aarch64: mi pmap: save a PTE software bit when doing modify emulation.
Use only OS_MODEMUL and release OS_MODIFIED. A mapping is deemed modified
if it is marked RW and OS_MODEMUL which only ever happens via emulation.
mi pmap: pmap_clear_attribute should check cached value of the attribute
The pmap_clear_attribute implementation used by the MI pmap should
check the cached valued of the attribute as well as any value held
in the PTE(s).
Some emulation implementations require this as some operations, e.g
changing page mappings to RO, can lose PTE attribute information.
gicv3_its: Fix ITT sizing.
The ITT being allocated did not match the size specified on the MAPD
command. This could cause hardware to read past the end of the ITT.
The old code used a fixed offset mapping scheme to assign eventIDs (the
eventID was derived from the LPI INTID). This scheme is wasteful and
doesn't scale well as the ITT is essentially an array of ITEs starting
with eventID 0. This change introduces per-deviceID namespaces for
eventIDs and allocates them starting with 0. A fixed number of eventIDs is
made available for each deviceID (MAXCPUS * 2). On a platform with an ITE
size of 8 bytes, this allows the ITT to fit in a single page.
The ITT is sized larger than the initial request as multiple requestors
could potentially share the same deviceID (this is the case for legacy PCI
devices behind a PCIe-to-PCI bridge).
The size parameter of the MAPD command now matches the allocated ITT.
Tested on QEMU KVM Virtual Machine and Ampere eMAG (Lenovo HR330A).
Explicitely check a pointer against NULL before computing a member address,
to avoid undefined behavior. Avoids the same NULL pointer check being
"optimised" later, leading to NULL pointer dereference.
It is expected that -fno-delete-null-pointer-checks would avoid this but
it does not.
For details see
https://mail-index.netbsd.org/tech-toolchain/2026/05/23/msg004818.html
and PR toolchain/60289
Needs pullup to netbsd-11.
callout(9): tweak
Don't change the name of the argument when explaining callout_pending.
Don't do manual "code hilighing".
Format the paper reference properly (and add missing information).
callout(9): Clarify previous language about clarity/efficiency.
And with that, I think I'm done touching up callout(9) for now.
PR kern/60288: callout(9) does not document callout_schedule()
callout(9): Prefer callout_setfunc/schedule more explicitly.
It is better on clarity grounds; the efficiency difference is really
quite minor.
Prompted by:
PR kern/60288: callout(9) does not document callout_schedule()
callout(9): Partially fix markup error in previous.
Tried to spell out that it will call func(arg) and forgot to fix it
before previous commit. Doesn't look right now but at least it is
not as thoroughly wrong as something that renders as Fa(func, arg).
(This is an invitation for our resident mdoc wizards to correct my
infelicities!)
PR kern/60288: callout(9) does not document callout_schedule()
callout(9): Clarify callout_schedule, _setfunc, and _reset.
Might be better to use .Bl -tag instead of paragraphs of prose too.
PR kern/60288: callout(9) does not document callout_schedule()
Map mode switch to "Command" for US keyboards.
This was necessary as mapping Command to mode swtich with wsconsctl discards
the Cmd1 setting and thus cannot be used to switch terminals.
mkimage: New `-C <config>' option.
Enables use for out-of-tree config files. We're not really
supporting this as a general-purpose tool but downstream users (like
me) may find this convenient to avoid local patches.
ld at virtio: Guard virtio_dequeue by virtio_vq_is_enqueued.
After triggering the DMA operation, or any previous virtio_dequeue,
virtio_vq_is_enqueued issues the necessary bus_dmamap_sync for
virtio_dequeue to observe any potential (new) result.
Normally this happens inside virtio(4) (in virtio_vq_intr) between
interrupt delivery and calling the virtqueue's done callback. But
polling mode I/O operations (and dump operations) don't take that
path, so it is necessary to call virtio_vq_is_enqueued explicitly.
PR kern/60182: ld at virtio sometimes hangs up
