Merge branch 'x86-boot-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git...

[cascardo/linux.git] / arch / x86 / include / asm / paravirt_types.h

diff --git a/arch/x86/include/asm/paravirt_types.h b/arch/x86/include/asm/paravirt_types.h
index 7fedf24..7fa9e77 100644 (file)
--- a/arch/x86/include/asm/paravirt_types.h
+++ b/arch/x86/include/asm/paravirt_types.h
@@ -149,10 +149,16 @@ struct pv_cpu_ops {
        void (*cpuid)(unsigned int *eax, unsigned int *ebx,
                      unsigned int *ecx, unsigned int *edx);
 
-       /* MSR, PMC and TSR operations.
-          err = 0/-EFAULT.  wrmsr returns 0/-EFAULT. */
-       u64 (*read_msr)(unsigned int msr, int *err);
-       int (*write_msr)(unsigned int msr, unsigned low, unsigned high);
+       /* Unsafe MSR operations.  These will warn or panic on failure. */
+       u64 (*read_msr)(unsigned int msr);
+       void (*write_msr)(unsigned int msr, unsigned low, unsigned high);
+
+       /*
+        * Safe MSR operations.
+        * read sets err to 0 or -EIO.  write returns 0 or -EIO.
+        */
+       u64 (*read_msr_safe)(unsigned int msr, int *err);
+       int (*write_msr_safe)(unsigned int msr, unsigned low, unsigned high);
 
        u64 (*read_pmc)(int counter);