Hi, This series adds DMA operations support to the qemu fw_cfg kernel module and populates "etc/vmcoreinfo" with vmcoreinfo location details (since qemu 2.11).
v10: - merged Peter Xu fix "[PATCH] fw_cfg: don't use DMA mapping for fw_cfg device" (fixing fw-cfg+viommu configuration) - switch back to kalloc'd struct vmci, to fix DMA garbage operations - do not attempt to write vmcoreinfo if the entry exists but DMA isn't supported - removed a copy-pasta memset() on write operation error Marc-André Lureau (4): 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 | 267 ++++++++++++++++++++++++++++++++++++----- kernel/crash_core.c | 1 + 2 files changed, 236 insertions(+), 32 deletions(-) -- 2.16.0.rc1.1.gef27df75a1
