fix: MMU竞态问题修复

背景：同一个进程的多个线程读写同一个PTE时，由于PTE无保护，存在竞态问题。
方案：新增spinlock保护PTE，包括大锁跟小锁。大锁：一个进程只有一个spinlock锁，多个线程
读写PTE时竞争一把锁，锁的内存占用小，但系统性能降低；小锁：每个页表持有一把spinlock，
由于锁是page结构体的一个字段，内存消耗较大，但是相对大锁性能较优。系统默认使用大锁,用
户可根据具体需要配置使用大锁还是小锁。

close #I2WARC

Signed-off-by: Haryslee <lihao189@huawei.com>
Change-Id: I5612eeac1f65507160035eae16af61f285182eda

kernel/base/include/los_vm_map.h

@@ -39,6 +39,7 @@
 
 #include "los_typedef.h"
 #include "los_arch_mmu.h"
+#include "los_mux.h"
 #include "los_rbtree.h"
 #include "los_vm_syscall.h"
 #include "los_vm_zone.h"

kernel/base/include/los_vm_page.h

@@ -36,6 +36,7 @@
 #include "los_bitmap.h"
 #include "los_list.h"
 #include "los_atomic.h"
+#include "los_spinlock.h"
 
 #ifdef __cplusplus
 #if __cplusplus
@@ -51,6 +52,9 @@ typedef struct VmPage {
     UINT8               order;       /**< vm page in which order list */
     UINT8               segID;       /**< the segment id of vm page */
     UINT16              nPages;      /**< the vm page is used for kernel heap */
+#ifdef LOSCFG_PAGE_TABLE_FINE_LOCK
+    SPIN_LOCK_S         lock;        /**< lock for page table entry */
+#endif
 } LosVmPage;
 
 extern LosVmPage *g_vmPageArray;

kernel/base/include/los_vm_phys.h

@@ -102,6 +102,7 @@ LosVmPage *OsVmVaddrToPage(VOID *ptr);
 VOID OsPhysSharePageCopy(PADDR_T oldPaddr, PADDR_T *newPaddr, LosVmPage *newPage);
 VOID OsVmPhysPagesFreeContiguous(LosVmPage *page, size_t nPages);
 LosVmPage *OsVmPhysToPage(paddr_t pa, UINT8 segID);
+LosVmPage *OsVmPaddrToPage(paddr_t paddr);
 
 LosVmPage *LOS_PhysPageAlloc(VOID);
 VOID LOS_PhysPageFree(LosVmPage *page);
@@ -110,6 +111,7 @@ size_t LOS_PhysPagesFree(LOS_DL_LIST *list);
 VOID *LOS_PhysPagesAllocContiguous(size_t nPages);
 VOID LOS_PhysPagesFreeContiguous(VOID *ptr, size_t nPages);
 VADDR_T *LOS_PaddrToKVaddr(PADDR_T paddr);
+PADDR_T OsKVaddrToPaddr(VADDR_T kvaddr);
 
 #ifdef __cplusplus
 #if __cplusplus

kernel/base/vm/los_vm_page.c

@@ -50,6 +50,9 @@ STATIC VOID OsVmPageInit(LosVmPage *page, paddr_t pa, UINT8 segID)
     page->segID = segID;
     page->order = VM_LIST_ORDER_MAX;
     page->nPages = 0;
+#ifdef LOSCFG_PAGE_TABLE_FINE_LOCK
+    LOS_SpinInit(&page->lock);
+#endif
 }
 
 STATIC INLINE VOID OsVmPageOrderListInit(LosVmPage *page, size_t nPages)

kernel/base/vm/los_vm_phys.c

@@ -220,6 +220,20 @@ LosVmPage *OsVmPhysToPage(paddr_t pa, UINT8 segID)
     return (seg->pageBase + (offset >> PAGE_SHIFT));
 }
 
+LosVmPage *OsVmPaddrToPage(paddr_t paddr)
+{
+    INT32 segID;
+    LosVmPage *vmPage = NULL;
+
+    for (segID = 0; segID < g_vmPhysSegNum; segID++) {
+        vmPage = OsVmPhysToPage(paddr, segID);
+        if (vmPage != NULL) {
+            return vmPage;
+        }
+    }
+    return NULL;
+}
+
 VOID *OsVmPageToVaddr(LosVmPage *page)
 {
     VADDR_T vaddr;
@@ -444,11 +458,23 @@ VOID LOS_PhysPagesFreeContiguous(VOID *ptr, size_t nPages)
     LOS_SpinUnlockRestore(&seg->freeListLock, intSave);
 }
 
+PADDR_T OsKVaddrToPaddr(VADDR_T kvaddr)
+{
+    if (kvaddr == 0) {
+        return 0;
+    }
+    return (kvaddr - KERNEL_ASPACE_BASE + SYS_MEM_BASE);
+}
+
 VADDR_T *LOS_PaddrToKVaddr(PADDR_T paddr)
 {
     struct VmPhysSeg *seg = NULL;
     UINT32 segID;
 
+    if (paddr == 0) {
+        return NULL;
+    }
+
     for (segID = 0; segID < g_vmPhysSegNum; segID++) {
         seg = &g_vmPhysSeg[segID];
         if ((paddr >= seg->start) && (paddr < (seg->start + seg->size))) {