ed [Mon, 19 Sep 2016 17:31:05 +0000 (17:31 +0000)]
Sync in latest vDSOs from upstream.
- Use conditional instruction to simplify the ARMv6 vDSO. This means
that we no longer perform any branching. In the failure case, we
simply slide over the assignments of the return values.
The vDSO could be improved even further by using stmia to do
assignments in parallel. Unfortunately, the script used to generate
these is not smart enough for that (yet).
Spotted by: andrew@.
- Make the style of the i686 vDSO more similar to the others by using
decimal literals.
uefisign: Remove backwards-compatibility sys/capability.h support
uefisign previously included sys/capability.h or sys/capsicum.h based
on __FreeBSD_version in order to facilitate development on the stable
branch. The Capsicum header is now installed as sys/capsicum.h in
stable/10 and FreeBSD 10.3, so there's no need for the backwards
compatibility support.
Reviewed by: trasz
Sponsored by: The FreeBSD Foundation
If BIOS performed hand-off to OS with BSP LAPIC in the x2APIC mode,
system usually consumes such configuration without a notice, since
x2APIC is turned on by OS if possible (nop). But if BIOS
simultaneously requested OS to not use x2APIC, code assumption that
that xAPIC is active breaks.
In my opinion, we cannot safely turn off x2APIC if control is passed
in this mode. Make madt.c ignore user or BIOS requests to turn x2APIC
off, and do not check the x2APIC black list. Just trust the config
and try to continue, giving a warning in dmesg.
Reported and tested by: Slawa Olhovchenkov <slw@zxy.spb.ru> (previous version)
Diagnosed by and discussed with: avg
Sponsored by: The FreeBSD Foundation
MFC after: 2 weeks
Be more strict when selecting between snapshot/regular mount.
Reclaimed vnode type is VBAD, so succesful comparision like
devvp->v_type != VREG does not imply that the devvp references
snapshot, it might be due to a reclaimed vnode. Explicitely check the
vnode type.
In the the most important case of ffs_blkfree(), the devfs vnode is
locked and its type is stable. In other cases, if the vnode is
reclaimed right after the check, hopefully the buffer methods return
right error codes.
Reviewed by: mckusick
Sponsored by: The FreeBSD Foundation
MFC after: 2 weeks
andrew [Mon, 19 Sep 2016 15:08:03 +0000 (15:08 +0000)]
Attach the cortex strings library to the build. Only a subset of functions
have been added as some don't seem to be improvements over the libc C
implementation.
Obtained from: ABT Systems Ltd
Sponsored by: The FreeBSD Foundation
- Don't change RNDIS RSS configuration for RSS key sysctl, if the
interface is not capable of RSS yet.
- Don't change RSS indirect table (both cached one and RNDIS RSS
configuration), if the interface is not capable of RSS yet.
MFC after: 1 week
Sponsored by: Microsoft
Differential Revision: https://reviews.freebsd.org/D7924
ed [Sun, 18 Sep 2016 20:47:55 +0000 (20:47 +0000)]
Replace dirname(3) by a copy that complies to POSIX.
It turns out that the path normalization that our brand new copy of
dirname(3) does is actually not allowed by the draft version of the
upcoming version of POSIX. It has to behave identically to the
dirname(1) utility.
This change replaces our new dirname(3) implementation by yet another
version that doesn't implement the path normalization logic; it merely
looks for the end of the directory name and overwrites that with a null
byte.
More details: See note #3370 at http://austingroupbugs.net/view.php?id=1073
stdio uses fstat and the TIOCGETA ioctl. Also collapse the
cap_rights_limit and new cap_ioctls_limit calls into one if statement.
Errors here are not actionable by the user and distinguishing stdout
from stderr doesn't really have value.
Reported by: kib
Reviewed by: allanjude, bapt
MFC after: 1 week
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D7944
ed [Sun, 18 Sep 2016 17:23:53 +0000 (17:23 +0000)]
Fix badly computed register/stack offset of system call output arguments.
Bugs in the Python code used to generate this vDSO caused us to
miscompute the register numbers/stack offsets at which addresses of the
system call output arguments were stored.
Together with some other patches, this vDSO allows us to make all of the
cloudlibc unit tests pass.
As a trick to be able to access all files passed in arguments (readonly) within
the sandbox we first open the root directory, then consider all files as
relative to this file descriptor.
This might be improved once casper add supports for filesystem.
In preparation for the removal of GNU rcs from base, remove the backup_uses_rcs
functionality from the rc.subr backup_file feature. This functionnality was off
by default
ed [Sun, 18 Sep 2016 11:36:54 +0000 (11:36 +0000)]
Add very preliminary support for CloudABI for ARMv6.
In order to make CloudABI work on ARMv6, start off by copying over the
sysvec for ARM64 and adjust it to use 32-bit registers. Also add code
for fetching arguments from the stack if needed, as there are fewer
register than on ARM64.
Also import the vDSO that is needed to invoke system calls. This vDSO
uses the intra procedure call register (ip) to store the system call
number. This is a bit simpler than what native FreeBSD does, as FreeBSD
uses r7, while preserving the original r7 into ip.
This sysvec seems to be complete enough to start CloudABI processes.
These processes are capable of linking in the vDSO and are therefore
capable of executing (most?) system calls successfully. Unfortunately,
the biggest show stopper is still that TLS is completely broken:
- The linker used by CloudABI, LLD, still has troubles with some of the
relocations needed for TLS. See LLVM bug 30218 for more details.
- Whereas FreeBSD uses the tpidruro register for TLS, for CloudABI I
want to make use of tpidrurw, so that userspace can modify the base
address directly. This is needed for efficient emulation.
Unfortunately, this register doesn't seem to be preserved across
context switches yet.
Obtained from: https://github.com/NuxiNL/cloudabi (the vDSO)
adrian [Sun, 18 Sep 2016 05:07:18 +0000 (05:07 +0000)]
[iwm] fix up RSSI calculations for both scan results and normal RX operations.
* hard code a noise floor of -96 for now. The noise floor update code returns
some "interesting" values that I can't map to anything useful right now.
* Ensure a default noise floor is set - otherwise the initial scan results
have a noise floor of '0'.
* Fix up the RSSI calculation to be correctly relative to the noise floor.
The RSSI routines return an absolute value in dBm - so fix this up.
* Cap RSSI values appropriately.
* Ensure we pass in a 1/2 dB unit value in to net80211.
Tested:
* Intel 7260, STA mode
iwm0: <Intel Dual Band Wireless AC 7260> mem 0xf1400000-0xf1401fff irq 17 at device 0.0 on pci2
iwm0: hw rev 0x140, fw ver 16.242414.0, address xx:xx:xx:xx:xx:xx
bhnd(4): Fix regression in BCM4331 SPROM pin reference counting.
In r304870, refcount handling was lifted out into a common OTP/SPROM code
path, but the refcount assertions in chipc_disable_sprom_pins() were not
updated accordingly; this triggered an assertion on BCM4331 devices when
releasing a SPROM pin reservation.
Fix libprocstat build after r305902.
- Use _Bool to not require userspace to include stdbool.h.
- Make extattr.h usable without vnode_if.h.
- Follow i_ump to get cdev pointer.
Sponsored by: The FreeBSD Foundation
MFC after: 2 weeks
Remove redunand i_dev and i_fs pointers, which are available as
ip->i_ump->um_dev and ip->i_ump->um_fs, and reorder members by size to
reduce padding. To compensate added derefences, the most often i_ump
access to differentiate between UFS1 and UFS2 dinode layout is
removed, by addition of the new i_flag IN_UFS2. Overall, this
actually reduces the amount of memory dereferences.
On 64bit machine, original struct inode size is 176, reduced to 152
bytes with the change.
Tested by: pho (previous version)
Reviewed by: mckusick
Sponsored by: The FreeBSD Foundation
MFC after: 2 weeks
Remove all kernel uses of pcb_psl, but keep in in the struct to
preserve the ABI and API for applications. It was removed in the port
to amd64, but was remained as garbage giving a micro-pessimization and
spurious single-step traps on i386.
pcb_psl was intended to be used just to do a context switch of PSL_I,
but this context switch was null in most or all versions, and
mis-switching of PSL_T was done instead.
Some history:
- in 386BSD-0.0, cpu_switch() ran at splhigh() and splhigh() did too
much interrupt disabling, so interrupts were hard-disabled across
cpu_switch() and too many other places
- in 386BSD-0.0-patchkit through FreeBSD-4 and FreeBSD-5 before
SMPng, splhigh() did soft interrupt masking, and cpu_switch() was
excessively cautious and did a cli at the start and a sti at the
end to hard-disable interrupts across the switch
- SMPng replaced the spl's and cli's by spinlocks (just sched_lock?),
so interrupts were hard-disabled across cpu_switch() and too many
other places again
- initial attempts to fix this intended to restore some soft
interrupt disabling, but to support variations in this cpu_switch()
used pushfl/popfl into pcb_psl to avoid hard-coding the assumption
that the initial and final states have PSL_I enabled. But the
version with soft interrupt disabling wasn't used for long, or was
never committed, (except I always used my different version of it
for UP) so the pushfl/popl and pcb_psl to hold them have been doing
less than nothing for about 14 years.
Maximum of 16 ports per device can be created. Every port is named
and corresponds to an Unix domain socket created by bhyve. bhyve
accepts at most one connection per port at a time.
Limitations:
- due to lack of destructors of in bhyve, sockets on the filesystem
must be cleaned up manually after bhyve exits
- there's no way to use "console port" feature, nor the console port
resize as of now
- emergency write is advertised, but no-op as of now
Silently ignore unexpected single-step traps (except for turning
off single-stepping). Only do this on arches (only x86 so far)
which classify single-step traps unambiguously.
This allows other parts of the kernel to be intentionally and
unintentionally sloppy about generating single-step traps. On
x86, at least the following places were unintentionally sloppy:
- all operations that context-switched [er]flags. Especially
spinlock_enter()/exit() and cpu_switch(). When single-stepped,
saving the flags leaves PSL_T set in the saved flags, so
restoring gives a trap that is spurious if it occurs after
single-step mode has been left. Switching contexts away from
a low priority thread gives especially long-lived saved copies.
- the vm86 emulation allows user mode to set PSL_T. This was
correct until vm86 bios call mode was unintentionally given
access to kdb handling its single-step traps.
Now these places are intentionally sloppy, but unexpected
debugger traps still cause panics if no debugger that handles
the trap is attached when the trap is delivered.
adrian [Sat, 17 Sep 2016 05:44:57 +0000 (05:44 +0000)]
[net80211] add a HT method to populate HTCAP based on IBSS requirements.
IBSS negotiation is a subset of the STA/AP negotiation. We always have a
current channel, so base the HT capabilities on the current channel.
This is then put into IBSS probe requests to inform peers of our
11n capabilities.
When mlx5e_sq_xmit() returns an error code and the mbuf pointer is set,
we should not free the mbuf, because the caller will keep the mbuf in
the drbr. Make sure the mbuf pointer is correctly set upon function
exit.
mlx5en: Allow setting the software MTU size below 1500 bytes
The hardware MTU size can't be set to a value less than 1500 bytes due
to side-band management support. Allow setting the software MTU size
below 1500 bytes, thus creating a mismatch between hardware and
software MTU sizes.
mlx5en: Factor out common sendqueue code for use with rate limiting SQs.
Try to reuse code to setup sendqueues when possible by making some static
functions global. Further split the mlx5e_close_sq_wait() function to
separate out reusable parts.
This change also reduces the size of the mlx5e_sq structure so that the last
queue_state element will fit into the previous cacheline and then the mlx5e_sq
structure becomes one cacheline less for amd64.
mlx5en: Minor completion queue control path code refactor.
Move setting of CQ moderation mode together with the other
CQ moderation parameters. Pass completion event vector as
a separate argument to mlx5e_open_cq(), because its value is
different for each call. Pass mlx5e_priv pointer instead of
mlx5e_channel pointer so that code can be used by rate
limiting sendqueues.
Update the MLX5 core module:
- Add new firmware commands and update existing ones.
- Add more firmware related structures and update existing ones.
- Some minor fixes, like adding missing \n to some prints.
Fix decoding of tf_rsp on amd64, and move TF_HAS_STACKREGS() to the
i386-only section, and fix a comment about the amd64 kernel trapframe
not having stackregs.
tf_rsp doesn't need decoding on amd64, but had an old clone of i386
code to do this in 1 place, and since the amd64 kernel trapframe does
have stackregs, the result was an off-by-16 error for %rsp in an error
message.
Statically initialize the run mode to the one that will become
current on first entry. This fixes a spurious "Stepping aborted"
message when the first entry is for a breakpoint.
Don't reset to the run mode to STEP_NONE when stopping, and remove
STEP_NONE. This mode was never really used, except transiently to
mis-decide whether to print the message on first entry.
While here, avoid using the old variable 'code' and remove it
in trap(). ('code' was meant for holding things like %dr6,
but is too small to hold %dr6 on amd64 and was reduced to an
obfuscation of tf_err, with early truncation on amd64.)
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