Drivers
為什麼我的 /proc/iomem 中的條目都是 00000000-00000000?
我的 /proc/iomem 中的 Etries 都是 00000000-00000000
/proc/ioports 也是如此。他們都是0000-0000
像:
00000000-00000000 : reserved 00000000-00000000 : System RAM 00000000-00000000 : reserved
我正在執行 4.10.3-1-ARCH x86_64
也歡迎任何關於如何自己找出原因的建議,謝謝。
嘗試
sudo
在你的命令前面使用,比如sudo less /proc/io{mem,ports}
該更新檔解釋了這種現象。
diff --git a/kernel/resource.c b/kernel/resource.c index 2e78ead..9b5f044 100644 --- a/kernel/resource.c +++ b/kernel/resource.c @@ -105,16 +105,25 @@ { struct resource *root = m->private; struct resource *r = v, *p; + unsigned long long start, end; int width = root->end < 0x10000 ? 4 : 8; int depth; for (depth = 0, p = r; depth < MAX_IORES_LEVEL; depth++, p = p->parent) if (p->parent == root) break; + + if (file_ns_capable(m->file, &init_user_ns, CAP_SYS_ADMIN)) { + start = r->start; + end = r->end; + } else { + start = end = 0; + } + seq_printf(m, "%*s%0*llx-%0*llx : %s\n", depth * 2, "", - width, (unsigned long long) r->start, - width, (unsigned long long) r->end, + width, start, + width, end, r->name ? r->name : "<BAD>"); return 0; }