/*
* Currently all CPUs are redenzevous at the MCE softirq handler, no
* need to consider paging p2m type
* Currently only support HVM guest with EPT paging mode
* XXX following situation missed:
* PoD, Foreign mapped, Granted, Shared
*/
int unmmap_broken_page(struct domain *d, mfn_t mfn, unsigned long gfn)
{
mfn_t r_mfn;
p2m_type_t pt;
int rc;
/* Always trust dom0's MCE handler will prevent future access */
if ( d == dom0 )
return 0;
if (!mfn_valid(mfn_x(mfn)))
return -EINVAL;
if ( !has_hvm_container_domain(d) || !paging_mode_hap(d) )
return -ENOSYS;
rc = -1;
r_mfn = get_gfn_query(d, gfn, &pt);
if ( p2m_to_mask(pt) & P2M_UNMAP_TYPES)
{
ASSERT(mfn_x(r_mfn) == mfn_x(mfn));
p2m_change_type(d, gfn, pt, p2m_ram_broken);
rc = 0;
}
put_gfn(d, gfn);
return rc;
}
static void hap_clean_vram_tracking(struct domain *d)
{
int i;
struct sh_dirty_vram *dirty_vram = d->arch.hvm_domain.dirty_vram;
if ( !dirty_vram )
return;
/* set l1e entries of P2M table to be read-only. */
for (i = dirty_vram->begin_pfn; i < dirty_vram->end_pfn; i++)
p2m_change_type(p2m_get_hostp2m(d), i, p2m_ram_rw, p2m_ram_logdirty);
flush_tlb_mask(&d->domain_dirty_cpumask);
}
static int hap_disable_vram_tracking(struct domain *d)
{
int i;
struct sh_dirty_vram *dirty_vram = d->arch.hvm_domain.dirty_vram;
if ( !dirty_vram )
return -EINVAL;
hap_lock(d);
d->arch.paging.mode &= ~PG_log_dirty;
hap_unlock(d);
/* set l1e entries of P2M table with normal mode */
for (i = dirty_vram->begin_pfn; i < dirty_vram->end_pfn; i++)
p2m_change_type(p2m_get_hostp2m(d), i, p2m_ram_logdirty, p2m_ram_rw);
flush_tlb_mask(&d->domain_dirty_cpumask);
return 0;
}
static int hap_enable_vram_tracking(struct domain *d)
{
int i;
struct sh_dirty_vram *dirty_vram = d->arch.hvm_domain.dirty_vram;
if ( !dirty_vram )
return -EINVAL;
/* turn on PG_log_dirty bit in paging mode */
hap_lock(d);
d->arch.paging.mode |= PG_log_dirty;
hap_unlock(d);
/* set l1e entries of P2M table to be read-only. */
for (i = dirty_vram->begin_pfn; i < dirty_vram->end_pfn; i++)
p2m_change_type(p2m_get_hostp2m(d), i, p2m_ram_rw, p2m_ram_logdirty);
flush_tlb_mask(&d->domain_dirty_cpumask);
return 0;
}
