cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
Log | Files | Refs | README | LICENSE | sfeed.txt

mm_types_task.h (2555B)

      1/* SPDX-License-Identifier: GPL-2.0 */
      2#ifndef _LINUX_MM_TYPES_TASK_H
      3#define _LINUX_MM_TYPES_TASK_H
      4
      5/*
      6 * Here are the definitions of the MM data types that are embedded in 'struct task_struct'.
      7 *
      8 * (These are defined separately to decouple sched.h from mm_types.h as much as possible.)
      9 */
     10
     11#include <linux/types.h>
     12#include <linux/threads.h>
     13#include <linux/atomic.h>
     14#include <linux/cpumask.h>
     15
     16#include <asm/page.h>
     17
     18#ifdef CONFIG_ARCH_WANT_BATCHED_UNMAP_TLB_FLUSH
     19#include <asm/tlbbatch.h>
     20#endif
     21
     22#define USE_SPLIT_PTE_PTLOCKS	(NR_CPUS >= CONFIG_SPLIT_PTLOCK_CPUS)
     23#define USE_SPLIT_PMD_PTLOCKS	(USE_SPLIT_PTE_PTLOCKS && \
     24		IS_ENABLED(CONFIG_ARCH_ENABLE_SPLIT_PMD_PTLOCK))
     25#define ALLOC_SPLIT_PTLOCKS	(SPINLOCK_SIZE > BITS_PER_LONG/8)
     26
     27/*
     28 * The per task VMA cache array:
     29 */
     30#define VMACACHE_BITS 2
     31#define VMACACHE_SIZE (1U << VMACACHE_BITS)
     32#define VMACACHE_MASK (VMACACHE_SIZE - 1)
     33
     34struct vmacache {
     35	u64 seqnum;
     36	struct vm_area_struct *vmas[VMACACHE_SIZE];
     37};
     38
     39/*
     40 * When updating this, please also update struct resident_page_types[] in
     41 * kernel/fork.c
     42 */
     43enum {
     44	MM_FILEPAGES,	/* Resident file mapping pages */
     45	MM_ANONPAGES,	/* Resident anonymous pages */
     46	MM_SWAPENTS,	/* Anonymous swap entries */
     47	MM_SHMEMPAGES,	/* Resident shared memory pages */
     48	NR_MM_COUNTERS
     49};
     50
     51#if USE_SPLIT_PTE_PTLOCKS && defined(CONFIG_MMU)
     52#define SPLIT_RSS_COUNTING
     53/* per-thread cached information, */
     54struct task_rss_stat {
     55	int events;	/* for synchronization threshold */
     56	int count[NR_MM_COUNTERS];
     57};
     58#endif /* USE_SPLIT_PTE_PTLOCKS */
     59
     60struct mm_rss_stat {
     61	atomic_long_t count[NR_MM_COUNTERS];
     62};
     63
     64struct page_frag {
     65	struct page *page;
     66#if (BITS_PER_LONG > 32) || (PAGE_SIZE >= 65536)
     67	__u32 offset;
     68	__u32 size;
     69#else
     70	__u16 offset;
     71	__u16 size;
     72#endif
     73};
     74
     75/* Track pages that require TLB flushes */
     76struct tlbflush_unmap_batch {
     77#ifdef CONFIG_ARCH_WANT_BATCHED_UNMAP_TLB_FLUSH
     78	/*
     79	 * The arch code makes the following promise: generic code can modify a
     80	 * PTE, then call arch_tlbbatch_add_mm() (which internally provides all
     81	 * needed barriers), then call arch_tlbbatch_flush(), and the entries
     82	 * will be flushed on all CPUs by the time that arch_tlbbatch_flush()
     83	 * returns.
     84	 */
     85	struct arch_tlbflush_unmap_batch arch;
     86
     87	/* True if a flush is needed. */
     88	bool flush_required;
     89
     90	/*
     91	 * If true then the PTE was dirty when unmapped. The entry must be
     92	 * flushed before IO is initiated or a stale TLB entry potentially
     93	 * allows an update without redirtying the page.
     94	 */
     95	bool writable;
     96#endif
     97};
     98
     99#endif /* _LINUX_MM_TYPES_TASK_H */