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Subject[PATCH v2 0/4] fw_cfg: add DMA operations & etc/vmcoreinfo support
From: Marc-André Lureau <>


This series brings DMA operations support to the fw_cfg kernel module
and provide "etc/vmcoreinfo" support.

At the current iteration of "[Qemu-devel] [PATCH v6 0/7] KASLR kernel
dump support" patch series, a "etc/vmcoreinfo" entry is added with
qemu -device vmcoreinfo, where the guest during boot or later, can
write the addr/size location of a ELF note to be appended in the qemu

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

Marc-André Lureau (4):
fw_cfg: add DMA register
fw_cfg: do DMA read operation
fw_cfg: write vmcoreinfo details
RFC: fw_cfg: add DMA write operation in sysfs

drivers/firmware/qemu_fw_cfg.c | 284 ++++++++++++++++++++++++++++++++++++-----
1 file changed, 254 insertions(+), 30 deletions(-)


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