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-rw-r--r--target/i386/cpu.h2
1 files changed, 2 insertions, 0 deletions
diff --git a/target/i386/cpu.h b/target/i386/cpu.h
index 0f7ddbfeae..8f3747dd28 100644
--- a/target/i386/cpu.h
+++ b/target/i386/cpu.h
@@ -268,6 +268,8 @@ typedef enum X86Seg {
#define DR7_TYPE_IO_RW 0x2
#define DR7_TYPE_DATA_RW 0x3
+#define DR_RESERVED_MASK 0xffffffff00000000ULL
+
#define PG_PRESENT_BIT 0
#define PG_RW_BIT 1
#define PG_USER_BIT 2