mm/hotplug: invalid PFNs from pfn_to_online_page()

[mirror_ubuntu-bionic-kernel.git] / include / linux / vmw_vmci_defs.h

diff --git a/include/linux/vmw_vmci_defs.h b/include/linux/vmw_vmci_defs.h
index b724ef7005de6745bdd8856a8ab50d68bbef06ed..53c5e40a2a8f59f09c6f97d4731423478b24d980 100644 (file)
--- a/include/linux/vmw_vmci_defs.h
+++ b/include/linux/vmw_vmci_defs.h
@@ -68,9 +68,18 @@ enum {
 
 /*
  * A single VMCI device has an upper limit of 128MB on the amount of
- * memory that can be used for queue pairs.
+ * memory that can be used for queue pairs. Since each queue pair
+ * consists of at least two pages, the memory limit also dictates the
+ * number of queue pairs a guest can create.
  */
 #define VMCI_MAX_GUEST_QP_MEMORY (128 * 1024 * 1024)
+#define VMCI_MAX_GUEST_QP_COUNT  (VMCI_MAX_GUEST_QP_MEMORY / PAGE_SIZE / 2)
+
+/*
+ * There can be at most PAGE_SIZE doorbells since there is one doorbell
+ * per byte in the doorbell bitmap page.
+ */
+#define VMCI_MAX_GUEST_DOORBELL_COUNT PAGE_SIZE
 
 /*
  * Queues with pre-mapped data pages must be small, so that we don't pin