Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  1) /* SPDX-License-Identifier: GPL-2.0 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  2) #ifndef __MMU_H
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  3) #define __MMU_H
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  4) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  5) #include <linux/cpumask.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  6) #include <linux/errno.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  7) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  8) typedef struct {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  9) 	spinlock_t lock;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) 	cpumask_t cpu_attach_mask;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) 	atomic_t flush_count;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) 	unsigned int flush_mm;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) 	struct list_head pgtable_list;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) 	struct list_head gmap_list;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) 	unsigned long gmap_asce;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) 	unsigned long asce;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) 	unsigned long asce_limit;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) 	unsigned long vdso_base;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) 	/* The mmu context belongs to a secure guest. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) 	atomic_t is_protected;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) 	/*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) 	 * The following bitfields need a down_write on the mm
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) 	 * semaphore when they are written to. As they are only
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) 	 * written once, they can be read without a lock.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) 	 *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) 	 * The mmu context allocates 4K page tables.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) 	 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) 	unsigned int alloc_pgste:1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) 	/* The mmu context uses extended page tables. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) 	unsigned int has_pgste:1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) 	/* The mmu context uses storage keys. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) 	unsigned int uses_skeys:1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) 	/* The mmu context uses CMM. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) 	unsigned int uses_cmm:1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) 	/* The gmaps associated with this context are allowed to use huge pages. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) 	unsigned int allow_gmap_hpage_1m:1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) } mm_context_t;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) #define INIT_MM_CONTEXT(name)						   \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) 	.context.lock =	__SPIN_LOCK_UNLOCKED(name.context.lock),	   \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) 	.context.pgtable_list = LIST_HEAD_INIT(name.context.pgtable_list), \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) 	.context.gmap_list = LIST_HEAD_INIT(name.context.gmap_list),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) static inline int tprot(unsigned long addr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) 	int rc = -EFAULT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) 	asm volatile(
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) 		"	tprot	0(%1),0\n"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) 		"0:	ipm	%0\n"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) 		"	srl	%0,28\n"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) 		"1:\n"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) 		EX_TABLE(0b,1b)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) 		: "+d" (rc) : "a" (addr) : "cc");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) 	return rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) #endif