mirror of https://github.com/Qortal/Brooklyn
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
69 lines
1.7 KiB
69 lines
1.7 KiB
/* SPDX-License-Identifier: GPL-2.0 */ |
|
#ifndef _ASM_X86_MMU_H |
|
#define _ASM_X86_MMU_H |
|
|
|
#include <linux/spinlock.h> |
|
#include <linux/rwsem.h> |
|
#include <linux/mutex.h> |
|
#include <linux/atomic.h> |
|
#include <linux/bits.h> |
|
|
|
/* Uprobes on this MM assume 32-bit code */ |
|
#define MM_CONTEXT_UPROBE_IA32 BIT(0) |
|
/* vsyscall page is accessible on this MM */ |
|
#define MM_CONTEXT_HAS_VSYSCALL BIT(1) |
|
|
|
/* |
|
* x86 has arch-specific MMU state beyond what lives in mm_struct. |
|
*/ |
|
typedef struct { |
|
/* |
|
* ctx_id uniquely identifies this mm_struct. A ctx_id will never |
|
* be reused, and zero is not a valid ctx_id. |
|
*/ |
|
u64 ctx_id; |
|
|
|
/* |
|
* Any code that needs to do any sort of TLB flushing for this |
|
* mm will first make its changes to the page tables, then |
|
* increment tlb_gen, then flush. This lets the low-level |
|
* flushing code keep track of what needs flushing. |
|
* |
|
* This is not used on Xen PV. |
|
*/ |
|
atomic64_t tlb_gen; |
|
|
|
#ifdef CONFIG_MODIFY_LDT_SYSCALL |
|
struct rw_semaphore ldt_usr_sem; |
|
struct ldt_struct *ldt; |
|
#endif |
|
|
|
#ifdef CONFIG_X86_64 |
|
unsigned short flags; |
|
#endif |
|
|
|
struct mutex lock; |
|
void __user *vdso; /* vdso base address */ |
|
const struct vdso_image *vdso_image; /* vdso image in use */ |
|
|
|
atomic_t perf_rdpmc_allowed; /* nonzero if rdpmc is allowed */ |
|
#ifdef CONFIG_X86_INTEL_MEMORY_PROTECTION_KEYS |
|
/* |
|
* One bit per protection key says whether userspace can |
|
* use it or not. protected by mmap_lock. |
|
*/ |
|
u16 pkey_allocation_map; |
|
s16 execute_only_pkey; |
|
#endif |
|
} mm_context_t; |
|
|
|
#define INIT_MM_CONTEXT(mm) \ |
|
.context = { \ |
|
.ctx_id = 1, \ |
|
.lock = __MUTEX_INITIALIZER(mm.context.lock), \ |
|
} |
|
|
|
void leave_mm(int cpu); |
|
#define leave_mm leave_mm |
|
|
|
#endif /* _ASM_X86_MMU_H */
|
|
|