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| author |   Yunhong Jiang <yunhong.jiang@intel.com> | 2015-08-04 12:17:53 -0700 |
|---|---|---|
| committer | Yunhong Jiang <yunhong.jiang@intel.com> | 2015-08-04 15:44:42 -0700 |
| commit | 9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00 (patch) | |
| tree | 1c9cafbcd35f783a87880a10f85d1a060db1a563 /kernel/Documentation/block/cmdline-partition.txt | |
| parent | 98260f3884f4a202f9ca5eabed40b1354c489b29 (diff) | |
Add the rt linux 4.1.3-rt3 as base
Import the rt linux 4.1.3-rt3 as OPNFV kvm base.
It's from git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-4.1.y-rt and
the base is:
commit 0917f823c59692d751951bf5ea699a2d1e2f26a2
Author: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Date: Sat Jul 25 12:13:34 2015 +0200
Prepare v4.1.3-rt3
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
We lose all the git history this way and it's not good. We
should apply another opnfv project repo in future.
Change-Id: I87543d81c9df70d99c5001fbdf646b202c19f423
Signed-off-by: Yunhong Jiang <yunhong.jiang@intel.com>
Diffstat (limited to 'kernel/Documentation/block/cmdline-partition.txt')
| -rw-r--r-- | kernel/Documentation/block/cmdline-partition.txt | 39 |
1 files changed, 39 insertions, 0 deletions
diff --git a/kernel/Documentation/block/cmdline-partition.txt b/kernel/Documentation/block/cmdline-partition.txt new file mode 100644 index 000000000..525b9f6d7 --- /dev/null +++ b/kernel/Documentation/block/cmdline-partition.txt @@ -0,0 +1,39 @@ +Embedded device command line partition parsing +===================================================================== + +Support for reading the block device partition table from the command line. +It is typically used for fixed block (eMMC) embedded devices. +It has no MBR, so saves storage space. Bootloader can be easily accessed +by absolute address of data on the block device. +Users can easily change the partition. + +The format for the command line is just like mtdparts: + +blkdevparts=<blkdev-def>[;<blkdev-def>] + <blkdev-def> := <blkdev-id>:<partdef>[,<partdef>] + <partdef> := <size>[@<offset>](part-name) + +<blkdev-id> + block device disk name, embedded device used fixed block device, + it's disk name also fixed. such as: mmcblk0, mmcblk1, mmcblk0boot0. + +<size> + partition size, in bytes, such as: 512, 1m, 1G. + +<offset> + partition start address, in bytes. + +(part-name) + partition name, kernel send uevent with "PARTNAME". application can create + a link to block device partition with the name "PARTNAME". + user space application can access partition by partition name. + +Example: + eMMC disk name is "mmcblk0" and "mmcblk0boot0" + + bootargs: + 'blkdevparts=mmcblk0:1G(data0),1G(data1),-;mmcblk0boot0:1m(boot),-(kernel)' + + dmesg: + mmcblk0: p1(data0) p2(data1) p3() + mmcblk0boot0: p1(boot) p2(kernel) |