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Synchronize access to the allpmaps list.

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The list will be removed with some future work.

Reviewed by:	jhb
MFC after:	1 week
Sponsored by:	The FreeBSD Foundation
Differential Revision:	https://reviews.freebsd.org/D18721
This commit is contained in:
Mark Johnston 2019-01-03 16:24:03 +00:00
parent 60af34002e
commit bad66a29d4
1 changed files with 9 additions and 1 deletions
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10
sys/riscv/riscv/pmap.c
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@ -228,6 +228,7 @@ CTASSERT((DMAP_MIN_ADDRESS & ~L1_OFFSET) == DMAP_MIN_ADDRESS);
CTASSERT((DMAP_MAX_ADDRESS & ~L1_OFFSET) == DMAP_MAX_ADDRESS);
static struct rwlock_padalign pvh_global_lock;
static struct mtx_padalign allpmaps_lock;
/*
* Data for the pv entry allocation mechanism
@ -380,10 +381,12 @@ pmap_distribute_l1(struct pmap *pmap, vm_pindex_t l1index,
if (pmap != kernel_pmap)
return;
mtx_lock(&allpmaps_lock);
LIST_FOREACH(user_pmap, &allpmaps, pm_list) {
l1 = &user_pmap->pm_l1[l1index];
pmap_store(l1, entry);
}
mtx_unlock(&allpmaps_lock);
}
static pt_entry_t *
@ -636,9 +639,10 @@ pmap_init(void)
int i;
/*
* Initialize the pv chunk list mutex.
* Initialize the pv chunk and pmap list mutexes.
*/
mtx_init(&pv_chunks_mutex, "pmap pv chunk list", NULL, MTX_DEF);
mtx_init(&allpmaps_lock, "allpmaps", NULL, MTX_DEF);
/*
* Initialize the pool of pv list locks.
@ -1132,7 +1136,9 @@ pmap_pinit(pmap_t pmap)
memcpy(pmap->pm_l1, kernel_pmap->pm_l1, PAGE_SIZE);
/* Add to the list of all user pmaps */
mtx_lock(&allpmaps_lock);
LIST_INSERT_HEAD(&allpmaps, pmap, pm_list);
mtx_unlock(&allpmaps_lock);
return (1);
}
@ -1296,7 +1302,9 @@ pmap_release(pmap_t pmap)
vm_page_free_zero(m);
/* Remove pmap from the allpmaps list */
mtx_lock(&allpmaps_lock);
LIST_REMOVE(pmap, pm_list);
mtx_unlock(&allpmaps_lock);
/* Remove kernel pagetables */
bzero(pmap->pm_l1, PAGE_SIZE);