\u672c\u7bc7\u6587\u7ae0\u7ed9\u5927\u5bb6\u8c08\u8c08\u5947\u8ff9mu\u6846\u67b6\uff0c\u4ee5\u53ca\u6846\u67b6\u7ed3\u6784\u7528\u4ec0\u4e48\u7816\u5bf9\u5e94\u7684\u77e5\u8bc6\u70b9\uff0c\u6587\u7ae0\u53ef\u80fd\u6709\u70b9\u957f\uff0c\u4f46\u662f\u5e0c\u671b\u5927\u5bb6\u53ef\u4ee5\u9605\u8bfb\u5b8c\uff0c\u589e\u957f\u81ea\u5df1\u7684\u77e5\u8bc6\uff0c\u6700\u91cd\u8981\u7684\u662f\u5e0c\u671b\u5bf9\u5404\u4f4d\u6709\u6240\u5e2e\u52a9\uff0c\u53ef\u4ee5\u89e3\u51b3\u4e86\u60a8\u7684\u95ee\u9898\uff0c\u4e0d\u8981\u5fd8\u4e86\u6536\u85cf\u672c\u7ad9\u5594\u3002<\/p>\n
IOMMU(i\/omemorymanagementunit)\u3002iommu\u6709\u4e24\u5927\u529f\u80fd\uff1a\u63a7\u5236\u8bbe\u5907dma\u5730\u5740\u6620\u5c04\u5230\u673a\u5668\u7269\u7406\u5730\u5740\uff08dmar\uff09\uff0c\u4e2d\u65ad\u91cd\u6620\u5c04\uff08intremap\uff09\uff08\u53ef\u9009\uff09<\/p>\n
1.1dma\u5730\u5740\u7a7a\u95f4\u6620\u5c04<\/p>\n
Iommu\u7684\u4e3b\u8981\u529f\u80fd\u4e3a\u8bbe\u5907dma\u65f6\u523b\u80fd\u591f\u8bbf\u95ee\u673a\u5668\u7684\u7269\u7406\u5185\u5b58\u533a\uff0c\u540c\u65f6\u4fdd\u8bc1\u5b89\u5168\u6027\u3002<\/p>\n
\u5728\u6ca1\u6709Iommu\u7684\u65f6\u5019\uff0c\u8bbe\u5907\u901a\u8fc7dma\u53ef\u4ee5\u8bbf\u95ee\u5230\u673a\u5668\u7684\u5168\u90e8\u7684\u5730\u5740\u7a7a\u95f4\u3002<\/p>\n
1\u3001\u8fd9\u79cd\u673a\u5236\u4e0b\u5982\u679c\u5c06\u8bbe\u5907\u7684\u9a71\u52a8\u653e\u5728\u7528\u6237\u6001\uff0c\u90a3\u4e48\u5982\u4f55\u4fdd\u62a4\u673a\u5668\u7269\u7406\u5185\u5b58\u533a\u5bf9\u4e8e\u7528\u6237\u6001\u9a71\u52a8\u6846\u67b6\u8bbe\u8ba1\u5e26\u6765\u6311\u6218\u3002\u5f53\u51fa\u73b0\u4e86iommu\u4ee5\u540e\uff0ciommu\u901a\u8fc7\u63a7\u5236\u6bcf\u4e2a\u8bbe\u5907dma\u5730\u5740\u5230\u5b9e\u9645\u7269\u7406\u5730\u5740\u7684\u6620\u5c04\u8f6c\u6362\uff0c\u4f7f\u5f97\u5728\u4e00\u5b9a\u7684\u5185\u6838\u9a71\u52a8\u6846\u67b6\u4e0b\uff0c\u7528\u6237\u6001\u9a71\u52a8\u80fd\u80fd\u591f\u5b8c\u5168\u64cd\u4f5c\u67d0\u4e2a\u8bbe\u5907dma\u548c\u4e2d\u65ad\u6210\u4e3a\u53ef\u80fd\u3002<\/p>\n
2\u3001\u5982\u679c\u5c06\u8fd9\u4e2a\u7269\u7406\u8bbe\u5907\u901a\u8fc7\u900f\u4f20\u7684\u65b9\u5f0f\u8fdb\u5165\u5230\u865a\u62df\u5316\u865a\u62df\u673a\u91cc\uff0c\u865a\u62df\u673a\u7684\u8bbe\u5907\u9a71\u52a8\u914d\u7f6e\u8bbe\u5907\u7684dma\u540e\uff0chypervisor\u5fc5\u987b\u5728\u900f\u4f20\u8bbe\u5907dma\u8bbf\u95ee\u65f6\u523b\uff0c\u5bf9dma\u8bbf\u95ee\u8fdb\u884c\u622a\u83b7\uff0c\u5c06\u5176\u4e2ddma\u8bbf\u95ee\u7684\u865a\u62df\u673a\u7269\u7406\u5730\u5740\uff0c\u8f6c\u6362\u4e3ahypervisor\u4e3a\u865a\u62df\u673a\u5206\u914d\u7684\u7269\u7406\u5730\u5740\uff0c\u4e5f\u5c31\u662f\u9700\u8981\u5c06\u865a\u62df\u673a\u900f\u4f20\u8bbe\u5907dma\u8bbf\u95ee\u505avpaddr(\u865a\u62df\u673a\u7269\u7406\u5730\u5740)—->ppaddr\uff08\u7269\u7406\u673a\u7269\u7406\u5730\u5740\uff09\u3002\u8fd9\u90e8\u5206\u622a\u83b7\u5bf9\u865a\u62df\u673adma\u6765\u8bf4\u5e26\u6765\u5207\u6362\u5230hypervisor\u5f00\u9500\uff0chypervisor\u8f6c\u6362\u5730\u5740\u5f00\u9500\u3002<\/p>\n
\u5f53\u5f15\u5165\u4e86iommu\u4ee5\u540e\uff0c\u8fd9\u90e8\u5206\u5f00\u9500\u7531iommu\u786c\u4ef6\u627f\u62c5\uff0c\u6240\u6709hypervisor\u5de5\u4f5c\u5c31\u66f4\u52a0\u7b80\u5355\uff0c\u53ea\u9700\u8981\u5c06\u900f\u4f20\u8bbe\u5907Iommudma\u5730\u5740\u6620\u5c04\u8868\u4f7f\u7528vpaddr—>ppaddr\u5730\u5740\u8f6c\u6362\u8868\u5373\u53ef\uff08\u8fd9\u90e8\u5206\u8868\u5728hypervisor\u91cc\u914d\u7f6e\u5728ept\u4e2d\uff09<\/p>\n
3\u3001\u65b9\u4fbf\u4e86\u8001\u5f0f32\u4f4dpci\u786c\u4ef6\u572864\u4f4d\u673a\u5668\u4e0a\u7684\u4f7f\u7528\u3002\u53ea\u9700\u8981\u5728iommu\u5730\u5740\u6620\u5c04\u8868\u4e0a\u914d\u7f6e32bitpci\u8bbe\u5907dma\u5730\u5740–>64\u4f4d\u673a\u5668\u7269\u7406\u5730\u5740\u5373\u53ef\u3002<\/p>\n
4\u3001\u65b9\u4fbf\u4e86\u4e3b\u673aos\u914d\u7f6e\u8bbe\u5907dma\u5de5\u4f5c\uff0c\u56e0\u4e3adma\u8981\u6c42\u4f7f\u7528\u8fde\u7eed\u7684\u5730\u5740\u7a7a\u95f4\u8fdb\u884c\u8bfb\u5199\uff0c\u6709\u4e86iommu\u7684\u5b58\u5728os\u5c31\u53ef\u4ee5\u4e3a\u8bbe\u5907\u914d\u7f6e\u8fde\u7eed\u7684dma\u5730\u5740\u800c\u771f\u6b63\u5bf9\u5e94\u7684\u975e\u8fde\u7eed\u7684\u7269\u7406\u5730\u5740<\/p>\n
\u84b8\u538b\u7070\u7802\u7816\u3002\u662f\u4ee5\u9002\u5f53\u6bd4\u4f8b\u7684\u77f3\u7070\u548c\u77f3\u82f1\u7802\u3001\u7802\u6216\u7ec6\u7802\u5ca9\uff0c\u7ecf\u78e8\u7ec6\u3001\u52a0\u6c34\u62cc\u548c\u3001\u534a\u5e72\u6cd5\u538b\u5236\u6210\u578b\u5e76\u7ecf\u84b8\u538b\u517b\u62a4\u800c\u6210\uff0c\u662f\u66ff\u4ee3\u70e7\u7ed3\u9ecf\u571f\u7816\u7684\u4ea7\u54c1\u3002<\/p>\n
\u84b8\u538b\u7070\u7802\u7816\u7684\u5916\u5f62\u4e3a\u76f4\u89d2\u516d\u9762\u4f53\uff0c\u6807\u51c6\u5c3a\u5bf8\u4e0e\u666e\u901a\u9ecf\u571f\u7816\u4e00\u6837\u3002\u6839\u636e\u6297\u538b\u5f3a\u5ea6\u548c\u6297\u6298\u5f3a\u5ea6\u5206\u4e3aMU10\u3001MU15\u3001MU20\u3001MU25\u56db\u4e2a\u5f3a\u5ea6\u7b49\u7ea7\u3002<\/p>\n
\u9996\u6279C919\u67096\u67b6\u3002\u56e0\u4e3a\u56fd\u4ea7\u5927\u578b\u5ba2\u673aC919\u4e8e2017\u5e745\u67085\u65e5\u5b8c\u6210\u4e86\u9996\u98de\uff0c\u968f\u540e\u5f00\u59cb\u4e86\u4e3a\u671f\u82e5\u5e72\u5e74\u7684\u7814\u5236\u548c\u8bd5\u98de\u5de5\u4f5c\u30022021\u5e743\u670811\u65e5\uff0c\u4e2d\u56fd\u5546\u98de\u516c\u53f8\u5ba3\u5e03\uff0c\u9996\u62796\u67b6\u56fd\u4ea7\u5927\u578b\u5ba2\u673aC919\u5df2\u7ecf\u5168\u90e8\u4ea4\u4ed8\u5b8c\u6210\u3002\u8fd9\u6807\u5fd7\u7740C919\u91cf\u4ea7\u7684\u5927\u5e55\u6b63\u5f0f\u62c9\u5f00\uff0c\u540e\u7eed\u5c06\u9010\u6b65\u63d0\u9ad8\u4ea7\u91cf\u5e76\u4ea4\u4ed8\u4f7f\u7528\u3002<\/p>\n
\u5173\u4e8e\u672c\u6b21\u5947\u8ff9mu\u6846\u67b6\u548c\u6846\u67b6\u7ed3\u6784\u7528\u4ec0\u4e48\u7816\u7684\u95ee\u9898\u5206\u4eab\u5230\u8fd9\u91cc\u5c31\u7ed3\u675f\u4e86\uff0c\u5982\u679c\u89e3\u51b3\u4e86\u60a8\u7684\u95ee\u9898\uff0c\u6211\u4eec\u975e\u5e38\u9ad8\u5174\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
\u672c\u7bc7\u6587\u7ae0\u7ed9\u5927\u5bb6\u8c08\u8c08\u5947\u8ff9mu\u6846\u67b6\uff0c\u4ee5\u53ca\u6846\u67b6\u7ed3\u6784\u7528\u4ec0\u4e48\u7816\u5bf9\u5e94\u7684\u77e5\u8bc6\u70b9\uff0c\u6587\u7ae0\u53ef\u80fd\u6709\u70b9\u957f\uff0c\u4f46\u662f\u5e0c\u671b\u5927\u5bb6\u53ef\u4ee5\u9605\u8bfb\u5b8c\uff0c\u589e\u957f\u81ea\u5df1\u7684\u77e5\u8bc6\uff0c\u6700\u91cd\u8981\u7684\u662f\u5e0c\u671b\u5bf9\u5404\u4f4d\u6709\u6240\u5e2e\u52a9\uff0c\u53ef\u4ee5\u89e3\u51b3\u4e86\u60a8\u7684\u95ee\u9898\uff0c\u4e0d\u8981\u5fd8\u4e86\u6536\u85cf\u672c\u7ad9\u5594\u3002 \u4e3b\u677f\u7684iommu\u662f\u4ec0\u4e48\u529f\u80fd IOMMU(i\/o…<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"topic":[],"_links":{"self":[{"href":"http:\/\/stmu.1000uc.com\/mu\/wp-json\/wp\/v2\/posts\/64955"}],"collection":[{"href":"http:\/\/stmu.1000uc.com\/mu\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/stmu.1000uc.com\/mu\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/stmu.1000uc.com\/mu\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/stmu.1000uc.com\/mu\/wp-json\/wp\/v2\/comments?post=64955"}],"version-history":[{"count":1,"href":"http:\/\/stmu.1000uc.com\/mu\/wp-json\/wp\/v2\/posts\/64955\/revisions"}],"predecessor-version":[{"id":64956,"href":"http:\/\/stmu.1000uc.com\/mu\/wp-json\/wp\/v2\/posts\/64955\/revisions\/64956"}],"wp:attachment":[{"href":"http:\/\/stmu.1000uc.com\/mu\/wp-json\/wp\/v2\/media?parent=64955"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/stmu.1000uc.com\/mu\/wp-json\/wp\/v2\/categories?post=64955"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/stmu.1000uc.com\/mu\/wp-json\/wp\/v2\/tags?post=64955"},{"taxonomy":"topic","embeddable":true,"href":"http:\/\/stmu.1000uc.com\/mu\/wp-json\/wp\/v2\/topic?post=64955"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}