Konstantin Belousov b4dfc9d7ad PTI: Trap if we returned to userspace with kernel (full) page table ... still active. Map userspace portion of VA in the PTI kernel-mode page table as non-executable. This way, if we ever miss reloading ucr3 into %cr3 on the return to usermode, the process traps instead of executing in potentially vulnerable setup. Catch the condition of such trap and verify user-mode %cr3, which is saved by page fault handler. I peek this trick in some article about Linux implementation. Reviewed by: alc, markj (previous version) Sponsored by: The FreeBSD Foundation MFC after: 12 days DIfferential revision: https://reviews.freebsd.org/D13956		2018-01-19 22:10:29 +00:00
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acpica	sys/amd64: further adoption of SPDX licensing ID tags.	2017-11-27 15:03:07 +00:00
amd64	PTI: Trap if we returned to userspace with kernel (full) page table	2018-01-19 22:10:29 +00:00
cloudabi32	Use TO_PTR() to convert integers to pointers.	2017-11-26 14:45:56 +00:00
cloudabi64	Use TO_PTR() to convert integers to pointers.	2017-11-26 14:45:56 +00:00
conf	Move VM_NUMA_ALLOC and DEVICE_NUMA under the single global config option NUMA.	2018-01-14 03:36:03 +00:00
ia32	PTI for amd64.	2018-01-17 11:44:21 +00:00
include	PTI: Trap if we returned to userspace with kernel (full) page table	2018-01-19 22:10:29 +00:00
linux	Disable vim syntax highlighting.	2017-11-28 18:23:17 +00:00
linux32	Disable vim syntax highlighting.	2017-11-28 18:23:17 +00:00
pci	sys/amd64: further adoption of SPDX licensing ID tags.	2017-11-27 15:03:07 +00:00
sgx	Fix module unload when SGX support is not present in CPU.	2017-08-18 14:47:06 +00:00
vmm	Save and restore guest debug registers.	2018-01-17 23:11:25 +00:00
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