svn commit: r331209 - head

[Kyle Evans]

Author: kevans
Date: Mon Mar 19 15:27:53 2018
New Revision: 331209
URL: https://svnweb.freebsd.org/changeset/base/331209

Log:
  Add note to UPDATING about UEFI changes requiring loader(8) update
  
  These problems have only been observed with boards using U-Boot (e.g. ARM)
  where virtual addresses are already set in the memory map by the firmware
  and the firmware is expecting a call to SetVirtualAddressMap to be made.
  I refrain from mentioning this in the note because this could also be the
  case on some not-yet-tested firmware on amd64 and it's not a bad
  recommendation for the general case.

Modified:
  head/UPDATING

Modified: head/UPDATING
==============================================================================
--- head/UPDATING	Mon Mar 19 15:11:10 2018	(r331208)
+++ head/UPDATING	Mon Mar 19 15:27:53 2018	(r331209)
@@ -51,6 +51,13 @@ NOTE TO PEOPLE WHO THINK THAT FreeBSD 12.x IS SLOW:
 
 ****************************** SPECIAL WARNING: ******************************
 
+20180319:
+	For UEFI systems: the UEFI loader(8), loader.efi, should be updated in
+	conjunction with installing a new kernel after r330868. The kernel,
+	after this revision, will be more lenient when mapping addresses for
+	UEFI Runtime Services and this may result in a kernel panic without the
+	corresponding loader(8) update.
+
 20180212:
 	FreeBSD boot loader enhanced with Lua scripting. It's purely opt-in for
 	now by building WITH_LOADER_LUA and WITHOUT_FORTH in /etc/src.conf.