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c98175b791
Add gmap_helper_set_unused() to mark userspace ptes as unused. Core mm code will use that information to discard unused pages instead of attempting to swap them. Reviewed-by: Nico Boehr <nrb@linux.ibm.com> Tested-by: Nico Boehr <nrb@linux.ibm.com> Acked-by: Christoph Schlameuss <schlameuss@linux.ibm.com> Acked-by: Heiko Carstens <hca@linux.ibm.com> Signed-off-by: Claudio Imbrenda <imbrenda@linux.ibm.com>
17 lines
537 B
C
17 lines
537 B
C
/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* Helper functions for KVM guest address space mapping code
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*
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* Copyright IBM Corp. 2025
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*/
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#ifndef _ASM_S390_GMAP_HELPERS_H
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#define _ASM_S390_GMAP_HELPERS_H
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void gmap_helper_zap_one_page(struct mm_struct *mm, unsigned long vmaddr);
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void gmap_helper_discard(struct mm_struct *mm, unsigned long vmaddr, unsigned long end);
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int gmap_helper_disable_cow_sharing(void);
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void gmap_helper_try_set_pte_unused(struct mm_struct *mm, unsigned long vmaddr);
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#endif /* _ASM_S390_GMAP_HELPERS_H */
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