vm_offset_t pmap_quick_enter_page(vm_page_t m)
void pmap_quick_remove_page(vm_offset_t kva)
These will create and destroy a temporary, CPU-local KVA mapping of a specified page.
Guarantees:
--Will not sleep and will not fail.
--Safe to call under a non-sleepable lock or from an ithread
Restrictions:
--Not guaranteed to be safe to call from an interrupt filter or under a spin mutex on all platforms
--Current implementation does not guarantee more than one page of mapping space across all platforms. MI code should not make nested calls to pmap_quick_enter_page.
--MI code should not perform locking while holding onto a mapping created by pmap_quick_enter_page
The idea is to use this in busdma, for bounce buffer copies as well as virtually-indexed cache maintenance on mips and arm.
NOTE: the non-i386, non-amd64 implementations of these functions still need review and testing.
Reviewed by: kib
Approved by: kib (mentor)
Differential Revision: http://reviews.freebsd.org/D3013
This config is already building all modules, so we don't need the
MODULES_EXTRA definition. It was also causing problems to users who
rely on MODULES_OVERRIDE to do the right thing.
Discussed with: ian
defines the keys differently than NIST does, so we have to muck with
key lengths and nonce/IVs to be standard compliant...
Remove the iv from secasvar as it was unused...
Add a counter protected by a mutex to ensure that the counter for GCM
and ICM will never be repeated.. This is a requirement for security..
I would use atomics, but we don't have a 64bit one on all platforms..
Fix a bug where IPsec was depending upon the OCF to ensure that the
blocksize was always at least 4 bytes to maintain alignment... Move
this logic into IPsec so changes to OCF won't break IPsec...
In one place, espx was always non-NULL, so don't test that it's
non-NULL before doing work..
minor style cleanups...
drop setting key and klen as they were not used...
Enforce that OCF won't pass invalid key lengths to AES that would
panic the machine...
This was has been tested by others too... I tested this against
NetBSD 6.1.5 using mini-test suite in
https://github.com/jmgurney/ipseccfgs and the only things that don't
pass are keyed md5 and sha1, and 3des-deriv (setkey syntax error),
all other modes listed in setkey's man page... The nice thing is
that NetBSD uses setkey, so same config files were used on both...
Reviewed by: gnn
overflows the stack during root mount in some configurations.
Tested by: Fabian Keil <freebsd-listen@fabiankeil.de> (previous version)
Sponsored by: The FreeBSD Foundation
MFC after: 2 weeks
of the timehands, from the kern_tc.c implementation to vdso. Add
comments giving hints where to look for the algorithm explanation.
To compensate the removal of rmb() in userspace binuptime(), add
explicit lfence instruction before rdtsc. On i386, add usual
complications to detect SSE2 presence; assume that old CPUs which do
not implement SSE2 also execute rdtsc almost in order.
Reviewed by: alc, bde (previous version)
Sponsored by: The FreeBSD Foundation
MFC after: 2 weeks
It looks like umtx_key_get() has the addition and subtraction the wrong
way around, meaning that it fails to match in certain cases. This causes
the cloudlibc unit tests to deadlock in certain cases.
Reviewed by: kib
Differential Revision: https://reviews.freebsd.org/D3287
The filter is called from the network hot path and must not sleep.
The filter runs with the descriptor lock held and does not manipulates the
buffers, so it is not necessary sleep when the hold buffer is in use.
Just ignore the hold buffer contents when it is being copied to user space
(when hold buffer in use is set).
This fix the "Sleeping thread owns a non-sleepable lock" panic when the
userland thread is too busy reading the packets from bpf(4).
PR: 200323
MFC after: 2 weeks
Sponsored by: Rubicon Communications (Netgate)
a pcb from stoppcbs[] rather than the thread's PCB. However, exited threads
retained td_oncpu from the last time they ran, and newborn threads had their
CPU fields cleared to zero during fork and thread creation since they are
in the set of fields zeroed when threads are setup. To fix, explicitly
update the CPU fields for exiting threads in sched_throw() to reflect the
switch out and reset the CPU fields for new threads in sched_fork_thread()
to NOCPU.
Reviewed by: kib
MFC after: 1 week
Differential Revision: https://reviews.freebsd.org/D3193
which constitute the majority of the pages that are processed by
vm_fault_dontneed(), are already near the tail of the inactive queue. Only
the pages at faulting virtual addresses are actually moved by
vm_page_advise(..., MADV_DONTNEED). However, vm_page_advise(...,
MADV_DONTNEED) is simultaneously too aggressive and passive for the moved
pages. It makes most of these pages too easily reclaimable, and at the same
time it leaves enough pages in the active queue to trigger pageouts by the
page daemon. Instead, with this change, the pages at faulting virtual
addresses are moved to the tail of the inactive queue, where they are
relatively close to the pages prefetched by the same page fault.
Discussed with: jeff
Sponsored by: EMC / Isilon Storage Division
as it is now, devfs ignores MNT_FORCE anyway, so it needs to be modified
to trigger the panic) with consumers still opened.
Note that this still results in a leak of r/w/e counters. It seems
to be harmless, though. If anyone knows a better way to approach
this - please tell.
Discussed with: kib@, mav@
MFC after: 1 month
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D3050
For example, without this patch, the following three lines
in /boot/loader.conf would result in /boot/root.img being preloaded
twice, and two md(4) devices - md0 and md1 - being created.
initmd_load="YES"
initmd_type="md_image"
initmd_name="/boot/root.img"
Reviewed by: marcel@
MFC after: 1 month
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D3204
When doing a data abort from userland it is possible to get
more than one data abort inside the same exception level.
Add an appropriate exception number to allow nesting of
data_abort handler for EL0.
Reviewed by: andrew
Obtained from: Semihalf
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D3276
CloudABI processes should run in capabilities mode automatically. There
is no need to switch manually (e.g., by calling cap_enter()). Add a
flag, SV_CAPSICUM, that can be used to call into cap_enter() during
execve().
Reviewed by: kib
reported, on APs. We already did this on BSP.
Otherwise, the userspace software which depends on the features
reported by the high CPUID levels is misbehaving. In particular, AVX
detection is non-functional, depending on which CPU thread happens to
execute when doing CPUID. Another victim is the libthr signal
handlers interposer, which needs to save full FPU extended state.
Reported and tested by: Andre Meiser <ortadur@web.de>
Sponsored by: The FreeBSD Foundation
MFC after: 2 weeks
- The existing TCP INP_INFO lock continues to protect the global inpcb list
stability during full list traversal (e.g. tcp_pcblist()).
- A new INP_LIST lock protects inpcb list actual modifications (inp allocation
and free) and inpcb global counters.
It allows to use TCP INP_INFO_RLOCK lock in critical paths (e.g. tcp_input())
and INP_INFO_WLOCK only in occasional operations that walk all connections.
PR: 183659
Differential Revision: https://reviews.freebsd.org/D2599
Reviewed by: jhb, adrian
Tested by: adrian, nitroboost-gmail.com
Sponsored by: Verisign, Inc.
hangs on shutdown with LUNs with mounted filesystems over a disconnected
iSCSI session.
MFC after: 1 month
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D3052
in savectx where it will be used to store the current state however will
pass in a pcb when vfp_save_state expected a thread pointer.
Obtained from: ABT Systems Ltd
Sponsored by: The FreeBSD Foundation
The check introduced by r285946 failed to add the dependency on
opt_kstack_pages.h which meant the default value for the platform instead
of the customised options KSTACK_PAGES=X was being tested.
Also wrap in #ifdef __FreeBSD__ for portability.
MFC after: 3 days
Sponsored by: Multiplay
Certain system calls have quirks applied to make them work as if called
on an older version of FreeBSD. As CloudABI executables don't have the
FreeBSD OS release number in the ELF header, this value is set to zero,
making the system calls fall back to typically historic, non-standard
behaviour.
Reviewed by: kib
/usr/home/adrian/work/freebsd/head-embedded-2/src/usr.sbin/pw/pw_user.c: In function 'pw_user_next':
/usr/home/adrian/work/freebsd/head-embedded-2/src/usr.sbin/pw/pw_user.c:680: warning: statement with no effect
