1 /* SPDX-License-Identifier: GPL-2.0 */
5 #include <linux/spinlock.h>
6 #include <linux/mutex.h>
7 #include <linux/atomic.h>
10 * x86 has arch-specific MMU state beyond what lives in mm_struct.
14 * ctx_id uniquely identifies this mm_struct. A ctx_id will never
15 * be reused, and zero is not a valid ctx_id.
20 * Any code that needs to do any sort of TLB flushing for this
21 * mm will first make its changes to the page tables, then
22 * increment tlb_gen, then flush. This lets the low-level
23 * flushing code keep track of what needs flushing.
25 * This is not used on Xen PV.
29 #ifdef CONFIG_MODIFY_LDT_SYSCALL
30 struct ldt_struct *ldt;
34 /* True if mm supports a task running in 32 bit compatibility mode. */
35 unsigned short ia32_compat;
39 void __user *vdso; /* vdso base address */
40 const struct vdso_image *vdso_image; /* vdso image in use */
42 atomic_t perf_rdpmc_allowed; /* nonzero if rdpmc is allowed */
43 #ifdef CONFIG_X86_INTEL_MEMORY_PROTECTION_KEYS
45 * One bit per protection key says whether userspace can
46 * use it or not. protected by mmap_sem.
48 u16 pkey_allocation_map;
49 s16 execute_only_pkey;
51 #ifdef CONFIG_X86_INTEL_MPX
52 /* address of the bounds directory */
57 #define INIT_MM_CONTEXT(mm) \
62 void leave_mm(int cpu);
64 #endif /* _ASM_X86_MMU_H */