after decoding the instruction matches the one provided by hardware.
Prior to r283293 'vie->num_valid' used to contain the actual length of
the instruction whereas now it contains the maximum instruction length
possible. This introduced a bug when calculating a RIP-relative base address.
Fix this by using 'vie->num_processed' rather than 'vie->num_valid' as the
length of the emulated instruction.
Reported and tested by: tychon
MFC after: 1 week
interpreter list to avoid the problem of holding a non-sleep lock during
a page fault as reported by witness. In addition, it consistently uses
memset()/memcpy() instead of bzero()/bcopy() except in the case where
bcopy() is required (i.e. overlapping copy).
Differential Revision: https://reviews.freebsd.org/D2123
Submitted by: sson
MFC after: 2 weeks
Relnotes: Yes
A hole block pointer can be encountered at any level and the hole
can cover multiple data blocks, but we are reading the data blocks
one by one, so we care only about the current one.
PR: 199804
Reported by: Toomas Soome <tsoome@me.com>
Submitted by: Toomas Soome <tsoome@me.com> (earlier version)
Tested by: Toomas Soome <tsoome@me.com>
MFC after: 11 days
This is done if the installation mode is not requested or auto-detected.
This is useful when a kernel has to be loaded from multiple disks.
For example from a RAID-Z pool or a ZFS pool with multiple top level
vdevs.
Differential Revision: https://reviews.freebsd.org/D2723
Reviewed by: neel
MFC after: 8 days
The intel 7260 driver under development requires this - the scans come
in as normal frames but with the frequency provided. The correct method
is to have the driver provide flags (so we can determine if it's 11b
or 11g); this will have to do in the meantime.
Without this, the channel found is 11b, and no ERP (ie "11g") bits
are negotiated with the AP.
This allows the 7260 in 2ghz mode to operate in 11bg, rather than
just 11b.
Tested:
* intel 7260 driver, 11bg channels
According to the manual page, '-m' should create the user home
directory, however rigorous testing suggests it does not, and
it is unclear if this is an implementation or expectation issue.
Sponsored by: The FreeBSD Foundation
logic is now placed in the mmap hook implementation rather than requiring
it to be placed in sys/vm/vm_mmap.c. This hook allows new file types to
support mmap() as well as potentially allowing mmap() for existing file
types that do not currently support any mapping.
The vm_mmap() function is now split up into two functions. A new
vm_mmap_object() function handles the "back half" of vm_mmap() and accepts
a referenced VM object to map rather than a (handle, handle_type) tuple.
vm_mmap() is now reduced to converting a (handle, handle_type) tuple to a
a VM object and then calling vm_mmap_object() to handle the actual mapping.
The vm_mmap() function remains for use by other parts of the kernel
(e.g. device drivers and exec) but now only supports mapping vnodes,
character devices, and anonymous memory.
The mmap() system call invokes vm_mmap_object() directly with a NULL object
for anonymous mappings. For mappings using a file descriptor, the
descriptors fo_mmap() hook is invoked instead. The fo_mmap() hook is
responsible for performing type-specific checks and adjustments to
arguments as well as possibly modifying mapping parameters such as flags
or the object offset. The fo_mmap() hook routines then call
vm_mmap_object() to handle the actual mapping.
The fo_mmap() hook is optional. If it is not set, then fo_mmap() will
fail with ENODEV. A fo_mmap() hook is implemented for regular files,
character devices, and shared memory objects (created via shm_open()).
While here, consistently use the VM_PROT_* constants for the vm_prot_t
type for the 'prot' variable passed to vm_mmap() and vm_mmap_object()
as well as the vm_mmap_vnode() and vm_mmap_cdev() helper routines.
Previously some places were using the mmap()-specific PROT_* constants
instead. While this happens to work because PROT_xx == VM_PROT_xx,
using VM_PROT_* is more correct.
Differential Revision: https://reviews.freebsd.org/D2658
Reviewed by: alc (glanced over), kib
MFC after: 1 month
Sponsored by: Chelsio
In this order, it won't try to recurse into a directory for which
it doesn't have permission, before changing that permission.
This follows an existing behavior in other BSDs, linux, OS X.
Obtained from: NetBSD
with the transmit params.
This allows raw 802.11 frames to be queued in the driver if necessary,
rather than requiring it to be direct-dispatched into the hardware.
Tested:
* ath(4), STA mode
* iwn(4), STA mode
MFC after: 2 weeks
Sponsored by: Norse Corp, Inc.
target. This effectively reverts r261142, which reverted both
r261031 and r261044.
Prodded by: jhb
MFC after: 1 week
Sponsored by: The FreeBSD Foundation
been generating both new (machine independent) and legacy version
entries (endianness sensitive).
The base system have been using the new format for quite some time,
so disable the generation by default.
An interim option, -l, have been added to re-enable old behavior.
The -l, -B and -L options are considered deprecated and will be
removed in FreeBSD 12.0 release.
802.11 mbufs.
The raw transmit path currently doesn't make it easy to queue
these frames:
* there's no node reference stored in the mbuf, like for the normal
path, and
* the bpf supplied raw transmit parameters (rate, rts/cts, etc)
are passed in as an argument, not as an mbuf tag.
In order to support driver queuing of these frames, we need to
be able to put the above into the mbuf before the driver gets it,
so the driver /can/ put it into a queue if needed.
Use an mbuf tag and for now just verbatim copy the bpf parameters
into it. Later on it may grow to include more options but this
will do for now.
Why would you want to queue raw frames? Well, in the case of
iwn(4), we can't send the firmware frames to transmit before
we hear a beacon - the firmware will consider passive channels
as unavailable until it hears a beacon. The firmware "passive"
channel state is cleared upon each RXON command, which is sent to
update association status. So, when we attempt association and
authorisation, the RXON command causes the firmware to clear out
what it's already seen, and so we have to wait for a beacon before
we can transmit.
Before people get overly excited - this alone doesn't "fix" 5GHz
operation - it just makes it (more) possible.
The aim here is to convert all the drivers over to use a raw_xmit()
API that doesn't include the node and params - instead they'd get
those from the mbuf. Then raw_xmit() becomes just a side-channel
version of the normal transmit path for management traffic.
MFC after: 2 weeks
Sponsored by: Norse Corp, Inc.
stability.
I'll re-enable it once the scan overhaul is done - the NIC itself
can do bgscan, but not how we're doing it.
MFC after: 2 weeks
Sponsored by: Norse Corp, Inc.
it takes a new argument allowing to specify the endianness of the database
to generate
Differential Revision: https://reviews.freebsd.org/D2730
Reviewed by: ian
softdep_sync() similarly to the regular vnode sync. Allow retry for
both vnode types.
Reported and tested by: pho
Sponsored by: The FreeBSD Foundation
MFC after: 1 week
up to 2 rx/tx queues for the 82574.
Program the 82574 to enable 5 msix vectors, assign 1 to each rx queue,
1 to each tx queue and 1 to the link handler.
Inspired by DragonFlyBSD, enable some RSS logic for handling tx queue
handling/processing.
Move multiqueue handler functions so that they line up better in a diff
review to if_igb.c
Always enqueue tx work to be done in em_mq_start, if unable to acquire
the TX lock, then this will be processed in the background later by the
taskqueue. Remove mbuf argument from em_start_mq_locked() as the work
is always enqueued. (stolen from igb)
Setup TARC, TXDCTL and RXDCTL registers for better performance and stability
in multiqueue and singlequeue implementations. Handle Intel errata 3 and
generic multiqueue behavior with the initialization of TARC(0) and TARC(1)
Bind interrupt threads to cpus in order. (stolen from igb)
Add 2 new DDB functions, one to display the queue(s) and their settings and
one to reset the adapter. Primarily used for debugging.
In the multiqueue configuration, bump RXD and TXD ring size to max for the
adapter (4096). Setup an RDTR of 64 and an RADV of 128 in multiqueue configuration
to cut down on the number of interrupts. RADV was arbitrarily set to 2x RDTR
and can be adjusted as needed.
Cleanup the display in top a bit to make it clearer where the taskqueue threads
are running and what they should be doing.
Ensure that both queues are processed by em_local_timer() by writing them both
to the IMS register to generate soft interrupts.
Ensure that an soft interrupt is generated when em_msix_link() is run so that
any races between assertion of the link/status interrupt and a rx/tx interrupt
are handled.
Document existing tuneables: hw.em.eee_setting, hw.em.msix, hw.em.smart_pwr_down, hw.em.sbp
Document use of hw.em.num_queues and the new kernel option EM_MULTIQUEUE
Thanks to Intel for their continued support of FreeBSD.
Reviewed by: erj jfv hiren gnn wblock
Obtained from: Intel Corporation
MFC after: 2 weeks
Relnotes: Yes
Sponsored by: Limelight Networks
Differential Revision: https://reviews.freebsd.org/D1994
