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Rework the list of all pmaps: embed the list link into pmap.

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This commit is contained in:
Ruslan Bukin 2016-04-26 14:38:18 +00:00
parent 8123f597e9
commit 9af9422682
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=298641
2 changed files with 12 additions and 24 deletions
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8
sys/riscv/include/pmap.h
View file

@ -74,18 +74,12 @@ struct pv_addr {
vm_paddr_t pv_pa;
};
/* An entry in the list of all pmaps */
struct pmap_list_entry {
SLIST_ENTRY(pmap_list_entry) pmap_link;
struct pmap *pmap;
};
struct pmap {
struct mtx pm_mtx;
struct pmap_statistics pm_stats; /* pmap statictics */
pd_entry_t *pm_l1;
TAILQ_HEAD(,pv_chunk) pm_pvchunk; /* list of mappings in pmap */
struct pmap_list_entry *p_entry; /* Place in the list of all pmaps */
LIST_ENTRY(pmap) pm_list; /* List of all pmaps */
};
typedef struct pv_entry {

28
sys/riscv/riscv/pmap.c
View file

@ -207,9 +207,9 @@ __FBSDID("$FreeBSD$");
#define VM_PAGE_TO_PV_LIST_LOCK(m) \
PHYS_TO_PV_LIST_LOCK(VM_PAGE_TO_PHYS(m))
/* The list of all the pmaps */
static SLIST_HEAD(, pmap_list_entry) pmap_list =
SLIST_HEAD_INITIALIZER(pmap_list);
/* The list of all the user pmaps */
LIST_HEAD(pmaplist, pmap);
static struct pmaplist allpmaps;
static MALLOC_DEFINE(M_VMPMAP, "pmap", "PMAP L1");
@ -416,7 +416,6 @@ static void
pmap_distribute_l1(struct pmap *pmap, vm_pindex_t l1index,
pt_entry_t entry)
{
struct pmap_list_entry *p_entry;
struct pmap *user_pmap;
pd_entry_t *l1;
@ -424,8 +423,7 @@ pmap_distribute_l1(struct pmap *pmap, vm_pindex_t l1index,
if (pmap != kernel_pmap)
return;
SLIST_FOREACH(p_entry, &pmap_list, pmap_link) {
user_pmap = p_entry->pmap;
LIST_FOREACH(user_pmap, &allpmaps, pm_list) {
l1 = &user_pmap->pm_l1[l1index];
if (entry)
pmap_load_store(l1, entry);
@ -569,6 +567,8 @@ pmap_bootstrap(vm_offset_t l1pt, vm_paddr_t kernstart, vm_size_t kernlen)
*/
rw_init(&pvh_global_lock, "pmap pv global");
LIST_INIT(&allpmaps);
/* Assume the address we were loaded to is a valid physical address */
min_pa = KERNBASE - kern_delta;
@ -1177,7 +1177,6 @@ pmap_pinit0(pmap_t pmap)
int
pmap_pinit(pmap_t pmap)
{
struct pmap_list_entry *p_entry;
vm_paddr_t l1phys;
vm_page_t l1pt;
@ -1199,12 +1198,8 @@ pmap_pinit(pmap_t pmap)
/* Install kernel pagetables */
memcpy(pmap->pm_l1, kernel_pmap->pm_l1, PAGE_SIZE);
p_entry = malloc(sizeof(struct pmap_list_entry), M_VMPMAP, M_WAITOK);
p_entry->pmap = pmap;
pmap->p_entry = p_entry;
/* Add to the list of all pmaps */
SLIST_INSERT_HEAD(&pmap_list, p_entry, pmap_link);
/* Add to the list of all user pmaps */
LIST_INSERT_HEAD(&allpmaps, pmap, pm_list);
return (1);
}
@ -1374,12 +1369,11 @@ pmap_release(pmap_t pmap)
atomic_subtract_int(&vm_cnt.v_wire_count, 1);
vm_page_free_zero(m);
/* Remove pmap from the allpmaps list */
LIST_REMOVE(pmap, pm_list);
/* Remove kernel pagetables */
bzero(pmap->pm_l1, PAGE_SIZE);
/* Remove pmap from the all pmaps list */
SLIST_REMOVE(&pmap_list, pmap->p_entry,
pmap_list_entry, pmap_link);
}
#if 0