With the new 32-bit UEFI loader, it's convenient to have a sysctl to
figure out how we booted. Can be accessed at machdep.efi_arch
Reviewed by: imp
Pull Request: https://github.com/freebsd/freebsd-src/pull/1098
(cherry picked from commit b538d4911004ca541507166b8ec9689d2e87d1aa)
(cherry picked from commit 0e8890a425bc778d323566c881e26bad7c54baf2)
Approved by: so
Security: FreeBSD-EN-25:12.efi
This is intended to clean state of a thread at the end of its
lifecycle during wait(), not the beginning of its life cycle.
Reviewed by: kib
Sponsored by: AFRL, DARPA
Differential Revision: https://reviews.freebsd.org/D48023
(cherry picked from commit 0e742cc77454d0872ac2f6e7fd755b6d0322b711)
None of these drivers are for bus devices, so bus_generic_* is not
appropriate. Most of these were nops except that detach would
actually "succeed" (but not do any cleanup).
Reviewed by: imp
Differential Revision: https://reviews.freebsd.org/D47374
(cherry picked from commit df615735960370255d3acc4ac2a6f4fd297b7461)
This is mostly to reduce the diff with CheriBSD which adds additional
constants to enum uio_rw, but also matches the normal style used for
uio_segflg.
Reviewed by: kib, emaste
Obtained from: CheriBSD
Differential Revision: https://reviews.freebsd.org/D45142
(cherry picked from commit 473c90ac04cec0abbb414978c53e9c259c9129e8)
We previously defaulted to using sc(4) with a special case to prefer
vt(4) when booted via UEFI. As vt(4) is now always the default we can
simplify this.
Reviewed by: imp, kevans
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D45356
(cherry picked from commit 9b1de7e4844d951a7d7335cbde75a86a2380e220)
Make the tlb shootdown function as a pointer. By default, it still
points to the system function smp_targeted_tlb_shootdown(). It allows
other implemenations to overwrite in the future.
Reviewed by: kib
Tested by: whu
Authored-by: Souradeep Chakrabarti <schakrabarti@microsoft.com>
Co-Authored-by: Erni Sri Satya Vennela <ernis@microsoft.com>
MFC after: 1 week
Sponsored by: Microsoft
Differential Revision: https://reviews.freebsd.org/D45174
(cherry picked from commit bec000c9c1ef409989685bb03ff0532907befb4a)
I cannot find a time where the function was not named this.
Reviewed by: kib, markj
MFC after: 3 days
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D45383
(cherry picked from commit deab57178f0b06eab56d7811674176985a8ea98d)
Report syscalls that are not allowed in capability mode with
CAPFAIL_SYSCALL.
Reviewed by: markj
Approved by: markj (mentor)
MFC after: 1 month
Differential Revision: https://reviews.freebsd.org/D40678
(cherry picked from commit 05296a0ff615566d25c77c5e6619b08724d2eecb)
_Alignof(expression) is a non-standard extension. This is not allowed
in gnu11 and gnu17 which follow the C11 standard _Alignof(type).
Reviewed by: arichardson, imp, jhb
Fixes: 4a9cd9fc22d7 amd64 db_trace: Reject unaligned frame pointers
Fixes: 7ccaf76a27 riscv db_trace: Ensure trapframe pointer is suitably aligned.
Fixes: 638c68897f arm64 db_trace: Ensure trapframe pointer is suitably aligned.
Differential Revision: https://reviews.freebsd.org/D43409
(cherry picked from commit 03d04bf49492fc70366e6d78194336a4122282a2)
Some implementations copy data to userspace, an operation which can in
principle fail. In preparation for adding a __result_use_check
annotation to copyin() and related functions, let implementations of
cpu_set_upcall() return an error, and check for errors when copying data
to user memory.
Reviewed by: kib, jhb
MFC after: 1 week
Differential Revision: https://reviews.freebsd.org/D43100
(cherry picked from commit 7b68fb5ab2a276ccd081cc1a43cebf0fb315e952)
While here, centralize the macros in <x86/fpu.h>.
Reviewed by: markj
Differential Revision: https://reviews.freebsd.org/D42135
(cherry picked from commit cc1cb9ea0c5607931fa9b7ecf786468d38fb8491)
With clang it expands to "inline"; clang in practice may inline
externally visible functions even without the hint. So just remove the
hints and let the compiler decide.
No functional change intended. pmap.o is identical before and after
this patch.
Reviewed by: alc
MFC after: 1 week
Differential Revision: https://reviews.freebsd.org/D42446
(cherry picked from commit 2b084923824e0d5133fe5aff580b4e562fe7dd19)
Make sure that we don't try to copy with a negative resid.
Make sure that we don't walk off the end of the iovec array.
Reviewed by: kib
MFC after: 1 week
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D42098
(cherry picked from commit 8fd0ec53deaad34383d4b344714b74d67105b258)
The sysctl knob 'vm.pmap.allow_2m_x_ept' is loader tunable and have
public document entry in security(7) but is fetched from kernel
environment 'hw.allow_2m_x_ept'. That is inconsistent and obscure.
As there is public security advisory FreeBSD-SA-19:25.mcepsc [1],
people may refer to it and use 'hw.allow_2m_x_ept', let's keep old
name for compatibility.
[1] https://www.freebsd.org/security/advisories/FreeBSD-SA-19:25.mcepsc.asc
Reviewed by: kib
Fixes: c08973d09c Workaround for Intel SKL002/SKL012S errata
MFC after: 3 days
Differential Revision: https://reviews.freebsd.org/D42311
(cherry picked from commit 9e7f349ff10691c2e3fb03898dbc942794a47566)
To match the sysctl MIBs and document entries in security(7).
Fixes: 2dec2b4a34 amd64: flush L1 data cache on syscall return with an error
Fixes: 17edf152e5 Control for Special Register Buffer Data Sampling mitigation
Reviewed by: kib
MFC after: 1 day
Differential Revision: https://reviews.freebsd.org/D42249
(cherry picked from commit afbb8041a0633c97acb51ac895c9ae3cde4fe540)
