On Mon, 20 May 2019 11:26:42 +0200, Takashi Iwai wrote: > > Hi, > > this is a patch set to add the support for loading compressed firmware > files. > > The primary motivation is to reduce the storage size; e.g. currently > the amount of /lib/firmware on my machine counts up to 419MB, and this > can be reduced to 130MB file compression. No bad deal. > > The feature adds only fallback to the compressed file, so it should > work as it was as long as the normal firmware file is present. The > f/w loader decompresses the content, so that there is no change needed > in the caller side. > > Currently only XZ format is supported. A caveat is that the kernel XZ > helper code supports only CRC32 (or none) integrity check type, so > you'll have to compress the files via xz -C crc32 option. > > The patch set begins with a few other improvements and refactoring, > followed by the compression support. > > In addition to this, dracut needs a small fix to deal with the *.xz > files. > > Also, the latest patchset is found in topic/fw-decompress branch of my > sound.git tree: > git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound.git > > > thanks, > > Takashi
Luis, any comments on the patchset? thanks, Takashi > > === > > Takashi Iwai (5): > firmware: Free temporary page table after vmapping > firmware: Unify the paged buffer release helper > firmware: Use kvmalloc for page tables > firmware: Factor out the paged buffer handling code > firmware: Add support for loading compressed files > > drivers/base/firmware_loader/Kconfig | 18 +++ > drivers/base/firmware_loader/fallback.c | 63 ++-------- > drivers/base/firmware_loader/firmware.h | 16 ++- > drivers/base/firmware_loader/main.c | 212 > +++++++++++++++++++++++++++++--- > 4 files changed, 235 insertions(+), 74 deletions(-) > > -- > 2.16.4 >
