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freebsd-skq/sys/x86
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kib 7265cef267 amd64: Add a knob to flush RSB on context switches if machine has SMEP. 
The flush is needed to prevent cross-process ret2spec, which is not handled
on kernel entry if IBPB is enabled but SMEP is present.
While there, add i386 RSB flush.

Reported by:	Anthony Steinhauser <asteinhauser@google.com>
Reviewed by:	markj, Anthony Steinhauser
Discussed with:	philip
admbugs:	961
Sponsored by:	The FreeBSD Foundation
MFC after:	1 week
2020-05-20 22:00:31 +00:00
..
acpica
Call acpi_pxm_set_proximity_info() slightly earlier on x86.
2020-05-14 16:07:27 +00:00
bios
Mark more nodes as CTLFLAG_MPSAFE or CTLFLAG_NEEDGIANT (17 of many)
2020-02-26 14:26:36 +00:00
conf
Floppy driver really only works on x86
2019-08-12 22:58:50 +00:00
cpufreq
Mark more nodes as CTLFLAG_MPSAFE or CTLFLAG_NEEDGIANT (17 of many)
2020-02-26 14:26:36 +00:00
include
amd64: Add a knob to flush RSB on context switches if machine has SMEP.
2020-05-20 22:00:31 +00:00
iommu
Mark more nodes as CTLFLAG_MPSAFE or CTLFLAG_NEEDGIANT (17 of many)
2020-02-26 14:26:36 +00:00
isa
Mark more nodes as CTLFLAG_MPSAFE or CTLFLAG_NEEDGIANT (17 of many)
2020-02-26 14:26:36 +00:00
pci
Add pci_early function to detect Intel stolen memory.
2018-10-31 23:17:00 +00:00
x86
amd64: Add a knob to flush RSB on context switches if machine has SMEP.
2020-05-20 22:00:31 +00:00
xen
xen: fix dispatching of NMIs
2019-11-12 10:31:28 +00:00