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-rw-r--r--sys/amd64/include/pmap.h6
1 files changed, 3 insertions, 3 deletions
diff --git a/sys/amd64/include/pmap.h b/sys/amd64/include/pmap.h
index ef02ac1..c362aa6 100644
--- a/sys/amd64/include/pmap.h
+++ b/sys/amd64/include/pmap.h
@@ -114,10 +114,10 @@
*/
#define PML4PML4I (NPML4EPG/2) /* Index of recursive pml4 mapping */
-#define KPML4I (NPML4EPG-1)
-#define DMPML4I (KPML4I-1)
+#define KPML4I (NPML4EPG-1) /* Top 512GB for KVM */
+#define DMPML4I (KPML4I-1) /* Next 512GB down for direct map */
-#define KPDPI (NPDPEPG-1)
+#define KPDPI (NPDPEPG-1) /* kernbase at -1GB */
/*
* XXX doesn't really belong here I guess...
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