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#include <xen/config.h>
#include <xen/init.h>
#include <xen/lib.h>
#include <xen/errno.h>
#include <xen/guest_access.h>
#include <xen/sched.h>
#include <xsm/xsm.h>
#include <public/xen.h>
#include <public/hvm/params.h>
#include <public/hvm/hvm_op.h>
#include <asm/hypercall.h>
long do_hvm_op(unsigned long op, XEN_GUEST_HANDLE_PARAM(void) arg)
{
long rc = 0;
switch ( op )
{
case HVMOP_set_param:
case HVMOP_get_param:
{
struct xen_hvm_param a;
struct domain *d;
if ( copy_from_guest(&a, arg, 1) )
return -EFAULT;
if ( a.index >= HVM_NR_PARAMS )
return -EINVAL;
d = rcu_lock_domain_by_any_id(a.domid);
if ( d == NULL )
return -ESRCH;
rc = xsm_hvm_param(XSM_TARGET, d, op);
if ( rc )
goto param_fail;
if ( op == HVMOP_set_param )
{
d->arch.hvm_domain.params[a.index] = a.value;
}
else
{
a.value = d->arch.hvm_domain.params[a.index];
rc = copy_to_guest(arg, &a, 1) ? -EFAULT : 0;
}
param_fail:
rcu_unlock_domain(d);
break;
}
default:
{
printk("%s: Bad HVM op %ld.\n", __func__, op);
rc = -ENOSYS;
break;
}
}
return rc;
}
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