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/******************************************************************************
* Arch-specific domctl.c
*
* Copyright (c) 2012, Citrix Systems
*/
#include <xen/errno.h>
#include <xen/guest_access.h>
#include <xen/hypercall.h>
#include <xen/iocap.h>
#include <xen/lib.h>
#include <xen/mm.h>
#include <xen/sched.h>
#include <xen/types.h>
#include <xsm/xsm.h>
#include <public/domctl.h>
void arch_get_domain_info(const struct domain *d,
struct xen_domctl_getdomaininfo *info)
{
/* All ARM domains use hardware assisted paging. */
info->flags |= XEN_DOMINF_hap;
info->gpaddr_bits = p2m_ipa_bits;
}
static int handle_vuart_init(struct domain *d,
struct xen_domctl_vuart_op *vuart_op)
{
int rc;
struct vpl011_init_info info;
info.console_domid = vuart_op->console_domid;
info.gfn = _gfn(vuart_op->gfn);
if ( d->creation_finished )
return -EPERM;
if ( vuart_op->type != XEN_DOMCTL_VUART_TYPE_VPL011 )
return -EOPNOTSUPP;
rc = domain_vpl011_init(d, &info);
if ( !rc )
vuart_op->evtchn = info.evtchn;
return rc;
}
long arch_do_domctl(struct xen_domctl *domctl, struct domain *d,
XEN_GUEST_HANDLE_PARAM(xen_domctl_t) u_domctl)
{
switch ( domctl->cmd )
{
case XEN_DOMCTL_cacheflush:
{
gfn_t s = _gfn(domctl->u.cacheflush.start_pfn);
gfn_t e = gfn_add(s, domctl->u.cacheflush.nr_pfns);
int rc;
if ( domctl->u.cacheflush.nr_pfns > (1U<<MAX_ORDER) )
return -EINVAL;
if ( gfn_x(e) < gfn_x(s) )
return -EINVAL;
/* XXX: Handle preemption */
do
rc = p2m_cache_flush_range(d, &s, e);
while ( rc == -ERESTART );
return rc;
}
case XEN_DOMCTL_bind_pt_irq:
{
int rc;
struct xen_domctl_bind_pt_irq *bind = &domctl->u.bind_pt_irq;
uint32_t irq = bind->u.spi.spi;
uint32_t virq = bind->machine_irq;
/* We only support PT_IRQ_TYPE_SPI */
if ( bind->irq_type != PT_IRQ_TYPE_SPI )
return -EOPNOTSUPP;
/*
* XXX: For now map the interrupt 1:1. Other support will require to
* modify domain_pirq_to_irq macro.
*/
if ( irq != virq )
return -EINVAL;
/*
* ARM doesn't require separating IRQ assignation into 2
* hypercalls (PHYSDEVOP_map_pirq and DOMCTL_bind_pt_irq).
*
* Call xsm_map_domain_irq in order to keep the same XSM checks
* done by the 2 hypercalls for consistency with other
* architectures.
*/
rc = xsm_map_domain_irq(XSM_HOOK, d, irq, NULL);
if ( rc )
return rc;
rc = xsm_bind_pt_irq(XSM_HOOK, d, bind);
if ( rc )
return rc;
if ( !irq_access_permitted(current->domain, irq) )
return -EPERM;
if ( !vgic_reserve_virq(d, virq) )
return -EBUSY;
rc = route_irq_to_guest(d, virq, irq, "routed IRQ");
if ( rc )
vgic_free_virq(d, virq);
return rc;
}
case XEN_DOMCTL_unbind_pt_irq:
{
int rc;
struct xen_domctl_bind_pt_irq *bind = &domctl->u.bind_pt_irq;
uint32_t irq = bind->u.spi.spi;
uint32_t virq = bind->machine_irq;
/* We only support PT_IRQ_TYPE_SPI */
if ( bind->irq_type != PT_IRQ_TYPE_SPI )
return -EOPNOTSUPP;
/* For now map the interrupt 1:1 */
if ( irq != virq )
return -EINVAL;
rc = xsm_unbind_pt_irq(XSM_HOOK, d, bind);
if ( rc )
return rc;
if ( !irq_access_permitted(current->domain, irq) )
return -EPERM;
rc = release_guest_irq(d, virq);
if ( rc )
return rc;
vgic_free_virq(d, virq);
return 0;
}
case XEN_DOMCTL_vuart_op:
{
int rc;
unsigned int i;
struct xen_domctl_vuart_op *vuart_op = &domctl->u.vuart_op;
/* check that structure padding must be 0. */
for ( i = 0; i < sizeof(vuart_op->pad); i++ )
if ( vuart_op->pad[i] )
return -EINVAL;
switch( vuart_op->cmd )
{
case XEN_DOMCTL_VUART_OP_INIT:
rc = handle_vuart_init(d, vuart_op);
break;
default:
rc = -EINVAL;
break;
}
if ( !rc )
rc = copy_to_guest(u_domctl, domctl, 1);
return rc;
}
default:
{
int rc;
rc = subarch_do_domctl(domctl, d, u_domctl);
if ( rc == -ENOSYS )
rc = iommu_do_domctl(domctl, d, u_domctl);
return rc;
}
}
}
void arch_get_info_guest(struct vcpu *v, vcpu_guest_context_u c)
{
struct vcpu_guest_context *ctxt = c.nat;
struct vcpu_guest_core_regs *regs = &c.nat->user_regs;
vcpu_regs_hyp_to_user(v, regs);
ctxt->sctlr = v->arch.sctlr;
ctxt->ttbr0 = v->arch.ttbr0;
ctxt->ttbr1 = v->arch.ttbr1;
ctxt->ttbcr = v->arch.ttbcr;
if ( !test_bit(_VPF_down, &v->pause_flags) )
ctxt->flags |= VGCF_online;
}
/*
* Local variables:
* mode: C
* c-file-style: "BSD"
* c-basic-offset: 4
* tab-width: 4
* indent-tabs-mode: nil
* End:
*/
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