{"id":40040,"date":"2025-05-27T07:21:15","date_gmt":"2025-05-26T23:21:15","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/40040.html"},"modified":"2025-05-27T07:21:15","modified_gmt":"2025-05-26T23:21:15","slug":"%e9%b2%b2%e9%b9%8f%e6%9c%8d%e5%8a%a1%e5%99%a8pcie%e5%8a%a0%e9%80%9f%e5%8d%a1%e9%a9%b1%e5%8a%a8%e5%bc%82%e5%b8%b8%e9%97%ae%e9%a2%98","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/40040.html","title":{"rendered":"\u9cb2\u9e4f\u670d\u52a1\u5668PCIE\u52a0\u901f\u5361\u9a71\u52a8\u5f02\u5e38\u95ee\u9898"},"content":{"rendered":"

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u516c\u53f8\u7684\u67d0\u6b3ePCIE\u52a0\u901f\u5361\u4ea7\u54c1，\u4e00\u76f4\u5728\u5404\u7c7b\u57fa\u4e8ex86 CPU\u7684\u53f0\u5f0f\u673a\/\u670d\u52a1\u5668\u4e0a\u90fd\u8fd0\u884c\u826f\u597d；\u524d\u4e00\u6bb5\u65f6\u95f4，\u6709\u5ba2\u6237\u5c06\u8be5\u6b3e\u52a0\u901f\u5361\u4ea7\u54c1\u5e94\u7528\u5230\u4e86\u67d0\u6b3e\u9cb2\u9e4f\u670d\u52a1\u5668\u4e0a，\u5728\u8fdb\u884c\u6027\u80fd\u538b\u6d4b\u65f6\u51fa\u73b0\u5f02\u5e38，\u7cfb\u7edf\u65e5\u5fd7\u4e2d\u5927\u91cf\u51fa\u73b0\u8fd9\u4e24\u7c7b\u544a\u8b66\u4fe1\u606f：\u201clist_del corruption, ffffa02030de1868->next is LIST_POISON1 (dead000000000100)\u201d，\u201clist_add double add: new=ffffa02030de1868, prev=ffffa02030de1868, next=ffffa020306a0610\u201d\u3002<\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u8003\u8651\u5230\u8be5\u95ee\u9898\u53ea\u51fa\u73b0\u5728\u9cb2\u9e4f\u670d\u52a1\u5668，\u63a8\u6d4b\u548c\u9cb2\u9e4f\u5904\u7406\u5668\u7684\u7279\u5b9a\u5dee\u5f02\u6027（\u4e0ex86 CPU\u76f8\u6bd4）\u6709\u4e00\u5b9a\u5173\u7cfb，\u8fd9\u91cc\u7b14\u8005\u9996\u5148\u4ece\u9cb2\u9e4f\u670d\u52a1\u5668\u7684\u67b6\u6784\u5dee\u5f02\u6027\u7b49\u76f8\u5173\u80cc\u666f\u77e5\u8bc6\u5f00\u59cb\u9010\u6b65\u4ecb\u7ecd\u5b9a\u4f4d\u8fc7\u7a0b\u3002<\/p>\n

1 \u80cc\u666f\u77e5\u8bc6<\/h2>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u9cb2\u9e4f\u5904\u7406\u5668\u662f\u534e\u4e3a\u516c\u53f8\u81ea\u4e3b\u7814\u53d1\u7684\u4e00\u7cfb\u5217\u9ad8\u6027\u80fd\u670d\u52a1\u5668\u5904\u7406\u5668，\u57fa\u4e8eARM64\u67b6\u6784，\u7279\u522b\u662fARM v8\u67b6\u6784\u8fdb\u884c\u7814\u53d1，\u5e76\u5728\u6b64\u57fa\u7840\u4e0a\u8fdb\u884c\u4e86\u4f18\u5316\u548c\u521b\u65b0，\u4ee5\u6ee1\u8db3\u6570\u636e\u4e2d\u5fc3\u7b49\u9ad8\u6027\u80fd\u8ba1\u7b97\u573a\u666f\u7684\u9700\u6c42\u3002\u540c\u65f6，\u534e\u4e3a\u5728\u9cb2\u9e4f\u670d\u52a1\u5668\u4e0a\u5bf9 Linux \u5185\u6838\u7684\u7f16\u8bd1\u8fdb\u884c\u4e86\u4f18\u5316，\u4ee5\u786e\u4fdd\u5185\u6838\u80fd\u591f\u5145\u5206\u53d1\u6325\u9cb2\u9e4f\u5904\u7406\u5668\u7684\u6027\u80fd\u4f18\u52bf\u3002<\/p>\n

1.1 ARM64\u67b6\u6784\u4e0e\u5f31\u4e00\u81f4\u6027\u5185\u5b58\u6a21\u578b<\/h3>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0ARM64 \u67b6\u6784\u91c7\u7528\u4e86\u4e00\u79cd\u79f0\u4e3a\u201c\u5f31\u4e00\u81f4\u6027\u5185\u5b58\u6a21\u578b\u201d（Weakly-Ordered Memory Model）\u7684\u5185\u5b58\u6a21\u578b\u3002\u8fd9\u79cd\u6a21\u578b\u5141\u8bb8\u5904\u7406\u5668\u548c\u7f16\u8bd1\u5668\u5728\u4e00\u5b9a\u7a0b\u5ea6\u4e0a\u91cd\u65b0\u6392\u5e8f\u5185\u5b58\u64cd\u4f5c，\u4ee5\u63d0\u9ad8\u6027\u80fd\u3002<\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u5f31\u4e00\u81f4\u6027\u5185\u5b58\u6a21\u578b\u5141\u8bb8\u4ee5\u4e0b\u51e0\u79cd\u7c7b\u578b\u7684\u5185\u5b58\u64cd\u4f5c\u91cd\u65b0\u6392\u5e8f：<\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a01）\u5199-\u5199\u91cd\u6392\u5e8f：\u4e24\u4e2a\u5199\u64cd\u4f5c\u53ef\u4ee5\u91cd\u65b0\u6392\u5e8f\u3002<\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a02）\u8bfb-\u8bfb\u91cd\u6392\u5e8f：\u4e24\u4e2a\u8bfb\u64cd\u4f5c\u53ef\u4ee5\u91cd\u65b0\u6392\u5e8f\u3002<\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a03）\u5199-\u8bfb\u91cd\u6392\u5e8f：\u5199\u64cd\u4f5c\u53ef\u4ee5\u5728\u8bfb\u64cd\u4f5c\u4e4b\u524d\u6267\u884c，\u4f46\u8bfb\u64cd\u4f5c\u4e0d\u80fd\u5728\u5199\u64cd\u4f5c\u4e4b\u524d\u6267\u884c\u3002<\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u5728\u8fd9\u79cd\u60c5\u51b5\u4e0b，\u7a0b\u5e8f\u5458\u9700\u8981\u4f7f\u7528\u5185\u5b58\u5c4f\u969c（Memory Barriers）\u6765\u663e\u5f0f\u5730\u63a7\u5236\u5185\u5b58\u64cd\u4f5c\u7684\u987a\u5e8f，\u4ee5\u786e\u4fdd\u7a0b\u5e8f\u7684\u6b63\u786e\u6027\u3002 \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u8fdb\u4e00\u6b65\u9605\u8bfb\u53c2\u8003\u5efa\u8bae：<\/p>\n

\u300a\u5185\u5b58\u4e00\u81f4\u6027\u95ee\u9898\u2014\u5185\u5b58\u5c4f\u969c\u300b<\/p>\n

\n

1.2 \u7f16\u8bd1\u5668\u4f18\u5316\u5bfc\u81f4\u7684\u4e71\u5e8f\u8bbf\u95ee<\/h3>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u7f16\u8bd1\u5668\u5728\u4f18\u5316\u4ee3\u7801\u65f6，\u4e3a\u4e86\u63d0\u9ad8\u6267\u884c\u6548\u7387，\u53ef\u80fd\u4f1a\u5bf9\u6307\u4ee4\u8fdb\u884c\u91cd\u65b0\u6392\u5e8f\u3002\u8fd9\u79cd\u91cd\u6392\u5728\u4e0d\u6539\u53d8\u7a0b\u5e8f\u5355\u7ebf\u7a0b\u6267\u884c\u7ed3\u679c\u7684\u524d\u63d0\u4e0b，\u901a\u8fc7\u8c03\u6574\u6307\u4ee4\u987a\u5e8f\u6765\u66f4\u597d\u5730\u5229\u7528\u5904\u7406\u5668\u7684\u6d41\u6c34\u7ebf\u3001\u7f13\u5b58\u7b49\u8d44\u6e90\u3002\u7136\u800c，\u5728\u591a\u7ebf\u7a0b\u6216\u5e76\u53d1\u6267\u884c\u73af\u5883\u4e2d，\u8fd9\u79cd\u6307\u4ee4\u91cd\u6392\u53ef\u80fd\u4f1a\u5bfc\u81f4\u5185\u5b58\u8bbf\u95ee\u987a\u5e8f\u4e0e\u7a0b\u5e8f\u5458\u7684\u9884\u671f\u4e0d\u4e00\u81f4，\u4ece\u800c\u5f15\u53d1\u95ee\u9898\u3002<\/p>\n

  • \u6307\u4ee4\u91cd\u6392\u5e8f\u3002\u7f16\u8bd1\u5668\u4e3a\u4e86\u63d0\u9ad8\u6027\u80fd，\u53ef\u80fd\u4f1a\u5bf9\u6307\u4ee4\u8fdb\u884c\u91cd\u65b0\u6392\u5e8f\u3002\u8fd9\u79cd\u91cd\u6392\u5e8f\u53ef\u4ee5\u5728\u4e0d\u5f71\u54cd\u5355\u7ebf\u7a0b\u7a0b\u5e8f\u8bed\u4e49\u7684\u60c5\u51b5\u4e0b\u8fdb\u884c，\u4f46\u5728\u591a\u7ebf\u7a0b\u73af\u5883\u4e2d\u53ef\u80fd\u4f1a\u5bfc\u81f4\u95ee\u9898\u3002<\/li>\n
  • \u53d8\u91cf\u5bc4\u5b58\u5668\u5b58\u50a8\u3002\u7f16\u8bd1\u5668\u53ef\u80fd\u4f1a\u5c06\u67d0\u4e9b\u53d8\u91cf\u5b58\u50a8\u5728\u5bc4\u5b58\u5668\u4e2d，\u800c\u4e0d\u662f\u5185\u5b58\u4e2d\u3002\u8fd9\u53ef\u4ee5\u63d0\u9ad8\u6027\u80fd，\u4f46\u53ef\u80fd\u4f1a\u5bfc\u81f4\u5185\u5b58\u8bbf\u95ee\u7684\u987a\u5e8f\u53d1\u751f\u53d8\u5316\u3002<\/li>\n

    1.3 \u9cb2\u9e4f\u670d\u52a1\u5668linux\u5185\u6838\u7684\u7f16\u8bd1\u4f18\u5316\u63aa\u65bd<\/h3>\n

    \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u9cb2\u9e4f\u670d\u52a1\u5668\u7684linux\u5185\u6838\u5728\u7f16\u8bd1\u65f6，\u901a\u5e38\u4f1a\u8bbe\u7f6e\u8f83\u9ad8\u7684GCC\u7f16\u8bd1\u5668\u4f18\u5316\u7ea7\u522b，\u5982-O2\u6216-O3，\u4ee5\u63d0\u5347\u4ee3\u7801\u7684\u6267\u884c\u6548\u7387\u3002\u8fd9\u4e9b\u4f18\u5316\u7ea7\u522b\u4f1a\u5bf9\u4ee3\u7801\u8fdb\u884c\u66f4\u591a\u7684\u5206\u6790\u548c\u91cd\u6392，\u4ece\u800c\u751f\u6210\u66f4\u9ad8\u6548\u7684\u673a\u5668\u7801\u3002<\/p>\n

    \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u6b64\u5916，\u8fd8\u4f1a\u4f7f\u7528\u4e00\u4e9b\u7279\u5b9a\u7684\u7f16\u8bd1\u5668\u9009\u9879\u6765\u8fdb\u4e00\u6b65\u63d0\u5347\u4ee3\u7801\u7684\u6267\u884c\u6548\u7387，\u5982-fomit-frame-pointer\u3001-march\u3001-mtune\u7b49\u3002\u8fd9\u4e9b\u9009\u9879\u80fd\u591f\u9488\u5bf9\u7279\u5b9a\u7684\u5904\u7406\u5668\u67b6\u6784\u8fdb\u884c\u4f18\u5316，\u751f\u6210\u66f4\u9ad8\u6548\u7684\u673a\u5668\u7801\u3002<\/p>\n

    2 \u539f\u56e0\u5206\u6790<\/h2>\n

    2.1 \u7cfb\u7edf\u544a\u8b66\u65e5\u5fd7<\/h3>\n

    \u7cfb\u7edf\u538b\u6d4b\u4e2dmessage\u544a\u8b66\u65e5\u5fd7\u7247\u6bb5\u5982\u4e0b：<\/p>\n

    [2240.087542] list_del corruption, ffffa02030de1868->next is LIST_POISON1 (dead000000000100)<\/span><\/p>\n

    [2240.095779] WARNING: CPU: 25 PID: 2074 at\u00a0lib\/list_debug.c:47 __list_del_entry_valid+0x60\/0xc8<\/span><\/p>\n

    [2240.160279]CPU:25 \u00a0PID:2074 \u00a0Comm: \u00a0Kdump: loaded Tainted: G W OE \u00a04.19.90-0.240102.uos.aarch64 #1<\/p>\n

    [ 2240.171094] Hardware name: PowerLeader PR210K\/BC82AMDQ, BIOS 7.15 06\/20\/2024<\/p>\n

    [ 2240.178109] pstate: 40c00009 (nZcv daif +PAN +UAO)<\/p>\n

    [ 2240.182876] pc : __list_del_entry_valid+0x60\/0xc8<\/p>\n

    [ 2240.187558] lr : __list_del_entry_valid+0x60\/0xc8<\/p>\n

    [ 2240.192239] sp : ffffa020314f7cf0<\/p>\n

    … … … …(\u7701\u7565\u65e0\u5173\u4fe1\u606f)<\/p>\n

    [ 2240.274844] Call trace:<\/p>\n

    [ 2240.277281] \u00a0__list_del_entry_valid<\/span>+0x60\/0xc8<\/p>\n

    [ 2240.281619] \u00a0xxDataLinkGet<\/span>+0x74\/0x118 [xxdrv]（\u4ece\u7a7a\u95f2\u961f\u5217\u5206\u914d\u8d44\u6e90\u8282\u70b9<\/span>）<\/p>\n

    [ 2240.286130] \u00a0xx_InstMsgProc+0x98\/0x380 [xxdrv]<\/p>\n

    [ 2240.290642] \u00a0xx_rcv_msg+0xd4\/0x480 [xxdrv]<\/p>\n

    [ 2240.294894] \u00a0xx_pollTskProc<\/span>+0x798\/0x10d8 [xxdrv]<\/p>\n

    [ 2240.299575] \u00a0kthread+0x134\/0x138<\/p>\n

    [ 2240.302788] \u00a0ret_from_fork+0x10\/0x18<\/p>\n

    … … … …(\u7701\u7565\u65e0\u5173\u4fe1\u606f)<\/p>\n

    [2252.155899] list_add double add: new=ffffa02030de1868, prev=ffffa02030de1868, next=ffffa020306a0610<\/span>.<\/p>\n

    [2252.165001] WARNING: CPU: 25 PID: 2074 at\u00a0lib\/list_debug.c:31 __list_add_valid+0x9c\/0xa8<\/span><\/p>\n

    [ 2252.228981] CPU: 25 PID: 2074 Comm: Kdump: loaded Tainted: G W OE \u00a04.19.90-0.240102.uos.aarch64 #1<\/p>\n

    [ 2252.239798] Hardware name: PowerLeader PR210K\/BC82AMDQ, BIOS 7.15 06\/20\/2024<\/p>\n

    [ 2252.246813] pstate: 40c00009 (nZcv daif +PAN +UAO)<\/p>\n

    [ 2252.251580] pc : __list_add_valid+0x9c\/0xa8<\/p>\n

    [ 2252.255745] lr : __list_add_valid+0x9c\/0xa8<\/p>\n

    [ 2252.259909] sp : ffffa020314f7d00<\/p>\n

    .. … … …(\u7701\u7565\u65e0\u5173\u4fe1\u606f)<\/p>\n

    [ 2252.342512] Call trace:<\/p>\n

    [ 2252.344948] \u00a0__list_add_valid<\/span>+0x9c\/0xa8<\/p>\n

    [ 2252.348768] \u00a0xxDataLinkPut<\/span>+0x64\/0xb8 [xxdrv]（\u91ca\u653e\u8d44\u6e90\u8282\u70b9\u5230\u7a7a\u95f2\u961f\u5217<\/span>）<\/p>\n

    [ 2252.353194] \u00a0xxDataSemLnkPut+0x28\/0x48 [xxdrv]<\/p>\n

    [ 2252.357793] \u00a0xxDataSemLnkPutEx+0x70\/0x128 [xxdrv]<\/p>\n

    [ 2252.362650] \u00a0xx_pollTskProc<\/span>+0x31c\/0x10d8 [xxdrv]<\/p>\n

    [ 2252.367331] \u00a0kthread+0x134\/0x138<\/p>\n

    [ 2252.370546] \u00a0ret_from_fork+0x10\/0x18<\/p>\n

    … … … …(\u7701\u7565\u65e0\u5173\u4fe1\u606f)<\/p>\n

    2.2 \u95ee\u9898\u8c03\u7528\u6808\u5206\u6790<\/h3>\n

    \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u4ece\u7cfb\u7edf\u65e5\u5fd7\u770b，\u4e24\u7c7b\u5f02\u5e38\u544a\u8b66\u5747\u51fa\u73b0\u5728\u52a0\u901f\u5361\u9a71\u52a8xxdrv\u7684\u540c\u4e00\u8c03\u5ea6\u7ebf\u7a0bxx_pollTskProc\u4e2d，\u5176\u4e2d：<\/p>\n

    \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a01）\u8c03\u7528\u94fe1：xx_pollTskProc=>(…)xxDataLinkGet=>__list_del_entry_valid，\u5bf9\u5e94\u8c03\u5ea6\u7ebf\u7a0b\u7684\u52a0\u901f\u8ba1\u7b97\u8bf7\u6c42\u5165\u53e3\u548c（list\u961f\u5217）\u8d44\u6e90\u8282\u70b9\u5206\u914d\u6d41\u7a0b，\u201clist_del corruption, ffffa02030de1868->next is LIST_POISON1 (dead000000000100)\u201d\u544a\u8b66\u8868\u793a\u4ece\u8be5list\u961f\u5217\u5206\u914d\u7684\u8282\u70b9next\u503c\u5f02\u5e38\u4e3a\u7a7a，\u5373\u8be5\u8282\u70b9\u51fa\u73b0\u91cd\u590d\u5206\u914d\u95ee\u9898\u3002<\/p>\n

    \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a02）\u8c03\u7528\u94fe2：xx_pollTskProc=>(…)xxDataLinkPut=>__list_add_valid，\u5bf9\u5e94\u8c03\u5ea6\u7ebf\u7a0b\u7684\u52a0\u901f\u8ba1\u7b97\u7ed3\u679c\u54cd\u5e94\u548c（list\u961f\u5217）\u8d44\u6e90\u8282\u70b9\u91ca\u653e\u6d41\u7a0b，\u201clist_add double add: new=ffffa02030de1868, prev=ffffa02030de1868, next=ffffa020306a0610\u201d\u544a\u8b66\u8868\u793a\u91ca\u653e\u56de\u8be5list\u961f\u5217\u7684new\u8282\u70b9\u4e0e\u961f\u5217\u4e2d\u4e4b\u524d\u5df2\u7ecf\u91ca\u653e\u7684prev\u4e3a\u540c\u4e00\u8282\u70b9，\u5373\u51fa\u73b0\u8282\u70b9\u91cd\u590d\u91ca\u653e\u95ee\u9898\u3002<\/p>\n

    \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u8865\u5145\u8bf4\u660e：\u9a71\u52a8\u7a0b\u5e8f\u4e2d，\u8c03\u5ea6\u7ebf\u7a0bxx_pollTskProc\u4f7f\u7528\u540c\u4e00\u4e2alist\u961f\u5217\u6765\u7ba1\u7406（\u5206\u914d\/\u91ca\u653e）\u7528\u4e8e\u8bb0\u5f55\u52a0\u901f\u5361\u8ba1\u7b97\u8bf7\u6c42\/\u54cd\u5e94\u4e0a\u4e0b\u6587\u4fe1\u606f\u7684\u8282\u70b9\u8d44\u6e90，\u6bcf\u4e2a\u8d44\u6e90\u8282\u70b9\u4e0e\u52a0\u901f\u5361\u4e0a\u7684\u8ba1\u7b97\u8282\u70b9\u4e00\u4e00\u5bf9\u5e94，\u4e0a\u8ff01\/2\u7684\u8c03\u7528\u94fe\u544a\u8b66\u4fe1\u606f\u610f\u5473\u7740\u8be5list\u961f\u5217\u8d44\u6e90\u8282\u70b9\u7684\u5206\u914d\u4e0e\u91ca\u653e\u64cd\u4f5c\u8fc7\u7a0b\u4e2d\u51fa\u73b0\u4e86\u91cd\u590d\u5206\u914d\u548c\u91cd\u590d\u91ca\u653e\u5f02\u5e38\u95ee\u9898；\u7531\u4e8e\u8be5list\u961f\u5217\u7684\u8282\u70b9\u7ba1\u7406\u662f\u5728\u540c\u4e00\u4e2a\u8c03\u5ea6\u7ebf\u7a0b\u4e2d\u8fdb\u884c\u7ba1\u7406，\u4f3c\u4e4e\u4e0eCPU\u7684\u591a\u6838\u5fc3\u591a\u7ebf\u7a0b\u540c\u6b65\u8c03\u7528\u673a\u5236\u95ee\u9898\u65e0\u5173，\u95ee\u9898\u663e\u5f97\u975e\u5e38\u8d39\u89e3\u3002<\/p>\n

    \u00a0 \u00a0 \u00a0 \u00a0 \u8865\u5145\u53c2\u8003：linux\u5185\u6838\u6e90\u7801\u4e2d\u201c __list_add_valid\u201d\u548c\u201c__list_del_entry_valid\u201d\u51fd\u6570\u7684\u76f8\u5173\u4ee3\u7801\u7247\u6bb5:<\/p>\n

    \/*
    \n * Check that the data structures for the list manipulations are reasonably
    \n * valid. Failures here indicate memory corruption (and possibly an exploit
    \n * attempt).
    \n *\/<\/p>\n

    bool __list_add_valid(struct list_head *new, struct list_head *prev,
    \n struct list_head *next)
    \n{
    \nif (CHECK_DATA_CORRUPTION(prev == NULL,
    \n"list_add corruption. prev is NULL.\\\\n") ||
    \n CHECK_DATA_CORRUPTION(next == NULL,
    \n"list_add corruption. next is NULL.\\\\n") ||
    \n CHECK_DATA_CORRUPTION(next->prev != prev,
    \n"list_add corruption. next->prev should be prev (%px), but was %px. (next=%px).\\\\n",
    \nprev, next->prev, next) ||
    \n CHECK_DATA_CORRUPTION(prev->next != next,
    \n"list_add corruption. prev->next should be next (%px), but was %px. (prev=%px).\\\\n",
    \nnext, prev->next, prev) ||
    \n CHECK_DATA_CORRUPTION(new == prev || new == next,
    \n"list_add double add: new=%px, prev=%px, next=%px.\\\\n",
    \nnew, prev, next))
    \nreturn false;<\/p>\n

    return true;
    \n}
    \nEXPORT_SYMBOL(__list_add_valid);<\/p>\n

    bool __list_del_entry_valid(struct list_head *entry)
    \n{
    \nstruct list_head *prev, *next;<\/p>\n

    prev = entry->prev;
    \nnext = entry->next;<\/p>\n

    if (CHECK_DATA_CORRUPTION(next == NULL,
    \n"list_del corruption, %px->next is NULL\\\\n", entry) ||
    \n CHECK_DATA_CORRUPTION(prev == NULL,
    \n"list_del corruption, %px->prev is NULL\\\\n", entry) ||
    \n CHECK_DATA_CORRUPTION(next == LIST_POISON1,
    \n"list_del corruption, %px->next is LIST_POISON1 (%px)\\\\n",
    \nentry, LIST_POISON1) ||
    \n CHECK_DATA_CORRUPTION(prev == LIST_POISON2,
    \n"list_del corruption, %px->prev is LIST_POISON2 (%px)\\\\n",
    \nentry, LIST_POISON2) ||
    \n CHECK_DATA_CORRUPTION(prev->next != entry,
    \n"list_del corruption. prev->next should be %px, but was %px\\\\n",
    \nentry, prev->next) ||
    \n CHECK_DATA_CORRUPTION(next->prev != entry,
    \n"list_del corruption. next->prev should be %px, but was %px\\\\n",
    \nentry, next->prev))
    \nreturn false;<\/p>\n

    return true;<\/p>\n

    }
    \nEXPORT_SYMBOL(__list_del_entry_valid);<\/p>\n

    2.3\u539f\u56e0\u8ffd\u8e2a<\/h3>\n

    \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u4ece\u524d\u8ff02.2\u7684\u5f02\u5e38\u8c03\u7528\u6808\u5206\u6790\u6765\u770b，\u7531\u4e8e\u662f\u5728\u540c\u4e00\u4e2a\u8c03\u5ea6\u7ebf\u7a0b\u4e2d\u8fdb\u884c\u5bf9\u540c\u4e00list\u8d44\u6e90\u961f\u5217\u8fdb\u884c\u5206\u914d\u91ca\u653e\u7ba1\u7406，\u95ee\u9898\u5e94\u8be5\u4e0eCPU\u7684\u591a\u6838\u5fc3\u591a\u7ebf\u7a0b\u540c\u6b65\u8c03\u7528\u673a\u5236\u65e0\u5173；\u800c\u540c\u4e00\u9a71\u52a8\u7a0b\u5e8f\u5728x86\u7cfb\u7edf\u4e0a\u53c8\u80fd\u6b63\u5e38\u5de5\u4f5c，\u8868\u660e\u4ee3\u7801\u903b\u8f91\u4e5f\u95ee\u9898\u65e0\u5173\u3002<\/p>\n

    \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u4e8e\u662f，\u95ee\u9898\u5206\u6790\u7684\u91cd\u70b9\u5f00\u59cb\u843d\u5230\u9cb2\u9e4fCPU\u67b6\u6784\u7684\u5dee\u5f02\u6027\u4e0a，\u7279\u522b\u662f\u201c\u80cc\u666f\u77e5\u8bc6\u201d\u90e8\u5206\u63d0\u5230\u7684ARM64\u67b6\u6784\u7684\u5f31\u4e00\u81f4\u6027\u5185\u5b58\u673a\u5236\u548c\u5185\u6838\u7f16\u8bd1\u5668\u4f18\u5316\u53ef\u80fd\u5bfc\u81f4\u7684\u6307\u4ee4\u4e71\u5e8f\u6267\u884c\u95ee\u9898\u4e0a\u3002<\/p>\n

    \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u63a5\u7740，\u5f00\u59cb\u53cd\u590d\u5206\u6790\u4e0elist\u961f\u5217\u8d44\u6e90\u8282\u70b9\u64cd\u4f5c，\u7279\u522b\u662f\u9a71\u52a8\u4e2d\u4e0e\u52a0\u901f\u5361\u8ba1\u7b97\u8282\u70b9\u8fdb\u884c\u540c\u6b65\u8c03\u5ea6\u7684\u51fd\u6570\u4ee3\u7801，\u67e5\u770b\u662f\u5426\u5b58\u5728\u56e0\u6307\u4ee4\u4e71\u5e8f\u6267\u884c\u5bfc\u81f4\u8d44\u6e90\u8282\u70b9\u4e71\u5e8f\u7684\u95ee\u9898\u3002<\/p>\n

    \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u529f\u592b\u4e0d\u8d39\u6709\u5fc3\u4eba，\u5bf9\u7591\u4f3c\u53ef\u80fd\u4e71\u5e8f\u7684\u51fd\u6570\u4ee3\u7801\u8fdb\u884c\u7ecf\u8fc7\u591a\u6b21\u5c1d\u8bd5（\u5206\u6790\/\u4fee\u6539\/\u6d4b\u8bd5），\u5e76\u5bf9\u4fee\u8ba2\u540e\u7684\u4ee3\u7801\u8fdb\u884c\u957f\u65f6\u95f4\u538b\u6d4b\u9a8c\u8bc1，\u6700\u7ec8\u786e\u8ba4\u4e86\u95ee\u9898\u539f\u56e0\u3002<\/p>\n

    \n

    3 \u95ee\u9898\u5206\u6790\u4e0e\u4fee\u8ba2<\/h2>\n

    \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u8fd9\u91cc\u76f4\u63a5\u5206\u4eab\u95ee\u9898\u76f8\u5173\u70b9\u4ee3\u7801\u7247\u6bb5（\u7701\u53bb\u65e0\u5173\u7ec6\u8282）\u7684\u95ee\u9898\u5206\u6790\u548c\u4fee\u8ba2\u8fc7\u7a0b\u3002<\/p>\n

    3.1 \u52a0\u901f\u8ba1\u7b97\u8bf7\u6c42\u51fd\u6570xx_doMsgReq<\/h3>\n

    \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u539f\u56e0\u5206\u6790：xx_doMsgReq\u51fd\u6570\u7ba1\u7406\u8ba1\u7b97\u8bf7\u6c42\u8282\u70b9\u961f\u5217ring0，\u6bcf\u53d1\u9001\u4e00\u4e2a\u52a0\u901f\u8ba1\u7b97\u8bf7\u6c42\u62a5\u6587\u5230\u52a0\u901f\u5361，\u4f1a\u5bf9\u8be5\u8bf7\u6c42\u5faa\u73af\u961f\u5217ring0\u8fdb\u884c\u79fb\u4f4d（ring->tail<\/span>++），\u540c\u65f6\u540c\u6b65\u8bbe\u7f6e\u52a0\u901f\u5361\u7684\u5bf9\u5e94\u5bc4\u5b58\u5668（\u8c03\u7528tx_ring_start<\/span>），\u95ee\u9898\u5c31\u51fa\u5728ring0\u961f\u5217\u79fb\u4f4d\u6307\u4ee4\u4e0e\u52a0\u901f\u5361\u5bc4\u5b58\u5668\u64cd\u4f5c\u6307\u4ee4\u4e4b\u95f4（\u5728\u9cb2\u9e4fCPU\u4e0a）\u53ef\u80fd\u5b58\u5728\u4e71\u5e8f，\u4e00\u65e6\u51fa\u73b0\u4e71\u5e8f，\u9a71\u52a8\u5c42\u7684\u8d44\u6e90\u8282\u70b9\u4e0e\u52a0\u901f\u5361\u4e0a\u7684\u8ba1\u7b97\u8282\u70b9\u5c31\u4f1a\u51fa\u73b0\u9519\u4f4d，\u518d\u52a0\u4e0a\u53cc\u65b9\u7684\u5faa\u73af\u961f\u5217\u4f1a\u5468\u671f\u6027\u56de\u8f6c（\u00a0ring->block_num=>0），\u8bf7\u6c42\u8282\u70b9\u548c\u54cd\u5e94\u8282\u70b9（\u53c2\u89c12.3.2）\u5c31\u4f1a\u56e0\u961f\u5217\u9519\u4f4d\u800c\u51fa\u73b0\u8d44\u6e90\u8282\u70b9\u7684\u91cd\u590d\u8bfb\u53d6\u4e0e\u91ca\u653e，\u5bf9\u5e94\u51fa\u73b02.2\u90e8\u5206\u7684\u544a\u8b66\u4fe1\u606f\u3002<\/p>\n

    \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u4fee\u6b63\u65b9\u6cd5：\u5728\u4e0a\u8ff0\u53ef\u80fd\u51fa\u73b0\u4e71\u5e8f\u7684\u6307\u4ee4\u4e4b\u95f4\u589e\u52a0\u5185\u5b58\u5c4f\u853d\u6307\u4ee4（mb<\/span>），\u9632\u6b62\u7f16\u8bd1\u5668\/CPU\u7684\u4e71\u5e8f\u5e76\u884c\u4f18\u5316\/\u6267\u884c\u3002<\/p>\n

    int xx_doMsgReq(…)<\/p>\n

    {<\/span><\/p>\n

    \u00a0\u00a0\u00a0\u00a0.. … … …(\u7701\u7565\u65e0\u5173\u4ee3\u7801)<\/p>\n

    req = (void *)(ring->virt_addr +\u00a0ring->tail<\/span>\u00a0* ring->block_size);<\/p>\n

    .. … … …(\u7701\u7565\u65e0\u5173\u4ee3\u7801)<\/p>\n

    ring->tail<\/span>++; \/\/\u8bf7\u6c42\u5faa\u73af\u961f\u5217ring0<\/p>\n

    if(ring->tail<\/span>\u00a0>= ring->block_num) ring->tail<\/span>=0; \u00a0\u00a0<\/p>\n

    mb(); \/\/\u4fee\u8ba2：\u65b0\u589e<\/span>\u5185\u5b58\u5c4f\u853d\u6307\u4ee4<\/p>\n

    tx_ring_start(…, ring)<\/span>;<\/p>\n

    .. … … …(\u7701\u7565\u65e0\u5173\u4fe1\u606f)<\/p>\n

    }<\/span><\/p>\n

    \n

    int<\/span>\u00a0tx_ring_start<\/span>(…)<\/span><\/p>\n

    {<\/span><\/p>\n

    \u00a0\u00a0\u00a0\u00a0.. … … …(\u7701\u7565\u65e0\u5173\u4ee3\u7801)<\/p>\n

    RSP_REG_WRITE(…, ring->block_size * <\/span>ring->tail<\/span>);<\/span><\/p>\n

    .. … … …(\u7701\u7565\u65e0\u5173\u4ee3\u7801)<\/p>\n

    }<\/span><\/p>\n

    \n

    3.2 \u52a0\u901f\u5361\u8ba1\u7b97\u7ed3\u679c\u5904\u7406\u51fd\u6570xx_instan_read<\/h3>\n

    \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u539f\u56e0\u5206\u6790：xx_instan_read\u51fd\u6570\u4f1a\u5468\u671f\u6027\u5730\u68c0\u67e5\u548c\u8bfb\u53d6\u52a0\u901f\u5361\u7684\u8ba1\u7b97\u54cd\u5e94\u62a5\u6587\u961f\u5217ring1，\u4e00\u65e6\u8bfb\u5230\u67d0\u4e2a\u8ba1\u7b97\u54cd\u5e94\u7ed3\u679c，\u4f1a\u5bf9\u54cd\u5e94\u5faa\u73af\u961f\u5217ring1\u8fdb\u884c\u79fb\u4f4d（ring->head<\/span>++），\u540c\u65f6\u540c\u6b65\u8bbe\u7f6e\u52a0\u901f\u5361\u7684\u5bf9\u5e94\u5bc4\u5b58\u5668（\u8c03\u7528ring_head_reg），\u540c\u7406，\u4e00\u65e6ring1\u5faa\u73af\u961f\u5217\u79fb\u4f4d\u6307\u4ee4\u4e0e\u52a0\u901f\u5361\u5bc4\u5b58\u5668\u64cd\u4f5c\u7684\u6307\u4ee4\u4e4b\u95f4\u51fa\u73b0\u4e71\u5e8f，\u8bf7\u6c42\u8282\u70b9（\u53c2\u89c12.3.1）\u548c\u54cd\u5e94\u8282\u70b9\u5c31\u4f1a\u51fa\u73b0\u9519\u4f4d\u548c\u91cd\u590d\u8bfb\u53d6\u4e0e\u91ca\u653e，\u5bf9\u5e94\u51fa\u73b02.2\u90e8\u5206\u7684\u544a\u8b66\u4fe1\u606f\u3002<\/p>\n

    \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u4fee\u6b63\u65b9\u6cd5：\u7c7b\u4f3c3.1\u3002<\/p>\n

    int xx_instan_read(…)<\/p>\n

    {<\/p>\n

    .. … … …(\u7701\u7565\u65e0\u5173\u4ee3\u7801)<\/p>\n

    ring->head<\/span>++;\/\/\u54cd\u5e94\u5faa\u73af\u961f\u5217ring1<\/p>\n

    if(ring->head <\/span>>= ring->block_num) \u00a0ring->head<\/span>=0;<\/p>\n

    mb(); \/\/\u4fee\u8ba2：\u65b0\u589e<\/span>\u5185\u5b58\u5c4f\u853d\u6307\u4ee4<\/p>\n

    \n

    ring_head_reg(…, ring->block_size * ring->head<\/span>);<\/p>\n

    .. … … …(\u7701\u7565\u65e0\u5173\u4ee3\u7801)<\/p>\n

    }<\/p>\n

    \n

    4 \u95ee\u9898\u603b\u7ed3<\/h2>\n

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  • \u95ee\u9898\u7684\u51fa\u73b0\u4e0e\u9cb2\u9e4fCPU\u67b6\u6784\u7684\u5dee\u5f02\u6027\u5f3a\u76f8\u5173；<\/li>\n
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