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Obtained from:	ABT Systems Ltd
MFC after:	1 month
Sponsored by:	The FreeBSD Foundation
This commit is contained in:
Andrew Turner 2016-08-22 12:17:40 +00:00
parent 109dddc015
commit aed6b9701b
1 changed files with 31 additions and 2 deletions
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33
sys/arm64/arm64/pmap.c
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@ -874,6 +874,21 @@ pmap_init(void)
rw_init(&pv_list_locks[i], "pmap pv list");
}
static SYSCTL_NODE(_vm_pmap, OID_AUTO, l2, CTLFLAG_RD, 0,
"2MB page mapping counters");
static u_long pmap_l2_demotions;
SYSCTL_ULONG(_vm_pmap_l2, OID_AUTO, demotions, CTLFLAG_RD,
&pmap_l2_demotions, 0, "2MB page demotions");
static u_long pmap_l2_p_failures;
SYSCTL_ULONG(_vm_pmap_l2, OID_AUTO, p_failures, CTLFLAG_RD,
&pmap_l2_p_failures, 0, "2MB page promotion failures");
static u_long pmap_l2_promotions;
SYSCTL_ULONG(_vm_pmap_l2, OID_AUTO, promotions, CTLFLAG_RD,
&pmap_l2_promotions, 0, "2MB page promotions");
/*
* Invalidate a single TLB entry.
*/
@ -2309,14 +2324,22 @@ pmap_promote_l2(pmap_t pmap, pd_entry_t *l2, vm_offset_t va,
return;
/* Check the alingment is valid */
if (((newl2 & ~ATTR_MASK) & L2_OFFSET) != 0)
if (((newl2 & ~ATTR_MASK) & L2_OFFSET) != 0) {
atomic_add_long(&pmap_l2_p_failures, 1);
CTR2(KTR_PMAP, "pmap_promote_l2: failure for va %#lx"
" in pmap %p", va, pmap);
return;
}
pa = newl2 + L2_SIZE - PAGE_SIZE;
for (l3 = firstl3 + NL3PG - 1; l3 > firstl3; l3--) {
oldl3 = pmap_load(l3);
if (oldl3 != pa)
if (oldl3 != pa) {
atomic_add_long(&pmap_l2_p_failures, 1);
CTR2(KTR_PMAP, "pmap_promote_l2: failure for va %#lx"
" in pmap %p", va, pmap);
return;
}
pa -= PAGE_SIZE;
}
@ -2324,6 +2347,8 @@ pmap_promote_l2(pmap_t pmap, pd_entry_t *l2, vm_offset_t va,
newl2 |= L2_BLOCK;
pmap_update_entry(pmap, l2, newl2, sva, L2_SIZE);
atomic_add_long(&pmap_l2_promotions, 1);
}
/*
@ -3745,6 +3770,10 @@ pmap_demote_l2_locked(pmap_t pmap, pt_entry_t *l2, vm_offset_t va,
pmap_update_entry(pmap, l2, l3phys | L2_TABLE, va, PAGE_SIZE);
atomic_add_long(&pmap_l2_demotions, 1);
CTR3(KTR_PMAP, "pmap_demote_l2: success for va %#lx"
" in pmap %p %lx", va, pmap, l3[0]);
if (tmpl2 != 0) {
pmap_kremove(tmpl2);
kva_free(tmpl2, PAGE_SIZE);