- We can exit the loop as soon as the filter check passes.
- The alignment check has already passed so there is no need to also run
it here.
Sponsored by: Innovate UK
We need to use a bounce buffer when the memory we are operating on is not
aligned to a cacheline, and not aligned to the maps alignment.
The former is to stop other threads from dirtying the cacheline while we
are performing DMA operations with it. The latter is to check memory
passed in by a driver is correctly aligned for the device.
Reviewed by: mmel
Sponsored by: Innovate UK
Differential Revision: https://reviews.freebsd.org/D26496
This will ensure nothing modifies the cacheline while DMA is in progress
so we won't need to bounce the data.
Reviewed by: mmel
Sponsored by: Innovate UK
Differential Revision: https://reviews.freebsd.org/D26495
Use it to decide if we can skip cache management.
While here remove the DMAMAP_COULD_BOUNCE flag as it's unneeded.
Reviewed by: mmel
Sponsored by: Innovate UK
Differential Revision: https://reviews.freebsd.org/D26494
Add helper functions to the arm64 busdma for common cases of checking if
we may need to bounce, and if we must bounce for a given address.
These will be expanded later as we handle cache-misaligned memory.
Reported by: mmel
Sponsored by: Innovate UK
Differential Revision: https://reviews.freebsd.org/D26493
On Ampere Altra systems, the sparse population of RAM within the
physical address space causes the vm_page_dump bitmap to be much
larger than necessary, increasing the size from ~8 Mib to > 2 Gib
(and overflowing `int` for the size).
Changing the page dump bitmap also changes the minidump file
format, so changes are also necessary in libkvm.
Reviewed by: jhb
Approved by: scottl (implicit)
MFC after: 1 week
Sponsored by: Ampere Computing, Inc.
Differential Revision: https://reviews.freebsd.org/D26131
These definitions were repeated by all architectures, with small
variations. Consolidate the common definitons in machine
independent code and use bitset(9) macros for manipulation. Many
opportunities for deduplication remain in the machine dependent
minidump logic. The only intended functional change is increasing
the bit index type to vm_pindex_t, allowing the indexing of pages
with address of 8 TiB and greater.
Reviewed by: kib, markj
Approved by: scottl (implicit)
MFC after: 1 week
Sponsored by: Ampere Computing, Inc.
Differential Revision: https://reviews.freebsd.org/D26129
pmap_update_entry() will temporarily clear the valid bit of page table
entries in order to satisfy the arm64 pmap's break-before-make
constraint. pmap_kextract() may operate concurrently on kernel page
table pages, introducing windows where the assertions added in r365879
may fail incorrectly since they implicitly assert that the valid bit is
set. Modify the assertions to handle this.
Reviewed by: andrew, mmel (previous version)
Reviewed by: alc, kib
Reported by: mmel, scottph
MFC with: r365879
Due to a HW bug in the RockChip PCIe implementation, attempting to access
a non-existent register in the configuration space will throw an exception.
Use new bus functions bus_peek() and bus_poke() to overcomme this limitation.
One problem with the bus_space_read_N() and bus_space_write_N() family of
functions is that they provide no protection against exceptions which can
occur when no physical hardware or device responds to the read or write
cycles. In such a situation, the system typically would panic due to a
kernel-mode bus error. The bus_space_peek_N() and bus_space_poke_N() family
of functions provide a mechanism to handle these exceptions gracefully
without the risk of crashing the system.
Typical example is access to PCI(e) configuration space in bus enumeration
function on badly implemented PCI(e) root complexes (RK3399 or Neoverse
N1 N1SDP and/or access to PCI(e) register when device is in deep sleep state.
This commit adds a real implementation for arm64 only. The remaining
architectures have bus_space_peek()/bus_space_poke() emulated by using
bus_space_read()/bus_space_write() (without exception handling).
MFC after: 1 month
Reviewed by: kib
Differential Revision: https://reviews.freebsd.org/D25371
that can be extended, but also ensure compile-time type checking. Refactor
common code out of arch-specific implementations. Move the mpr and mps
drivers to this new API. The template type remains visible to the consumer
so that it can be allocated on the stack, but should be considered opaque.
As the pl061 driver can be an interrupt controller attach it earlier in the
boot so other drivers can use it.
Use a new GPIO xref to not conflict with the existing root interrupt
controller.
Sponsored by: Innovate UK
Expose some of the new HWCAP features added in r65304. This includes the
addition of elf_hwcap2 into the sysvec, and a separate function to parse
for those features.
This only exposes features which require no further configuration, e.g.
indicating the presence of certain instructions. Larger features (SVE)
will not be advertised until we actually support them. The exact list of
features/extensions this patch exposes is:
- ARMv8.0-DGH
- ARMv8.0-SB
- ARMv8.2-BF16
- ARMv8.2-DCCVADP
- ARMv8.2-I8MM
- ARMv8.4-LRCPC
- ARMv8.5-CondM
- ARMv8.5-FRINT
- ARMv8.5-RNG
- PSTATE.SSBS
While here, annotate elf_hwcap and elf_hwcap2 as __read_frequently, and
move the declarations to the machine/md_var.h header.
Submitted by: mikael@ (D22314 portion)
MFC after: 2 weeks
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D26031
Differential Revision: https://reviews.freebsd.org/D22314
FreeBSD exports CPU features as bits in the AT_HWCAP and AT_HWCAP2
vectors via elf_aux_info(3). This interface is similar to getauxval(3)
on Linux, and for simplicity to consumers we try to maintain an
identical set of feature flags on arm64.
The first batch of AT_HWCAP flags were added in r350166, corresponding
to definitions that already existed in Linux. Unfortunately, one flag
was missed, and a portion of the values are shifted one bit to the right
as a result.
Add the missing definition for HWCAP_ASIMDHP, and adjust the affected
values to match their Linux counterparts.
Although this is an ABI-breaking change, there is no plan to provide
compat code for old binaries. An audit of our ports tree and other
software via Debian code search indicates that there are not yet any
consumers of this interface for FreeBSD/arm64.
Bump __FreeBSD_version to be on the safe side, in case compat code needs
to be added in the future.
Reviewed by: emaste, manu
MFC after: 2 weeks
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D26329
A PL061 is a simple 8 pin GPIO controller. This GPIO device is used to
signal an internal request for shutdown on some virtual machines including
Arm-based Amazon EC2 instances.
Submitted by: Ali Saidi <alisaidi_amazon.com> (previouss version)
Reviewed by: Ali Saidi, manu
Differential Revision: https://reviews.freebsd.org/D24065
Allwinner USB DRD is based on the Mentor USB OTG controller, with a
different register layout and a few missing registers.
The code is by Andrew Turner (andrew).
Reviewed by: hselasky, manu
Obtained from: andrew
MFC after: 5 weeks
Differential Revision: https://reviews.freebsd.org/D5881
This is in sync with what is defined for Linux 5.8. Note that all bits
in HWCAP are exhausted, and HWCAP2 has been added.
This also revealed an error in some of the existing definitions. We are
missing HWCAP_ASIMDHP, and as a result a portion of the HWCAP values are
shifted right by one bit. This will be fixed in an upcoming change, but
the values being added now are compatible with what Linux defines.
Reviewed by: emaste, markj, manu
MFC after: 1 week
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D26030
We don't need these pagetables after the early boot. Remove the chance we
write to memory we didn't expect to and remove architectural undefined
behaviour.
Reviewed by: alc (earlier version), mmel
Sponsored by: Innovate UK
Differential Revision: https://reviews.freebsd.org/D22606
Currently we use a single bit to indicate whether the virtual page is
part of a superpage. To support a forthcoming implementation of
non-transparent 1GB superpages, it is useful to provide more detailed
information about large page sizes.
The change converts MINCORE_SUPER into a mask for MINCORE_PSIND(psind)
values, indicating a mapping of size psind, where psind is an index into
the pagesizes array returned by getpagesizes(3), which in turn comes
from the hw.pagesizes sysctl. MINCORE_PSIND(1) is equal to the old
value of MINCORE_SUPER.
For now, two bits are used to record the page size, permitting values
of MAXPAGESIZES up to 4.
Reviewed by: alc, kib
Sponsored by: Juniper Networks, Inc.
Sponsored by: Klara, Inc.
Differential Revision: https://reviews.freebsd.org/D26238
This allows privileged userspace processes to find information about the
physical page backing a given mapping. It is useful in applications
such as DPDK which perform some of their own memory management.
Reviewed by: kib, jhb (previous version)
MFC after: 2 weeks
Sponsored by: Juniper Networks, Inc.
Sponsored by: Klara Inc.
Differential Revision: https://reviews.freebsd.org/D26237
This whitespace was intentionally added to help differentiate the different
register groups within this file.
While here add missing whitespace from earlier in the file,
Sponsored by: Innovate UK
When enabling the MMU on arm64 we need to ensure the tlb invalidation has
completed before setting the enable bit in the SCTLR register.
Reported by: alc
Sponsored by: Innovate UK
Add support for stage 2 pmap to pmap_pte_dirty, pmap_release, and more
of pmap_enter. This adds support in all placess I have hit while testing
bhyve ehile faulting pages in as needed.
Sponsored by: Innovate UK
Differential Revision: https://reviews.freebsd.org/D26065
The Ampere Altra has physical memory populated sparsely within the
physical address space. Increase the size of the dmap to cover all
physical memory.
Reviewed by: andrew
Approved by: scottl (implicit)
MFC after: 1 week
Sponsored by: Ampere Computing, Inc.
Differential Revision: https://reviews.freebsd.org/D26134
Add a synchronizing instruction to flush and wait until the local
CPU's writes are observable to other CPUs before sending IPIs.
This fixes an issue where recipient CPUs doing a rendezvous could
enter the rendezvous handling code before the initiator's writes
to the smp_rv_* variables were visible. This manifested as a
system hang, where a single CPU's increment of smp_rv_waiters[0]
actually happened "before" the initiator's zeroing of that field,
so all CPUs were stuck with the field appearing to be at
ncpus - 1.
Reviewed by: andrew, markj
Approved by: scottl (implicit)
MFC after: 1 week
Sponsored by: Ampere Computing, Inc.
Differential Revision: https://reviews.freebsd.org/D25798
Currently, we parse notes for the values of ELF FreeBSD feature flags
and osrel. Knowing these values, or knowing that image does not carry
the note if pointers are NULL, is useful to decide which ABI variant
(brand) we want to activate for the image.
Right now this is only a plumbing change
Tested by: pho
Sponsored by: The FreeBSD Foundation
Differential revision: https://reviews.freebsd.org/D25273
According to the ARM Design Document "IO Remapping Table Platform"
(DEN 0049D), the "Number of IDs" field of the ID mapping format means
"The number of IDs in the range minus one".
Submitted by: Greg V <greg@unrelenting.technology>
Reviewed by: andrew
Differential Revision: https://reviews.freebsd.org/D25179
Those messages were printed hundreds of times during boot, often multiple
times for each table. We already print information about the tables in
more organized form once to not duplicate it when random ACPI drivers are
attaching.
MFC after: 1 week
This is a step towards facilitating jails with only Linux binaries.
Supporting emul_path adds path lookups which are completely spurious
if the binary at hand runs in a Linux-based root directory.
It defaults to on (== current behavior).
make -C /root/linux-5.3-rc8 -s -j 1 bzImage:
use_emul_path=1: 101.65s user 68.68s system 100% cpu 2:49.62 total
use_emul_path=0: 101.41s user 64.32s system 100% cpu 2:45.02 total
The hard work of parsing fields per-CPU, handling heterogeneous
features, and excluding features from userspace is already done by
update_special_regs. We can build our set of HWCAPs from the result.
This exposed a small bug in update_special_regs, in which the
generated bitmask was not wide enough, and as a result some bits
weren't being exposed in user_cpu_desc. Fix this.
While here, adjust some formatting.
Reviewed by: andrew
MFC after: 2 weeks
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D26069
This adds definitions for the latest additions to the AA64ISAR[01] ID
registers. This brings these registers in sync with ARMv8.6 initial spec
release.
An future change will parse many of these fields for HWCAP features.
Reviewed by: andrew, manu, markj (all previous versions)
MFC after: 2 weeks
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D26029
This adds support for the Cortex-A76 and Neoverse-N1 PMU counters to pmc.
While here add more PMCR_IDCODE values and check the implementers code is
correct before setting the PMU type.
Reviewed by: bz, emaste (looks reasonable to me)
Sponsored by: Innovate UK
Differential Revision: https://reviews.freebsd.org/D25959
- Do not rely on U-Boot for clocks configuration, enable and set frequencies
in the driver's attach method.
- Adjust MAC settings according to detected linespeed on RK3399 and RK3328.
- Add support for RMII PHY mode on RK3328.
Reviewed by: manu
Differential Revision: https://reviews.freebsd.org/D26006
Ethernet clocks on RK3328 are controlled by SYSCON registers, so add
RK_CLK_COMPOSITE_GRF flag to indicate that clock node should access grf
registers instead of CRU's
Reviewed by: manu
Differential Revision: https://reviews.freebsd.org/D25918
APEI allows platform to report different kinds of errors to OS in several
ways. We've found that Supermicro X10/X11 motherboards report PCIe errors
appearing on hot-unplug via this interface using NMI. Without respective
driver it ended up in kernel panic without any additional information.
This driver introduces support for the APEI Generic Hardware Error Source
reporting via NMI, SCI or polling. It decodes the reported errors and
either pass them to pci(4) for processing or just logs otherwise. Errors
marked as fatal still end up in kernel panic, but some more informative.
When somebody get to native PCIe AER support implementation both of the
reporting mechanisms should get common error recovery code. Since in our
case errors happen when the device is already gone, there is nothing to
recover, so the code just clears the error statuses, practically ignoring
the otherwise destructive NMIs in nicer way.
MFC after: 2 weeks
Relnotes: yes
Sponsored by: iXsystems, Inc.
Being able to use tmpfs without kernel modules is very useful when building
small MFS_ROOT kernels without a real file system.
Including TMPFS also matches arm/GENERIC and the MIPS std.MALTA configs.
Compiling TMPFS only adds 4 .c files so this should not make much of a
difference to NO_MODULES build times (as we do for our minimal RISC-V
images).
Reviewed By: br (earlier version for riscv), brooks, emaste
Differential Revision: https://reviews.freebsd.org/D25317
This new function allows us to find the SMMU instance assigned
for a particular PCI RID.
Reviewed by: andrew
Sponsored by: DARPA, AFRL
Differential Revision: https://reviews.freebsd.org/D25687
This removes SCTP from in-tree kernel configuration files. Now, SCTP
can be enabled by simply loading the module, as discussed on
freebsd-net@.
Reviewed by: tuexen
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D25611
It can be useful to get a dump of all registers when investigating why we
received an exception that we are unable to handle. In these cases we
already call panic, however we don't always print the registers.
Add calls to print_registers and print esr and far when applicable.
Sponsored by: Innovate UK
The EIP-97 is a packet processing module found on the ESPRESSObin. This
commit adds a crypto(9) driver for the crypto and hash engine in this
device. An initial skeleton driver that could attach and submit
requests was written by loos and others at Netgate, and the driver was
finished by me.
Support for separate AAD and output buffers will be added in a separate
commit, to simplify merging to stable/12 (where those features don't
exist).
Reviewed by: gnn, jhb
Feedback from: andrew, cem, manu
MFC after: 1 week
Sponsored by: Rubicon Communications, LLC (Netgate)
Differential Revision: https://reviews.freebsd.org/D25417
On architectures that use RELA relocations it is safe to rerun the ifunc
resolvers on after all CPUs have started, but while they are sill parked.
On arm64 with big.LITTLE this is needed as some SoCs have shipped with
different ID register values the big and little clusters meaning we were
unable to rely on the register values from the boot CPU.
Add support for rerunning the resolvers on arm64 and amd64 as these are
both RELA using architectures.
Reviewed by: kib
Sponsored by: Innovate UK
Differential Revision: https://reviews.freebsd.org/D25455
The functions to read the common user and kernel ID registers should be
in cpu.h rather than undefined.h as they are related to CPU details and
used by undefined instruction handlers.
Sponsored by: Innovate UK
Also move parsing the registers to just after the secondary CPUs have
started. This means the kernel register view from all CPUs is available
after the CPU SYSINITs have finished, e.g. for use by ifunc resolvers.
Sponsored by: Innovate UK
Differential Revision: https://reviews.freebsd.org/D25505
- Add CCM driver and clocks implementations for i.MX 8M
- Add GPC driver for iMX8
- Add clock tree for i.MX 8M Quad
- Add clocks support and new compat strings (where required) for existing i.MX 6 UART, I2C, and GPIO drivers
- Enable aarch64-compatible drivers form i.MX 6 in arm64 GENERIC kernel config
- Add dtb/imx8 kernel module with DTBs for Nitrogen8M and iMX8MQ EVK
With this patch both Nitrogen8M and iMX8MQ EVK boot with NFS root up to multiuser login prompt
Reviewed by: manu
Differential Revision: https://reviews.freebsd.org/D25274
In preparation for using ifuncs in the kernel is is useful to have a common
view of the arm64 ID registers across all CPUs. Add this and extract the
logic for finding the lower value of two fields to a new helper function.
Sponsored by: Innovate UK
Differential Revision: https://reviews.freebsd.org/D25463
This effectively mirrors our libc implementation, but with minor fudging --
name needs to be copied in from userspace, so we just copy it straight into
stack-allocated memfd_name into the correct position rather than allocating
memory that needs to be cleaned up.
The sealing-related fcntl(2) commands, F_GET_SEALS and F_ADD_SEALS, have
also been implemented now that we support them.
Note that this implementation is still not quite at feature parity w.r.t.
the actual Linux version; some caveats, from my foggy memory:
- Need to implement SHM_GROW_ON_WRITE, default for memfd (in progress)
- LTP wants the memfd name exposed to fdescfs
- Linux allows open() of an fdescfs fd with O_TRUNC to truncate after dup.
(?)
Interested parties can install and run LTP from ports (devel/linux-ltp) to
confirm any fixes.
PR: 240874
Reviewed by: kib, trasz
Differential Revision: https://reviews.freebsd.org/D21845
For 1000Mb mode to work reliably TX/RX delays need to be configured
between the TX/RX clock and the respective signals on the PHY
to compensate for differing trace lengths on the PCB.
Reviewed by: manu
MFC after: 1 week
AcpiOsMapMemory is used for device memory when e.g. an _INI method wants
to access physical memory, however, aarch64 pmap_mapbios is hardcoded to
writeback. Search for the correct memory type to use in pmap_mapbios.
Submitted by: Greg V <greg_unrelenting.technology>
Differential Revision: https://reviews.freebsd.org/D25201
in vanilla Linux git tree.
Reviewed by: markj
MFC after: 2 weeks
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D25385
It turns out relocating the symbol table itself can cause issues, like fbt
crashing because it applies the offsets to the kernel twice.
This had been previously brought up in rS333447 when the stoffs hack was
added, but I had been unaware of this and reimplemented symtab relocation.
Instead of relocating the symbol table, keep track of the relocation base
in ddb, so the ddb symbols behave like the kernel linker-provided symbols.
This is intended to be NFC on platforms other than PowerPC, which do not
use fully relocatable kernels. (The relbase will always be 0)
* Remove the rest of the stoffs hack.
* Remove my half-baked displace_symbol_table() function.
* Extend ddb initialization to cope with having a relocation offset on the
kernel symbol table.
* Fix my kernel-as-initrd hack to work with booke64 by using a temporary
mapping to access the data.
* Fix another instance of __powerpc__ that is actually RELOCATABLE_KERNEL.
* Change the behavior or X_db_symbol_values to apply the relocation base
when updating valp, to match link_elf_symbol_values() behavior.
Reviewed by: jhibbits
Sponsored by: Tag1 Consulting, Inc.
Differential Revision: https://reviews.freebsd.org/D25223
FreeBSD madvise(2) directly. While some of the flag values match,
most don't.
PR: kern/230160
Reported by: markj
Reviewed by: markj
Discussed with: brooks, kib
MFC after: 2 weeks
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D25272
By using DWC TRM terminology, normal descriptor format should be named
extended and alternate descriptor format should be named normal.
Should not been functional change.
MFC after: 4 weeks
This chip is used in the Rasperry Pi 4, and is supported by the if_genet
driver. Currently we use the ukphy mii driver, this patch switches over
to the brgphy mii driver instead. To support the rgmii-rxid phy mode,
which is now the default in the Linux dtb, we add support for clock
skewing.
These changes are taken from OpenBSD and NetBSD, except for the bailout
in brgphy_bcm54xx_clock_delay() in rgmii mode, which was found necessary
after testing.
Submitted by: Robert Crowston, crowston at protomail.com
Differential Revision: https://reviews.freebsd.org/D25251
o Parse the ACPI DSD (Device Specific Data) graph property and record
device connections.
o Split-out FDT support to a separate file.
o Get the corresponding (FDT/ACPI) Coresight platform data in
the device drivers.
Sponsored by: DARPA, AFRL
The trampoline code used for loading gzipped a.out kernels on arm was
removed in r350436. A portion of this code allowed for DDB to find the
symbol tables when booting without loader(8), and some of this was
untouched in the removal. Remove it now.
Differential Revision: https://reviews.freebsd.org/D24950
