[PATCH v6 15/33] s390: Convert various gmap functions to use ptdescs
Vishal Moola (Oracle)
vishal.moola at gmail.com
Mon Jun 26 20:14:13 PDT 2023
In order to split struct ptdesc from struct page, convert various
functions to use ptdescs.
Some of the functions use the *get*page*() helper functions. Convert
these to use pagetable_alloc() and ptdesc_address() instead to help
standardize page tables further.
Since we're now using pagetable_free(), set _pt_s390_gaddr (which
aliases with page->mapping) to NULL in that function instead.
Signed-off-by: Vishal Moola (Oracle) <vishal.moola at gmail.com>
Acked-by: Mike Rapoport (IBM) <rppt at kernel.org>
---
arch/s390/mm/gmap.c | 217 +++++++++++++++++++++++---------------------
include/linux/mm.h | 3 +
2 files changed, 117 insertions(+), 103 deletions(-)
diff --git a/arch/s390/mm/gmap.c b/arch/s390/mm/gmap.c
index beb4804d9ca8..8dbe0fdc0e44 100644
--- a/arch/s390/mm/gmap.c
+++ b/arch/s390/mm/gmap.c
@@ -34,7 +34,7 @@
static struct gmap *gmap_alloc(unsigned long limit)
{
struct gmap *gmap;
- struct page *page;
+ struct ptdesc *ptdesc;
unsigned long *table;
unsigned long etype, atype;
@@ -67,12 +67,12 @@ static struct gmap *gmap_alloc(unsigned long limit)
spin_lock_init(&gmap->guest_table_lock);
spin_lock_init(&gmap->shadow_lock);
refcount_set(&gmap->ref_count, 1);
- page = alloc_pages(GFP_KERNEL_ACCOUNT, CRST_ALLOC_ORDER);
- if (!page)
+ ptdesc = pagetable_alloc(GFP_KERNEL_ACCOUNT, CRST_ALLOC_ORDER);
+ if (!ptdesc)
goto out_free;
- page->_pt_s390_gaddr = 0;
- list_add(&page->lru, &gmap->crst_list);
- table = page_to_virt(page);
+ ptdesc->_pt_s390_gaddr = 0;
+ list_add(&ptdesc->pt_list, &gmap->crst_list);
+ table = ptdesc_to_virt(ptdesc);
crst_table_init(table, etype);
gmap->table = table;
gmap->asce = atype | _ASCE_TABLE_LENGTH |
@@ -181,25 +181,23 @@ static void gmap_rmap_radix_tree_free(struct radix_tree_root *root)
*/
static void gmap_free(struct gmap *gmap)
{
- struct page *page, *next;
+ struct ptdesc *ptdesc, *next;
/* Flush tlb of all gmaps (if not already done for shadows) */
if (!(gmap_is_shadow(gmap) && gmap->removed))
gmap_flush_tlb(gmap);
/* Free all segment & region tables. */
- list_for_each_entry_safe(page, next, &gmap->crst_list, lru) {
- page->_pt_s390_gaddr = 0;
- __free_pages(page, CRST_ALLOC_ORDER);
+ list_for_each_entry_safe(ptdesc, next, &gmap->crst_list, pt_list) {
+ pagetable_free(ptdesc);
}
gmap_radix_tree_free(&gmap->guest_to_host);
gmap_radix_tree_free(&gmap->host_to_guest);
/* Free additional data for a shadow gmap */
if (gmap_is_shadow(gmap)) {
- /* Free all page tables. */
- list_for_each_entry_safe(page, next, &gmap->pt_list, lru) {
- page->_pt_s390_gaddr = 0;
- page_table_free_pgste(page);
+ /* Free all ptdesc tables. */
+ list_for_each_entry_safe(ptdesc, next, &gmap->pt_list, pt_list) {
+ page_table_free_pgste(ptdesc_page(ptdesc));
}
gmap_rmap_radix_tree_free(&gmap->host_to_rmap);
/* Release reference to the parent */
@@ -308,28 +306,27 @@ EXPORT_SYMBOL_GPL(gmap_get_enabled);
static int gmap_alloc_table(struct gmap *gmap, unsigned long *table,
unsigned long init, unsigned long gaddr)
{
- struct page *page;
+ struct ptdesc *ptdesc;
unsigned long *new;
/* since we dont free the gmap table until gmap_free we can unlock */
- page = alloc_pages(GFP_KERNEL_ACCOUNT, CRST_ALLOC_ORDER);
- if (!page)
+ ptdesc = pagetable_alloc(GFP_KERNEL_ACCOUNT, CRST_ALLOC_ORDER);
+ if (!ptdesc)
return -ENOMEM;
- new = page_to_virt(page);
+ new = ptdesc_to_virt(ptdesc);
crst_table_init(new, init);
spin_lock(&gmap->guest_table_lock);
if (*table & _REGION_ENTRY_INVALID) {
- list_add(&page->lru, &gmap->crst_list);
+ list_add(&ptdesc->pt_list, &gmap->crst_list);
*table = __pa(new) | _REGION_ENTRY_LENGTH |
(*table & _REGION_ENTRY_TYPE_MASK);
- page->_pt_s390_gaddr = gaddr;
- page = NULL;
+ ptdesc->_pt_s390_gaddr = gaddr;
+ ptdesc = NULL;
}
spin_unlock(&gmap->guest_table_lock);
- if (page) {
- page->_pt_s390_gaddr = 0;
- __free_pages(page, CRST_ALLOC_ORDER);
- }
+ if (ptdesc)
+ pagetable_free(ptdesc);
+
return 0;
}
@@ -341,15 +338,15 @@ static int gmap_alloc_table(struct gmap *gmap, unsigned long *table,
*/
static unsigned long __gmap_segment_gaddr(unsigned long *entry)
{
- struct page *page;
+ struct ptdesc *ptdesc;
unsigned long offset, mask;
offset = (unsigned long) entry / sizeof(unsigned long);
offset = (offset & (PTRS_PER_PMD - 1)) * PMD_SIZE;
mask = ~(PTRS_PER_PMD * sizeof(pmd_t) - 1);
- page = virt_to_page((void *)((unsigned long) entry & mask));
+ ptdesc = virt_to_ptdesc((void *)((unsigned long) entry & mask));
- return page->_pt_s390_gaddr + offset;
+ return ptdesc->_pt_s390_gaddr + offset;
}
/**
@@ -1345,6 +1342,7 @@ static void gmap_unshadow_pgt(struct gmap *sg, unsigned long raddr)
unsigned long *ste;
phys_addr_t sto, pgt;
struct page *page;
+ struct ptdesc *ptdesc;
BUG_ON(!gmap_is_shadow(sg));
ste = gmap_table_walk(sg, raddr, 1); /* get segment pointer */
@@ -1358,9 +1356,10 @@ static void gmap_unshadow_pgt(struct gmap *sg, unsigned long raddr)
__gmap_unshadow_pgt(sg, raddr, __va(pgt));
/* Free page table */
page = phys_to_page(pgt);
- list_del(&page->lru);
- page->_pt_s390_gaddr = 0;
- page_table_free_pgste(page);
+
+ ptdesc = page_ptdesc(page);
+ list_del(&ptdesc->pt_list);
+ page_table_free_pgste(ptdesc_page(ptdesc));
}
/**
@@ -1374,9 +1373,10 @@ static void gmap_unshadow_pgt(struct gmap *sg, unsigned long raddr)
static void __gmap_unshadow_sgt(struct gmap *sg, unsigned long raddr,
unsigned long *sgt)
{
- struct page *page;
phys_addr_t pgt;
int i;
+ struct page *page;
+ struct ptdesc *ptdesc;
BUG_ON(!gmap_is_shadow(sg));
for (i = 0; i < _CRST_ENTRIES; i++, raddr += _SEGMENT_SIZE) {
@@ -1387,9 +1387,10 @@ static void __gmap_unshadow_sgt(struct gmap *sg, unsigned long raddr,
__gmap_unshadow_pgt(sg, raddr, __va(pgt));
/* Free page table */
page = phys_to_page(pgt);
- list_del(&page->lru);
- page->_pt_s390_gaddr = 0;
- page_table_free_pgste(page);
+
+ ptdesc = page_ptdesc(page);
+ list_del(&ptdesc->pt_list);
+ page_table_free_pgste(ptdesc_page(ptdesc));
}
}
@@ -1405,6 +1406,7 @@ static void gmap_unshadow_sgt(struct gmap *sg, unsigned long raddr)
unsigned long r3o, *r3e;
phys_addr_t sgt;
struct page *page;
+ struct ptdesc *ptdesc;
BUG_ON(!gmap_is_shadow(sg));
r3e = gmap_table_walk(sg, raddr, 2); /* get region-3 pointer */
@@ -1418,9 +1420,10 @@ static void gmap_unshadow_sgt(struct gmap *sg, unsigned long raddr)
__gmap_unshadow_sgt(sg, raddr, __va(sgt));
/* Free segment table */
page = phys_to_page(sgt);
- list_del(&page->lru);
- page->_pt_s390_gaddr = 0;
- __free_pages(page, CRST_ALLOC_ORDER);
+
+ ptdesc = page_ptdesc(page);
+ list_del(&ptdesc->pt_list);
+ pagetable_free(ptdesc);
}
/**
@@ -1434,9 +1437,10 @@ static void gmap_unshadow_sgt(struct gmap *sg, unsigned long raddr)
static void __gmap_unshadow_r3t(struct gmap *sg, unsigned long raddr,
unsigned long *r3t)
{
- struct page *page;
phys_addr_t sgt;
int i;
+ struct page *page;
+ struct ptdesc *ptdesc;
BUG_ON(!gmap_is_shadow(sg));
for (i = 0; i < _CRST_ENTRIES; i++, raddr += _REGION3_SIZE) {
@@ -1447,9 +1451,10 @@ static void __gmap_unshadow_r3t(struct gmap *sg, unsigned long raddr,
__gmap_unshadow_sgt(sg, raddr, __va(sgt));
/* Free segment table */
page = phys_to_page(sgt);
- list_del(&page->lru);
- page->_pt_s390_gaddr = 0;
- __free_pages(page, CRST_ALLOC_ORDER);
+
+ ptdesc = page_ptdesc(page);
+ list_del(&ptdesc->pt_list);
+ pagetable_free(ptdesc);
}
}
@@ -1465,6 +1470,7 @@ static void gmap_unshadow_r3t(struct gmap *sg, unsigned long raddr)
unsigned long r2o, *r2e;
phys_addr_t r3t;
struct page *page;
+ struct ptdesc *ptdesc;
BUG_ON(!gmap_is_shadow(sg));
r2e = gmap_table_walk(sg, raddr, 3); /* get region-2 pointer */
@@ -1478,9 +1484,10 @@ static void gmap_unshadow_r3t(struct gmap *sg, unsigned long raddr)
__gmap_unshadow_r3t(sg, raddr, __va(r3t));
/* Free region 3 table */
page = phys_to_page(r3t);
- list_del(&page->lru);
- page->_pt_s390_gaddr = 0;
- __free_pages(page, CRST_ALLOC_ORDER);
+
+ ptdesc = page_ptdesc(page);
+ list_del(&ptdesc->pt_list);
+ pagetable_free(ptdesc);
}
/**
@@ -1495,8 +1502,9 @@ static void __gmap_unshadow_r2t(struct gmap *sg, unsigned long raddr,
unsigned long *r2t)
{
phys_addr_t r3t;
- struct page *page;
int i;
+ struct page *page;
+ struct ptdesc *ptdesc;
BUG_ON(!gmap_is_shadow(sg));
for (i = 0; i < _CRST_ENTRIES; i++, raddr += _REGION2_SIZE) {
@@ -1507,9 +1515,10 @@ static void __gmap_unshadow_r2t(struct gmap *sg, unsigned long raddr,
__gmap_unshadow_r3t(sg, raddr, __va(r3t));
/* Free region 3 table */
page = phys_to_page(r3t);
- list_del(&page->lru);
- page->_pt_s390_gaddr = 0;
- __free_pages(page, CRST_ALLOC_ORDER);
+
+ ptdesc = page_ptdesc(page);
+ list_del(&ptdesc->pt_list);
+ pagetable_free(ptdesc);
}
}
@@ -1525,6 +1534,7 @@ static void gmap_unshadow_r2t(struct gmap *sg, unsigned long raddr)
unsigned long r1o, *r1e;
struct page *page;
phys_addr_t r2t;
+ struct ptdesc *ptdesc;
BUG_ON(!gmap_is_shadow(sg));
r1e = gmap_table_walk(sg, raddr, 4); /* get region-1 pointer */
@@ -1538,9 +1548,10 @@ static void gmap_unshadow_r2t(struct gmap *sg, unsigned long raddr)
__gmap_unshadow_r2t(sg, raddr, __va(r2t));
/* Free region 2 table */
page = phys_to_page(r2t);
- list_del(&page->lru);
- page->_pt_s390_gaddr = 0;
- __free_pages(page, CRST_ALLOC_ORDER);
+
+ ptdesc = page_ptdesc(page);
+ list_del(&ptdesc->pt_list);
+ pagetable_free(ptdesc);
}
/**
@@ -1558,6 +1569,7 @@ static void __gmap_unshadow_r1t(struct gmap *sg, unsigned long raddr,
struct page *page;
phys_addr_t r2t;
int i;
+ struct ptdesc *ptdesc;
BUG_ON(!gmap_is_shadow(sg));
asce = __pa(r1t) | _ASCE_TYPE_REGION1;
@@ -1571,9 +1583,10 @@ static void __gmap_unshadow_r1t(struct gmap *sg, unsigned long raddr,
r1t[i] = _REGION1_ENTRY_EMPTY;
/* Free region 2 table */
page = phys_to_page(r2t);
- list_del(&page->lru);
- page->_pt_s390_gaddr = 0;
- __free_pages(page, CRST_ALLOC_ORDER);
+
+ ptdesc = page_ptdesc(page);
+ list_del(&ptdesc->pt_list);
+ pagetable_free(ptdesc);
}
}
@@ -1770,18 +1783,18 @@ int gmap_shadow_r2t(struct gmap *sg, unsigned long saddr, unsigned long r2t,
unsigned long raddr, origin, offset, len;
unsigned long *table;
phys_addr_t s_r2t;
- struct page *page;
+ struct ptdesc *ptdesc;
int rc;
BUG_ON(!gmap_is_shadow(sg));
/* Allocate a shadow region second table */
- page = alloc_pages(GFP_KERNEL_ACCOUNT, CRST_ALLOC_ORDER);
- if (!page)
+ ptdesc = pagetable_alloc(GFP_KERNEL_ACCOUNT, CRST_ALLOC_ORDER);
+ if (!ptdesc)
return -ENOMEM;
- page->_pt_s390_gaddr = r2t & _REGION_ENTRY_ORIGIN;
+ ptdesc->_pt_s390_gaddr = r2t & _REGION_ENTRY_ORIGIN;
if (fake)
- page->_pt_s390_gaddr |= GMAP_SHADOW_FAKE_TABLE;
- s_r2t = page_to_phys(page);
+ ptdesc->_pt_s390_gaddr |= GMAP_SHADOW_FAKE_TABLE;
+ s_r2t = page_to_phys(ptdesc_page(ptdesc));
/* Install shadow region second table */
spin_lock(&sg->guest_table_lock);
table = gmap_table_walk(sg, saddr, 4); /* get region-1 pointer */
@@ -1802,7 +1815,7 @@ int gmap_shadow_r2t(struct gmap *sg, unsigned long saddr, unsigned long r2t,
_REGION_ENTRY_TYPE_R1 | _REGION_ENTRY_INVALID;
if (sg->edat_level >= 1)
*table |= (r2t & _REGION_ENTRY_PROTECT);
- list_add(&page->lru, &sg->crst_list);
+ list_add(&ptdesc->pt_list, &sg->crst_list);
if (fake) {
/* nothing to protect for fake tables */
*table &= ~_REGION_ENTRY_INVALID;
@@ -1830,8 +1843,7 @@ int gmap_shadow_r2t(struct gmap *sg, unsigned long saddr, unsigned long r2t,
return rc;
out_free:
spin_unlock(&sg->guest_table_lock);
- page->_pt_s390_gaddr = 0;
- __free_pages(page, CRST_ALLOC_ORDER);
+ pagetable_free(ptdesc);
return rc;
}
EXPORT_SYMBOL_GPL(gmap_shadow_r2t);
@@ -1855,18 +1867,18 @@ int gmap_shadow_r3t(struct gmap *sg, unsigned long saddr, unsigned long r3t,
unsigned long raddr, origin, offset, len;
unsigned long *table;
phys_addr_t s_r3t;
- struct page *page;
+ struct ptdesc *ptdesc;
int rc;
BUG_ON(!gmap_is_shadow(sg));
/* Allocate a shadow region second table */
- page = alloc_pages(GFP_KERNEL_ACCOUNT, CRST_ALLOC_ORDER);
- if (!page)
+ ptdesc = pagetable_alloc(GFP_KERNEL_ACCOUNT, CRST_ALLOC_ORDER);
+ if (!ptdesc)
return -ENOMEM;
- page->_pt_s390_gaddr = r3t & _REGION_ENTRY_ORIGIN;
+ ptdesc->_pt_s390_gaddr = r3t & _REGION_ENTRY_ORIGIN;
if (fake)
- page->_pt_s390_gaddr |= GMAP_SHADOW_FAKE_TABLE;
- s_r3t = page_to_phys(page);
+ ptdesc->_pt_s390_gaddr |= GMAP_SHADOW_FAKE_TABLE;
+ s_r3t = page_to_phys(ptdesc_page(ptdesc));
/* Install shadow region second table */
spin_lock(&sg->guest_table_lock);
table = gmap_table_walk(sg, saddr, 3); /* get region-2 pointer */
@@ -1887,7 +1899,7 @@ int gmap_shadow_r3t(struct gmap *sg, unsigned long saddr, unsigned long r3t,
_REGION_ENTRY_TYPE_R2 | _REGION_ENTRY_INVALID;
if (sg->edat_level >= 1)
*table |= (r3t & _REGION_ENTRY_PROTECT);
- list_add(&page->lru, &sg->crst_list);
+ list_add(&ptdesc->pt_list, &sg->crst_list);
if (fake) {
/* nothing to protect for fake tables */
*table &= ~_REGION_ENTRY_INVALID;
@@ -1915,8 +1927,7 @@ int gmap_shadow_r3t(struct gmap *sg, unsigned long saddr, unsigned long r3t,
return rc;
out_free:
spin_unlock(&sg->guest_table_lock);
- page->_pt_s390_gaddr = 0;
- __free_pages(page, CRST_ALLOC_ORDER);
+ pagetable_free(ptdesc);
return rc;
}
EXPORT_SYMBOL_GPL(gmap_shadow_r3t);
@@ -1940,18 +1951,18 @@ int gmap_shadow_sgt(struct gmap *sg, unsigned long saddr, unsigned long sgt,
unsigned long raddr, origin, offset, len;
unsigned long *table;
phys_addr_t s_sgt;
- struct page *page;
+ struct ptdesc *ptdesc;
int rc;
BUG_ON(!gmap_is_shadow(sg) || (sgt & _REGION3_ENTRY_LARGE));
/* Allocate a shadow segment table */
- page = alloc_pages(GFP_KERNEL_ACCOUNT, CRST_ALLOC_ORDER);
- if (!page)
+ ptdesc = pagetable_alloc(GFP_KERNEL_ACCOUNT, CRST_ALLOC_ORDER);
+ if (!ptdesc)
return -ENOMEM;
- page->_pt_s390_gaddr = sgt & _REGION_ENTRY_ORIGIN;
+ ptdesc->_pt_s390_gaddr = sgt & _REGION_ENTRY_ORIGIN;
if (fake)
- page->_pt_s390_gaddr |= GMAP_SHADOW_FAKE_TABLE;
- s_sgt = page_to_phys(page);
+ ptdesc->_pt_s390_gaddr |= GMAP_SHADOW_FAKE_TABLE;
+ s_sgt = page_to_phys(ptdesc_page(ptdesc));
/* Install shadow region second table */
spin_lock(&sg->guest_table_lock);
table = gmap_table_walk(sg, saddr, 2); /* get region-3 pointer */
@@ -1972,7 +1983,7 @@ int gmap_shadow_sgt(struct gmap *sg, unsigned long saddr, unsigned long sgt,
_REGION_ENTRY_TYPE_R3 | _REGION_ENTRY_INVALID;
if (sg->edat_level >= 1)
*table |= sgt & _REGION_ENTRY_PROTECT;
- list_add(&page->lru, &sg->crst_list);
+ list_add(&ptdesc->pt_list, &sg->crst_list);
if (fake) {
/* nothing to protect for fake tables */
*table &= ~_REGION_ENTRY_INVALID;
@@ -2000,8 +2011,7 @@ int gmap_shadow_sgt(struct gmap *sg, unsigned long saddr, unsigned long sgt,
return rc;
out_free:
spin_unlock(&sg->guest_table_lock);
- page->_pt_s390_gaddr = 0;
- __free_pages(page, CRST_ALLOC_ORDER);
+ pagetable_free(ptdesc);
return rc;
}
EXPORT_SYMBOL_GPL(gmap_shadow_sgt);
@@ -2024,8 +2034,9 @@ int gmap_shadow_pgt_lookup(struct gmap *sg, unsigned long saddr,
int *fake)
{
unsigned long *table;
- struct page *page;
int rc;
+ struct page *page;
+ struct ptdesc *ptdesc;
BUG_ON(!gmap_is_shadow(sg));
spin_lock(&sg->guest_table_lock);
@@ -2033,9 +2044,10 @@ int gmap_shadow_pgt_lookup(struct gmap *sg, unsigned long saddr,
if (table && !(*table & _SEGMENT_ENTRY_INVALID)) {
/* Shadow page tables are full pages (pte+pgste) */
page = pfn_to_page(*table >> PAGE_SHIFT);
- *pgt = page->_pt_s390_gaddr & ~GMAP_SHADOW_FAKE_TABLE;
+ ptdesc = page_ptdesc(page);
+ *pgt = ptdesc->_pt_s390_gaddr & ~GMAP_SHADOW_FAKE_TABLE;
*dat_protection = !!(*table & _SEGMENT_ENTRY_PROTECT);
- *fake = !!(page->_pt_s390_gaddr & GMAP_SHADOW_FAKE_TABLE);
+ *fake = !!(ptdesc->_pt_s390_gaddr & GMAP_SHADOW_FAKE_TABLE);
rc = 0;
} else {
rc = -EAGAIN;
@@ -2064,19 +2076,19 @@ int gmap_shadow_pgt(struct gmap *sg, unsigned long saddr, unsigned long pgt,
{
unsigned long raddr, origin;
unsigned long *table;
- struct page *page;
+ struct ptdesc *ptdesc;
phys_addr_t s_pgt;
int rc;
BUG_ON(!gmap_is_shadow(sg) || (pgt & _SEGMENT_ENTRY_LARGE));
/* Allocate a shadow page table */
- page = page_table_alloc_pgste(sg->mm);
- if (!page)
+ ptdesc = page_ptdesc(page_table_alloc_pgste(sg->mm));
+ if (!ptdesc)
return -ENOMEM;
- page->_pt_s390_gaddr = pgt & _SEGMENT_ENTRY_ORIGIN;
+ ptdesc->_pt_s390_gaddr = pgt & _SEGMENT_ENTRY_ORIGIN;
if (fake)
- page->_pt_s390_gaddr |= GMAP_SHADOW_FAKE_TABLE;
- s_pgt = page_to_phys(page);
+ ptdesc->_pt_s390_gaddr |= GMAP_SHADOW_FAKE_TABLE;
+ s_pgt = page_to_phys(ptdesc_page(ptdesc));
/* Install shadow page table */
spin_lock(&sg->guest_table_lock);
table = gmap_table_walk(sg, saddr, 1); /* get segment pointer */
@@ -2094,7 +2106,7 @@ int gmap_shadow_pgt(struct gmap *sg, unsigned long saddr, unsigned long pgt,
/* mark as invalid as long as the parent table is not protected */
*table = (unsigned long) s_pgt | _SEGMENT_ENTRY |
(pgt & _SEGMENT_ENTRY_PROTECT) | _SEGMENT_ENTRY_INVALID;
- list_add(&page->lru, &sg->pt_list);
+ list_add(&ptdesc->pt_list, &sg->pt_list);
if (fake) {
/* nothing to protect for fake tables */
*table &= ~_SEGMENT_ENTRY_INVALID;
@@ -2120,8 +2132,7 @@ int gmap_shadow_pgt(struct gmap *sg, unsigned long saddr, unsigned long pgt,
return rc;
out_free:
spin_unlock(&sg->guest_table_lock);
- page->_pt_s390_gaddr = 0;
- page_table_free_pgste(page);
+ page_table_free_pgste(ptdesc_page(ptdesc));
return rc;
}
@@ -2821,11 +2832,11 @@ EXPORT_SYMBOL_GPL(__s390_uv_destroy_range);
*/
void s390_unlist_old_asce(struct gmap *gmap)
{
- struct page *old;
+ struct ptdesc *old;
- old = virt_to_page(gmap->table);
+ old = virt_to_ptdesc(gmap->table);
spin_lock(&gmap->guest_table_lock);
- list_del(&old->lru);
+ list_del(&old->pt_list);
/*
* Sometimes the topmost page might need to be "removed" multiple
* times, for example if the VM is rebooted into secure mode several
@@ -2840,7 +2851,7 @@ void s390_unlist_old_asce(struct gmap *gmap)
* pointers, so list_del can work (and do nothing) without
* dereferencing stale or invalid pointers.
*/
- INIT_LIST_HEAD(&old->lru);
+ INIT_LIST_HEAD(&old->pt_list);
spin_unlock(&gmap->guest_table_lock);
}
EXPORT_SYMBOL_GPL(s390_unlist_old_asce);
@@ -2861,7 +2872,7 @@ EXPORT_SYMBOL_GPL(s390_unlist_old_asce);
int s390_replace_asce(struct gmap *gmap)
{
unsigned long asce;
- struct page *page;
+ struct ptdesc *ptdesc;
void *table;
s390_unlist_old_asce(gmap);
@@ -2870,10 +2881,10 @@ int s390_replace_asce(struct gmap *gmap)
if ((gmap->asce & _ASCE_TYPE_MASK) == _ASCE_TYPE_SEGMENT)
return -EINVAL;
- page = alloc_pages(GFP_KERNEL_ACCOUNT, CRST_ALLOC_ORDER);
- if (!page)
+ ptdesc = pagetable_alloc(GFP_KERNEL_ACCOUNT, CRST_ALLOC_ORDER);
+ if (!ptdesc)
return -ENOMEM;
- table = page_to_virt(page);
+ table = ptdesc_to_virt(ptdesc);
memcpy(table, gmap->table, 1UL << (CRST_ALLOC_ORDER + PAGE_SHIFT));
/*
@@ -2882,7 +2893,7 @@ int s390_replace_asce(struct gmap *gmap)
* it will be freed when the VM is torn down.
*/
spin_lock(&gmap->guest_table_lock);
- list_add(&page->lru, &gmap->crst_list);
+ list_add(&ptdesc->pt_list, &gmap->crst_list);
spin_unlock(&gmap->guest_table_lock);
/* Set new table origin while preserving existing ASCE control bits */
diff --git a/include/linux/mm.h b/include/linux/mm.h
index 356e79984cf9..0e4d5f6d10e5 100644
--- a/include/linux/mm.h
+++ b/include/linux/mm.h
@@ -2792,6 +2792,9 @@ static inline void pagetable_free(struct ptdesc *pt)
{
struct page *page = ptdesc_page(pt);
+ /* set page->mapping to NULL since s390 gmap may have used it */
+ pt->_pt_s390_gaddr = 0;
+
__free_pages(page, compound_order(page));
}
--
2.40.1
More information about the linux-arm-kernel
mailing list