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Secure guests need to share the DTL buffers with the hypervisor. To that end, use a kmem_cache constructor which converts the underlying buddy allocated SLUB cache pages into shared memory. Signed-off-by: Anshuman Khandual <khandual@linux.vnet.ibm.com> Signed-off-by: Thiago Jung Bauermann <bauerman@linux.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/20190820021326.6884-10-bauerman@linux.ibm.com
32 lines
569 B
C
32 lines
569 B
C
/* SPDX-License-Identifier: GPL-2.0+ */
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/*
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* SVM helper functions
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*
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* Copyright 2018 Anshuman Khandual, IBM Corporation.
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*/
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#ifndef _ASM_POWERPC_SVM_H
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#define _ASM_POWERPC_SVM_H
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#ifdef CONFIG_PPC_SVM
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static inline bool is_secure_guest(void)
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{
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return mfmsr() & MSR_S;
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}
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void dtl_cache_ctor(void *addr);
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#define get_dtl_cache_ctor() (is_secure_guest() ? dtl_cache_ctor : NULL)
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#else /* CONFIG_PPC_SVM */
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static inline bool is_secure_guest(void)
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{
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return false;
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}
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#define get_dtl_cache_ctor() NULL
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#endif /* CONFIG_PPC_SVM */
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#endif /* _ASM_POWERPC_SVM_H */
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