[PATCH 0/5] OvmfPkg, ArmVirtPkg: QemuFwCfgLib: partial rewrite of fw_cfg files

[Laszlo Ersek <lersek@redhat.com>]

This feature will allow OvmfPkg/AcpiPlatformDxe to implement the
QEMU_LOADER_WRITE_POINTER command, which will instruct the firmware to
write the address of a previously allocated/downloaded fw_cfg blob into
another (writeable) fw_cfg file at a specific offset, in order to inform
QEMU about the allocation address. The command will be based on the
QemuFwCfgSkipBytes() and QemuFwCfgWriteBytes() APIs.

Ref:    https://bugzilla.tianocore.org/show_bug.cgi?id=359
Repo:   https://github.com/lersek/edk2.git
Branch: fwcfg_skip

Cc: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Cc: Jordan Justen <jordan.l.justen@intel.com>

Thanks,
Laszlo

Laszlo Ersek (5):
  OvmfPkg/QemuFwCfgLib: generalize InternalQemuFwCfgDmaBytes() to SKIP
    op
  OvmfPkg/QemuFwCfgLib: add QemuFwCfgSkipBytes()
  ArmVirtPkg/QemuFwCfgLib: extract generic DmaTransferBytes() function
  ArmVirtPkg/QemuFwCfgLib: use DMA for QemuFwCfgWriteBytes() if
    available
  ArmVirtPkg/QemuFwCfgLib: implement QemuFwCfgSkipBytes() API

 OvmfPkg/Include/Library/QemuFwCfgLib.h         |  16 ++
 ArmVirtPkg/Library/QemuFwCfgLib/QemuFwCfgLib.c | 178 ++++++++++++++++++--
 OvmfPkg/Library/QemuFwCfgLib/QemuFwCfgLib.c    |  75 +++++++--
 3 files changed, 246 insertions(+), 23 deletions(-)

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2.9.3