mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-12-18 00:24:58 +08:00
54a19b4d3f
There are some ABI documents that, while they don't generate any warnings, they have issues when parsed by get_abi.pl script on its output result. Address them, in order to provide a clean output. Reviewed-by: Tom Rix <trix@redhat.com> # for fpga-manager Reviewed-By: Kajol Jain<kjain@linux.ibm.com> # for sysfs-bus-event_source-devices-hv_gpci and sysfs-bus-event_source-devices-hv_24x7 Acked-by: Jonathan Cameron <Jonathan.Cameron@huawei.com> #for IIO Acked-by: Oded Gabbay <oded.gabbay@gmail.com> # for Habanalabs Acked-by: Vaibhav Jain <vaibhav@linux.ibm.com> # for sysfs-bus-papr-pmem Acked-by: Cezary Rojewski <cezary.rojewski@intel.com> # for catpt Acked-by: Suzuki K Poulose <suzuki.poulose@arm.com> Acked-by: Ilya Dryomov <idryomov@gmail.com> # for rbd Acked-by: Jonathan Corbet <corbet@lwn.net> Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org> Link: https://lore.kernel.org/r/5bc78e5b68ed1e9e39135173857cb2e753be868f.1604042072.git.mchehab+huawei@kernel.org Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
37 lines
1.3 KiB
Plaintext
37 lines
1.3 KiB
Plaintext
What: /sys/firmware/efi/runtime-map/
|
|
Date: December 2013
|
|
Contact: Dave Young <dyoung@redhat.com>
|
|
Description: Switching efi runtime services to virtual mode requires
|
|
that all efi memory ranges which have the runtime attribute
|
|
bit set to be mapped to virtual addresses.
|
|
|
|
The efi runtime services can only be switched to virtual
|
|
mode once without rebooting. The kexec kernel must maintain
|
|
the same physical to virtual address mappings as the first
|
|
kernel. The mappings are exported to sysfs so userspace tools
|
|
can reassemble them and pass them into the kexec kernel.
|
|
|
|
/sys/firmware/efi/runtime-map/ is the directory the kernel
|
|
exports that information in.
|
|
|
|
subdirectories are named with the number of the memory range::
|
|
|
|
/sys/firmware/efi/runtime-map/0
|
|
/sys/firmware/efi/runtime-map/1
|
|
/sys/firmware/efi/runtime-map/2
|
|
/sys/firmware/efi/runtime-map/3
|
|
...
|
|
|
|
Each subdirectory contains five files:
|
|
|
|
========= =========================================
|
|
attribute The attributes of the memory range.
|
|
num_pages The size of the memory range in pages.
|
|
phys_addr The physical address of the memory range.
|
|
type The type of the memory range.
|
|
virt_addr The virtual address of the memory range.
|
|
========= =========================================
|
|
|
|
Above values are all hexadecimal numbers with the '0x' prefix.
|
|
Users: Kexec
|