{"id":356,"date":"2020-06-07T12:59:40","date_gmt":"2020-06-07T12:59:40","guid":{"rendered":"http:\/\/www.luo666.com\/?p=356"},"modified":"2023-08-27T08:41:51","modified_gmt":"2023-08-27T08:41:51","slug":"kvm-shared-msrs","status":"publish","type":"post","link":"http:\/\/www.luo666.com\/?p=356","title":{"rendered":"KVM shared MSRs"},"content":{"rendered":"<div>\n<div>\n<p>\u6709\u4e9bmsr\u5bc4\u5b58\u5668\u5728\u7528\u6237\u6001\u624d\u6709\u53ef\u80fd\u8bbf\u95ee\uff0c\u5185\u6838\u6001\u4e0d\u4f1a\u8bbf\u95ee\uff0c\u90a3\u4e48\u6211\u4eecvmexit\u7684\u65f6\u5019\u662f\u4e0d\u9700\u8981\u5207\u6362\u5230host\u503c\u7684\uff0c\u800c\u4e14vmcs\u91cc\u9762\u6ca1\u6709\u4fdd\u5b58\u76f8\u5e94\u7684\u5bc4\u5b58\u5668\u503c\uff0c\u53ea\u5728vcpu\u9700\u8981\u8fd4\u56de\u5230\u7528\u6237\u6001\u7684\u65f6\u5019\u624d\u628a\u8fd9\u4e9bmsr\u7684\u503c\u4fdd\u5b58\u5230shared_msrs\u91cc\u9762\uff0c\u540c\u65f6\u5207\u6362\u5230host\u4e4b\u524d\u4fdd\u5b58\u7684\u503c\u3002avi\u5927\u795e\u7684patch\u89e3\u91ca\u4e86\u8fd9\u79cd\u53ef\u4ee5\u4e0d\u7528\u5728\u5185\u6838\u6001\u5207\u6362\u7684\u5bc4\u5b58\u5668\u7684\u4f18\u5316\u601d\u8def\uff1ahttps:\/\/lore.kernel.org\/patchwork\/cover\/170941\/<\/p>\n<p>VMCS\u672c\u8eab\u53ea\u5bf9\u5f88\u5c11\u7684\u4e00\u4e9bMSR\u5bc4\u5b58\u5668\u8fdb\u884c\u5207\u6362\uff0c\u6240\u4ee5\u539f\u6765\u5927\u90e8\u5206MSR\u7684\u5207\u6362\u662f\u4f9d\u8d56\u8f6f\u4ef6\u8fdb\u884c\u7684\uff0c\u8f6f\u4ef6\u5207\u6362\u7684\u5f00\u9500\u5f88\u5927\uff0c\u4e0a\u8ff0patch\u5219\u662f\u5bf9\u6b64\u7684\u4f18\u5316\u3002<\/p>\n<\/div>\n<div>\u8fd9\u4e9b\u5bc4\u5b58\u5668\u4e00\u5b9a\u4e0d\u4f1a\u5728\u5185\u6838\u6001\u88ab\u8bbf\u95ee\u5417\uff1fKVM\u6a21\u5757\u80fd\u4fdd\u8bc1\u81ea\u5df1\u4e0d\u53bb\u8bbf\u95ee\uff0c\u4f46\u662f\u5982\u4f55\u4fdd\u8bc1\u5728\u5185\u6838\u5f00\u62a2\u5360\u7684\u60c5\u51b5\u4e0b\uff0c\u5176\u4ed6\u5185\u6838\u4ee3\u7801\u4e0d\u4f1a\u8bbf\u95ee\u8fd9\u4e9b\u5bc4\u5b58\u5668\u5462\uff1fAMD\u7684svm\u91cc\u9762\u6bd4\u8f83\u8bda\u5b9e\u7684\u63d0\u51fa\u4e86\u8fd9\u79cd\u62c5\u5fc3\uff0c\u4fa7\u9762\u4f50\u8bc1\u4e86\u8fd9\u786e\u5b9e\u662f\u4e2a\u9690\u60a3\uff0c\u9700\u8981\u5f00\u53d1\u8005\u5fc3\u4e2d\u6709\u6570\uff1a<\/div>\n<div>\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"c\" data-enlighter-theme=\"droide\" data-enlighter-linenumbers=\"false\">svm_vcpu_load\uff1a\n\n    \/* This assumes that the kernel never uses MSR_TSC_AUX *\/\n    if (static_cpu_has(X86_FEATURE_RDTSCP))\n        wrmsrl(MSR_TSC_AUX, svm-&gt;tsc_aux);<\/pre>\n<\/div>\n<div>shared_msrs\u91cc\u9762host\u503c\u6765\u81ea\u4e8evcpu_enter_guest\u8c03\u7528kvm_x86_ops-&gt;prepare_guest_switch(vcpu)\u7684\u65f6\u5019\u4fdd\u5b58\u7684\u503c\u3002<\/div>\n<div><\/div>\n<div>vcpu\u8fd4\u56de\u7528\u6237\u6001\u5207\u6362\u7684\u8fc7\u7a0b\u662f\u8c03\u7528kvm_on_user_return\u51fd\u6570\uff0c\u800c\u8fd9\u4e2a\u51fd\u6570\u4e5f\u5c31\u662f\u5728kvm_x86_ops-&gt;prepare_guest_switch(vcpu)\u7684\u65f6\u5019\u8c03\u7528kvm_set_shared_msr\u914d\u7f6e\u7684\uff0c\u540e\u8005\u8c03\u7528\u4e86\u5185\u6838\u51fd\u6570\uff1auser_return_notifier_register(&amp;smsr-&gt;urn); \u8fd9\u4e2a\u51fd\u6570\u662f\u5185\u6838\u63d0\u4f9b\u7684\u8fd4\u56de\u7528\u6237\u6001\u65f6\u523b\u7684\u901a\u77e5\u94fe\u63a5\u53e3\uff0ckvm\u7528\u5b83\u6765\u7ed9vcpu\u8fd4\u56de\u6302\u4e86\u4e2a\u94a9\u5b50\uff0c\u5982\u6b64\u5b9e\u73b0\u4e86vcpu ioctl\u7cfb\u7edf\u8c03\u7528\u8fd4\u56deqemu\u65f6\u5c06shared_msrs\u5207\u6362\u56dehost\u4e4b\u524d\u4fdd\u5b58\u7684\u503c\u3002<\/div>\n<div><\/div>\n<div>kvm_on_user_return\u5c31\u662f\u6ce8\u518c\u5230\u5185\u6838\u7684vcpu\u8fd4\u56de\u7528\u6237\u6001\u65f6\u6267\u884c\u7684\u903b\u8f91\uff0c\u5728\u5207\u6362shared_msrs\u7684\u540c\u65f6\u4e5f\u628a\u81ea\u5df1\u4ece\u901a\u77e5\u94fe\u4e0a\u6ce8\u9500\u4e86\uff0c\u56e0\u4e3a\u4e00\u65b9\u9762\u4e0d\u9700\u8981\u522b\u7684\u8fdb\u7a0b\u5728\u9000\u51fa\u7684\u65f6\u5019\u4e5f\u6267\u884c\u8fd9\u4e2a\u51fd\u6570\u53e6\u4e00\u65b9\u9762\u5728vcpu enter guest\u7684\u65f6\u5019\u8fd8\u4f1a\u518d\u6ce8\u518c\u7684\u3002<\/div>\n<div>\n<hr \/>\n<\/div>\n<h1>MSR\u4eceHOST\u5207\u6362\u5230GUEST<\/h1>\n<div>\u8be5\u8fc7\u7a0b\u53d1\u751f\u5728vmentry\u65f6\uff0c\u6700\u540e\u8c03\u7528\u94fe\u5982\u4e0b\uff1a<\/div>\n<div>vcpu_enter_guest<\/div>\n<div>\u00a0\u00a0 \u00a0kvm_x86_ops-&gt;prepare_guest_switch(vcpu) ==&gt;\u00a0vmx_save_host_state<\/div>\n<div>\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0kvm_set_shared_msr(vmx-&gt;guest_msrs[i].index,\u00a0vmx-&gt;guest_msrs[i].data,\u00a0vmx-&gt;guest_msrs[i].mask)<\/div>\n<div><\/div>\n<div>\u4ecehost\u5207\u5230guest\uff0cguest\u7684msr\u503c\u4ecevmx-&gt;guest_msrs[i].data\u8fd9\u91cc\u6765<\/div>\n<div>vmx-&gt;guest_msrs\u5728vmx_get_msr\u65f6\u88ab\u8bfb\u53d6\uff0cvmx_set_msr\u65f6\u88ab\u66f4\u6539\uff0cvmx_get\/set_msr\u4e00\u822c\u5728handle_rdmsr\/wrmsr\u4ee5\u53ca\u70ed\u8fc1\u79fb\u524d\u540e\u505asave load msrs\u65f6\u88abqemu\u89e6\u53d1\u8c03\u7528\u3002vmx_set_msr\u91cc\u9762\u540c\u6837\u4f1a\u8c03\u7528kvm_set_shared_msr\uff0c\u8fd9\u91cc\u5176\u5b9e\u66f4\u591a\u662f\u4e3a\u4e86\u8bd5\u4e00\u4e0b\u662f\u5426\u53ef\u4ee5\u8bbe\u7f6e\u6210\u529f\uff0c\u5982\u679c\u8bbe\u7f6e\u4e0d\u6210\u529f\u90a3\u4e48\u8981\u8ba9vmx-&gt;guest_msrs\u91cc\u9762\u76f8\u5e94\u7684msr\u503c\u4fdd\u6301\u539f\u6765\u7684\u8bbe\u7f6e\u800c\u4e0d\u53bb\u66f4\u65b0\uff0c\u56e0\u4e3a\u53ef\u80fd\u65b0\u8bbe\u7f6e\u7684\u662f\u4e2a\u975e\u6cd5\u7684\u503c\u3002\u5b9e\u9645\u4e0avmx_set_msr\u53ea\u9700\u8981\u66f4\u65b0guest_msrs\u5c31\u53ef\u4ee5\u4e86\uff0c\u56e0\u4e3avmentry\u7684\u65f6\u5019\u8fd8\u662f\u4f1a\u4eceguest_msrs\u91cc\u9762\u8bfb\u53d6\u518dkvm_set_shared_msr\u3002<\/div>\n<div>\n<hr \/>\n<\/div>\n<h1>MSR\u4eceGUEST\u5207\u6362\u5230HOST<\/h1>\n<div>vmexit\u65f6\u5e76\u4e0d\u4f1a\u5207share_msrs\u6d89\u53ca\u5230\u7684msr\uff0c\u800c\u662f\u53d1\u751f\u5728vcpu\u8981\u8fd4\u56deuser mode\u4e4b\u9645\uff0c\u5185\u6838\u8c03\u7528\u524d\u9762\u6ce8\u518c\u7684\u901a\u77e5\u51fd\u6570\uff0c\u8c03\u7528\u94fe\u5982\u4e0b\uff1a<\/div>\n<div>prepare_exit_to_usermode<\/div>\n<div>\u00a0\u00a0 \u00a0exit_to_usermode_loop<\/div>\n<div>\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0fire_user_return_notifiers<\/div>\n<div>\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0urn-&gt;on_user_return(urn) ==&gt;\u00a0kvm_on_user_return \u627e\u5230\u5bf9\u5e94\u7684shared_msrs\u5e76\u6062\u590d\u5230vmentry\u524d\u7684host\u503c<\/div>\n<div>\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"c\" data-enlighter-theme=\"droide\" data-enlighter-linenumbers=\"false\">static void kvm_on_user_return(struct user_return_notifier *urn)\n{\n\u00a0\u00a0\u00a0\u00a0unsigned slot;\n\u00a0\u00a0\u00a0\u00a0struct kvm_shared_msrs *locals\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0= container_of(urn, struct kvm_shared_msrs, urn);\n\u00a0\u00a0\u00a0\u00a0struct kvm_shared_msr_values *values;\n\u00a0\u00a0\u00a0\u00a0unsigned long flags;\n\n\u00a0\u00a0\u00a0\u00a0\/*\n\u00a0\u00a0\u00a0\u00a0\u00a0* Disabling irqs at this point since the following code could be\n\u00a0\u00a0\u00a0\u00a0\u00a0* interrupted and executed through kvm_arch_hardware_disable()\n\u00a0\u00a0\u00a0\u00a0\u00a0*\/\n\u00a0\u00a0\u00a0\u00a0local_irq_save(flags);\n\u00a0\u00a0\u00a0\u00a0if (locals-&gt;registered) {\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0locals-&gt;registered = false;\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0user_return_notifier_unregister(urn);\n\u00a0\u00a0\u00a0\u00a0}\n\u00a0\u00a0\u00a0\u00a0local_irq_restore(flags);\n\u00a0\u00a0\u00a0\u00a0for (slot = 0; slot &lt; shared_msrs_global.nr; ++slot) {\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0values = &amp;locals-&gt;values[slot];\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0if (values-&gt;host != values-&gt;curr) {\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0wrmsrl(shared_msrs_global.msrs[slot], values-&gt;host);\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0values-&gt;curr = values-&gt;host;\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0}\n\u00a0\u00a0\u00a0\u00a0}\n}<\/pre>\n<p>&nbsp;<\/p>\n<\/div>\n<\/div>\n<p><audio style=\"display: none;\" controls=\"controls\"><\/audio><\/p>\n<p><audio style=\"display: none;\" controls=\"controls\"><\/audio><\/p>\n<p><audio style=\"display: none;\" controls=\"controls\"><\/audio><\/p>\n<p><audio style=\"display: none;\" controls=\"controls\"><\/audio><\/p>\n<p><audio style=\"display: none;\" controls=\"controls\"><\/audio><\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u6709\u4e9bmsr\u5bc4\u5b58\u5668\u5728\u7528\u6237\u6001\u624d\u6709\u53ef\u80fd\u8bbf\u95ee\uff0c\u5185\u6838\u6001\u4e0d\u4f1a\u8bbf\u95ee\uff0c\u90a3\u4e48\u6211\u4eecvmexit\u7684\u65f6\u5019\u662f\u4e0d\u9700\u8981\u5207\u6362\u5230host\u503c\u7684\uff0c\u800c\u4e14vmcs\u91cc\u9762\u6ca1\u6709\u4fdd\u5b58\u76f8\u5e94\u7684\u5bc4\u5b58\u5668\u503c\uff0c\u53ea\u5728vcpu\u9700\u8981\u8fd4\u56de\u5230\u7528\u6237\u6001\u7684\u65f6\u5019\u624d\u628a\u8fd9\u4e9bmsr\u7684\u503c\u4fdd\u5b58\u5230shared_msrs\u91cc\u9762\uff0c\u540c\u65f6\u5207\u6362\u5230host\u4e4b\u524d\u4fdd\u5b58\u7684\u503c\u3002avi\u5927\u795e\u7684patch\u89e3\u91ca\u4e86\u8fd9\u79cd\u53ef\u4ee5\u4e0d\u7528\u5728\u5185\u6838\u6001\u5207\u6362\u7684\u5bc4\u5b58\u5668\u7684\u4f18\u5316\u601d\u8def\uff1ahttps:\/\/lore.kernel.org\/patchwork\/cover\/170941\/ VMCS\u672c\u8eab\u53ea\u5bf9\u5f88\u5c11\u7684\u4e00\u4e9bMSR\u5bc4\u5b58\u5668\u8fdb\u884c\u5207\u6362\uff0c\u6240\u4ee5\u539f\u6765\u5927\u90e8\u5206MSR\u7684\u5207\u6362\u662f\u4f9d\u8d56\u8f6f\u4ef6\u8fdb\u884c\u7684\uff0c\u8f6f\u4ef6\u5207\u6362\u7684\u5f00\u9500\u5f88\u5927\uff0c\u4e0a\u8ff0patch\u5219\u662f\u5bf9\u6b64\u7684\u4f18\u5316\u3002 \u8fd9\u4e9b\u5bc4\u5b58\u5668\u4e00\u5b9a\u4e0d\u4f1a\u5728\u5185\u6838\u6001\u88ab\u8bbf\u95ee\u5417\uff1fKVM\u6a21\u5757\u80fd\u4fdd\u8bc1\u81ea\u5df1\u4e0d\u53bb\u8bbf\u95ee\uff0c\u4f46\u662f\u5982\u4f55\u4fdd\u8bc1\u5728\u5185\u6838\u5f00\u62a2\u5360\u7684\u60c5\u51b5\u4e0b\uff0c\u5176\u4ed6\u5185\u6838\u4ee3\u7801\u4e0d\u4f1a\u8bbf\u95ee\u8fd9\u4e9b\u5bc4\u5b58\u5668\u5462\uff1fAMD\u7684svm\u91cc\u9762\u6bd4\u8f83\u8bda\u5b9e\u7684\u63d0\u51fa\u4e86\u8fd9\u79cd\u62c5\u5fc3\uff0c\u4fa7\u9762\u4f50\u8bc1\u4e86\u8fd9\u786e\u5b9e\u662f\u4e2a\u9690\u60a3\uff0c\u9700\u8981\u5f00\u53d1\u8005\u5fc3\u4e2d\u6709\u6570\uff1a svm_vcpu_load\uff1a \/* This assumes that the kernel never uses MSR_TSC_AUX *\/ if (static_cpu_has(X86_FEATURE_RDTSCP)) wrmsrl(MSR_TSC_AUX, svm-&gt;tsc_aux); shared_msrs\u91cc\u9762host\u503c\u6765\u81ea\u4e8evcpu_enter_guest\u8c03\u7528kvm_x86_ops-&gt;prepare_guest_switch(vcpu)\u7684\u65f6\u5019\u4fdd\u5b58\u7684\u503c\u3002 vcpu\u8fd4\u56de\u7528\u6237\u6001\u5207\u6362\u7684\u8fc7\u7a0b\u662f\u8c03\u7528kvm_on_user_return\u51fd\u6570\uff0c\u800c\u8fd9\u4e2a\u51fd\u6570\u4e5f\u5c31\u662f\u5728kvm_x86_ops-&gt;prepare_guest_switch(vcpu)\u7684\u65f6\u5019\u8c03\u7528kvm_set_shared_msr\u914d\u7f6e\u7684\uff0c\u540e\u8005\u8c03\u7528\u4e86\u5185\u6838\u51fd\u6570\uff1auser_return_notifier_register(&amp;smsr-&gt;urn); \u8fd9\u4e2a\u51fd\u6570\u662f\u5185\u6838\u63d0\u4f9b\u7684\u8fd4\u56de\u7528\u6237\u6001\u65f6\u523b\u7684\u901a\u77e5\u94fe\u63a5\u53e3\uff0ckvm\u7528\u5b83\u6765\u7ed9vcpu\u8fd4\u56de\u6302\u4e86\u4e2a\u94a9\u5b50\uff0c\u5982\u6b64\u5b9e\u73b0\u4e86vcpu ioctl\u7cfb\u7edf\u8c03\u7528\u8fd4\u56deqemu\u65f6\u5c06shared_msrs\u5207\u6362\u56dehost\u4e4b\u524d\u4fdd\u5b58\u7684\u503c\u3002 kvm_on_user_return\u5c31\u662f\u6ce8\u518c\u5230\u5185\u6838\u7684vcpu\u8fd4\u56de\u7528\u6237\u6001\u65f6\u6267\u884c\u7684\u903b\u8f91\uff0c\u5728\u5207\u6362shared_msrs\u7684\u540c\u65f6\u4e5f\u628a\u81ea\u5df1\u4ece\u901a\u77e5\u94fe\u4e0a\u6ce8\u9500\u4e86\uff0c\u56e0\u4e3a\u4e00\u65b9\u9762\u4e0d\u9700\u8981\u522b\u7684\u8fdb\u7a0b\u5728\u9000\u51fa\u7684\u65f6\u5019\u4e5f\u6267\u884c\u8fd9\u4e2a\u51fd\u6570\u53e6\u4e00\u65b9\u9762\u5728vcpu enter guest\u7684\u65f6\u5019\u8fd8\u4f1a\u518d\u6ce8\u518c\u7684\u3002 MSR\u4eceHOST\u5207\u6362\u5230GUEST \u8be5\u8fc7\u7a0b\u53d1\u751f\u5728vmentry\u65f6\uff0c\u6700\u540e\u8c03\u7528\u94fe\u5982\u4e0b\uff1a vcpu_enter_guest \u00a0\u00a0 \u00a0kvm_x86_ops-&gt;prepare_guest_switch(vcpu) ==&gt;\u00a0vmx_save_host_state \u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0kvm_set_shared_msr(vmx-&gt;guest_msrs[i].index,\u00a0vmx-&gt;guest_msrs[i].data,\u00a0vmx-&gt;guest_msrs[i].mask) \u4ecehost\u5207\u5230guest\uff0cguest\u7684msr\u503c\u4ecevmx-&gt;guest_msrs[i].data\u8fd9\u91cc\u6765 vmx-&gt;guest_msrs\u5728vmx_get_msr\u65f6\u88ab\u8bfb\u53d6\uff0cvmx_set_msr\u65f6\u88ab\u66f4\u6539\uff0cvmx_get\/set_msr\u4e00\u822c\u5728handle_rdmsr\/wrmsr\u4ee5\u53ca\u70ed\u8fc1\u79fb\u524d\u540e\u505asave load msrs\u65f6\u88abqemu\u89e6\u53d1\u8c03\u7528\u3002vmx_set_msr\u91cc\u9762\u540c\u6837\u4f1a\u8c03\u7528kvm_set_shared_msr\uff0c\u8fd9\u91cc\u5176\u5b9e\u66f4\u591a\u662f\u4e3a\u4e86\u8bd5\u4e00\u4e0b\u662f\u5426\u53ef\u4ee5\u8bbe\u7f6e\u6210\u529f\uff0c\u5982\u679c\u8bbe\u7f6e\u4e0d\u6210\u529f\u90a3\u4e48\u8981\u8ba9vmx-&gt;guest_msrs\u91cc\u9762\u76f8\u5e94\u7684msr\u503c\u4fdd\u6301\u539f\u6765\u7684\u8bbe\u7f6e\u800c\u4e0d\u53bb\u66f4\u65b0\uff0c\u56e0\u4e3a\u53ef\u80fd\u65b0\u8bbe\u7f6e\u7684\u662f\u4e2a\u975e\u6cd5\u7684\u503c\u3002\u5b9e\u9645\u4e0avmx_set_msr\u53ea\u9700\u8981\u66f4\u65b0guest_msrs\u5c31\u53ef\u4ee5\u4e86\uff0c\u56e0\u4e3avmentry\u7684\u65f6\u5019\u8fd8\u662f\u4f1a\u4eceguest_msrs\u91cc\u9762\u8bfb\u53d6\u518dkvm_set_shared_msr\u3002 MSR\u4eceGUEST\u5207\u6362\u5230HOST vmexit\u65f6\u5e76\u4e0d\u4f1a\u5207share_msrs\u6d89\u53ca\u5230\u7684msr\uff0c\u800c\u662f\u53d1\u751f\u5728vcpu\u8981\u8fd4\u56deuser mode\u4e4b\u9645\uff0c\u5185\u6838\u8c03\u7528\u524d\u9762\u6ce8\u518c\u7684\u901a\u77e5\u51fd\u6570\uff0c\u8c03\u7528\u94fe\u5982\u4e0b\uff1a prepare_exit_to_usermode \u00a0\u00a0 \u00a0exit_to_usermode_loop \u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0fire_user_return_notifiers \u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0urn-&gt;on_user_return(urn) ==&gt;\u00a0kvm_on_user_return \u627e\u5230\u5bf9\u5e94\u7684shared_msrs\u5e76\u6062\u590d\u5230vmentry\u524d\u7684host\u503c static void &hellip; <a href=\"http:\/\/www.luo666.com\/?p=356\" class=\"more-link\">Continue reading<span class=\"screen-reader-text\"> &#8220;KVM shared MSRs&#8221;<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"jetpack_post_was_ever_published":false,"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"footnotes":"","_jetpack_memberships_contains_paid_content":false,"jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":true,"jetpack_social_options":{"image_generator_settings":{"template":"highway","enabled":false}}},"categories":[3],"tags":[],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"","jetpack_sharing_enabled":true,"jetpack_shortlink":"https:\/\/wp.me\/p7Dhki-5K","jetpack-related-posts":[],"_links":{"self":[{"href":"http:\/\/www.luo666.com\/index.php?rest_route=\/wp\/v2\/posts\/356"}],"collection":[{"href":"http:\/\/www.luo666.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/www.luo666.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/www.luo666.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/www.luo666.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=356"}],"version-history":[{"count":8,"href":"http:\/\/www.luo666.com\/index.php?rest_route=\/wp\/v2\/posts\/356\/revisions"}],"predecessor-version":[{"id":387,"href":"http:\/\/www.luo666.com\/index.php?rest_route=\/wp\/v2\/posts\/356\/revisions\/387"}],"wp:attachment":[{"href":"http:\/\/www.luo666.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=356"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/www.luo666.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=356"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/www.luo666.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=356"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}