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/******************************************************************************
* Arch-specific sysctl.c
*
* System management operations. For use by node control stack.
*
* Copyright (c) 2002-2006, K Fraser
*/
#include <xen/config.h>
#include <xen/types.h>
#include <xen/lib.h>
#include <xen/mm.h>
#include <xen/guest_access.h>
#include <xen/hypercall.h>
#include <public/sysctl.h>
#include <xen/sched.h>
#include <xen/event.h>
#include <xen/domain_page.h>
#include <asm/msr.h>
#include <xen/trace.h>
#include <xen/console.h>
#include <xen/iocap.h>
#include <asm/irq.h>
#include <asm/hvm/hvm.h>
#include <asm/hvm/support.h>
#include <asm/processor.h>
#include <asm/numa.h>
#include <xen/nodemask.h>
#include <xen/cpu.h>
#include <xsm/xsm.h>
#define get_xen_guest_handle(val, hnd) do { val = (hnd).p; } while (0)
long cpu_up_helper(void *data)
{
int cpu = (unsigned long)data;
int ret = cpu_up(cpu);
if ( ret == -EBUSY )
{
/* On EBUSY, flush RCU work and have one more go. */
rcu_barrier();
ret = cpu_up(cpu);
}
return ret;
}
long cpu_down_helper(void *data)
{
int cpu = (unsigned long)data;
int ret = cpu_down(cpu);
if ( ret == -EBUSY )
{
/* On EBUSY, flush RCU work and have one more go. */
rcu_barrier();
ret = cpu_down(cpu);
}
return ret;
}
void arch_do_physinfo(xen_sysctl_physinfo_t *pi)
{
memcpy(pi->hw_cap, boot_cpu_data.x86_capability, NCAPINTS*4);
if ( hvm_enabled )
pi->capabilities |= XEN_SYSCTL_PHYSCAP_hvm;
if ( iommu_enabled )
pi->capabilities |= XEN_SYSCTL_PHYSCAP_hvm_directio;
}
long arch_do_sysctl(
struct xen_sysctl *sysctl, XEN_GUEST_HANDLE_PARAM(xen_sysctl_t) u_sysctl)
{
long ret = 0;
switch ( sysctl->cmd )
{
case XEN_SYSCTL_cpu_hotplug:
{
unsigned int cpu = sysctl->u.cpu_hotplug.cpu;
switch ( sysctl->u.cpu_hotplug.op )
{
case XEN_SYSCTL_CPU_HOTPLUG_ONLINE:
ret = xsm_resource_plug_core(XSM_HOOK);
if ( ret )
break;
ret = continue_hypercall_on_cpu(
0, cpu_up_helper, (void *)(unsigned long)cpu);
break;
case XEN_SYSCTL_CPU_HOTPLUG_OFFLINE:
ret = xsm_resource_unplug_core(XSM_HOOK);
if ( ret )
break;
ret = continue_hypercall_on_cpu(
0, cpu_down_helper, (void *)(unsigned long)cpu);
break;
default:
ret = -EINVAL;
break;
}
}
break;
default:
ret = -ENOSYS;
break;
}
return ret;
}
/*
* Local variables:
* mode: C
* c-file-style: "BSD"
* c-basic-offset: 4
* tab-width: 4
* indent-tabs-mode: nil
* End:
*/
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