\u5982\u679c\u4f60\u6000\u7591\u4f60\u6ca1\u6709\u542f\u7528KVM\u63d0\u4f9b\u7684\u786c\u4ef6\u52a0\u901f\u529f\u80fd\u3002\u4f60\u53ef\u4ee5\u6309\u7167\u4e0b\u9762\u7684\u6b65\u9aa4\u505a\u68c0\u67e5\u3002\u9996\u5148\uff0c\u770b\u770b\u4f60\u6709\u6ca1\u6709\u5f97\u5230\u4e0b\u9762\u7684\u63d0\u793a\u4fe1\u606f\uff1a<\/p>\n
qemu-system-x86_64 -hda myvm.qcow2
\n\topen \/dev\/kvm: No such file or directory
\n\tCould not initialize KVM, will disable KVM support<\/p>\n
\u5982\u679c\u662f\u8fd9\u79cd\u60c5\u51b5\uff0c\u8bf7\u518d\u68c0\u67e5\uff1a
\n\t1. kvm\u6a21\u5757\u88ab\u6b63\u786e\u8f7d\u5165\u4e86\u5417\uff1f lsmod | grep kvm.
\n\t2. \u67e5\u770b dmesg \u7684\u8f93\u51fa\uff0c\u4fdd\u8bc1\u6ca1\u6709\u8fd9\u4e2a\u63d0\u793a\u4fe1\u606f\uff1a “KVM, disabled by BIOS”.
\n\t3. \u8bf7\u786e\u4fdd\/dev\/kvm \u786e\u5b9e\u5b58\u5728\uff0c\u800c\u4e14\u4f60\u6709\u6743\u9650\u4f7f\u7528\u5b83\u3002<\/p>\n
\u5176\u5b83\u8bca\u65ad\u65b9\u5f0f\uff1a
\n\t1. \u5982\u679c\u4f60\u80fd\u4f7f\u7528 QEMU monitor ( ctrl-alt-2, \u518d ctrl-alt-1 \u56de\u5230 VM \u7684\u663e\u793a\u5c4f )\uff0c\u6572\u5165 info kvm \u547d\u4ee4\u3002\u5982\u679c\u6b63\u5e38\u7684\u8bdd\uff0c\u5e94\u8be5\u6709“KVM support: enabled”\u8fd9\u6761\u4fe1\u606f\u8f93\u51fa\u3002
\n\t2. \u5728host\u673a\u4e0a\u6572 lsmod | grep kvm \u547d\u4ee4\uff0c\u770b\u770b\u8f93\u51fa\u7684\u6700\u53f3\u680f\u3002\u5982\u679ckvm\u5728\u6b63\u5e38\u8fd0\u884c\u7684\u8bdd\uff0c\u8fd9\u4e2a\u6570\u5b57\u4e0d\u80fd\u662f0\u3002\u8fd9\u884c\u7684\u6570\u5b57\u4e0e\u67b6\u6784\u76f8\u5173\u7684\u6a21\u5757(\u4e00\u822c\u6307\u7684\u662fkvm_intel,\u6216kvm_amd)\u6709\u8054\u7cfb\uff0c\u5b83\u663e\u793a\u4e86\u6709\u591a\u5c11\u4e2aVM\u6b63\u5728\u4f7f\u7528\u8fd9\u4e2a\u6a21\u5757\u3002\u4e3e\u4f8b\u8bf4\u660e\uff0c\u5982\u679c\u4f60\u6709\u4e24\u4e2a\u865a\u62df\u673a\u6b63\u5728\u4f7f\u7528KVM\u6a21\u5757\uff0chost\u673a\u7684CPU\u4f7f\u7528\u7684\u662fvt\u6280\u672f\uff0c\u90a3\u4e48\u5c31\u4f1a\u5f97\u5230\uff1a<\/p>\n
# lsmod | grep kvm
\n\tkvm_intel 44896 2
\n\tkvm 159656 1 kvm_intel<\/p>\n
<\/p>\n
\u5f53\u8fde\u63a5VNC\u7ec8\u7aef\u7684\u65f6\u5019\uff0c\u51fa\u73b0“rect too big”\u63d0\u793a\u4fe1\u606f\uff0c\u8fd9\u65f6VNC\u7684\u4f1a\u8bdd\u4e5f\u7ed3\u675f\u4e86\u3002<\/p>\n
\u8fd9\u662f\u56e0\u4e3a\u5f53\u524dVNC\u534f\u8bae\u7684\u4e00\u4e2a\u7f3a\u9677\uff0c\u5728\u5904\u7406\u5373\u65f6\u8c61\u7d20\u683c\u5f0f\u53d8\u5316\u65f6\u51fa\u73b0\uff0c\u53ef\u53c2\u770b \u8fd9\u4e2a\u8d34\u5b50<\/a>\u3002\u5982\u679c\u4f60\u5728\u4f7f\u7528TigerVNC\uff0c\u901a\u8fc7\u7981\u7528\u5373\u65f6\u8c61\u7d20\u7f16\u7801\u9009\u9879\uff0cvncviewer\u7684\u547d\u4ee4\u884c\u9009\u9879\u9009\u5b9a\u4e3a-AutoSelect=0\uff0c\u4f60\u5c31\u53ef\u4ee5\u907f\u514d\u8fd9\u4e2a\u95ee\u9898\u3002\u4f60\u8fd8\u53ef\u4ee5\u67e5\u9605vncviewer\u7684man\u5e2e\u52a9\uff0c\u6839\u636e\u8fde\u63a5\u901f\u5ea6\u7981\u7528\u81ea\u52a8\u9009\u62e9\u7f16\u7801\u65b9\u5f0f\u3002<\/p>\n <\/p>\n KVM\u4f7f\u7528QEMU\u4f5c\u4e3a\u8bbe\u5907\u7684\u6a21\u62df\u5668\u3002\u8bf7\u53c2\u770bQEMU\u7684\u7f51\u7edc\u76f8\u5173wiki (QEMU network wiki page<\/a>)\u3002 <\/p>\n <\/p>\n \u8fd9\u5e38\u5e38\u53d1\u751f\u5728\u4f7f\u7528\u7f51\u7edc\u7cfb\u7edf\u7684\u65f6\u5019\uff0c\u6bd4\u5982\u900f\u8fc7NFS\u6216Samba\u3002 \u4e0d\u7ba1\u662f\u7cfb\u7edf\u65f6\u949f\u8fd8\u662fRTC\uff0c\u4fdd\u8bc1\u7a33\u5b9a\u53ef\u9760\u7684\u65f6\u673a\u975e\u5e38\u91cd\u8981\u3002Tell-tale signs of related trouble in VMs (apparently qemu\/KVM\/VMWare etc. are all affected) are e.g. "make[2]: Warning: File `XXXXX\/cmakelists_rebuilder.stamp' has modification time 0.37 s in the future" "Clock skew detected. Your build may be incomplete." <\/p>\n \u4f60\u53ef\u4ee5\u8bd5\u8bd5\u628ahost\u673a\u7684.config\u6587\u4ef6\u4e2d\u7684 CONFIG_HPET_EMULATE_RTC \u9009\u9879\u8bbe\u6210y\u3002\u5373 CONFIG_HPET_EMULATE_RTC=y<\/p>\n \u4eceIntel\u4e3b\u673a\u4e0a\u542f\u52a8\u865a\u62df\u5ba2\u6237\u673a\u65f6\u51fa\u73b0“Exception 13” \u6216 “Exception 12”\u51fa\u9519\u4fe1\u606f,\u600e\u4e48\u529e\uff1f<\/strong><\/p>\n \u8bf7\u53c2 \u6a21\u62dfIntel\u7684\u5b9e\u6a21\u5f0f\u7684\u95ee\u9898<\/a> \u3002<\/p>\n <\/p>\n Intel VT\u548cAMD-V\u90fd\u6ca1\u6709\u63d0\u4f9b\u4e00\u4e2a\u5224\u65ad\u5f53\u524d\u6709\u6ca1\u6709\u8f6f\u4ef6\u5728\u4f7f\u7528\u786c\u4ef6\u865a\u62df\u6269\u5c55\u7684\u673a\u5236\u3002\u8fd9\u5c31\u610f\u5473\u7740\uff0c\u5982\u679c\u6709\u4e24\u4e2a\u5185\u6838\u6a21\u5757\u540c\u65f6\u5c1d\u8bd5\u4f7f\u7528\u786c\u4ef6\u865a\u62df\u6269\u5c55\u529f\u80fd\uff0c\u975e\u5e38\u60b2\u60e8\u7684\u4e8b\u60c5\u5c31\u53d1\u751f\u4e86\u3002\u5982\u679c\u6b7b\u673a\u60c5\u51b5\u53d1\u751f\u5728\u4f60\u540c\u65f6\u4f7f\u7528\u53e6\u4e00\u79cd\u865a\u62df\u673a\u7684\u65f6\u5019\uff0c\u4f60\u8981\u786e\u4fdd\u53e6\u4e00\u79cd\u865a\u62df\u673a\u6ca1\u6709\u4f7f\u7528\u786c\u4ef6\u865a\u62df\u6269\u5c55\uff0c\u4f60\u518d\u62a5\u544abug\u7ed9KVM\u5f00\u53d1\u7ec4\u3002<\/p>\n <\/p>\n <\/p>\n \u8bd5\u8bd5\u4f7f\u7528\u9009\u9879 -usb -usbdevice tablet \u542f\u52a8 kvm\/qemu\u3002\u5982\u679c\u8fd8\u4e0d\u884c\uff0c\u5728\u542f\u52a8\u524d\u8bbe\u5b9a\u73af\u5883\u53d8\u91cfSDL_VIDEO_X11_DGAMOUSE\u4e3a0\u3002\u5982\uff1a<\/strong><\/p>\n $ export SDL_VIDEO_X11_DGAMOUSE=0<\/p>\n \u53ef\u53c2\u770b http:\/\/wiki.clug.org.za\/wiki\/QEMU_mouse_not_working<\/a> \u3002<\/p>\n \u7ffb\u8bd1\u4e0d\u6613\uff0c\u8f6c\u8f7d\u8bf7\u6ce8\u660e\u51fa\u5904 ykyi.net<\/a><\/strong><\/p>\n","protected":false},"excerpt":{"rendered":" \u6211\u5728\u4f7f\u7528QEMU\uff0c\u5982\u4f55\u77e5\u9053\u6211\u6709\u6ca1\u6709\u542f\u7528KVM\u7684\u786c\u4ef6\u52a0\u901f\u529f\u80fd? \u5982\u679c\u4f60\u6000\u7591\u4f60\u6ca1\u6709\u542f\u7528KVM\u63d0\u4f9b\u7684\u786c\u4ef6\u52a0\u901f\u529f\u80fd\u3002\u4f60\u53ef\u4ee5\u6309\u7167\u4e0b\u9762\u7684\u6b65\u9aa4\u505a\u68c0\u67e5\u3002\u9996\u5148\uff0c\u770b\u770b\u4f60\u6709\u6ca1\u6709\u5f97\u5230\u4e0b\u9762\u7684\u63d0\u793a\u4fe1\u606f\uff1a qemu-system-x86_64 -hda myvm.qcow2 open \/dev\/kvm: No such file or directory Could not initialize KVM, will disable KVM support \u5982\u679c\u662f\u8fd9\u79cd\u60c5\u51b5\uff0c\u8bf7\u518d\u68c0\u67e5\uff1a 1. kvm\u6a21\u5757\u88ab\u6b63\u786e\u8f7d\u5165\u4e86\u5417\uff1f lsmod | grep kvm. 2. \u67e5\u770b dmesg \u7684\u8f93\u51fa\uff0c\u4fdd\u8bc1\u6ca1\u6709\u8fd9\u4e2a\u63d0\u793a\u4fe1\u606f\uff1a “KVM, disabled by BIOS”. 3. \u8bf7\u786e\u4fdd\/dev\/kvm \u786e\u5b9e\u5b58\u5728\uff0c\u800c\u4e14\u4f60\u6709\u6743\u9650\u4f7f\u7528\u5b83\u3002 \u5176\u5b83\u8bca\u65ad\u65b9\u5f0f\uff1a 1. \u5982\u679c\u4f60\u80fd\u4f7f\u7528 QEMU monitor ( ctrl-alt-2, \u518d ctrl-alt-1 \u56de\u5230 VM \u7684\u663e\u793a\u5c4f )\uff0c\u6572\u5165 info kvm \u547d\u4ee4\u3002\u5982\u679c\u6b63\u5e38\u7684\u8bdd\uff0c\u5e94\u8be5\u6709“KVM support: … Continue reading “KVM\u4f60\u95ee\u6211\u7b54 FAQ (\u4e09)”<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[6,7,8],"tags":[48,51,52,68,122],"class_list":["post-574","post","type-post","status-publish","format-standard","hentry","category-tech_articles","category-unix_linux","category-virtualization","tag-kvm","tag-linux-2","tag-linux-kernel","tag-qemu","tag--virtulization"],"_links":{"self":[{"href":"https:\/\/ykyi.net\/index.php?rest_route=\/wp\/v2\/posts\/574","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/ykyi.net\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/ykyi.net\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/ykyi.net\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/ykyi.net\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=574"}],"version-history":[{"count":0,"href":"https:\/\/ykyi.net\/index.php?rest_route=\/wp\/v2\/posts\/574\/revisions"}],"wp:attachment":[{"href":"https:\/\/ykyi.net\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=574"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/ykyi.net\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=574"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/ykyi.net\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=574"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}
\n\u5982\u679c\u6211\u7684\u5ba2\u6237\u673a\u662f\u4ece\u8fdc\u7a0b\u8bbf\u95ee\u7684\u4f60\u8be5\u5982\u4f55\u8bbe\u7f6e\u6211\u7684\u7f51\u7edc\u5462\uff1f\u4ee5\u53ca\uff1a\u6211\u7684\u5ba2\u6237\u673a\u7f51\u7edc\u51fa\u95ee\u9898\u4e86\u6211\u8be5\u600e\u4e48\u529e\uff1f<\/h3>\n
\n\t\u4f60\u5e94\u8be5\u4f1a\u5bf9Root Networking Mode\u548c\u7f51\u7edc\u6865\u63a5\u611f\u5174\u8da3\u3002\u5ba2\u6237\u673a\u7aef\u7684\u7f51\u7edc\u9501\u5b9a\u6709\u53ef\u80fd\u4f1a\u56e0\u4e3atun\/tap\u6865\u63a5host\u673a\u7aef\u914d\u7f6e\u7684\u51fa\u9519\u7684MAC\u5730\u5740\u65f6\u53d1\u751f\u3002\u53c2\u770bRHEL bug #571991\u3002<\/p>\n
\n\u6211\u7684VM\u5ba2\u6237\u673a\u7684\u65f6\u95f4\u603b\u51fa\u9519\uff0c\u600e\u4e48\u529e\uff1f<\/h3>\n
\n\tMaemo docs<\/a> state that it's important to disable UTC and set the correct time zone, however I don't really see how that would help in case of diverging host\/guest clocks. IMHO much more useful and important is to configure properly working NTP server (chrony recommended, or ntpd) on both host and guest. The single most decisive trick IMHO is to specify the host NTP server as the main entry within guest VM instead of "foreign" NTP servers, to make sure to achieve the most precise coupling between these two related systems (timing drift vs. other systems does not matter nearly as much as a tight time precision for inner host\/guest system interaction e.g. in the case of NFS\/Samba shares etc.). For verification, see chronyc "sources -v", "tracking" ("System time" row) commands.
\n\tAfter having applied this very tight NTP coupling, this seems to finally have gotten rid of make's time drift warnings.
\n\tPerhaps qemu's -tdf (timing drift fix) option magically manages to help in your case, too.
\n\tSee also Faqs: I received a message about "clock skew"<\/a>.<\/p>\n
\n\u51fa\u73b0“rtc interrupts lost”\u51fa\u9519\u4fe1\u606f\uff0c\u800c\u4e14\u5ba2\u6237\u673a\u5e94\u8be5\u6162\uff0c\u600e\u4e48\u529e\uff1f<\/h3>\n
\n
\n\u6211\u8fd8\u5b89\u88c5\u4e86VMware\/Paralles\/VirtualBox\uff0c\u5f53\u6211\u6267\u884cmodprobe KVM\u65f6\uff0c\u7cfb\u7edf\u6b7b\u673a\u4e86\u3002<\/h3>\n
\nQEMU\/KVM\u5c4f\u5e55\u4e0a\u4ec0\u4e48\u90fd\u6ca1\u6709\uff0c\u4f46\u662f\u7cfb\u7edf\u6ca1\u6709\u6b7b\u673a\u3002\u6211\u6b63\u51c6\u5907\u5728\u5ba2\u6237\u673a\u4e0a\u5b89\u88c5Kubuntu\u3002\u600e\u4e48\u56de\u4e8b\uff1f<\/strong><\/h3>\n
\u8bd5\u8bd5\u7528 -std-vga \u9009\u9879\u52a0\u8f7dkvm\u3002\u5982\u679c\u5ba2\u6237\u64cd\u4f5c\u7cfb\u7edf\u4f7f\u7528framebuffer\u6a21\u5f0f\uff0c\u6bd4\u5982Kubuntu\/Ubuntu\u3002<\/pre>\n
\n\u5f53\u6211\u70b9\u51fb\u5ba2\u6237\u64cd\u4f5c\u7cfb\u7edf\u7684\u7a97\u53e3\u65f6\uff0c\u9f20\u7968\u5c31\u50cf\u88ab\u593a\u8d70\u4e00\u6837\u3002\u600e\u4e48\u505a\u624d\u80fd\u907f\u514d\u8fd9\u79cd\u60c5\u51b5\uff1f\u6709\u65f6\u9f20\u6807\u5728\u5ba2\u6237\u64cd\u4f5c\u7cfb\u7edf\u4e2d\u4e0d\u663e\u793a\uff0c\u6216\u8005\u4e0d\u52a8\uff0c\u600e\u4e48\u529e\uff1f<\/h3>\n