xref: /OK3568_Linux_fs/kernel/arch/powerpc/include/asm/svm.h (revision 4882a59341e53eb6f0b4789bf948001014eff981) 
1*4882a593Smuzhiyun /* SPDX-License-Identifier: GPL-2.0+ */
2*4882a593Smuzhiyun /*
3*4882a593Smuzhiyun  * SVM helper functions
4*4882a593Smuzhiyun  *
5*4882a593Smuzhiyun  * Copyright 2018 Anshuman Khandual, IBM Corporation.
6*4882a593Smuzhiyun  */
7*4882a593Smuzhiyun 
8*4882a593Smuzhiyun #ifndef _ASM_POWERPC_SVM_H
9*4882a593Smuzhiyun #define _ASM_POWERPC_SVM_H
10*4882a593Smuzhiyun 
11*4882a593Smuzhiyun #ifdef CONFIG_PPC_SVM
12*4882a593Smuzhiyun 
is_secure_guest(void)13*4882a593Smuzhiyun static inline bool is_secure_guest(void)
14*4882a593Smuzhiyun {
15*4882a593Smuzhiyun 	return mfmsr() & MSR_S;
16*4882a593Smuzhiyun }
17*4882a593Smuzhiyun 
18*4882a593Smuzhiyun void __init svm_swiotlb_init(void);
19*4882a593Smuzhiyun 
20*4882a593Smuzhiyun void dtl_cache_ctor(void *addr);
21*4882a593Smuzhiyun #define get_dtl_cache_ctor()	(is_secure_guest() ? dtl_cache_ctor : NULL)
22*4882a593Smuzhiyun 
23*4882a593Smuzhiyun #else /* CONFIG_PPC_SVM */
24*4882a593Smuzhiyun 
is_secure_guest(void)25*4882a593Smuzhiyun static inline bool is_secure_guest(void)
26*4882a593Smuzhiyun {
27*4882a593Smuzhiyun 	return false;
28*4882a593Smuzhiyun }
29*4882a593Smuzhiyun 
svm_swiotlb_init(void)30*4882a593Smuzhiyun static inline void svm_swiotlb_init(void) {}
31*4882a593Smuzhiyun 
32*4882a593Smuzhiyun #define get_dtl_cache_ctor() NULL
33*4882a593Smuzhiyun 
34*4882a593Smuzhiyun #endif /* CONFIG_PPC_SVM */
35*4882a593Smuzhiyun #endif /* _ASM_POWERPC_SVM_H */
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