linux-kernel - [PATCH v10 0/4] fw_cfg: add DMA operations & etc/vmcoreinfo support

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Message-Id: <20180123164041.30339-1-marcandre.lureau@redhat.com>
Date:   Tue, 23 Jan 2018 17:40:37 +0100
From:   Marc-André Lureau <marcandre.lureau@...hat.com>
To:     linux-kernel@...r.kernel.org
Cc:     bhe@...hat.com, slp@...hat.com, mst@...hat.com, somlo@....edu,
        xiaolong.ye@...el.com, peterx@...hat.com, qemu-devel@...gnu.org,
        Marc-André Lureau <marcandre.lureau@...hat.com>
Subject: [PATCH v10 0/4] fw_cfg: add DMA operations & etc/vmcoreinfo support

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