freebsd-dev/sys/x86
Konstantin Belousov ea6020830c 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
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
x86 amd64: Add a knob to flush RSB on context switches if machine has SMEP. 2020-05-20 22:00:31 +00:00
xen