmt_op.flags = 0;
rc = xc_sysctl(xch, &sysctl);
if ( !rc )
val = *upscaling_factor = sysctl.u.psr_cmt_op.u.data;
return rc;
}
/*
* 1. Get PM parameter
* 2. Provide user PM control
*/
int xc_get_cpufreq_para(xc_interface *xch, 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.u.get_para;
DECLARE_NAMED_HYPERCALL_BOUNCE(affected_cpus,
user_para->affected_cpus,
user_para->cpu_num * sizeof(uint32_t), XC_HYPERCALL_BUFFER_BOUNCE_BOTH);
DECLARE_NAMED_HYPERCALL_BOUNCE(scaling_available_frequencies,
user_para->scaling_available_frequencies,
user_para->freq_num * sizeof(uint32_t), XC_HYPERCALL_BUFFER_BOUNCE_BOTH);
DECLARE_NAMED_HYPERCALL_BOUNCE(scaling_available_governors,
user_para->scaling_available_governors,
user_para->gov_num * CPUFREQ_NAME_LEN * sizeof(char), XC_HYPERCALL_BUFFER_BOUNCE_BOTH);
bool has_num = user_para->cpu_num &&
user_para->freq_num &&
user_para->gov_num;
if ( has_num )
{
if ( (!user_para->affected_cpus) ||
(!user_para->scaling_available_frequencies) ||
(!user_para->scaling_available_governors) )
{
errno = EINVAL;
return -1;
}
if ( xc_hypercall_bounce_pre(xch, affected_cpus) )
goto unlock_1;
if ( xc_hypercall_bounce_pre(xch, scaling_available_frequencies) )
goto unlock_2;
if ( xc_hypercall_bounce_pre(xch, scaling_available_governors) )
goto unlock_3;
set_xen_guest_handle(sys_para->affected_cpus, affected_cpus);
set_xen_guest_handle(sys_para->scaling_available_frequencies, scaling_available_frequencies);
set_xen_guest_handle(sys_para->scaling_available_governors, 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(xch, &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;
user_para->turbo_enabled = sys_para->turbo_enabled;
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 */
XC_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:
xc_hypercall_bounce_post(xch, scaling_available_governors);
unlock_3:
xc_hypercall_bounce_post(xch, scaling_available_frequencies);
unlock_2:
xc_hypercall_bounce_post(xch, affected_cpus);
unlock_1:
return ret;
}