| /* SPDX-License-Identifier: GPL-2.0 */ |
| /* |
| * KVM guest address space mapping code |
| * |
| * Copyright IBM Corp. 2007, 2016, 2025 |
| * Author(s): Martin Schwidefsky <[email protected]> |
| * Claudio Imbrenda <[email protected]> |
| */ |
| |
| #ifndef ARCH_KVM_S390_GMAP_H |
| #define ARCH_KVM_S390_GMAP_H |
| |
| #define GMAP_SHADOW_FAKE_TABLE 1ULL |
| |
| int gmap_make_secure(struct gmap *gmap, unsigned long gaddr, void *uvcb); |
| int gmap_convert_to_secure(struct gmap *gmap, unsigned long gaddr); |
| int gmap_destroy_page(struct gmap *gmap, unsigned long gaddr); |
| struct gmap *gmap_shadow(struct gmap *parent, unsigned long asce, int edat_level); |
| |
| /** |
| * gmap_shadow_valid - check if a shadow guest address space matches the |
| * given properties and is still valid |
| * @sg: pointer to the shadow guest address space structure |
| * @asce: ASCE for which the shadow table is requested |
| * @edat_level: edat level to be used for the shadow translation |
| * |
| * Returns 1 if the gmap shadow is still valid and matches the given |
| * properties, the caller can continue using it. Returns 0 otherwise, the |
| * caller has to request a new shadow gmap in this case. |
| * |
| */ |
| static inline int gmap_shadow_valid(struct gmap *sg, unsigned long asce, int edat_level) |
| { |
| if (sg->removed) |
| return 0; |
| return sg->orig_asce == asce && sg->edat_level == edat_level; |
| } |
| |
| #endif |
