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Ross Lagerwall 65d69d33da [efi] Fix hang during ExitBootServices() 
When ExitBootServices() invokes efi_shutdown_hook(), there may be
nothing to generate an interrupt since the timer is disabled in the
first step of ExitBootServices().  Additionally, for VMs OVMF masks
everything from the PIC (except the timer) by default.  This means
that calling cpu_nap() may hang indefinitely.  This was seen in
practice in netfront_reset() when running in a VM on XenServer.

Fix this by skipping the halt if an EFI shutdown is in progress.

Signed-off-by: Ross Lagerwall <ross.lagerwall@citrix.com>
Modified-by: Michael Brown <mcb30@ipxe.org>
Signed-off-by: Michael Brown <mcb30@ipxe.org>
 		2024-01-31 13:23:56 +00:00
.github/workflows [ci] Work around Ubuntu packaging metadata issues 2023-05-15 14:56:28 +01:00
contrib [cloud] Add utility script to read iPXE output from INT13CON partition 2023-11-07 18:05:45 +00:00
src [efi] Fix hang during ExitBootServices() 2024-01-31 13:23:56 +00:00
COPYING [legal] Update GPLv2 licence text 2015-02-26 17:59:53 +00:00
COPYING.GPLv2 [legal] Update GPLv2 licence text 2015-02-26 17:59:53 +00:00
COPYING.UBDL [legal] Add support for the Unmodified Binary Distribution Licence 2015-03-02 12:07:14 +00:00
README [doc] Re-add README file 2010-05-28 00:03:47 +01:00

README 

iPXE README File

Quick start guide:

   cd src
   make

For any more detailed instructions, see http://ipxe.org