tree 8b8cfc1548007d9969aaca512aa5de3f8fcd32d8
parent f31ab7a4976760b63e1ca01fa9490893a0a712bc
author Nico Huber <nico.h@gmx.de> 1687468660 +0200
committer Lean Sheng Tan <sheng.tan@9elements.com> 1687510070 +0000

allocator_v4: Fix top-level allocations w/o IORESOURCE_ABOVE_4G

When moving the code to allocate at the top level in commit 9260ea60bfa4
(allocator_v4: Use memranges only for toplevel), a call to restrict the
limit of the resource was dropped. Probably by accident in one of the
earliest rebases. Without this call to effective_limit(), 64-bit resour-
ces at the top level, i.e. PCI bus 0, were always placed above 4G. Even
when this was not requested with the IORESOURCE_ABOVE_4G flag.

Tested on kontron/ktqm77 where the issue could be reproduced with
x86_64. Without the fix, boot hangs when trying to access the GMA
MMIO registers of PCI 00:02.0, which were placed above 4G.

Change-Id: Ied3a0695ef5e91f092bf2d442c1c482057643483
Signed-off-by: Nico Huber <nico.h@gmx.de>
Found-by: 9elements QA
Reviewed-on: https://review.coreboot.org/c/coreboot/+/76090
Reviewed-by: Felix Singer <service+coreboot-gerrit@felixsinger.de>
Reviewed-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-by: Eric Lai <eric_lai@quanta.corp-partner.google.com>
Reviewed-by: Paul Menzel <paulepanter@mailbox.org>
Reviewed-by: Lean Sheng Tan <sheng.tan@9elements.com>
Reviewed-by: Arthur Heymans <arthur@aheymans.xyz>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>