freebsd-nq/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 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