{"id":211630,"date":"2023-12-22T11:10:26","date_gmt":"2023-12-22T03:10:26","guid":{"rendered":"https:\/\/www.idc.net\/help\/211630\/"},"modified":"2023-12-22T11:10:26","modified_gmt":"2023-12-22T03:10:26","slug":"linux-%e6%9c%8d%e5%8a%a1%e5%99%a8%e5%ae%89%e5%85%a8%e7%ad%96%e7%95%a5%e6%8a%80%e5%b7%a7%ef%bc%9a%e5%90%af%e7%94%a8-iommu-%e9%98%b2%e6%ad%a2-dma-%e6%94%bb%e5%87%bb","status":"publish","type":"post","link":"https:\/\/idc.net\/help\/211630\/","title":{"rendered":"Linux \u670d\u52a1\u5668\u5b89\u5168\u7b56\u7565\u6280\u5de7\uff1a\u542f\u7528 IOMMU \u9632\u6b62 DMA \u653b\u51fb"},"content":{"rendered":"<p><title id=\"linux-%e6%9c%8d%e5%8a%a1%e5%99%a8%e5%ae%89%e5%85%a8%e7%ad%96%e7%95%a5%e6%8a%80%e5%b7%a7%ef%bc%9a%e5%90%af%e7%94%a8-iommu-%e9%98%b2%e6%ad%a2-dma-%e6%94%bb%e5%87%bb-iGXzypKRVD\">Linux \u670d\u52a1\u5668\u5b89\u5168\u7b56\u7565\u6280\u5de7\uff1a\u542f\u7528 IOMMU \u9632\u6b62 DMA \u653b\u51fb<\/title><\/p>\n<h1 id=\"linux-%e6%9c%8d%e5%8a%a1%e5%99%a8%e5%ae%89%e5%85%a8%e7%ad%96%e7%95%a5%e6%8a%80%e5%b7%a7%ef%bc%9a%e5%90%af%e7%94%a8-iommu-%e9%98%b2%e6%ad%a2-dma-%e6%94%bb%e5%87%bb-iGXzypKRVD\">Linux \u670d\u52a1\u5668\u5b89\u5168\u7b56\u7565\u6280\u5de7\uff1a\u542f\u7528 IOMMU \u9632\u6b62 DMA \u653b\u51fb<\/h1>\n<p>\u5728\u5f53\u4eca\u6570\u5b57\u5316\u65f6\u4ee3\uff0c\u670d\u52a1\u5668\u5b89\u5168\u5bf9\u4e8e\u4efb\u4f55\u4f01\u4e1a\u90fd\u81f3\u5173\u91cd\u8981\u3002Linux \u4f5c\u4e3a\u4e00\u79cd\u5e7f\u6cdb\u4f7f\u7528\u7684\u64cd\u4f5c\u7cfb\u7edf\uff0c\u5176\u5b89\u5168\u6027\u5907\u53d7\u5173\u6ce8\u3002\u672c\u6587\u5c06\u4ecb\u7ecd\u4e00\u79cd\u91cd\u8981\u7684\u5b89\u5168\u7b56\u7565\u6280\u5de7\uff1a\u542f\u7528 IOMMU \u9632\u6b62 DMA \u653b\u51fb\u3002<\/p>\n<h2 id=\"%e4%bb%80%e4%b9%88%e6%98%af-dma-%e6%94%bb%e5%87%bb%ef%bc%9f-iGXzypKRVD\">\u4ec0\u4e48\u662f DMA \u653b\u51fb\uff1f<\/h2>\n<p>DMA\uff08Direct Memory Access\uff0c\u76f4\u63a5\u5185\u5b58\u8bbf\u95ee\uff09\u662f\u4e00\u79cd\u8ba1\u7b97\u673a\u6280\u672f\uff0c\u5141\u8bb8\u5916\u90e8\u8bbe\u5907\u76f4\u63a5\u8bbf\u95ee\u7cfb\u7edf\u5185\u5b58\uff0c\u800c\u4e0d\u9700\u8981\u7ecf\u8fc7 CPU \u7684\u5e72\u9884\u3002\u8fd9\u79cd\u6280\u672f\u5728\u63d0\u9ad8\u6570\u636e\u4f20\u8f93\u901f\u5ea6\u548c\u6548\u7387\u65b9\u9762\u975e\u5e38\u6709\u7528\uff0c\u4f46\u540c\u65f6\u4e5f\u5e26\u6765\u4e86\u5b89\u5168\u98ce\u9669\u3002<\/p>\n<p>DMA \u653b\u51fb\u662f\u6307\u9ed1\u5ba2\u5229\u7528\u6076\u610f\u8bbe\u5907\u6216\u8f6f\u4ef6\u901a\u8fc7 DMA \u529f\u80fd\u6765\u8bbf\u95ee\u670d\u52a1\u5668\u5185\u5b58\uff0c\u4ece\u800c\u83b7\u53d6\u654f\u611f\u6570\u636e\u6216\u6267\u884c\u6076\u610f\u4ee3\u7801\u3002\u8fd9\u79cd\u653b\u51fb\u65b9\u5f0f\u53ef\u4ee5\u7ed5\u8fc7\u64cd\u4f5c\u7cfb\u7edf\u7684\u5b89\u5168\u63aa\u65bd\uff0c\u56e0\u6b64\u975e\u5e38\u5371\u9669\u3002<\/p>\n<h2 id=\"%e4%bb%80%e4%b9%88%e6%98%af-iommu%ef%bc%9f-iGXzypKRVD\">\u4ec0\u4e48\u662f IOMMU\uff1f<\/h2>\n<p>IOMMU\uff08Input-Output Memory Management Unit\uff0c\u8f93\u5165\u8f93\u51fa\u5185\u5b58\u7ba1\u7406\u5355\u5143\uff09\u662f\u4e00\u79cd\u786c\u4ef6\u6280\u672f\uff0c\u7528\u4e8e\u7ba1\u7406 DMA \u8bbf\u95ee\u3002\u5b83\u53ef\u4ee5\u4e3a\u6bcf\u4e2a\u8bbe\u5907\u5206\u914d\u72ec\u7acb\u7684\u5185\u5b58\u7a7a\u95f4\uff0c\u5e76\u9650\u5236\u5176\u5bf9\u7cfb\u7edf\u5185\u5b58\u7684\u8bbf\u95ee\u8303\u56f4\u3002<\/p>\n<p>\u901a\u8fc7\u542f\u7528 IOMMU\uff0c\u53ef\u4ee5\u6709\u6548\u9632\u6b62 DMA \u653b\u51fb\u3002\u5f53\u6076\u610f\u8bbe\u5907\u6216\u8f6f\u4ef6\u5c1d\u8bd5\u8bbf\u95ee\u7cfb\u7edf\u5185\u5b58\u65f6\uff0cIOMMU \u53ef\u4ee5\u9650\u5236\u5176\u8bbf\u95ee\u8303\u56f4\uff0c\u4ece\u800c\u4fdd\u62a4\u670d\u52a1\u5668\u7684\u5b89\u5168\u3002<\/p>\n<h2 id=\"%e5%a6%82%e4%bd%95%e5%90%af%e7%94%a8-iommu%ef%bc%9f-iGXzypKRVD\">\u5982\u4f55\u542f\u7528 IOMMU\uff1f<\/h2>\n<p>\u8981\u542f\u7528 IOMMU\uff0c\u60a8\u9700\u8981\u8fdb\u884c\u4ee5\u4e0b\u6b65\u9aa4\uff1a<\/p>\n<ol>\n<li>\u68c0\u67e5\u7cfb\u7edf\u662f\u5426\u652f\u6301 IOMMU\u3002\u60a8\u53ef\u4ee5\u901a\u8fc7\u8fd0\u884c\u4ee5\u4e0b\u547d\u4ee4\u6765\u68c0\u67e5\uff1a<\/li>\n<pre><code>grep -E '^[[:alnum:]]' \/sys\/class\/iommu\/*\/name<\/code><\/pre>\n<li>\u7f16\u8f91 GRUB \u914d\u7f6e\u6587\u4ef6\u3002\u6253\u5f00\u7ec8\u7aef\u5e76\u8fd0\u884c\u4ee5\u4e0b\u547d\u4ee4\uff1a<\/li>\n<pre><code>sudo nano \/etc\/default\/grub<\/code><\/pre>\n<li>\u5728\u6253\u5f00\u7684\u6587\u4ef6\u4e2d\uff0c\u627e\u5230 GRUB_CMDLINE_LINUX_DEFAULT \u884c\uff0c\u5e76\u5728\u5f15\u53f7\u5185\u6dfb\u52a0\u4ee5\u4e0b\u53c2\u6570\uff1a<\/li>\n<pre><code>intel_iommu=on<\/code><\/pre>\n<li>\u4fdd\u5b58\u6587\u4ef6\u5e76\u9000\u51fa\u7f16\u8f91\u5668\u3002<\/li>\n<li>\u66f4\u65b0 GRUB \u914d\u7f6e\u3002\u8fd0\u884c\u4ee5\u4e0b\u547d\u4ee4\uff1a<\/li>\n<pre><code>sudo update-grub<\/code><\/pre>\n<li>\u91cd\u65b0\u542f\u52a8\u670d\u52a1\u5668\u3002<\/li>\n<\/ol>\n<p>\u5b8c\u6210\u4ee5\u4e0a\u6b65\u9aa4\u540e\uff0c\u60a8\u7684 Linux \u670d\u52a1\u5668\u5c06\u542f\u7528 IOMMU\uff0c\u5e76\u83b7\u5f97\u4e86\u66f4\u9ad8\u7684\u5b89\u5168\u6027\u3002<\/p>\n<h2 id=\"%e6%80%bb%e7%bb%93-iGXzypKRVD\">\u603b\u7ed3<\/h2>\n<p>\u5728\u4fdd\u62a4\u670d\u52a1\u5668\u5b89\u5168\u65b9\u9762\uff0c\u542f\u7528 IOMMU \u662f\u4e00\u79cd\u91cd\u8981\u7684\u7b56\u7565\u6280\u5de7\u3002\u901a\u8fc7\u9650\u5236 DMA \u8bbf\u95ee\u8303\u56f4\uff0c\u53ef\u4ee5\u6709\u6548\u9632\u6b62\u9ed1\u5ba2\u5229\u7528\u6076\u610f\u8bbe\u5907\u6216\u8f6f\u4ef6\u8fdb\u884c\u653b\u51fb\u3002Linux \u4f5c\u4e3a\u4e00\u79cd\u5e7f\u6cdb\u4f7f\u7528\u7684\u64cd\u4f5c\u7cfb\u7edf\uff0c\u652f\u6301 IOMMU \u529f\u80fd\uff0c\u5e76\u63d0\u4f9b\u4e86\u7b80\u5355\u7684\u914d\u7f6e\u65b9\u6cd5\u3002<\/p>\n<p>\u5982\u679c\u60a8\u6b63\u5728\u5bfb\u627e\u53ef\u9760\u7684\u670d\u52a1\u5668\u63d0\u4f9b\u5546\uff0c\u540e\u6d6a\u4e91\u662f\u60a8\u7684\u9996\u9009\u3002\u540e\u6d6a\u4e91\u63d0\u4f9b\u9999\u6e2f\u670d\u52a1\u5668\u3001\u7f8e\u56fd\u670d\u52a1\u5668\u548c\u4e91\u670d\u52a1\u5668\u7b49\u591a\u79cd\u4ea7\u54c1\uff0c\u4e3a\u60a8\u63d0\u4f9b\u9ad8\u6027\u80fd\u548c\u5b89\u5168\u7684\u670d\u52a1\u5668\u89e3\u51b3\u65b9\u6848\u3002\u60a8\u53ef\u4ee5\u8bbf\u95ee<a href=\"https:\/\/idc.net\">\u540e\u6d6a\u4e91\u5b98\u7f51<\/a>\u4e86\u89e3\u66f4\u591a\u4fe1\u606f\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Linux \u670d\u52a1\u5668\u5b89\u5168\u7b56\u7565\u6280\u5de7\uff1a\u542f\u7528 IOMMU \u9632\u6b62 DMA \u653b\u51fb Linux \u670d\u52a1\u5668\u5b89\u5168\u7b56\u7565\u6280\u5de7\uff1a\u542f\u7528 I [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[27],"tags":[],"class_list":["post-211630","post","type-post","status-publish","format-standard","hentry","category-centos"],"_links":{"self":[{"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/posts\/211630","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/comments?post=211630"}],"version-history":[{"count":0,"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/posts\/211630\/revisions"}],"wp:attachment":[{"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/media?parent=211630"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/categories?post=211630"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/tags?post=211630"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}