From be4d2f1a528610dd00f575f9700739f54c37f28b Mon Sep 17 00:00:00 2001 From: Hao Feng Date: Tue, 22 Apr 2025 09:44:25 +0800 Subject: [PATCH] =?UTF-8?q?Hygon=20Arch=20Sig:=20=E5=A2=9E=E5=8A=A0?= =?UTF-8?q?=E5=BC=82=E6=9E=84=E6=9C=BA=E5=AF=86=E8=AE=A1=E7=AE=97=E5=85=A8?= =?UTF-8?q?=E6=9C=BA=E5=AF=86=E6=A8=A1=E5=BC=8F=E7=9A=84=E5=8E=9F=E7=90=86?= =?UTF-8?q?=E4=BB=8B=E7=BB=8D?= MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit --- sig/Hygon Arch/assets/CSV/dcu_trans_enc.png | Bin 0 -> 18952 bytes ...00\346\234\257\344\273\213\347\273\215.md" | 55 ++++++++++++++++++ 2 files changed, 55 insertions(+) create mode 100755 sig/Hygon Arch/assets/CSV/dcu_trans_enc.png create mode 100644 "sig/Hygon 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z2d^}Nj;xBfd=f?{+_EiH>B#k3BDH<3@NoD6n=m=&rWa+sdC*$nQ=jJy({5U85x-jn zXC14k+Vjb8k&!>SpRSa0g&_RKDO@aS8Iq+5tp<%7L*>Lclgsy!5d~w@7-b_FH8H2x z2wd~?f=A9*$ZWf!DR(8fiB{RBtFaFiAM`1NXEthc3}v%Ko^|4}Xb2%77zF>H0D%10 iBj670|H|u}58*RqpJTu4ECu*bq9ms#`{jXw@BahB#0xe6 literal 0 HcmV?d00001 diff --git "a/sig/Hygon Arch/content/2-CSV\346\265\213\350\257\225\346\226\207\346\241\243/10-\346\212\200\346\234\257\344\273\213\347\273\215/5-\345\274\202\346\236\204\346\234\272\345\257\206\350\256\241\347\256\227\345\205\250\346\234\272\345\257\206\346\250\241\345\274\217\346\212\200\346\234\257\344\273\213\347\273\215.md" "b/sig/Hygon Arch/content/2-CSV\346\265\213\350\257\225\346\226\207\346\241\243/10-\346\212\200\346\234\257\344\273\213\347\273\215/5-\345\274\202\346\236\204\346\234\272\345\257\206\350\256\241\347\256\227\345\205\250\346\234\272\345\257\206\346\250\241\345\274\217\346\212\200\346\234\257\344\273\213\347\273\215.md" new file mode 100644 index 00000000..1e5fff3d --- /dev/null +++ "b/sig/Hygon Arch/content/2-CSV\346\265\213\350\257\225\346\226\207\346\241\243/10-\346\212\200\346\234\257\344\273\213\347\273\215/5-\345\274\202\346\236\204\346\234\272\345\257\206\350\256\241\347\256\227\345\205\250\346\234\272\345\257\206\346\250\241\345\274\217\346\212\200\346\234\257\344\273\213\347\273\215.md" @@ -0,0 +1,55 @@ +测试之前,请参考[2-1-安装CSV软件](https://openanolis.cn/sig/Hygon-Arch/doc/865622260278236994?lang=zh)准备软件环境。 + +## 系统原理介绍 + +在CSV虚拟机中运行AI训练、推理,可以保护用户数据和模型数据的安全性,但是仅仅使用CPU算力无法满足某些应用场景的性能要求。DCU卡作为PCIE设备可以直通给CSV虚拟机使用,提高CSV虚拟机的系统算力。由于PCIE设备无法解密CSV加密内存,不能直接把CSV加密内存发送给DCU卡处理。为了阻止攻击者窥探PCIE总线数据,也不能直接发送明文数据给DCU卡,需要采用传输加密技术保护CPU和DCU之间传输的数据。如下图的传输加密示意图中所示,数据从CPU传输到DCU、从DCU传输到CPU之前都会被加密,保护数据在传输过程中不会被窃取。 + +![](../../../assets/CSV/dcu_trans_enc.png) + +## 隔离显存 + +DCU卡上的显存分为普通显存和隔离显存,CSV虚拟机使用隔离显存存放模型数据和用户数据,主机无法读写隔离显存,保障DCU计算过程中的显存数据安全。 + +## 协商传输密钥 + +1. DCU的安全处理器固件在初始化时生成一对SM2公私钥对K1_pub和K1_priv。 +2. CSV虚拟机中的DCU软件栈在初始化时获取DCU安全处理器固件的K1公钥K1_pub。 +3. DCU软件栈随机产生一个SM4密钥K2作为传输密钥,使用K1_pub加密K2生成K2_enc,并将K2_enc发送给DCU安全处理器固件。 +4. DCU安全处理器固件使用私钥K1_priv解密K2_enc得到K2。 +5. DCU软件栈和安全处理器固件后续使用K2作为传输密钥加密数据。 + +## CPU传输数据给DCU + +1. CSV虚拟机中的DCU软件栈分配隔离显存,准备将CSV加密内存中的数据拷贝到隔离显存中。 +2. DCU软件栈将CSV加密数据使用传输密钥K2重新加密后,存放到共享内存中。 +3. DCU软件栈使用SDMA引擎将共享内存中的加密数据拷贝到共享显存中。 +4. DCU Compute Unit将共享显存中的加密数据使用传输密钥K2解密后,存放到隔离显存中。 + +## DCU传输数据给CPU + +1. CSV虚拟机中的DCU软件栈准备将隔离显存中的数据拷贝到CSV加密内存中。 +2. DCU Compute Unit使用传输密钥K2加密隔离显存中的数据,将加密后的数据存放到共享显存中。 +3. DCU软件栈使用SDMA引擎将共享显存中的加密数据拷贝到共享内存中。 +4. DCU软件栈将共享内存中的加密数据使用传输密钥K2解密后,存放到CSV加密内存中。 + +## DCU安全页表 + +DCU访问显存时使用虚拟地址,需要经过页表转换成物理地址,用户的机密数据保存在隔离显存中,一种可能的攻击是将指向隔离显存的页表项篡改为普通显存,为了阻止这种攻击需要对隔离显存的页表进行保护,将隔离显存的安全页表也存放在隔离显存中。 + +隔离显存的安全页表存放在隔离显存中,普通显存的页表存放在普通显存中,需要把隔离显存和普通显存的虚拟地址空间分开,保证隔离显存和普通显存不会共享同一张页表。 + +DCU驱动在管理隔离显存时,从隔离显存中预留一段区间用来存放安全页表,使用DCU安全处理器更新安全页表。 + +## DCU安全command queue + +DCU command queue中存放Compute Unit需要执行的DCU指令,一种可能的攻击是篡改command queue中的内容将隔离显存中的数据拷贝到共享显存,为了阻止这种攻击需要对command queue进行保护,将command queue存放在隔离显存中。 + +DCU驱动在管理command queue时,从隔离显存中分配空间用来存放command queue,使用DCU安全处理器更新command queue。 + +## 直通多张DCU卡 + +如果CSV虚拟机接入了多张DCU卡,除了CPU和DCU之间需要传输数据,DCU卡之间也需要传输数据,并且也需要对DCU卡之间传输的数据进行加密保护。 + +CSV虚拟机中的DCU软件栈和每张DCU卡之间都需要协商传输密钥,软件栈与第1张DCU卡之间协商一个SM4传输密钥K2,与其他DCU卡协商传输密钥时也使用K2。 + +DCU卡之间传输数据时,发送方的Compute Unit使用K2对数据进行加密,接收方的Compute Unit使用K2对数据进行解密。 \ No newline at end of file -- Gitee