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/******************************************************************************
* Subarch-specific domctl.c
*
* Copyright (c) 2013, Citrix Systems
*/
#include <xen/types.h>
#include <xen/lib.h>
#include <xen/errno.h>
#include <xen/sched.h>
#include <xen/hypercall.h>
#include <public/domctl.h>
#include <asm/cpufeature.h>
static long switch_mode(struct domain *d, enum domain_type type)
{
struct vcpu *v;
if ( d == NULL )
return -EINVAL;
if ( domain_tot_pages(d) != 0 )
return -EBUSY;
if ( d->arch.type == type )
return 0;
d->arch.type = type;
if ( is_64bit_domain(d) )
for_each_vcpu(d, v)
vcpu_switch_to_aarch64_mode(v);
return 0;
}
long subarch_do_domctl(struct xen_domctl *domctl, struct domain *d,
XEN_GUEST_HANDLE_PARAM(xen_domctl_t) u_domctl)
{
switch ( domctl->cmd )
{
case XEN_DOMCTL_set_address_size:
switch ( domctl->u.address_size.size )
{
case 32:
if ( !cpu_has_el1_32 )
return -EINVAL;
return switch_mode(d, DOMAIN_32BIT);
case 64:
return switch_mode(d, DOMAIN_64BIT);
default:
return -EINVAL;
}
break;
default:
return -ENOSYS;
}
}
/*
* Local variables:
* mode: C
* c-file-style: "BSD"
* c-basic-offset: 4
* tab-width: 4
* indent-tabs-mode: nil
* End:
*/
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