Messages in this thread | | | Date | Tue, 21 May 2019 07:15:07 +0200 | From | Christoph Hellwig <> | Subject | Re: [PATCH 11/12] powerpc/pseries/svm: Force SWIOTLB for secure guests |
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> diff --git a/arch/powerpc/include/asm/mem_encrypt.h b/arch/powerpc/include/asm/mem_encrypt.h > new file mode 100644 > index 000000000000..45d5e4d0e6e0 > --- /dev/null > +++ b/arch/powerpc/include/asm/mem_encrypt.h > @@ -0,0 +1,19 @@ > +/* SPDX-License-Identifier: GPL-2.0+ */ > +/* > + * SVM helper functions > + * > + * Copyright 2019 IBM Corporation > + */ > + > +#ifndef _ASM_POWERPC_MEM_ENCRYPT_H > +#define _ASM_POWERPC_MEM_ENCRYPT_H > + > +#define sme_me_mask 0ULL > + > +static inline bool sme_active(void) { return false; } > +static inline bool sev_active(void) { return false; } > + > +int set_memory_encrypted(unsigned long addr, int numpages); > +int set_memory_decrypted(unsigned long addr, int numpages); > + > +#endif /* _ASM_POWERPC_MEM_ENCRYPT_H */
S/390 seems to be adding a stub header just like this. Can you please clean up the Kconfig and generic headers bits for memory encryption so that we don't need all this boilerplate code?
> config PPC_SVM > bool "Secure virtual machine (SVM) support for POWER" > depends on PPC_PSERIES > + select SWIOTLB > + select ARCH_HAS_MEM_ENCRYPT > default n
n is the default default, no need to explictly specify it.
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