x86: puts read and write cr8 into pv_cpu_ops

This patch adds room for read and write_cr8 functions back in
pv_cpu_ops struct

Signed-off-by: Glauber de Oliveira Costa <gcosta@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

1 files changed, 15 insertions, 0 deletions

diff --git a/include/asm-x86/paravirt.h b/include/asm-x86/paravirt.h
index c56b17a5eba0..73547acbbbf5 100644
--- a/include/asm-x86/paravirt.h
+++ b/include/asm-x86/paravirt.h
@@ -101,6 +101,11 @@ struct pv_cpu_ops {
         unsigned long (*read_cr4)(void);
         void (*write_cr4)(unsigned long);
 
+#ifdef CONFIG_X86_64
+        unsigned long (*read_cr8)(void);
+        void (*write_cr8)(unsigned long);
+#endif
+
         /* Segment descriptor handling */
         void (*load_tr_desc)(void);
         void (*load_gdt)(const struct desc_ptr *);
@@ -614,6 +619,16 @@ static inline void write_cr4(unsigned long x)
         PVOP_VCALL1(pv_cpu_ops.write_cr4, x);
 }
 
+static inline unsigned long read_cr8(void)
+{
+        return PVOP_CALL0(unsigned long, pv_cpu_ops.read_cr8);
+}
+
+static inline void write_cr8(unsigned long x)
+{
+        PVOP_VCALL1(pv_cpu_ops.write_cr8, x);
+}
+
 static inline void raw_safe_halt(void)
 {
         PVOP_VCALL0(pv_irq_ops.safe_halt);