[SeaBIOS] [PATCH 0/2] Improve reboot races during post and reboot

[Kevin O'Connor]

This is a follow up to an email chain that in November:

  http://www.seabios.org/pipermail/seabios/2015-November/009887.html

It was possible for the SeaBIOS code to get confused if an external
reboot request occurs while seabios is already in the process of
handling a boot or reboot.

This two patch series attempts to make the SeaBIOS reboot code more
robust.  With these patches the code maintains an invariant - if
HaveRunPost is false then the BIOS code will be in a pristine state
and it is okay to run the "post" boot logic; if HaveRunPost is true
then the reboot logic must be run before starting the "post" boot
logic.  The reboot handler should always return the BIOS code to a
pristine state prior to clearing HaveRunPost.

-Kevin


Kevin O'Connor (2):
  resume: Make KVM soft reboot loop detection more flexible
  post: Always set HaveRunPost prior to setting any other global
    variable

 src/fw/csm.c    |  1 +
 src/fw/shadow.c | 17 +++++++++++++++--
 src/fw/xen.c    |  1 +
 src/post.c      | 20 ++++++++++++++++----
 src/resume.c    |  9 ---------
 src/util.h      |  1 +
 6 files changed, 34 insertions(+), 15 deletions(-)

-- 
2.5.0