[PATCH 0/4] ArmVirtPkg: implement basic capsule support

[Ard Biesheuvel <ard.biesheuvel@linaro.org>]

This wires up the existing basic support for capsules left in memory by
the OS across a warm reset. This involves wiring up the PEI phase modules
to preserve the capsule images before releasing the memory for normal
consumption, and some tweaks to the boot mode and BDS platform routines.

As proposed, this allows capsules to be used as a pstore backend, which
keeps the pstore payload in memory rather than in EFI variables. For
example, something like this is supported when the prerequisite Linux
patches have been merged (which are currently under review)

- modprobe capsule-pstore
- echo 1 > /sys/module/kernel/parameters/panic
- echo c > /proc/sysrq-trigger
- system reboot...
- ls -l /sys/fs/pstore/
  -r--r--r-- 1 root root 4386 Feb 12 00:31 console-efi-capsule-0
  -r--r--r-- 1 root root 9065 Feb 12 00:29 dmesg-efi-capsule-6250071391647825921
  -r--r--r-- 1 root root 9073 Feb 12 00:29 dmesg-efi-capsule-6250071391647825922
  -r--r--r-- 1 root root 9096 Feb 12 00:29 dmesg-efi-capsule-6250071391647825923
  -r--r--r-- 1 root root 9073 Feb 12 00:29 dmesg-efi-capsule-6250071391647825924
  -r--r--r-- 1 root root 9048 Feb 12 00:29 dmesg-efi-capsule-6250071391647825925

Updating the firmware image in NOR flash in this way should be feasible as
well, but this is something that builds on top of this basic capsule support,
and involves ESRT and FMP, which have far too few vowels for me to explain
what they entail.  

Ard Biesheuvel (4):
  ArmVirtPkg/ArmVirtPlatformLib: base boot mode on capsule presence
  ArmVirtPkg/ArmVirtMemoryInitPeiLib: check for capsules before memory
    init
  ArmVirtPkg/PlatformBootManagerLib: process pending capsules
  ArmVirtPkg/ArmVirtQemu: enable basic capsule support

 ArmVirtPkg/ArmVirtQemu.dsc                                             |  7 ++-
 ArmVirtPkg/ArmVirtQemu.fdf                                             |  2 +
 ArmVirtPkg/Library/ArmVirtMemoryInitPeiLib/ArmVirtMemoryInitPeiLib.c   | 60 +++++++++++++++++++-
 ArmVirtPkg/Library/ArmVirtMemoryInitPeiLib/ArmVirtMemoryInitPeiLib.inf |  9 ++-
 ArmVirtPkg/Library/ArmVirtPlatformLib/ArmVirtPlatformLib.inf           |  5 +-
 ArmVirtPkg/Library/ArmVirtPlatformLib/Virt.c                           |  4 ++
 ArmVirtPkg/Library/PlatformBootManagerLib/PlatformBm.c                 | 17 ++++++
 ArmVirtPkg/Library/PlatformBootManagerLib/PlatformBootManagerLib.inf   |  2 +
 8 files changed, 101 insertions(+), 5 deletions(-)

-- 
2.7.4