{"id":35,"date":"2016-03-27T16:25:28","date_gmt":"2016-03-27T16:25:28","guid":{"rendered":"http:\/\/www.luoben.xyz\/?p=35"},"modified":"2019-01-19T04:46:36","modified_gmt":"2019-01-19T04:46:36","slug":"%e6%a2%b3%e7%90%86%e4%b8%80%e4%b8%8bept%e8%a1%a8%e9%a1%b9%e7%9a%84%e5%bb%ba%e7%ab%8b","status":"publish","type":"post","link":"http:\/\/www.luo666.com\/?p=35","title":{"rendered":"\u68b3\u7406\u4e00\u4e0bEPT\u8868\u9879\u7684\u5efa\u7acb"},"content":{"rendered":"
\n
EPT\u662f\u5bf9\u865a\u62df\u673a\u8bbf\u95ee\u5185\u5b58\u7684\u786c\u4ef6\u52a0\u901f\uff0c\u5176\u529f\u80fd\u548c\u5f71\u5b50\u9875\u8868\u4e00\u6837\uff0c\u5c31\u662f\u5efa\u7acbgpa\u5230hpa\u7684\u76f4\u63a5\u6620\u5c04\uff0c\u8bbf\u95eeEPT\u4e2d\u5df2\u7ecf\u5efa\u7acb\u597d\u6620\u5c04\u7684gpa\u5730\u5740\u4e0d\u89e6\u53d1vmexit\uff0c\u540c\u65f6\u4e5f\u53ea\u9700\u8981\u505a\u4e00\u6b21pagewalk\uff0c\u4f46\u662f\u7b2c\u4e00\u6b21\u8bbf\u95ee\u8fd8\u662f\u4f1avmexit\uff0c\u501f\u7740\u8fd9\u4e2a\u673a\u4f1a\u5728\u9000\u51fa\u5904\u7406\u51fd\u6570\u4e2d\u628a\u5bf9\u5e94\u7684EPT\u8868\u9879\u5efa\u7acb\u597d\uff0c\u8fd9\u4e2a\u9000\u51fa\u540d\u5b57\u53ebEPT_VIOLATION\uff0c\u5904\u7406\u51fd\u6570\u662fhandle_ept_violation\u3002<\/div>\n
\n
<\/div>\n
\n
handle_ept_violation\u51fd\u6570\u91cc\u9762\u6700\u7ec8\u8c03\u7528\u4e86tdp_page_fault\u6765\u4e3aEPT\u5efa\u7acb\u65b0\u7684entry\uff0c\u8fd9\u4e2a\u51fd\u6570\u5176\u5b9e\u590d\u7528\u4e86\u5f71\u5b50\u9875\u8868\u7684page_fault\u51fd\u6570nonpaging_page_fault\u5f88\u591a\u4ee3\u7801\uff08\u6211\u7684\u7406\u89e3\u662f\uff0cEPT\u548c\u5f71\u5b50\u9875\u8868\u90fd\u5b8c\u6210\u540c\u6837\u7684\u529f\u80fd\u53ea\u4e0d\u8fc7\u4e00\u4e2a\u662f\u786c\u4ef6\u6765\u67e5\u8868\u4e00\u4e2a\u662f\u8f6f\u4ef6\u67e5\u8868\uff0c\u4f46\u662f\u8868\u8fd8\u662f\u90a3\u5f20\u8868\uff09\uff0c\u5176\u4e2dvcpu->arch.mmu.root_hpa\u4fdd\u5b58\u4e86EPT\u8868\u7684\u57fa\u5730\u5740\u6216\u8005\u4fdd\u5b58\u5f71\u5b50\u9875\u8868\u57fa\u5730\u5740\u3002\u5b83\u8c03\u7528__direct_map\u6765\u5b8c\u6210entry\u7684\u5efa\u7acb\uff0c\u540e\u8005\u4f7f\u7528\u4e86\u5b8ffor_each_shadow_entry\u6765\u904d\u5386EPT\u8868\u9879\uff0c\u518d\u8c03\u7528mmu_set_spte\u6765\u771f\u6b63\u7684\u5b8c\u6210\u8868\u9879\u7684\u8bbe\u7f6e\u3002\u4e0a\u8ff0\u5b8ffor_each_shadow_entry\u957f\u8fd9\u6837\uff0c\u5b83\u7528\u5230\u4e86root_hpa\uff0c\u4ee5\u6b64\u4e3a\u6839\u57fa\u4e00\u5c42\u5c42\u7684\u904d\u5386addr\uff08gpa\uff09\u5bf9\u5e94\u7684entry\uff1a<\/div>\n<\/div>\n<\/div>\n
#define for_each_shadow_entry(_vcpu, _addr, _walker)\u00a0 \u00a0 \\<\/i><\/div>\n
\u00a0 \u00a0 for (shadow_walk_init(<\/b>&(_walker), _vcpu, _addr);\u00a0 \u00a0 \\<\/i><\/div>\n
\u00a0 \u00a0 \u00a0 \u00a0 \u00a0shadow_walk_okay(&(_walker));\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \\<\/i><\/div>\n
\u00a0 \u00a0 \u00a0 \u00a0 \u00a0shadow_walk_next(&(_walker)))<\/i><\/div>\n
\n
\u00a0<\/i><\/i><\/div>\n
mmu_set_spte\u5efa\u7acbentry\u7684\u65f6\u5019\uff0c\u8981\u5206\u60c5\u51b5\uff0c\u5bf9RAM\u548cMMIO\u8981\u533a\u522b\u5bf9\u5f85\uff0c\u6bd4\u5982\u5bf9qemu\u6a21\u62df\u7684\u8bbe\u5907mmio\u5f15\u53d1\u7684violation\uff0c\u5c31\u9700\u8981\u7279\u6b8a\u5904\u7406\uff1a<\/div>\n
\u5148\u5224\u65ad\u4e0d\u662fRAM\uff1ais_rmap_spte\uff0c\u5373\u76ee\u524d\u6ca1\u6709\u88ab\u6807\u8bb0\u4e3apresent\u7684spte\uff1b<\/span><\/div>\n
\u7136\u540eset_spte\u300bset_mmio_spte<\/div>\n
\u300bis_noslot_pfn\u8fd9\u91cc\u5224\u65ad\u8be5pfn\u662f\u5426\u5728memslot\u91cc\u9762\uff0c\u8fd9\u662f\u53e6\u5916\u4e00\u4e2a\u6545\u4e8b\u3002qemu\u4e3a\u865a\u62df\u673a\u51c6\u5907\u7684RAM\u90fd\u5728memslot\u91cc\u9762\uff0cmmio\u4e00\u822c\u4e0d\u5c5e\u4e8e\uff0c\u9664\u975e\u662f\u76f4\u901a\u8bbe\u5907\u7684\u60c5\u51b5\u3002\uff08\u6ce8\uff1a\u9488\u5bf9\u76f4\u901a\u8bbe\u5907\uff0cqemu\u8c03\u7528assigned_dev_register_regions \u8fd9\u4e2a\u51fd\u6570\u5904\u7406\u76f4\u901a\u8bbe\u5907\u7684mmio\u7a7a\u95f4\u548cpio\u7a7a\u95f4\uff0c\u5b83\u628a\u76f4\u901a\u8bbe\u5907\u7684mmio\u7a7a\u95f4\u901a\u8fc7sysfs\u6587\u4ef6\u505ammap\u5230qemu\u5730\u5740\u7a7a\u95f4\uff0c\u7136\u628a\u8fd9\u4e00\u6bb5hva\u5730\u5740\u505a\u6210\u4e00\u4e2aram\u7c7b\u578b\u7684\u65b0\u7684memory region\u7ed9\u6ce8\u518c\u7ed9\u865a\u62df\u673a\uff0c\u8ba9\u865a\u62df\u673a\u628a\u8fd9\u4e00\u6bb5\u5730\u5740\u5f53\u4f5c\u5185\u5b58\u6765\u5904\u7406\uff0c\u4e8e\u662f\u8fd9\u4e00\u6bb5\u5730\u5740\u4e5f\u5728memslot\u8303\u56f4\u5185\u3002\uff09<\/div>\n
\u300bmark_mmio_spte\uff0c\u8fd9\u91cc\u4e3a\u8be5spte\u6253\u4e0amask\uff1amask |= shadow_mmio_mask | access | gfn << PAGE_SHIFT;<\/div>\n
\u5f53\u4e0b\u6b21\u8bbf\u95ee\u8fd9\u4e2agfn\u65f6\uff0c\u53d1\u751fept violation\uff0chandle_ept_violation\u51fd\u6570\u8c03\u7528\uff1a<\/div>\n
handle_mmio_page_fault\u300bhandle_mmio_page_fault_common<\/div>\n
\u00a0 \u00a0 if (quickly_check_mmio_pf(vcpu, addr, direct))<\/i><\/div>\n
\u00a0 \u00a0 \u00a0 \u00a0 return RET_MMIO_PF_EMULATE;<\/i><\/div>\n
\u00a0<\/i><\/div>\n
\u00a0 \u00a0 spte = walk_shadow_page_get_mmio_spte(vcpu, addr);<\/i><\/div>\n
<\/div>\n
\u00a0 \u00a0 if (is_mmio_spte(spte)) {<\/i><\/div>\n
\u00a0 \u00a0 \u00a0 \u00a0 gfn_t gfn = get_mmio_spte_gfn(spte);<\/i><\/div>\n
\u00a0 \u00a0 \u00a0 \u00a0 unsigned access = get_mmio_spte_access(spte);<\/i><\/div>\n
\u00a0<\/i><\/div>\n
\u00a0 \u00a0 \u00a0 \u00a0 if (!check_mmio_spte(vcpu->kvm, spte))<\/i><\/div>\n
\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 return RET_MMIO_PF_INVALID;<\/i><\/div>\n
\u00a0<\/i><\/div>\n
\u00a0 \u00a0 \u00a0 \u00a0 if (direct)<\/i><\/div>\n
\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 addr = 0;<\/i><\/div>\n
\u00a0<\/i><\/div>\n
\u00a0 \u00a0 \u00a0 \u00a0 trace_handle_mmio_page_fault(addr, gfn, access);<\/i><\/div>\n
\u00a0 \u00a0 \u00a0 \u00a0 vcpu_cache_mmio_info(vcpu, addr, gfn, access);<\/i><\/div>\n
\u00a0 \u00a0 \u00a0 \u00a0 return RET_MMIO_PF_EMULATE;<\/i><\/div>\n<\/div>\n
\n
\u4eceis_mmio_spte \u5f00\u59cb\u770b\u8d77\uff0c\u9996\u5148\u5224\u65ad\u662f\u5426\u662fmmio\uff0c\u5982\u679c\u662f\u5219\u83b7\u53d6gfn\uff0c\u8bbf\u95ee\u6743\u9650\u7b49\u4fe1\u606f\uff0c\u4fdd\u5b58\u5230vcpu\u7ed3\u6784\u7684\u76f8\u5173\u57df\u4e2d\uff0c\u6700\u540e\u8fd4\u56de\uff0c\u8fd9\u4e2a\u8fd4\u56de\u6700\u7ec8\u4f1a\u5f15\u53d1\u91cd\u9000\u51fa\uff0c\u56de\u5230qemu\u4e2d\u6a21\u62df\u3002\u5f00\u59cb\u7684\u4e24\u884c\u662f\u4e00\u4e2a\u4f18\u5316\uff0c\u4e0a\u4e00\u6b21\u67e5\u8be2\u7ed3\u6784\u4fdd\u5b58\u5728\u4e0a\u9762\u8bf4\u7684vcpu\u7ed3\u6784\u4e2d\uff0c\u6240\u4ee5\u53ef\u4ee5\u5c1d\u8bd5\u4e00\u4e0b\uff0c\u4e07\u4e00\u5339\u914d\u4e86\u5462\uff01\u800c\u4e14\u524d\u540e\u8bbf\u95ee\u540c\u4e00\u4e2ammio\u7684gfn\u7684\u60c5\u51b5\u5e94\u8be5\u662f\u5f88\u666e\u904d\u7684\uff0c\u56e0\u4e3a\u914d\u7f6e\u8bbe\u5907\u5bc4\u5b58\u5668\u5f80\u5f80\u662f\u4e00\u7cfb\u5217\u7684\u52a8\u4f5c\u3002<\/div>\n
<\/div>\n
\n
\n
\u4e3a\u4e86\u6ee1\u8db3\u5f3a\u8feb\u75c7\u75c5\u4eba\u7684\u9700\u6c42\uff0c\u6211\u4eec\u518d\u770b\u4e00\u4e0b\u8fd9\u4e2atdp_page_fault\u662f\u4ece\u54ea\u91cc\u6765\u7684\uff1a<\/div>\n
handle_ept_violation\u300bkvm_mmu_page_fault\u300bvcpu->arch.mmu.page_fault\uff0c\u6700\u540e\u8fd9\u4e2a\u51fd\u6570\u662f\u4e0d\u540c\u67b6\u6784\u5728\u521d\u59cb\u5316\u7684\u65f6\u5019\u6ce8\u518c\u7684\uff0c\u62ffx86\u6765\u8bf4\u5177\u4f53\u5982\u4e0b\uff1a<\/div>\n
int kvm_mmu_create(struct kvm_vcpu *vcpu)<\/i><\/div>\n<\/div>\n<\/div>\n
{<\/i><\/div>\n
\u00a0 \u00a0 ASSERT(vcpu);<\/i><\/div>\n
\u00a0<\/i><\/div>\n
\u00a0 \u00a0\u00a0vcpu->arch.walk_mmu = &vcpu->arch.mmu;<\/b><\/i><\/div>\n
\u00a0 \u00a0 vcpu->arch.mmu.root_hpa = INVALID_PAGE;<\/i><\/div>\n
\u00a0 \u00a0 vcpu->arch.mmu.translate_gpa = translate_gpa;<\/i><\/div>\n
\u00a0 \u00a0 vcpu->arch.nested_mmu.translate_gpa = translate_nested_gpa;<\/i><\/div>\n
\u00a0<\/i><\/div>\n
\u00a0 \u00a0 return alloc_mmu_pages(vcpu);<\/i><\/div>\n
}<\/i><\/div>\n
\u4e0a\u8ff0\u51fd\u6570\u5728kvm_arch_vcpu_init\u91cc\u9762\u8c03\u7528\uff0c\u8fd9\u4e2a\u662f\u4eceqemu\u521d\u59cb\u5316vcpu\u53d1\u8d77\u7684\u52a8\u4f5c\uff0c\u5177\u4f53\u7684\uff1a<\/div>\n
kvm_vm_ioctl_create_vcpu\u300bkvm_arch_vcpu_create\u300bkvm_x86_ops->vcpu_create==vmx_create_vcpu\u300bkvm_vcpu_init\u300bkvm_arch_vcpu_init<\/div>\n
<\/div>\n
\u63a5\u4e0b\u6765\uff0c\u8fd9\u4e2a\u7cfb\u7edf\u8c03\u7528\u8fdb\u4e00\u6b65\u5bf9vcpu\u8fdb\u884c\u8bbe\u7f6e\uff1a\uff08tdp two-dimentional paging\uff09<\/div>\n
kvm_vm_ioctl_create_vcpu \u300bkvm_arch_vcpu_setup\u300bkvm_mmu_setup\u300binit_kvm_mmu\u300binit_kvm_tdp_mmu<\/div>\n
static int init_kvm_tdp_mmu(struct kvm_vcpu *vcpu)<\/i><\/div>\n
{<\/i><\/div>\n
\u00a0 \u00a0\u00a0struct kvm_mmu *context = vcpu->arch.walk_mmu;<\/b><\/i><\/div>\n
\u00a0<\/i><\/div>\n
\u00a0 \u00a0 context->base_role.word = 0;<\/i><\/div>\n
\u00a0 \u00a0 context->new_cr3 = nonpaging_new_cr3;<\/i><\/div>\n
\u00a0 \u00a0\u00a0context->page_fault = tdp_page_fault;<\/b><\/i><\/div>\n
<\/div>\n
\n
\u4e0a\u9762\u5176\u5b9e\u662f\u9488\u5bf9tdp_enabled==true\u573a\u666f\u6765\u5206\u6790\u7684\uff0c\u5982\u679c\u4e3afalse\uff0c\u5373\u6ca1\u6709EPT\u7b49\u786c\u4ef6\u7684\u652f\u6301\uff0c\u90a3\u4e48\u8981\u8d70\u53e6\u4e00\u6761\u8def\uff1a<\/div>\n
static void init_kvm_mmu(struct kvm_vcpu *vcpu)<\/i><\/div>\n
{<\/i><\/div>\n
\u00a0 \u00a0 if (mmu_is_nested(vcpu))<\/i><\/div>\n
\u00a0 \u00a0 \u00a0 \u00a0 return init_kvm_nested_mmu(vcpu);<\/i><\/div>\n
\u00a0 \u00a0 else if (tdp_enabled<\/b>)<\/i><\/div>\n
\u00a0 \u00a0 \u00a0 \u00a0 return init_kvm_tdp_mmu(vcpu);<\/i><\/div>\n
\u00a0 \u00a0 else<\/i><\/div>\n
\u00a0 \u00a0 \u00a0 \u00a0 return\u00a0init_kvm_softmmu<\/strong>(vcpu);<\/i><\/div>\n
}<\/i><\/div>\n
<\/div>\n
init_kvm_softmmu\u300bkvm_init_shadow_mmu\u300bnonpaging_init_context\u300bcontext->page_fault = nonpaging_page_fault;<\/div>\n
nonpaging_page_fault\u91cc\u9762\u540c\u6837\u8c03\u7528\u4e86handle_mmio_page_fault\uff0c\u4e5f\u901a\u8fc7\u8c03\u7528nonpaging_map\uff0c\u95f4\u63a5\u5730\u8c03\u7528\u4e86__direct_map\uff0c\u800ctdp_page_fault\u5c31\u662f\u7cc5\u5408\u4e86\u8fd9\u4e9b\u8c03\u7528\uff0c\u91cd\u5199\u4e86tdp\u7248\u672c\u7684page_fault\u5904\u7406\u51fd\u6570\u3002<\/div>\n<\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"

EPT\u662f\u5bf9\u865a\u62df\u673a\u8bbf\u95ee\u5185\u5b58\u7684\u786c\u4ef6\u52a0\u901f\uff0c\u5176\u529f\u80fd\u548c\u5f71\u5b50\u9875\u8868\u4e00\u6837\uff0c\u5c31\u662f\u5efa\u7acbgpa\u5230hpa\u7684\u76f4\u63a5\u6620\u5c04\uff0c\u8bbf\u95eeEPT\u4e2d\u5df2\u7ecf\u5efa\u7acb\u597d\u6620\u5c04\u7684gpa\u5730\u5740\u4e0d\u89e6\u53d1vmexit\uff0c\u540c\u65f6\u4e5f\u53ea\u9700\u8981\u505a\u4e00\u6b21pagewalk\uff0c\u4f46\u662f\u7b2c\u4e00\u6b21\u8bbf\u95ee\u8fd8\u662f\u4f1avmexit\uff0c\u501f\u7740\u8fd9\u4e2a\u673a\u4f1a\u5728\u9000\u51fa\u5904\u7406\u51fd\u6570\u4e2d\u628a\u5bf9\u5e94\u7684EPT\u8868\u9879\u5efa\u7acb\u597d\uff0c\u8fd9\u4e2a\u9000\u51fa\u540d\u5b57\u53ebEPT_VIOLATION\uff0c\u5904\u7406\u51fd\u6570\u662fhandle_ept_violation\u3002 handle_ept_violation\u51fd\u6570\u91cc\u9762\u6700\u7ec8\u8c03\u7528\u4e86tdp_page_fault\u6765\u4e3aEPT\u5efa\u7acb\u65b0\u7684entry\uff0c\u8fd9\u4e2a\u51fd\u6570\u5176\u5b9e\u590d\u7528\u4e86\u5f71\u5b50\u9875\u8868\u7684page_fault\u51fd\u6570nonpaging_page_fault\u5f88\u591a\u4ee3\u7801\uff08\u6211\u7684\u7406\u89e3\u662f\uff0cEPT\u548c\u5f71\u5b50\u9875\u8868\u90fd\u5b8c\u6210\u540c\u6837\u7684\u529f\u80fd\u53ea\u4e0d\u8fc7\u4e00\u4e2a\u662f\u786c\u4ef6\u6765\u67e5\u8868\u4e00\u4e2a\u662f\u8f6f\u4ef6\u67e5\u8868\uff0c\u4f46\u662f\u8868\u8fd8\u662f\u90a3\u5f20\u8868\uff09\uff0c\u5176\u4e2dvcpu->arch.mmu.root_hpa\u4fdd\u5b58\u4e86EPT\u8868\u7684\u57fa\u5730\u5740\u6216\u8005\u4fdd\u5b58\u5f71\u5b50\u9875\u8868\u57fa\u5730\u5740\u3002\u5b83\u8c03\u7528__direct_map\u6765\u5b8c\u6210entry\u7684\u5efa\u7acb\uff0c\u540e\u8005\u4f7f\u7528\u4e86\u5b8ffor_each_shadow_entry\u6765\u904d\u5386EPT\u8868\u9879\uff0c\u518d\u8c03\u7528mmu_set_spte\u6765\u771f\u6b63\u7684\u5b8c\u6210\u8868\u9879\u7684\u8bbe\u7f6e\u3002\u4e0a\u8ff0\u5b8ffor_each_shadow_entry\u957f\u8fd9\u6837\uff0c\u5b83\u7528\u5230\u4e86root_hpa\uff0c\u4ee5\u6b64\u4e3a\u6839\u57fa\u4e00\u5c42\u5c42\u7684\u904d\u5386addr\uff08gpa\uff09\u5bf9\u5e94\u7684entry\uff1a #define for_each_shadow_entry(_vcpu, _addr, _walker)\u00a0 \u00a0 \\ \u00a0 \u00a0 for (shadow_walk_init(&(_walker), _vcpu, _addr);\u00a0 \u00a0 \\ \u00a0 \u00a0 \u00a0 \u00a0 \u00a0shadow_walk_okay(&(_walker));\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \\ \u00a0 \u00a0 \u00a0 \u00a0 \u00a0shadow_walk_next(&(_walker))) \u00a0 mmu_set_spte\u5efa\u7acbentry\u7684\u65f6\u5019\uff0c\u8981\u5206\u60c5\u51b5\uff0c\u5bf9RAM\u548cMMIO\u8981\u533a\u522b\u5bf9\u5f85\uff0c\u6bd4\u5982\u5bf9qemu\u6a21\u62df\u7684\u8bbe\u5907mmio\u5f15\u53d1\u7684violation\uff0c\u5c31\u9700\u8981\u7279\u6b8a\u5904\u7406\uff1a \u5148\u5224\u65ad\u4e0d\u662fRAM\uff1ais_rmap_spte\uff0c\u5373\u76ee\u524d\u6ca1\u6709\u88ab\u6807\u8bb0\u4e3apresent\u7684spte\uff1b \u7136\u540eset_spte\u300bset_mmio_spte \u300bis_noslot_pfn\u8fd9\u91cc\u5224\u65ad\u8be5pfn\u662f\u5426\u5728memslot\u91cc\u9762\uff0c\u8fd9\u662f\u53e6\u5916\u4e00\u4e2a\u6545\u4e8b\u3002qemu\u4e3a\u865a\u62df\u673a\u51c6\u5907\u7684RAM\u90fd\u5728memslot\u91cc\u9762\uff0cmmio\u4e00\u822c\u4e0d\u5c5e\u4e8e\uff0c\u9664\u975e\u662f\u76f4\u901a\u8bbe\u5907\u7684\u60c5\u51b5\u3002\uff08\u6ce8\uff1a\u9488\u5bf9\u76f4\u901a\u8bbe\u5907\uff0cqemu\u8c03\u7528assigned_dev_register_regions \u8fd9\u4e2a\u51fd\u6570\u5904\u7406\u76f4\u901a\u8bbe\u5907\u7684mmio\u7a7a\u95f4\u548cpio\u7a7a\u95f4\uff0c\u5b83\u628a\u76f4\u901a\u8bbe\u5907\u7684mmio\u7a7a\u95f4\u901a\u8fc7sysfs\u6587\u4ef6\u505ammap\u5230qemu\u5730\u5740\u7a7a\u95f4\uff0c\u7136\u628a\u8fd9\u4e00\u6bb5hva\u5730\u5740\u505a\u6210\u4e00\u4e2aram\u7c7b\u578b\u7684\u65b0\u7684memory region\u7ed9\u6ce8\u518c\u7ed9\u865a\u62df\u673a\uff0c\u8ba9\u865a\u62df\u673a\u628a\u8fd9\u4e00\u6bb5\u5730\u5740\u5f53\u4f5c\u5185\u5b58\u6765\u5904\u7406\uff0c\u4e8e\u662f\u8fd9\u4e00\u6bb5\u5730\u5740\u4e5f\u5728memslot\u8303\u56f4\u5185\u3002\uff09 \u300bmark_mmio_spte\uff0c\u8fd9\u91cc\u4e3a\u8be5spte\u6253\u4e0amask\uff1amask |= shadow_mmio_mask | access | gfn << PAGE_SHIFT; \u5f53\u4e0b\u6b21\u8bbf\u95ee\u8fd9\u4e2agfn\u65f6\uff0c\u53d1\u751fept violation\uff0chandle_ept_violation\u51fd\u6570\u8c03\u7528\uff1a handle_mmio_page_fault\u300bhandle_mmio_page_fault_common \u00a0 \u00a0 if (quickly_check_mmio_pf(vcpu, … Continue reading “\u68b3\u7406\u4e00\u4e0bEPT\u8868\u9879\u7684\u5efa\u7acb”<\/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":false,"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-z","jetpack-related-posts":[],"_links":{"self":[{"href":"http:\/\/www.luo666.com\/index.php?rest_route=\/wp\/v2\/posts\/35"}],"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=35"}],"version-history":[{"count":9,"href":"http:\/\/www.luo666.com\/index.php?rest_route=\/wp\/v2\/posts\/35\/revisions"}],"predecessor-version":[{"id":44,"href":"http:\/\/www.luo666.com\/index.php?rest_route=\/wp\/v2\/posts\/35\/revisions\/44"}],"wp:attachment":[{"href":"http:\/\/www.luo666.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=35"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/www.luo666.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=35"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/www.luo666.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=35"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}