1 files changed, 29 insertions, 5 deletions

diff --git a/include/asm-x86_64/system.h b/include/asm-x86_64/system.h
index 6313d33a0686..02175aa1d16a 100644
--- a/include/asm-x86_64/system.h
+++ b/include/asm-x86_64/system.h
@@ -75,19 +75,31 @@ static inline unsigned long read_cr0(void)
         unsigned long cr0;
         asm volatile("movq %%cr0,%0" : "=r" (cr0));
         return cr0;
-} 
+}
 
 static inline void write_cr0(unsigned long val) 
 { 
         asm volatile("movq %0,%%cr0" :: "r" (val));
-} 
+}
+
+static inline unsigned long read_cr2(void)
+{
+        unsigned long cr2;
+        asm("movq %%cr2,%0" : "=r" (cr2));
+        return cr2;
+}
+
+static inline void write_cr2(unsigned long val)
+{
+        asm volatile("movq %0,%%cr2" :: "r" (val));
+}
 
 static inline unsigned long read_cr3(void)
 { 
         unsigned long cr3;
         asm("movq %%cr3,%0" : "=r" (cr3));
         return cr3;
-} 
+}
 
 static inline void write_cr3(unsigned long val)
 {
@@ -99,12 +111,24 @@ static inline unsigned long read_cr4(void)
         unsigned long cr4;
         asm("movq %%cr4,%0" : "=r" (cr4));
         return cr4;
-} 
+}
 
 static inline void write_cr4(unsigned long val)
 { 
         asm volatile("movq %0,%%cr4" :: "r" (val) : "memory");
-} 
+}
+
+static inline unsigned long read_cr8(void)
+{
+        unsigned long cr8;
+        asm("movq %%cr8,%0" : "=r" (cr8));
+        return cr8;
+}
+
+static inline void write_cr8(unsigned long val)
+{
+        asm volatile("movq %0,%%cr8" :: "r" (val) : "memory");
+}
 
 #define stts() write_cr0(8 | read_cr0())