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43656f774a
Move gmap_shadow_pgt_lookup() from mm/gmap.c into kvm/gaccess.c . Reviewed-by: Steffen Eiden <seiden@linux.ibm.com> Reviewed-by: Janosch Frank <frankja@linux.ibm.com> Reviewed-by: Christoph Schlameuss <schlameuss@linux.ibm.com> Link: https://lore.kernel.org/r/20250123144627.312456-13-imbrenda@linux.ibm.com Signed-off-by: Claudio Imbrenda <imbrenda@linux.ibm.com> Message-ID: <20250123144627.312456-13-imbrenda@linux.ibm.com>
39 lines
1.3 KiB
C
39 lines
1.3 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* KVM guest address space mapping code
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*
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* Copyright IBM Corp. 2007, 2016, 2025
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* Author(s): Martin Schwidefsky <schwidefsky@de.ibm.com>
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* Claudio Imbrenda <imbrenda@linux.ibm.com>
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*/
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#ifndef ARCH_KVM_S390_GMAP_H
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#define ARCH_KVM_S390_GMAP_H
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#define GMAP_SHADOW_FAKE_TABLE 1ULL
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int gmap_make_secure(struct gmap *gmap, unsigned long gaddr, void *uvcb);
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int gmap_convert_to_secure(struct gmap *gmap, unsigned long gaddr);
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int gmap_destroy_page(struct gmap *gmap, unsigned long gaddr);
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struct gmap *gmap_shadow(struct gmap *parent, unsigned long asce, int edat_level);
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/**
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* gmap_shadow_valid - check if a shadow guest address space matches the
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* given properties and is still valid
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* @sg: pointer to the shadow guest address space structure
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* @asce: ASCE for which the shadow table is requested
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* @edat_level: edat level to be used for the shadow translation
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*
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* Returns 1 if the gmap shadow is still valid and matches the given
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* properties, the caller can continue using it. Returns 0 otherwise, the
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* caller has to request a new shadow gmap in this case.
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*
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*/
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static inline int gmap_shadow_valid(struct gmap *sg, unsigned long asce, int edat_level)
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{
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if (sg->removed)
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return 0;
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return sg->orig_asce == asce && sg->edat_level == edat_level;
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}
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#endif
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