arch/powerpc/include/asm/svm.h

   1 /* SPDX-License-Identifier: GPL-2.0+ */
   2 /*
   3  * SVM helper functions
   4  *
   5  * Copyright 2018 Anshuman Khandual, IBM Corporation.
   6  */
   7
   8 #ifndef _ASM_POWERPC_SVM_H
   9 #define _ASM_POWERPC_SVM_H
  10
  11 #ifdef CONFIG_PPC_SVM
  12
  13 static inline bool is_secure_guest(void)
  14 {
  15         return mfmsr() & MSR_S;
  16 }
  17
  18 void __init svm_swiotlb_init(void);
  19
  20 void dtl_cache_ctor(void *addr);
  21 #define get_dtl_cache_ctor()    (is_secure_guest() ? dtl_cache_ctor : NULL)
  22
  23 #else /* CONFIG_PPC_SVM */
  24
  25 static inline bool is_secure_guest(void)
  26 {
  27         return false;
  28 }
  29
  30 static inline void svm_swiotlb_init(void) {}
  31
  32 #define get_dtl_cache_ctor() NULL
  33
  34 #endif /* CONFIG_PPC_SVM */
  35 #endif /* _ASM_POWERPC_SVM_H */