Build.md

@@ -141,6 +141,12 @@ If you are using cgroups and access is not allowed although you tried all the st
 **Update for Linux kernel 5.9 and newer:**
 With Linux 5.9, the `msr` kernel module got some security fixes. The major change for LIKWID is, that now all MSR are non-writable by default. In order to change that, you have to change the boot options of your operating system to contain `msr.allow_writes=on` to enable writes again. This affects only `ACCESSMODE=direct` and `ACCESSMODE=accessdaemon`. If you use the `perf_event` backend, you don't have to change anything.
 
+**Update for Linux kernel 5.10 and newer:**
+We got [reports](https://github.com/RRZE-HPC/likwid/issues/412), that with Linux 5.10 the PCI accesses are also restricted by security mechanisms. In order to fix this, the access daemon requires an additinal capabilities flag:
+```
+sudo setcap cap_sys_admin,cap_sys_rawio=ep EXECUTABLE
+```
+
 
 # Installation on Intel Xeon Phi (KNC)