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
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booke_machdep.c	powerpc/mmu: Convert PowerPC pmap drivers to ifunc from kobj	2020-05-27 01:24:12 +00:00
locore.S	powerpc/booke: Fix 32-bit Book-E SMP AP bringup	2019-12-04 03:41:55 +00:00
machdep_e500.c	[PowerPC] Fix booke64 qemu infinite loop in L2 cache enable	2020-06-19 18:40:39 +00:00
mp_cpudep.c	sys/powerpc: further adoption of SPDX licensing ID tags.	2017-11-27 15:09:59 +00:00
platform_bare.c	sys/powerpc: further adoption of SPDX licensing ID tags.	2017-11-27 15:09:59 +00:00
pmap.c	Revert r240317 to prevent leaking pmap entries	2020-07-16 23:29:26 +00:00
pmap_32.c	powerpc/mmu: Convert PowerPC pmap drivers to ifunc from kobj	2020-05-27 01:24:12 +00:00
pmap_64.c	powerpc/pmap: Fix pte_find_next() iterators for booke64 pmap	2020-06-10 23:03:35 +00:00
spe.c	powerpc: Simplify _nodrop variants of FPU and vector register saves	2020-03-13 01:27:37 +00:00
trap_subr.S	powerpc/booke: Change Book-E 64-bit pmap to 4-level table	2020-04-11 00:12:34 +00:00