Create two tests checking if we can read urgs registers and if the
rax register returns a correct number.
Reviewed by: markj
Discussed with: lwhsu
MFC after: 2 weeks
Differential Revision: https://reviews.freebsd.org/D20364
The registers in ilumos and FreeBSD have a different number.
In the illumos, last 32-bits register defined is SS an in FreeBSD is GS.
This off-by-one caused the uregs array to returns the wrong 64-bits register
on amd64.
Reviewed by: markj
MFC after: 2 weeks
Differential Revision: https://reviews.freebsd.org/D20363
vnode is no longer resident.
Mapping of tmpfs file does not bump use count on the vnode, because
backing object has swap type. As result, even during normal
operations, and of course on forced unmount, we might end up with text
mapping from tmpfs node which has no vnode in memory. In this case,
there is no v_writecount to clear (this was done during reclaim), and
no reason to assert that the vnode is present.
Restructure the code to silently ignore OBJ_SWAP objects with
OBJ_TMPFS_NODE flag set, but OBJ_TMPFS flag clear.
Reported and tested by: pho
Sponsored by: The FreeBSD Foundation
MFC after: 1 week
Both filesystems do no use vnode_pager_dealloc() which would handle
this case otherwise. Nullfs because vnode vm_object handle never
points to nullfs vnode. Tmpfs because its vm_object is never vnode
object at all.
Tested by: pho
Sponsored by: The FreeBSD Foundation
MFC after: 1 week
pci_alloc_msix() requires both the table and PBA BARs to be allocated
by the driver. ppt was only allocating the table BAR so would fail
for devices with the PBA in a separate BAR. Fix this by allocating
the PBA BAR before pci_alloc_msix() if it is stored in a separate BAR.
While here, release BARs after calling pci_release_msi() instead of
before. Also, don't call bus_teardown_intr() in error handling code
if bus_setup_intr() has just failed.
Reported by: gallatin
Tested by: gallatin
Reviewed by: rgrimes, markj
MFC after: 1 week
Differential Revision: https://reviews.freebsd.org/D20525
bhyve has to virtualize the MSI-X table to trap reads and writes to
that table and map those to virtual interrupts that it maps real host
interrupts on to. For the pending-bit-array (PBA), bhyve passes
accesses from the guest directly to the hardware.
bhyve's virtualization of the MSI-X table is done by intercepting all
reads and writes to the BAR holding the MSI-X table. However, if the
PBA is stored in the same BAR as the MSI-X table, accesses to the PBA
portion of this BAR have to be forwarded to the real BAR.
However, in the case that the PBA was stored in a separate BAR and
it's offset in that separate BAR overlapped with the portion of the
MSI-X table BAR that the table used, the handlers for the table BAR
would incorrectly think that some accesses were PBA reads and writes.
This caused a crash in bhyve when it indirected a NULL pointer. Fix
this case by never trying to handle PBA access if the PBA lives in a
separate BAR.
Reported by: gallatin
Tested by: gallatin
Reviewed by: markj, Patrick Mooney
MFC after: 1 week
Differential Revision: https://reviews.freebsd.org/D20523
The kernel has a limit of 131072 glyphs in a font; add the same check to
vtfontcvt so that we won't create a font file that the kernel will not
load.
PR: 205707
Submitted by: Dmitry Wagin
MFC after: 2 weeks
r348504 moved llvm-symbolizer from the CLANG_EXTRAS knob to CLANG, but
the man page was still in the CLANG_EXTRAS section in
OptionalObsoleteFiles.inc.
Reported by: jhb
MFC after: 3 days
MFC with: r348504
Unlike BUS_READ_IVAR / BUS_WRITE_IVAR, bus accessors do not have a
return code. It is assumed that there is a tight coupling between a bus
driver and a driver for a device on the bus with respect to instance
variables that the bus defines for its children. So, the driver is
supposed to have only valid accesses to the variables and, thus, the
accessors must always succeed.
Of course, programming errors sometimes happen. At present, such errors
go completely unnoticed. The idea of this change is to start catching
them. As a first step, there will be a warning about a failed accessor
call. This is to give developers a heads-up. I plan to replace the
printf with a KASSERT a week later, so that the warning is harder to
ignore.
Reviewed by: cem, imp, ian
MFC after: 2 weeks
Differential Revision: https://reviews.freebsd.org/D20458
Prior to this commit, if PCIEM_SLOT_STA_ABP and PCIEM_SLOT_STA_PDC are
asserted simultaneously, FreeBSD sets a 5 second "hardware going away" timer
and then processes the "presence detect" change. In the (physically
challenging) case that someone presses the "attention button" and inserts
a new PCIe device at exactly the same moment, this results in FreeBSD
recognizing that the device is present, attaching it, and then detaching it
5 seconds later.
On EC2 "bare metal" hardware this is the precise sequence of events which
takes place when a new EBS volume is attached; virtual machines have no
difficulty effecting physically implausible simultaneity.
This patch changes the handling of PCIEM_SLOT_STA_ABP to only detach a
device if the presence of a device was detected *before* the interrupt
which reports the Attention Button push.
Reported by: Matt Wilson
Reviewed by: jhb
MFC after: 1 week
Sponsored by: https://www.patreon.com/cperciva
Differential Revision: https://reviews.freebsd.org/D20499
After r348610 `make delete-old` was still removing llvm-ar and llvm-nm
(and associated man pages).
Reported by: jhb
Sponsored by: The FreeBSD Foundation
port number, properly access them by their IPv6 names.
This will make it easier to slice up and compile out address families
in the future.
No functional change intended.
MFC after: 6 weeks
The listed rules were incomplete and outdated. There is a much more
comprehensive comment in vm_page.h.
Reviewed by: alc, kib
MFC after: 1 week
Differential Revision: https://reviews.freebsd.org/D20503
This is like efi_devpath_match, but allows differing device media
paths. Those just specify the partition information.
Differential Revision: https://reviews.freebsd.org/D20513
This replaces some hand-rolled routines and is substantially faster
since libelftc uses a hash table for lookups and insertions, whereas
elfcopy would perform a linear scan of the table.
PR: 234949
Reviewed by: emaste
MFC after: 2 weeks
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D20473
When removing a section, we would loop over all sections looking for
a corresponding relocation section. With r348652 it is much faster
to just use elf_getscn().
PR: 234949
Reviewed by: emaste
MFC after: 2 weeks
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D20471
The tree is indexed by section number. This speeds up elf_getscn()
and its callers, which previously had to traverse a linked list. In
particular, since .shstrtab is often the last section in a file,
elf_strptr() would have to traverse the entire list.
PR: 234949
Reviewed by: emaste
MFC after: 2 weeks
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D20443
if a USB transfer is cancelled that we need to fake a completion event.
Implement missing support in ugen_fs_copy_out() to handle this.
This fixes issues with webcamd(8) and firefox.
MFC after: 3 days
Sponsored by: Mellanox Technologies
in the loss of a KASSERT that guarded against the invalidation a wired
mapping. Restore this KASSERT.
Remove an unnecessary KASSERT from pmap_demote_pde_locked(). It guards
against a state that was already handled at the start of the function.
Reviewed by: kib
X-MFC with: r348476
I believe this was introduced in the original '-r' commit, r231911 (2012).
At the time, the scope was limited to a 1 second sleep. r332518 (2018)
added '-R', which increased the potential duration of the affected interval
(from 1 to N seconds) by permitting arbitrary restart intervals.
Instead, handle SIGTERM normally during restart-sleep, when the monitored
process is not running, and shut down promptly.
(I noticed this behavior when debugging a child process that exited quickly
under the 'daemon -r -R 30' environment. 'kill <daemonpid>' had no
immediate effect and the monitor process slept until the next restart
attempt. This was annoying.)
Reviewed by: allanjude, imp, markj
Differential Revision: https://reviews.freebsd.org/D20509
After our migration (of certain architectures) to lld the kernel is built
with a unique build-ID. Make it available via a sysctl and uname(1) to
allow the user to identify their running kernel.
Submitted by: Ali Mashtizadeh <ali_mashtizadeh.com>
MFC after: 2 weeks
Relnotes: Yes
Event: Waterloo Hackathon 2019
Differential Revision: https://reviews.freebsd.org/D20326
To facilitate experimentation with LTO we require an ar that supports
LLVM IR, and to a lesser degree also an nm. As a first step always
install llvm-ar and llvm-nm.
Sponsored by: The FreeBSD Foundation
