Commit Graph

3 Commits

Author SHA1 Message Date
Alan Cox
49bfa624ac Eliminate the arena parameter to kmem_free(). Implicitly this corrects an
error in the function hypercall_memfree(), where the wrong arena was being
passed to kmem_free().

Introduce a per-page flag, VPO_KMEM_EXEC, to mark physical pages that are
mapped in kmem with execute permissions.  Use this flag to determine which
arena the kmem virtual addresses are returned to.

Eliminate UMA_SLAB_KRWX.  The introduction of VPO_KMEM_EXEC makes it
redundant.

Update the nearby comment for UMA_SLAB_KERNEL.

Reviewed by:	kib, markj
Discussed with:	jeff
Approved by:	re (marius)
Differential Revision:	https://reviews.freebsd.org/D16845
2018-08-25 19:38:08 +00:00
Alan Cox
db7c2a4822 Eliminate the unused arena parameter from kmem_alloc_attr().
Reviewed by:	kib, markj
Differential Revision:	https://reviews.freebsd.org/D16793
2018-08-18 22:07:48 +00:00
Andriy Gapon
f5aac9074a add a module that provides support for DRAM ECC error injection on AMD CPUs
I imagine that the module would be useful only to a very limited number
of developers, so that's my excuse for not writing any documentation.
On a more serious note, please see DRAM Error Injection section of BKDGs
for families 10h - 16h.  E.g. section 2.13.3.1 of  BKDG for AMD Family 15h
Models 00h-0Fh Processors.

Many thanks to kib for his suggestions and comments.

Discussed with:	kib
MFC after:	3 weeks
Differential Revision: https://reviews.freebsd.org/D9824
2017-03-03 22:51:04 +00:00