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Diffstat (limited to 'arch/tile/mm/homecache.c')
-rw-r--r--arch/tile/mm/homecache.c38
1 files changed, 32 insertions, 6 deletions
diff --git a/arch/tile/mm/homecache.c b/arch/tile/mm/homecache.c
index d78df3a..cbe6f4f 100644
--- a/arch/tile/mm/homecache.c
+++ b/arch/tile/mm/homecache.c
@@ -179,23 +179,46 @@ void flush_remote(unsigned long cache_pfn, unsigned long cache_control,
panic("Unsafe to continue.");
}
+void flush_remote_page(struct page *page, int order)
+{
+ int i, pages = (1 << order);
+ for (i = 0; i < pages; ++i, ++page) {
+ void *p = kmap_atomic(page);
+ int hfh = 0;
+ int home = page_home(page);
+#if CHIP_HAS_CBOX_HOME_MAP()
+ if (home == PAGE_HOME_HASH)
+ hfh = 1;
+ else
+#endif
+ BUG_ON(home < 0 || home >= NR_CPUS);
+ finv_buffer_remote(p, PAGE_SIZE, hfh);
+ kunmap_atomic(p);
+ }
+}
+
void homecache_evict(const struct cpumask *mask)
{
flush_remote(0, HV_FLUSH_EVICT_L2, mask, 0, 0, 0, NULL, NULL, 0);
}
-/* Return a mask of the cpus whose caches currently own these pages. */
-static void homecache_mask(struct page *page, int pages,
- struct cpumask *home_mask)
+/*
+ * Return a mask of the cpus whose caches currently own these pages.
+ * The return value is whether the pages are all coherently cached
+ * (i.e. none are immutable, incoherent, or uncached).
+ */
+static int homecache_mask(struct page *page, int pages,
+ struct cpumask *home_mask)
{
int i;
+ int cached_coherently = 1;
cpumask_clear(home_mask);
for (i = 0; i < pages; ++i) {
int home = page_home(&page[i]);
if (home == PAGE_HOME_IMMUTABLE ||
home == PAGE_HOME_INCOHERENT) {
cpumask_copy(home_mask, cpu_possible_mask);
- return;
+ return 0;
}
#if CHIP_HAS_CBOX_HOME_MAP()
if (home == PAGE_HOME_HASH) {
@@ -203,11 +226,14 @@ static void homecache_mask(struct page *page, int pages,
continue;
}
#endif
- if (home == PAGE_HOME_UNCACHED)
+ if (home == PAGE_HOME_UNCACHED) {
+ cached_coherently = 0;
continue;
+ }
BUG_ON(home < 0 || home >= NR_CPUS);
cpumask_set_cpu(home, home_mask);
}
+ return cached_coherently;
}
/*
@@ -386,7 +412,7 @@ void homecache_change_page_home(struct page *page, int order, int home)
pte_t *ptep = virt_to_pte(NULL, kva);
pte_t pteval = *ptep;
BUG_ON(!pte_present(pteval) || pte_huge(pteval));
- *ptep = pte_set_home(pteval, home);
+ __set_pte(ptep, pte_set_home(pteval, home));
}
}