freebsd-skq/sys/mips
Conrad Meyer 4ae224c663 Revert r240317 to prevent leaking pmap entries
Subsequent to r240317, kmem_free() was replaced with kva_free() (r254025).
kva_free() releases the KVA allocation for the mapped region, but no longer
clears the pmap (pagetable) entries.

An affected pmap_unmapdev operation would leave the still-pmap'd VA space
free for allocation by other KVA consumers.  However, this bug easily
avoided notice for ~7 years because most devices (1) never call
pmap_unmapdev and (2) on amd64, mostly fit within the DMAP and do not need
KVA allocations.  Other affected arch are less popular: i386, MIPS, and
PowerPC.  Arm64, arm32, and riscv are not affected.

Reported by:	Don Morris <dgmorris AT earthlink.net>
Submitted by:	Don Morris (amd64 part)
Reviewed by:	kib, markj, Don (!amd64 parts)
MFC after:	I don't intend to, but you might want to
Sponsored by:	Dell Isilon
Differential Revision:	https://reviews.freebsd.org/D25689
2020-07-16 23:29:26 +00:00
..
atheros [ar71xx] fix watchdog to work on subsequent SoCs 2020-07-15 19:34:19 +00:00
beri beri: correct kernel printf typo 2020-02-05 19:15:36 +00:00
broadcom Move phys_avail definition into MI code. It is consumed in the MI layer and 2019-08-16 00:45:14 +00:00
cavium Add some default cases for unreachable code to silence compiler warnings. 2020-06-10 00:09:31 +00:00
conf Switch from SCTP to SCTP_SUPPORT in GENERIC configs. 2020-07-16 15:09:04 +00:00
include Various fixes to TLS for MIPS. 2020-06-12 21:21:18 +00:00
ingenic Mark more nodes as CTLFLAG_MPSAFE or CTLFLAG_NEEDGIANT (17 of many) 2020-02-26 14:26:36 +00:00
malta Move phys_avail definition into MI code. It is consumed in the MI layer and 2019-08-16 00:45:14 +00:00
mediatek Add dwc_otg_acpi 2020-06-30 15:58:29 +00:00
mips Revert r240317 to prevent leaking pmap entries 2020-07-16 23:29:26 +00:00
nlm Add some default cases for unreachable code to silence compiler warnings. 2020-06-10 00:09:31 +00:00