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-rw-r--r--include/linux/sched.h23
1 files changed, 23 insertions, 0 deletions
diff --git a/include/linux/sched.h b/include/linux/sched.h
index 119823decc46..a4ab9daa387c 100644
--- a/include/linux/sched.h
+++ b/include/linux/sched.h
@@ -1344,6 +1344,25 @@ enum perf_event_task_context {
perf_nr_task_contexts,
};
+/* Track pages that require TLB flushes */
+struct tlbflush_unmap_batch {
+ /*
+ * Each bit set is a CPU that potentially has a TLB entry for one of
+ * the PFNs being flushed. See set_tlb_ubc_flush_pending().
+ */
+ struct cpumask cpumask;
+
+ /* True if any bit in cpumask is set */
+ bool flush_required;
+
+ /*
+ * If true then the PTE was dirty when unmapped. The entry must be
+ * flushed before IO is initiated or a stale TLB entry potentially
+ * allows an update without redirtying the page.
+ */
+ bool writable;
+};
+
struct task_struct {
volatile long state; /* -1 unrunnable, 0 runnable, >0 stopped */
void *stack;
@@ -1700,6 +1719,10 @@ struct task_struct {
unsigned long numa_pages_migrated;
#endif /* CONFIG_NUMA_BALANCING */
+#ifdef CONFIG_ARCH_WANT_BATCHED_UNMAP_TLB_FLUSH
+ struct tlbflush_unmap_batch tlb_ubc;
+#endif
+
struct rcu_head rcu;
/*