1 files changed, 13 insertions, 3 deletions

diff --git a/include/asm-x86/processor.h b/include/asm-x86/processor.h
index 6e26c7c717a2..e6bf92ddeb21 100644
--- a/include/asm-x86/processor.h
+++ b/include/asm-x86/processor.h
@@ -354,7 +354,7 @@ struct i387_soft_struct {
         u32                     entry_eip;
 };
 
-union i387_union {
+union thread_xstate {
         struct i387_fsave_struct        fsave;
         struct i387_fxsave_struct       fxsave;
         struct i387_soft_struct         soft;
@@ -365,6 +365,9 @@ DECLARE_PER_CPU(struct orig_ist, orig_ist);
 #endif
 
 extern void print_cpu_info(struct cpuinfo_x86 *);
+extern unsigned int xstate_size;
+extern void free_thread_xstate(struct task_struct *);
+extern struct kmem_cache *task_xstate_cachep;
 extern void init_scattered_cpuid_features(struct cpuinfo_x86 *c);
 extern unsigned int init_intel_cacheinfo(struct cpuinfo_x86 *c);
 extern unsigned short num_cache_leaves;
@@ -397,8 +400,8 @@ struct thread_struct {
         unsigned long           cr2;
         unsigned long           trap_no;
         unsigned long           error_code;
-        /* Floating point info: */
-        union i387_union        i387 __attribute__((aligned(16)));;
+        /* floating point and extended processor state */
+        union thread_xstate     *xstate;
 #ifdef CONFIG_X86_32
         /* Virtual 86 mode info */
         struct vm86_struct __user *vm86_info;
@@ -918,4 +921,11 @@ extern void start_thread(struct pt_regs *regs, unsigned long new_ip,
 
 #define KSTK_EIP(task)          (task_pt_regs(task)->ip)
 
+/* Get/set a process' ability to use the timestamp counter instruction */
+#define GET_TSC_CTL(adr)        get_tsc_mode((adr))
+#define SET_TSC_CTL(val)        set_tsc_mode((val))
+
+extern int get_tsc_mode(unsigned long adr);
+extern int set_tsc_mode(unsigned int val);
+
 #endif