The operation ALLOCATE is unused. If we ever need it, it could be
reimplemented with INSERT.
Signed-off-by: Julien Grall <julien.gr...@arm.com>
Acked-by: Stefano Stabellini <sstabell...@kernel.org>
---
Changes in v6:
- Add Stefano's acked-by
Changes in v4:
- Patch added
---
xen/arch/arm/p2m.c | 67 ++---------------------------------------------
xen/include/asm-arm/p2m.h | 3 ---
2 files changed, 2 insertions(+), 68 deletions(-)
diff --git a/xen/arch/arm/p2m.c b/xen/arch/arm/p2m.c
index fcc4513..f11094e 100644
--- a/xen/arch/arm/p2m.c
+++ b/xen/arch/arm/p2m.c
@@ -547,7 +547,6 @@ static int p2m_mem_access_radix_set(struct p2m_domain *p2m,
unsigned long pfn,
enum p2m_operation {
INSERT,
- ALLOCATE,
REMOVE,
RELINQUISH,
CACHEFLUSH,
@@ -667,7 +666,6 @@ static int apply_one_level(struct domain *d,
{
const paddr_t level_size = level_sizes[level];
const paddr_t level_mask = level_masks[level];
- const paddr_t level_shift = level_shifts[level];
struct p2m_domain *p2m = &d->arch.p2m;
lpae_t pte;
@@ -678,58 +676,6 @@ static int apply_one_level(struct domain *d,
switch ( op )
{
- case ALLOCATE:
- ASSERT(level < 3 || !p2m_valid(orig_pte));
- ASSERT(*maddr == 0);
-
- if ( p2m_valid(orig_pte) )
- return P2M_ONE_DESCEND;
-
- if ( is_mapping_aligned(*addr, end_gpaddr, 0, level_size) &&
- /* We only create superpages when mem_access is not in use. */
- (level == 3 || (level < 3 && !p2m->mem_access_enabled)) )
- {
- struct page_info *page;
-
- page = alloc_domheap_pages(d, level_shift - PAGE_SHIFT, 0);
- if ( page )
- {
- rc = p2m_mem_access_radix_set(p2m, paddr_to_pfn(*addr), a);
- if ( rc < 0 )
- {
- free_domheap_page(page);
- return rc;
- }
-
- pte = mfn_to_p2m_entry(page_to_mfn(page), mattr, t, a);
- if ( level < 3 )
- pte.p2m.table = 0;
- p2m_write_pte(entry, pte, flush_cache);
- p2m->stats.mappings[level]++;
-
- *addr += level_size;
-
- return P2M_ONE_PROGRESS;
- }
- else if ( level == 3 )
- return -ENOMEM;
- }
-
- /* L3 is always suitably aligned for mapping (handled, above) */
- BUG_ON(level == 3);
-
- /*
- * If we get here then we failed to allocate a sufficiently
- * large contiguous region for this level (which can't be
- * L3) or mem_access is in use. Create a page table and
- * continue to descend so we try smaller allocations.
- */
- rc = p2m_create_table(d, entry, 0, flush_cache);
- if ( rc < 0 )
- return rc;
-
- return P2M_ONE_DESCEND;
-
case INSERT:
if ( is_mapping_aligned(*addr, end_gpaddr, *maddr, level_size) &&
/*
@@ -1169,7 +1115,7 @@ static int apply_p2m_changes(struct domain *d,
}
}
- if ( op == ALLOCATE || op == INSERT )
+ if ( op == INSERT )
{
p2m->max_mapped_gfn = max(p2m->max_mapped_gfn, egfn);
p2m->lowest_mapped_gfn = min(p2m->lowest_mapped_gfn, sgfn);
@@ -1197,7 +1143,7 @@ out:
spin_unlock(&p2m->lock);
- if ( rc < 0 && ( op == INSERT || op == ALLOCATE ) &&
+ if ( rc < 0 && ( op == INSERT ) &&
addr != start_gpaddr )
{
BUG_ON(addr == end_gpaddr);
@@ -1212,15 +1158,6 @@ out:
return rc;
}
-int p2m_populate_ram(struct domain *d,
- paddr_t start,
- paddr_t end)
-{
- return apply_p2m_changes(d, ALLOCATE, start, end,
- 0, MATTR_MEM, 0, p2m_ram_rw,
- d->arch.p2m.default_access);
-}
-
int map_regions_rw_cache(struct domain *d,
unsigned long start_gfn,
unsigned long nr,
diff --git a/xen/include/asm-arm/p2m.h b/xen/include/asm-arm/p2m.h
index 8a96e68..4752161 100644
--- a/xen/include/asm-arm/p2m.h
+++ b/xen/include/asm-arm/p2m.h
@@ -141,9 +141,6 @@ mfn_t p2m_lookup(struct domain *d, gfn_t gfn, p2m_type_t
*t);
/* Clean & invalidate caches corresponding to a region of guest address space
*/
int p2m_cache_flush(struct domain *d, gfn_t start, unsigned long nr);
-/* Setup p2m RAM mapping for domain d from start-end. */
-int p2m_populate_ram(struct domain *d, paddr_t start, paddr_t end);
-
int map_regions_rw_cache(struct domain *d,
unsigned long start_gfn,
unsigned long nr_mfns,
--
1.9.1
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