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174cb82a57
Since commit d08d4e7cd6 ("s390/mm: use full 4KB page for 2KB PTE") always
4k page tables are allocated, however there is still some (now) obsolete
code left which deals with switching from 2k to 4k page tables for qemu/kvm
processes.
Reviewed-by: Alexander Gordeev <agordeev@linux.ibm.com>
Remove the not needed code.
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
45 lines
1.3 KiB
C
45 lines
1.3 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef __MMU_H
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#define __MMU_H
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#include <linux/cpumask.h>
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#include <linux/errno.h>
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#include <asm/asm-extable.h>
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typedef struct {
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spinlock_t lock;
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cpumask_t cpu_attach_mask;
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atomic_t flush_count;
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unsigned int flush_mm;
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struct list_head gmap_list;
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unsigned long gmap_asce;
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unsigned long asce;
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unsigned long asce_limit;
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unsigned long vdso_base;
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/* The mmu context belongs to a secure guest. */
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atomic_t protected_count;
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/*
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* The following bitfields need a down_write on the mm
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* semaphore when they are written to. As they are only
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* written once, they can be read without a lock.
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*/
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/* The mmu context uses extended page tables. */
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unsigned int has_pgste:1;
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/* The mmu context uses storage keys. */
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unsigned int uses_skeys:1;
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/* The mmu context uses CMM. */
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unsigned int uses_cmm:1;
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/*
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* The mmu context allows COW-sharing of memory pages (KSM, zeropage).
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* Note that COW-sharing during fork() is currently always allowed.
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*/
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unsigned int allow_cow_sharing:1;
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/* The gmaps associated with this context are allowed to use huge pages. */
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unsigned int allow_gmap_hpage_1m:1;
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} mm_context_t;
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#define INIT_MM_CONTEXT(name) \
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.context.lock = __SPIN_LOCK_UNLOCKED(name.context.lock), \
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.context.gmap_list = LIST_HEAD_INIT(name.context.gmap_list),
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#endif
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