moving U-Boot specific code from libfdt.a to a new libuboot_fdt.a. This
needs to be a new library for linking to work correctly.
Differential Revision: https://reviews.freebsd.org/D1054
Reviewed by: ian, rpaulo (earlier version)
MFC after: 1 week
A new terminal_set_cursor() is added: it wraps the existing
teken_set_cursor() function.
In vtbuf_grow(), the cursor position is adjusted at the end of the
function. In vt_change_font(), we call terminal_set_cursor() just after
terminal_set_winsize_blank(), while the terminal is mute.
This fixes a bug where, after loading a kernel video driver which
increases the terminal window size, the cursor remains at its old
position, in other words, in the middle of the display content.
PR: 194421
MFC after: 1 week
hold the gpiobus lock between the gpio calls.
gpiobus_acquire_lock() now accepts a third parameter which tells gpiobus
what to do when the bus is already busy.
When GPIOBUS_WAIT wait is used, the calling thread will be put to sleep
until the bus became free.
With GPIOBUS_DONTWAIT the calling thread will receive EWOULDBLOCK right
away and then it can act upon.
This fixes the gpioiic(4) locking issues that arises when doing multiple
concurrent access on the bus.
of fuword(9) and suword(9). This makes the functions type-compatible
with volatile objects and does not require devolatile force, e.g. in
kern_umtx.c.
Requested by: bde
Reviewed by: jhb
Sponsored by: The FreeBSD Foundation
MFC after: 3 weeks
The check was recommened in the draft-ietf-ngtrans-mech-05.txt. But it isn't
clear, should it compare the source with all direct broadcast addresses in the
system or not.
RFC 4213 says it is enough to verify that the source address is the address
of the encapsulator, as configured on the decapsulator. And this verification
can be extended by administrator with any other forms of IPv4 ingress filtering.
Discussed with: glebius, melifaro
Sponsored by: Yandex LLC
The problem is that the __LINE__ macro is constant inside a macro and
results in identical assert statements when the compiler does not
support the static builtin assert function.
MFC: 3 days
Sponsored by: Mellanox Technologies
appropriately
Assert FILEDESC_XLOCK_ASSERT only for already used tables in fdgrowtable.
We don't have to call it with the lock held if we are just creating new
filedesc.
As a side note, strictly speaking processes can have fdtables with
fd_lastfile = -1, but then they cannot enter fdgrowtable. Very first file
descriptor they get will be 0 and the only syscall allowing to choose fd number
requires an active file descriptor. Should this ever change, we can add an 'init'
(or similar) parameter to fdgrowtable.
While here add 'fdused_init' which does not perform unnecessary work.
Drop FILEDESC_LOCK_ASSERT from fdisused and rely on callers to hold
it when appropriate. This function is only used with INVARIANTS.
No functional changes intended.
Test for file availability by fde_file != NULL instead of fdisused, this is
consistent with similar checks later.
Drop badfileops check. badfileops don't have DFLAG_PASSABLE set, so it was never
reached in practice.
fdiused is now only used in some KASSERTS, so ifdef it under INVARIANTS.
No functional changes.
This code has had an extensive rewrite and a good series of reviews, both by the author and other parties. This means a lot of code has been simplified. Pluggable structures for high-rate entropy generators are available, and it is most definitely not the case that /dev/random can be driven by only a hardware souce any more. This has been designed out of the device. Hardware sources are stirred into the CSPRNG (Yarrow, Fortuna) like any other entropy source. Pluggable modules may be written by third parties for additional sources.
The harvesting structures and consequently the locking have been simplified. Entropy harvesting is done in a more general way (the documentation for this will follow). There is some GREAT entropy to be had in the UMA allocator, but it is disabled for now as messing with that is likely to annoy many people.
The venerable (but effective) Yarrow algorithm, which is no longer supported by its authors now has an alternative, Fortuna. For now, Yarrow is retained as the default algorithm, but this may be changed using a kernel option. It is intended to make Fortuna the default algorithm for 11.0. Interested parties are encouraged to read ISBN 978-0-470-47424-2 "Cryptography Engineering" By Ferguson, Schneier and Kohno for Fortuna's gory details. Heck, read it anyway.
Many thanks to Arthur Mesh who did early grunt work, and who got caught in the crossfire rather more than he deserved to.
My thanks also to folks who helped me thresh this out on whiteboards and in the odd "Hallway track", or otherwise.
My Nomex pants are on. Let the feedback commence!
Reviewed by: trasz,des(partial),imp(partial?),rwatson(partial?)
Approved by: so(des)
- convert boot1.efi to corrrectly calculate the lba for what the
media reports and convert the size based on what FreeBSD uses.
The existing code would use the 512 byte lba and convert the
size using 4K byte size.
- make fsck_msdosfs read the boot block as 4K so the read doesn't
fail on a 4Kn drive since FreeBSD will error out parition reads
of a block. Make the bpbBytesPerSec check a multiple of 512 since
it can be 512 or 4K depending on the disk. This allows fsck to
pass checking the EFI partition on a 4Kn disk.
To create the EFI file system I used:
newfs_msdos -F 32 -S 4096 -c 1 -m 0xf8 <partition>
This works for booting 512 and 4Kn disks.
Caveat is that loader.efi cannot read the 4Kn EFI partition. This isn't
critical right now since boot1.efi will read loader.efi from the ufs
partition. It looks like loader.efi can be fixed via making some of the
512 bytes reads more flexible. loader.efi doesn't have trouble reading
the ufs partition. This is probably a simple fix.
I now have FreeBSD installed on a system with 4Kn drives and tested the
same code works on 512.
MFC after: 1 week
in the radeonkms driver.
Note: In PCI mode virtual addresses on the graphics card that map to system
RAM are translated to physical addresses by the graphics card itself. In
AGP mode address translation is done by the AGP chipset so fictitious
addresses appear on the system bus. For the CPU cache management to work
correctly when the CPU accesses this memory it needs to use the same
fictitious addresses (and let the chipset translate them) instead of using
the physical addresses directly.
Reviewed by: kib
MFC after: 1 month
When multicast capable interface goes away, it leaves multicast groups,
this leads to generate MLD reports, but MLD code does deffered send and
MLD reports are queued in the in6_multi's in6m_scq ifq. The problem is
that in6_multi structures are freed when interface leaves multicast groups
and thread that does deffered send will not take these queued packets.
PR: 194577
MFC after: 1 week
Sponsored by: Yandex LLC
to mount_nfs(8). They are implemented on Linux, OS X, and Solaris,
and thus can be expected to appear in automounter maps.
Reviewed by: rmacklem@
MFC after: 1 month
Sponsored by: The FreeBSD Foundation
without restarting whole lookup
Restart is only needed when fp was closed by current process, which is a much
rarer event than ref/deref by some other thread.
A read barrier was necessary because fd table pointer and table size were
updated separately, opening a window where fget_unlocked could read new size
and old pointer.
This patch puts both these fields into one dedicated structure, pointer to which
is later atomically updated. As such, fget_unlocked only needs data a dependency
barrier which is a noop on all supported architectures.
Reviewed by: kib (previous version)
MFC after: 2 weeks
This makes VMWare VAAI Thin Provisioning Stun primitive activate, pausing
the virtual machine, when backing storage (ZFS pool) is getting overflowed.
MFC after: 1 week
Sponsored by: iXsystems, Inc.
- Move the existing code to x86/x86/identcpu.c since it is x86-specific.
- If the CPUID2_HV flag is set, assume a hypervisor is present and query
the 0x40000000 leaf to determine the hypervisor vendor ID. Export the
vendor ID and the highest supported hypervisor CPUID leaf via
hv_vendor[] and hv_high variables, respectively. The hv_vendor[]
array is also exported via the hw.hv_vendor sysctl.
- Merge the VMWare detection code from tsc.c into the new probe in
identcpu.c. Add a VM_GUEST_VMWARE to identify vmware and use that in
the TSC code to identify VMWare.
Differential Revision: https://reviews.freebsd.org/D1010
Reviewed by: delphij, jkim, neel
unit 0.
It seems that this 'simplification' was copied to all GPIO drivers in tree.
This fix a bug where a GPIO controller could fail to attach its children
(gpioc and gpiobus) if another GPIO driver attach first.
initial MPA exchange must be tracked this way so that t4_tom's state for
the tid is all clean at the time the tid transitions to RDMA mode. Once
it does, t4_tom is out of the way and iw_cxgbe uses the qp endpoints
directly.
Sponsored by: Chelsio Communications
