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 _ASM_X86_MMU_H
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  3) #define _ASM_X86_MMU_H
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  4) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  5) #include <linux/spinlock.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  6) #include <linux/rwsem.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  7) #include <linux/mutex.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  8) #include <linux/atomic.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  9) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11)  * x86 has arch-specific MMU state beyond what lives in mm_struct.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) typedef struct {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) 	/*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) 	 * ctx_id uniquely identifies this mm_struct.  A ctx_id will never
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) 	 * be reused, and zero is not a valid ctx_id.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) 	 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) 	u64 ctx_id;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) 	/*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) 	 * Any code that needs to do any sort of TLB flushing for this
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) 	 * mm will first make its changes to the page tables, then
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) 	 * increment tlb_gen, then flush.  This lets the low-level
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) 	 * flushing code keep track of what needs flushing.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) 	 *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) 	 * This is not used on Xen PV.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) 	 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) 	atomic64_t tlb_gen;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) #ifdef CONFIG_MODIFY_LDT_SYSCALL
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) 	struct rw_semaphore	ldt_usr_sem;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) 	struct ldt_struct	*ldt;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) #ifdef CONFIG_X86_64
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) 	/* True if mm supports a task running in 32 bit compatibility mode. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) 	unsigned short ia32_compat;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) 	struct mutex lock;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) 	void __user *vdso;			/* vdso base address */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) 	const struct vdso_image *vdso_image;	/* vdso image in use */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) 	atomic_t perf_rdpmc_allowed;	/* nonzero if rdpmc is allowed */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) #ifdef CONFIG_X86_INTEL_MEMORY_PROTECTION_KEYS
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) 	/*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) 	 * One bit per protection key says whether userspace can
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) 	 * use it or not.  protected by mmap_lock.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) 	 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) 	u16 pkey_allocation_map;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) 	s16 execute_only_pkey;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) } mm_context_t;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) #define INIT_MM_CONTEXT(mm)						\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) 	.context = {							\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) 		.ctx_id = 1,						\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) 		.lock = __MUTEX_INITIALIZER(mm.context.lock),		\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) void leave_mm(int cpu);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) #define leave_mm leave_mm
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) #endif /* _ASM_X86_MMU_H */