x86: mov to/from sreg can be encoded with a memory operand

Signed-off-by: Andrew Cooper <andrew.cooper3@citrix.com>

diff --git a/arch/x86/include/arch/lib.h b/arch/x86/include/arch/lib.h
index 00459021f99235875e0d9b68a34fca16fec9dcae..6bd0eb65e591cf6ab72195bd6192b18fc1119aa1 100644 (file)
--- a/arch/x86/include/arch/lib.h
+++ b/arch/x86/include/arch/lib.h
@@ -125,7 +125,7 @@ static inline unsigned int read_cs(void)
 {
     unsigned int cs;
 
-    asm volatile ("mov %%cs, %0" : "=r" (cs));
+    asm volatile ("mov %%cs, %0" : "=rm" (cs));
 
     return cs;
 }
@@ -134,7 +134,7 @@ static inline unsigned int read_ds(void)
 {
     unsigned int ds;
 
-    asm volatile ("mov %%ds, %0" : "=r" (ds));
+    asm volatile ("mov %%ds, %0" : "=rm" (ds));
 
     return ds;
 }
@@ -143,7 +143,7 @@ static inline unsigned int read_es(void)
 {
     unsigned int es;
 
-    asm volatile ("mov %%es, %0" : "=r" (es));
+    asm volatile ("mov %%es, %0" : "=rm" (es));
 
     return es;
 }
@@ -152,7 +152,7 @@ static inline unsigned int read_fs(void)
 {
     unsigned int fs;
 
-    asm volatile ("mov %%fs, %0" : "=r" (fs));
+    asm volatile ("mov %%fs, %0" : "=rm" (fs));
 
     return fs;
 }
@@ -161,7 +161,7 @@ static inline unsigned int read_gs(void)
 {
     unsigned int gs;
 
-    asm volatile ("mov %%gs, %0" : "=r" (gs));
+    asm volatile ("mov %%gs, %0" : "=rm" (gs));
 
     return gs;
 }
@@ -170,7 +170,7 @@ static inline unsigned int read_ss(void)
 {
     unsigned int ss;
 
-    asm volatile ("mov %%ss, %0" : "=r" (ss));
+    asm volatile ("mov %%ss, %0" : "=rm" (ss));
 
     return ss;
 }
@@ -188,27 +188,27 @@ static inline void write_cs(unsigned int cs)
 
 static inline void write_ds(unsigned int ds)
 {
-    asm volatile ("mov %0, %%ds" :: "r" (ds));
+    asm volatile ("mov %0, %%ds" :: "rm" (ds));
 }
 
 static inline void write_es(unsigned int es)
 {
-    asm volatile ("mov %0, %%es" :: "r" (es));
+    asm volatile ("mov %0, %%es" :: "rm" (es));
 }
 
 static inline void write_fs(unsigned int fs)
 {
-    asm volatile ("mov %0, %%fs" :: "r" (fs));
+    asm volatile ("mov %0, %%fs" :: "rm" (fs));
 }
 
 static inline void write_gs(unsigned int gs)
 {
-    asm volatile ("mov %0, %%gs" :: "r" (gs));
+    asm volatile ("mov %0, %%gs" :: "rm" (gs));
 }
 
 static inline void write_ss(unsigned int ss)
 {
-    asm volatile ("mov %0, %%ss" :: "r" (ss));
+    asm volatile ("mov %0, %%ss" :: "rm" (ss));
 }
 
 static inline unsigned long read_cr0(void)