Michal Meloun [Wed, 27 Jan 2021 11:45:32 +0000 (12:45 +0100)]
pci_dw_mv: Don't enable unhandled interrupts.
Mainly link errors interrupts should only be activated on fully linked port,
otherwise noise on lanes can cause livelock. But we don't have error
counters yet, so leave these interrupts disabled.
Marcin Wojtas [Wed, 24 Feb 2021 17:02:40 +0000 (18:02 +0100)]
mvebu_gpio: fix interrupt cause register configuration
According to Armada 8k documentation, the interrupt cause register
(at offset 0x14) is RW0C. Update the configuration in attach and
the mvebu_gpio_isrc_eoi() to follow the description.
Michal Meloun [Sun, 17 Oct 2021 17:36:33 +0000 (19:36 +0200)]
arm: Fix handling of undefined instruction aborts in THUMB2 mode.
Correctly recognize NEON/SIMD and VFP instructions in THUMB2 mode and pass
these to the appropriate handler. Note that it is not necessary to filter
all undefined instruction variant or register combinations, this is a job
for given handler.
Michal Meloun [Thu, 7 Oct 2021 18:42:56 +0000 (20:42 +0200)]
dwmmc: Calculate the maximum transaction length correctly.
We should reserve two descriptors (not MMC_SECTORS) for potentially
unaligned (so bounced) buffer fragments, one for the starting fragment
and one for the ending fragment.
Michal Meloun [Fri, 2 Jul 2021 18:17:36 +0000 (20:17 +0200)]
intrng: Releasing interrupt source should clear interrupt table full state.
The first release of an interrupt in a situation where the interrupt table
is full should schedule a full table check the next time an interrupt is
allocated. A full check is necessary to ensure maximum separation between
the order of allocation and the order of release.
Joerg Wunsch [Mon, 20 Dec 2021 09:17:57 +0000 (10:17 +0100)]
usbconfig: documentation fixes, mainly for -i option
* in usage(), clearly mark -i interface as optional
* both, -u busnum and -a devaddr are optional as well
* various minor man page fixes
* clearly mark those two commands that actually use -i ifaceidx
* remove unused bitfield tag got_iface
* fix indentation level according to review comment
Joerg Wunsch [Sun, 19 Dec 2021 22:49:23 +0000 (23:49 +0100)]
usbconfig: use getopt(3) for option handling
This makes option handling consistent with other utilities as well as
Posix rules. By that, it's no longer important whether option name and
its argument are separated by a space or not, so -d5.3 works the same
as -d 5.3.
Also, recognize either /dev/ugen or ugen as prefix to the -d argument.
Note that this removes the undocumented feature that allowed to
specify multiple -d n.m options interleaved with commands referring to
that particular device in a single run.
Alan Somers [Thu, 2 Dec 2021 02:38:04 +0000 (19:38 -0700)]
fusefs: in the tests, always assume debug.try_reclaim_vnode is available
In an earlier version of the revision that created that sysctl (D20519)
the sysctl was gated by INVARIANTS, so the test had to check for it.
But in the committed version it is always available.
fusefs: fix .. lookups when the parent has been reclaimed.
By default, FUSE file systems are assumed not to support lookups for "."
and "..". They must opt-in to that. To cope with this limitation, the
fusefs kernel module caches every fuse vnode's parent's inode number,
and uses that during VOP_LOOKUP for "..". But if the parent's vnode has
been reclaimed that won't be possible. Previously we paniced in this
situation. Now, we'll return ESTALE instead. Or, if the file system
has opted into ".." lookups, we'll just do that instead.
This commit also fixes VOP_LOOKUP to respect the cache timeout for ".."
lookups, if the FUSE file system specified a finite timeout.
Alan Somers [Mon, 29 Nov 2021 02:17:34 +0000 (19:17 -0700)]
Fix a race in fusefs that can corrupt a file's size.
VOPs like VOP_SETATTR can change a file's size, with the vnode
exclusively locked. But VOPs like VOP_LOOKUP look up the file size from
the server without the vnode locked. So a race is possible. For
example:
1) One thread calls VOP_SETATTR to truncate a file. It locks the vnode
and sends FUSE_SETATTR to the server.
2) A second thread calls VOP_LOOKUP and fetches the file's attributes from
the server. Then it blocks trying to acquire the vnode lock.
3) FUSE_SETATTR returns and the first thread releases the vnode lock.
4) The second thread acquires the vnode lock and caches the file's
attributes, which are now out-of-date.
Fix this race by recording a timestamp in the vnode of the last time
that its filesize was modified. Check that timestamp during VOP_LOOKUP
and VFS_VGET. If it's newer than the time at which FUSE_LOOKUP was
issued to the server, ignore the attributes returned by FUSE_LOOKUP.
Corvin Köhne [Mon, 3 Jan 2022 13:19:39 +0000 (14:19 +0100)]
bhyve: add more slop to 64 bit BARs
Bhyve allocates small 64 bit BARs below 4 GB and generates ACPI tables
based on this allocation. If the guest decides to relocate those BARs
above 4 GB, it could lead to mismatching ACPI tables. Especially
when using OVMF with enabled bus enumeration it could cause
issues. OVMF relocates all 64 bit BARs above 4 GB. The guest OS
may be unable to recover from this situation and disables some PCI
devices because their BARs are located outside of the MMIO space
reported by ACPI. Avoid this situation by giving the guest more
space for relocating BARs.
Let's be paranoid. The available space for BARs below 4 GB is 512 MB
large. Use a slop of 512 MB. It'll allow the guest to relocate all
BARs below 4 GB to an address above 4 GB. We could run into issues
when we exceeding the memlimit above 4 GB. However, this space has
a size of 32 GB. Even when using many PCI device with large BARs
like framebuffer or when using multiple PCI busses, it's very
unlikely that we run out of space due to the large slop.
Additionally, this situation will occur on startup and not at runtime
which is much better.
Corvin Köhne [Mon, 3 Jan 2022 13:18:31 +0000 (14:18 +0100)]
bhyve: allow reading of fwctl signature multiple times
At the moment, you only have one single chance to read the fwctl
signature. At boot bhyve is in the state IDENT_WAIT. It's then
possible to switch to IDENT_SEND. After bhyve sends the signature,
it switches to REQ. From now on it's impossible to switch back to
IDENT_SEND to read the signature. For that reason, only a single
driver can read the signature. A guest can't use two drivers to
identify that fwctl is present. It gets even worse when using
OVMF. OVMF uses a library to access fwctl. Therefore, every single
OVMF driver would try to read the signature. Currently, only a
single OVMF driver accesses the fwctl. So, there's no issue with
it yet. However, no OS driver would have a chance to detect fwctl when
using OVMF because it's signature was already consumed by OVMF.
Corvin Köhne [Mon, 3 Jan 2022 13:16:59 +0000 (14:16 +0100)]
bhyve: enumerate BARs by size
E.g. Framebuffers can require large space and BARs need to be aligned
by their size. If BARs aren't allocated by size, it'll cause much
fragmentation of the MMIO space. Reduce fragmentation by ordering
the BAR allocation on their size to reduce the risk of
OUT_OF_MMIO_SPACE issues.
Bjoern A. Zeeb [Mon, 10 Jan 2022 22:12:53 +0000 (22:12 +0000)]
LinuxKPI: 802.11 fix locking in lkpi_stop_hw_scan()
In lkpi_stop_hw_scan() we have to unlock around cancelling the
hardware scan and an msleep to wait for the confirmation that the
scan ended. Otherwise we are sleeping with the non-sleepable
net80211 com lock held. At the same time we need to hold the lhw
lock for the msleep().
This lock change got lost in the refactoring of lkpi_iv_newstate().
Reported by: ambrisko, delphij
PR: 261075
Sponsored by: The FreeBSD Foundation
Bjoern A. Zeeb [Sun, 9 Jan 2022 02:21:05 +0000 (02:21 +0000)]
LinuxKPI / iwlwifi: fix spelling of constants
Fix the spelling of IEEE80211_HE_PHY_CAP9_NOMINAL_PKT_PADDING_*
(was "NOMIMAL"). The original version came from iwlwifi
in iwlwifi-next. Other drivers (from wireless-testing) already
use the correct spelling and need this change in LinuxKPI.
We never initialized hw->conf.flags for IEEE80211_CONF_IDLE but
on set_channel we would clear it and announce a change.
This lead to a problem that drivers may do some work every time
which was not needed and may lead to unexpected behaviour (for no
better driver code).
Properly initialize conf.flags with IEEE80211_CONF_IDLE.
Factor out the toggling into a function and clear IDLE while
sw scanning and when associated and set again when scan ends
or we are bouncing out of assoc.
Bjoern A. Zeeb [Sun, 9 Jan 2022 01:12:05 +0000 (01:12 +0000)]
LinuxKPI: bitfields add more *replace_bits()
Add or extend the already existing *_replace_bits() implementations
using macros as we do for the other parts in the file for
le<n>p_replace_bits(), u<n>p_replace_bits(), and _u<n>_replace_bits().
Mark Johnston [Thu, 16 Dec 2021 21:07:04 +0000 (16:07 -0500)]
fd: Avoid truncating output buffers for KERN_PROC_{CWD,FILEDESC}
These sysctls failed to return an error if the caller had provided too
short an output buffer. Change them to return ENOMEM instead, to ensure
that callers can detect truncation in the face of a concurrently
changing fd table.
Colin Percival [Thu, 30 Dec 2021 19:47:50 +0000 (11:47 -0800)]
Fix variable name: freq_khz -> freq
An earlier version of this code computed the TSC frequency in kHz.
When the code was changed to compute the frequency more accurately,
the variable name was not updated.
Corvin Köhne [Mon, 22 Nov 2021 15:26:03 +0000 (16:26 +0100)]
bhyve: keep physical and virtual COMMAND reg in sync
On startup all virtual BARs are registered.
Additionally, the encoding bit in the virtual cmd register is set.
After that, the passthru emulation overwrites the virtual cmd register with
the physical one.
This could lead to a mismatch between registered BARs and the encoding
bits in the cmd register.
Instead of writing the physical to the virtual cmd register,
write the virtual to the physical cmd register to solve this issue.
Corvin Köhne [Mon, 22 Nov 2021 15:22:48 +0000 (16:22 +0100)]
bhyve: move 64 bit BAR location to match OVMF assumptions
OVMF will fail, if large 64 bit BARs are used. GCD-Map doesn't cover
64 bit addresses of BARs.
OVMF assumes that 64 bit addresses of BARS are located on next 32 GB
boundary behind Top of High RAM.
This patch moves 64 bit BARs on next 32 GB boundary behind Top of High
RAM to match OVMF assumptions.
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