kernel. We can register callbacks to perform the required operation on the
saved registers before returning.
This is initially used to work around a bug in old versions of QEMU that
trigger such an exception when reading from an ID register when it should
load z zero value.
I expect this could be used with other exception types, e.g. to emulate
special register access from userland.
Sponsored by: DARPA, AFRL
A new 'u_long *sv_hwcap' field is added to 'struct sysentvec'. A
process ABI can set this field to point to a value holding a mask of
architecture-specific CPU feature flags. If an ABI does not wish to
supply AT_HWCAP to processes the field can be left as NULL.
The support code for AT_EHDRFLAGS was already present on all systems,
just the #define was not present. This is a step towards unifying the
AT_* constants across platforms.
Reviewed by: kib
MFC after: 1 month
Differential Revision: https://reviews.freebsd.org/D12290
Enabled driver can be used on boards equipped with Marvell Armada 3700 SoC.
Submitted by: Patryk Duda <pdk@semihalf.com>
Obtained from: Semihalf
Sponsored by: Semihalf
Differential Revision: https://reviews.freebsd.org/D12256
Enabled driver can be used on boards equipped with Marvell Armada
3700/7k/8k SoCs.
Submitted by: Patryk Duda <pdk@semihalf.com>
Obtained from: Semihalf
Sponsored by: Semihalf
Differential Revision: https://reviews.freebsd.org/D12253
values. As not all assemblers understand the new ID_AA64MMFR2_EL1 register
add a macro to access it. This seems to be safe for older CPUs to read this
new register, with them returning zero.
Sponsored by: DARPA, AFRL
Marvell Armada 80x0/70x0 SoC family uses same RTC IP as
Armada 38x. This patch adds necessary files and enable driver in
GENERIC config.
Submitted by: Rafal Kozik <rk@semihalf.com>
Obtained from: Semihalf
Sponsored by: Semihalf
Differential Revision: https://reviews.freebsd.org/D12200
compatible string to check if the board is compatible with a given quirk.
It's possible this will be moved later, however as it's currently only used
by the MP code put it there.
So far the only instance of a quirk is when the list of CPUs may be
incorrect. This can happen on virtual machines with a hard coded
devicetree, but where the user may then set the number of CPUs as an
argument. This is the case on the ARM models so include the model specific
compat strings for these, including the spelling mistake found in some of
the OpenplatformPkg dtb files.
Sponsored by: DARPA, AFRL
The full system memory barrier around a TLB invalidation is stricter than
required. It needs to wait on accesses to main memory, with just the weaker
store variant before the invalidate. As such use the dsb istst, tlbi, dlb
ish sequence already used in pmap.
The tlbi instruction in this sequence is also unnecessarily using a
broadcast invalidate when it just needs to invalidate the local CPUs TLB.
Switch to a non-broadcast variant of this instruction.
Sponsored by: DARPA, AFRL
This helps simplify the code in kern_shutdown.c and reduces the number
of globally visible functions.
No functional change intended.
Reviewed by: cem, def
Sponsored by: Dell EMC Isilon
Differential Revision: https://reviews.freebsd.org/D11603
dump_start() and dump_finish() are responsible for writing kernel dump
headers, optionally writing the key when encryption is enabled, and
initializing the initial offset into the dump device.
Also remove the unused dump_pad(), and make some functions static now that
they're only called from kern_shutdown.c.
No functional change intended.
Reviewed by: cem, def
Sponsored by: Dell EMC Isilon
Differential Revision: https://reviews.freebsd.org/D11584
and sc_irq_length to the softc to handle the base number of IRQs available,
make gicv3_get_nirqs return the number of available interrupt IDs, and
limit which CPUs we send interrupts to based on the numa domain.
The last point is only strictly needed on a dual socket ThunderX where we
are unable to send MSI/MSI-X interrupts between sockets.
Sponsored by: DARPA, AFRL
Previously, debug exceptions were only enabled on the boot CPU if
DDB was enabled in the dbg_monitor_init() function. APs also called
this function, but since mp_machdep.c doesn't include opt_ddb.h, the
APs ended up calling an empty stub defined in <machine/debug_monitor.h>
instead of the real function. Also, if DDB was not enabled in the kernel,
the boot CPU would not enable debug exceptions.
Fix this by adding a new dbg_init() function that always clears the OS
lock to enable debug exceptions which the boot CPU and the APs call.
This function also calls dbg_monitor_init() to enable hardware breakpoints
from DDB on all CPUs if DDB is enabled. Eventually base support for
hardware breakpoints/watchpoints will need to move out of the DDB-only
debug_monitor.c for use by userland debuggers.
Reviewed by: andrew
Differential Revision: https://reviews.freebsd.org/D12001
Only fetch the VFP state from the CPU if the thread whose registers are
being requested is the current thread. If a stopped thread's registers
are being fetched by a debugger, the saved state in the PCB is already
valid.
Reviewed by: andrew
MFC after: 1 week
handle cases where they can only run on a single domain.
To allow all devices access to this set we need to move reading the domain
earlier in the boot as it was previously handled in the CPU driver, however
this is too late for the GICv3 ITS driver.
Sponsored by: DARPA, AFRL
multiple ITS devices, however we only want a single ITS device to be
configured on each CPU. To fix this only enable ITS when the node matches
the CPUs node.
Sponsored by: DARPA, AFRL
used to support the dual package ThunderX where we need to send MSI/MSI-X
interrupts to the same package as the device the interrupt came from.
Sponsored by: DARPA, AFRL
to demote it to 512 pages, then remove each of these. We can just remove
the l2 map directly. This is what the intel pmaps already do.
Sponsored by: DARPA, AFRL
were unneeded as we tell the tlb the pagetables are in cached memory. This
gives us a small, but statistically significant improvement over just
removing the PTE_SYNC cases.
While here remove PTE_SYNC, it's now unneeded.
Sponsored by: DARPA, AFRL
--Remove special-case handling of sparc64 bus_dmamap* functions.
Replace with a more generic mechanism that allows MD busdma
implementations to generate inline mapping functions by
defining WANT_INLINE_DMAMAP in <machine/bus_dma.h>. This
is currently useful for sparc64, x86, and arm64, which all
implement non-load dmamap operations as simple wrappers
around map objects which may be bus- or device-specific.
--Remove NULL-checked bus_dmamap macros. Implement the
equivalent NULL checks in the inlined x86 implementation.
For non-x86 platforms, these checks are a minor pessimization
as those platforms do not currently allow NULL maps. NULL
maps were originally allowed on arm64, which appears to have
been the motivation behind adding arm[64]-specific barriers
to bus_dma.h, but that support was removed in r299463.
--Simplify the internal interface used by the bus_dmamap_load*
variants and move it to bus_dma_internal.h
--Fix some drivers that directly include sys/bus_dma.h
despite the recommendations of bus_dma(9)
Reviewed by: kib (previous revision), marius
Differential Revision: https://reviews.freebsd.org/D10729
