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58 lines
1.5 KiB
58 lines
1.5 KiB
/* 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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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 pgtable_list; |
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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 is_protected; |
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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 allocates 4K page tables. |
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*/ |
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unsigned int alloc_pgste:1; |
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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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/* 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.pgtable_list = LIST_HEAD_INIT(name.context.pgtable_list), \ |
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.context.gmap_list = LIST_HEAD_INIT(name.context.gmap_list), |
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static inline int tprot(unsigned long addr) |
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{ |
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int rc = -EFAULT; |
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asm volatile( |
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" tprot 0(%1),0\n" |
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"0: ipm %0\n" |
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" srl %0,28\n" |
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"1:\n" |
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EX_TABLE(0b,1b) |
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: "+d" (rc) : "a" (addr) : "cc"); |
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return rc; |
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} |
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#endif
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