[PATCH v4 0/5] fw_cfg: add DMA operations & etc/vmcoreinfo support

From: Marc-Andrà Lureau
Date: Tue Oct 31 2017 - 11:20:01 EST


Hi,

This series adds DMA operations support to the qemu fw_cfg kernel
module and populates "etc/vmcoreinfo" with vmcoreinfo location
details.

Note: the support for this entry handling has been merged for next
qemu release (2.11)

v4:
- export paddr_vmcoreinfo_note() to fix fw_cfg.ko build
- fix build with !CONFIG_CRASH_CORE
- replace the unbounded yield() loop with a usleep_range() loop and a
200ms timeout
- do not write vmcoreinfo entry when running the kdump kernel (D. Hatayama)
- drop the experimental sysfs write support patch from this series

v3: (thanks kbuild)
- add "fw_cfg: fix the command line module name" patch
- fix build of "fw_cfg: add DMA register" with CONFIG_FW_CFG_SYSFS_CMDLINE=y
- fix 'Wshift-count-overflow'

v2:
- use platform device for dma mapping
- add etc/vmcoreinfo patch
- some code cleanups

Marc-Andrà Lureau (5):
fw_cfg: fix the command line module name
fw_cfg: add DMA register
fw_cfg: do DMA read operation
crash: export paddr_vmcoreinfo_note()
fw_cfg: write vmcoreinfo details

drivers/firmware/qemu_fw_cfg.c | 292 +++++++++++++++++++++++++++++++++++++----
kernel/crash_core.c | 1 +
2 files changed, 264 insertions(+), 29 deletions(-)

--
2.15.0.rc0.40.gaefcc5f6f