Hi, This series adds DMA operations support to the qemu fw_cfg kernel module and populates "etc/vmcoreinfo" with vmcoreinfo location details (entry added since qemu 2.11 with -device vmcoreinfo).
v13: - reorder patch series, introduce DMA write before DMA read - do some measurements of DMA read speed-ups v12: - fix virt_to_phys(NULL) panic with CONFIG_DEBUG_VIRTUAL=y - do not use DMA read, except for kmalloc() memory we allocated ourself (only fw_cfg_register_dir_entries() so far) v11: - add #include <linux/crash_core.h> in last patch, fixing kbuild .config test Marc-André Lureau (4): crash: export paddr_vmcoreinfo_note() fw_cfg: add DMA register fw_cfg: write vmcoreinfo details RFC: fw_cfg: do DMA read operation drivers/firmware/qemu_fw_cfg.c | 257 ++++++++++++++++++++++++++++++++++++----- kernel/crash_core.c | 1 + 2 files changed, 230 insertions(+), 28 deletions(-) -- 2.16.1.73.g5832b7e9f2
