On some DesignWare PCIe controllers accessing config registers of slots
whose link is down triggers a SError. Because of that we need to check the
link status before any acceses config space.
Due to a typo link was always reported up.
This fixes a SError that occured during boot on LS1028A-RDB.
Obtained from: Semihalf
Reviewed by: wma
Differential revision: https://reviews.freebsd.org/D31509
Move the common kernel function signatures from machine/reg.h to a new
sys/reg.h. This is in preperation for adding PT_GETREGSET to ptrace(2).
Reviewed by: imp, markj
Sponsored by: DARPA, AFRL (original work)
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D19830
Unused since ba96f37758 ("Use __builtin for various mem* and b* (e.g. bzero)
routines.")
Reviewed by: andrew
Sponsored by: Rubicon Communications, LLC ("Netgate")
Differential Revision: https://reviews.freebsd.org/D31651
These are needed to signal to the kernel when a Reliability,
Availability, and Serviceability (RAS) exception has triggered.
Reviewed by: mhorne
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D31477
In preparation for clone3 system call add struct clone_args and use it in
clone implementation.
Move all of clone related bits to the newly created linux_fork.h header.
Differential revision: https://reviews.freebsd.org/D31474
MFC after: 2 weeks
We use the midr_el1 register to decode which CPU type we are booting
from. Read it on the secondary CPUs before waiting for the boot CPU
to release us as it will need to use it before the release.
Sponsored by: The FreeBSD Foundation
This was added early in the development of the arm64 port when
cpu_switch was just a stub. It should have been removed when cpu_switch
was implemented, however this didn't seem to be the case, and the '%p'
was added.
As this hasn't been needed in 7 years we can remove it.
Sponsored by: The FreeBSD Foundation
When exiting to userspace the code is similar to the restore_registers
macro in exception.S. Rework it to remove most of the non-style
differences.
Sponsored by: The FreeBSD Foundation
These ones were unambiguous cases where the Foundation was the only
listed copyright holder (in the associated license block).
Sponsored by: The FreeBSD Foundation
Add the ability to map named components from IORT to their
SMMU or ITS node in order to setup interrupts.
It is now possible to find a node by its name (substring) and
resource ID similar to PCI nodes.
This is needed by work on a driver for NXP's Second Generation
Data Path Acceleration Architecture (DPAA2).
Reviewed by: andrew
MFC after: 2 weeks
Differential Revision:: https://reviews.freebsd.org/D31267
There is no need to store a pointer to the CPU implementer and part
strings. Switch to load them directly into the sbuf used to print them
on boot.
While here print the machine ID register when we fail to determine the
implementer or part we are booting on.
Reviewed by: markj, kib
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D31346
The HWCAPS values are based on the ID registers. Move setting these
to the existing ID register parsing code.
Previously we would need to handle all possible ID field values where
a HWCAP is set, however as most ID fields follow a scheme where when
the field increments it will only add new features meaning we only
need to check if the field is greater than when the HWCAP feature
was added.
While here stop setting HWCAP value that need kernel support, but this
support is missing.
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D31201
which is the place to put MD asserts about allocated pages.
On amd64, verify that allocated page does not belong to the kernel
(text, data) or early allocated pages.
Reviewed by: markj
Sponsored by: The FreeBSD Foundation
MFC after: 1 week
Differential revision: https://reviews.freebsd.org/D31121
KASAN and KCSAN implement interceptors for various primitive operations
that are not instrumented by the compiler. KMSAN requires them as well.
Rather than adding new cases for each sanitizer which requires
interceptors, implement the following protocol:
- When interceptor definitions are required, define
SAN_NEEDS_INTERCEPTORS and SANITIZER_INTERCEPTOR_PREFIX.
- In headers that declare functions which need to be intercepted by a
sanitizer runtime, use SANITIZER_INTERCEPTOR_PREFIX to provide
declarations.
- When SAN_RUNTIME is defined, do not redefine the names of intercepted
functions. This is typically the case in files which implement
sanitizer runtimes but is also needed in, for example, files which
define ifunc selectors for intercepted operations.
MFC after: 2 weeks
Sponsored by: The FreeBSD Foundation
gcc failed as it didn't inlined the builtins and generates calls to
the libgcc, ld can't find libgcc as cross-toolchain libgcc is not installed.
To avoid this add internal vDSO ffs functions without optimized builtins.
Reported by: jhb
MFC after: 2 weeks
Use these to simplify the definition of the user_regs array.
Reviewed by: imp, markj
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D31333
The Arm Architecture Envelope Model is a simulator that models the
architecture rather than any specific implementation. Add its part ID
macro and add it to the list of Arm CPUs we can decode.
Sponsored by: The FreeBSD Foundation
Note that this still uses FreeBSD-style sigframe;
this will be addressed later.
Reviewed By: dchagin
Sponsored By: EPSRC
Differential Revision: https://reviews.freebsd.org/D31258
Due to a mis-merge, the changes committed to libpmc never called
pmu_parse_event(), or set pm->pm_ev. However, this field shouldn't be
used to carry the actual pmc event code anyway, as it is expected to
contain the index into the pmu event array (otherwise, it breaks event
name lookup in pmclog_get_event()). Add a new MD field,
pm_md.pm_md_config, to pass the raw event code to arm64_allocate_pmc().
Additionally, the change made to pmc_md_op_pmcallocate was incorrect, as
this is a union, not a struct. Restore the proper padding size.
Reviewed by: luporl, ray, andrew
Fixes: 28dd6730a5 ("libpmc: enable pmu_utils on arm64")
Fixes: 8cc3815f02 ("hwpmc_arm64: accept raw event codes...")
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D31221
In particular, print them before we release APs. Otherwise they tend to
get mixed with other kernel messages.
Reviewed by: andrew, manu
MFC after: 1 week
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D31242
On Linux, this syscall doesn't take any arguments; instead
it assumes the context was put on the stack.
Reviewed By: dchagin
Sponsored By: EPSRC
Differential Revision: https://reviews.freebsd.org/D31251
This will be useful in an update for finding which HWCAPS to set.
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D31200
On arm64 we should use bit 55 of the address to decide if aan address
is a user or kernel address. Add a new macro with this check and a
second to ensure the address is in teh canonical form, i.e.
the top bits are all zero or all one.
This will help with supporting future cpu features, including Top
Byte Ignore, Pointer Authentication, and Memory Tagging.
Reviewed by: kib
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D31179
The vDSO initialisation order should be as follows:
- native abi init via exec_sysvec_init();
- vDSO symbols queued to the linux_vdso_syms list;
- linux_vdso_install();
- linux_exec_sysvec_init();
As the exec_sysvec_init() called with SI_ORDER_ANY (last) at SI_SUB_EXEC
order, move linux_vdso_install() and linux_exec_sysvec_init() to the
SI_SUB_EXEC+1 order.
Reviewed by: trasz
Differential Revision: https://reviews.freebsd.org/D30902
MFC after 2 weeks
The vDSO (virtual dynamic shared object) is a small shared library that the
kernel maps R/O into the address space of all Linux processes on image
activation. The vDSO is a fully formed ELF image, shared by all processes
with the same ABI, has no process private data.
The primary purpose of the vDSO:
- non-executable stack, signal trampolines not copied to the stack;
- signal trampolines unwind, mandatory for the NPTL;
- to avoid contex-switch overhead frequently used system calls can be
implemented in the vDSO: for now gettimeofday, clock_gettime.
The first two have been implemented, so add the implementation of system
calls.
System calls implemenation based on a native timekeeping code with some
limitations:
- ifunc can't be used, as vDSO r/o mapped to the process VA and rtld
can't relocate symbols;
- reading HPET memory is not implemented for now (TODO).
In case on any error vDSO system calls fallback to the kernel system
calls. For unimplemented vDSO system calls added prototypes which call
corresponding kernel system call.
Tested by: trasz (arm64)
Differential revision: https://reviews.freebsd.org/D30900
MFC after: 2 weeks
Temporary add stubs to the Linux emulation layer which calls the existing hook.
Reviewed by: kib
Differential Revision: https://reviews.freebsd.org/D30911
MFC after: 2 weeks
In preparation for vDSO code revision get rid of incomplete vDSO methods
from locore, but leave .note.Linux section commented out.
.note.Linux section is used by glibc rtld to get the kernel version, that
saves one system call call. I'll try to implement it later, if figure out
how to use it with jails.
MFC after: 2 weeks
The underlying types for both are the same so arguably this doesn't
really matter, but using the wrong type is still confusing and
technically incorrect.
