This code was originally written under the assumption that the ISA
string would only contain single-letter extensions. The RISC-V
specification has extended its description of the format quite a bit,
allowing for much longer ISA strings containing multi-letter extension
names.
Newer versions of QEMU (7.1.0) will append to the riscv,isa property
indicating the presence of multi-letter standard extensions such as
Zfencei. This triggers a KASSERT about the expected length of the
string, preventing boot.
Increase the size of the isa array significantly, and teach the code
to parse (skip over) multi-letter extensions, and optional extension
version numbers. We currently ignore them completely, but this will
change in the future as we start supporting supervisor-level extensions.
MFC after: 2 weeks
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D36601
Add a minimal implementation of cpu_ptrace() for arm64. It is only used to
get/set VFP registers for 32bits binaries, as it is apparently what we use
there, instead of the MI PT_GETFPREGS/PT_SETFPREGS.
PR: 267361
MFC After: 1 week
When building a kernel without FDT these modules don't build. As they
depend on FDT and don't work with ACPI disable them.
Reviewed by: imp, kevans
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D37178
Add hostfs for the Linux environment. We can't use the userboot one
that's kinda similar because the Linux system calls we have in kboot are
not quite POSIX compliant (Linux takes care of providing the POSIX
interface in libc), so we have to cope with a number of quirks in that
area.
Sponsored by: Netflix
Differential Revision: https://reviews.freebsd.org/D36607
The fixups needed vary somewhat by architecture, so move the FDT fixup
to be per-arch. Rename the fdt_linux_fixup() routine to be
fdt_arch_fixup() and expect all architecutres to fix things up as
needed.
Sponsored by: Netflix
Differential Revision: https://reviews.freebsd.org/D36604
Linux reads MISC_FEATURES_ENABLES to manage the CPUID faulting feature
(undocumented in the Intel SDM, but documented in 323850-004 (Intel
Virtualization Technology FlexMigration Application Note). Since bhyve
doesn't emulate this feature, we always return 0. Neither does bhyve
support the MONITOR/MWAIT fault bit also in this MSR (which is
documented in the sdm), so always return 0.
Sponsored by: Netflix
Reviewed by: jhb
Differential Revision: https://reviews.freebsd.org/D36602
Something else may have set errno, breaking the post-getline() logic
that tries to detect the getline() error. This was initially noted in
a jail on a system that has HPET, in a jail that does not expose
/dev/hpet0 -- we see an earlier error in libc's vdso bits.
Fixes: 5c053aa3c5 ("split: switch to getline() [...]")
MAX_APIC_ID must be at least twice MAXCPU. Increase it to 0x800 so that
it is possible to set MAXCPU to 512 or 1024 in a custom kernel config
file.
Note that increasing this limit does not itself cause any allocations
to be larger; it just allows madt_parse_cpu() to process higher APIC
IDs.
APIC IDs may be sparse and so we can waste memory. This is independent
of this change, but becomes more of an issue as the maximum APIC ID
grows. This should be addressed with future work.
Reviewed by: royger
MFC after: 1 week
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D37067
This is only ever used by a FDT specific attachment and calls into
FDT specific functions. Only build it when FDT is in the kernel config.
Sponsored by: The FreeBSD Foundation
- We depend on header polution to include sys/malloc.h. Include it
directly.
- Only define FDT-specific fuctions when building a FDT kernel.
Sponsored by: Innovate UK
The cpu_dcache_wb_range function is an expensive function that is
unneeded in ddb. It is used when the cache needs to be written to RAM,
e.g. when working with a non-cache coherent device.
Remove it as cpu_icache_sync_range already has the needed d-cache
handling to ensure any changed memory is visible to the i-cache.
Reviewed by: imp
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D37037
Mostly to document basic harware present on the platform; knowing that
Graviton exposes an ns8250 uart alone is quite helpful.
Reviewed by: andrew, imp, manu
Seems accurate: cperciva
Sponsored by: NetApp, Inc.
Sponsored by: Klara, Inc.
Differential Revision: https://reviews.freebsd.org/D36776
For some of these Clang produced a warning that "a function declaration
without a prototype is deprecated in all versions of C". In other cases
the function defintion used () which did not match the header
declaration, which used (void).
Sponsored by: The FreeBSD Foundation
Also remove the out-parameter of pci_xhci_find_stream(), since it's
unused by all callers.
MFC after: 1 week
Reviewed by: jhb
Differential Revision: https://reviews.freebsd.org/D37118
clang warned that "client_ver" can be left uninitialized. This change
causes the new connection to be dropped if a version string is not
presented.
MFC after: 1 week
Reviewed by: jhb
Differential Revision: https://reviews.freebsd.org/D37117
This is the last part for ARM64 Hyper-V enablement. This includes
commone files and make file changes to enable the ARM64 FreeBSD
guest on Hyper-V. With this patch, it should be able to build
the ARM64 image and install it on Hyper-V.
Reviewed by: emaste, andrew, whu
Tested by: Souradeep Chakrabarti <schakrabarti@microsoft.com>
Sponsored by: Microsoft
Differential Revision: https://reviews.freebsd.org/D36744
psci_attach is way too late to provide the intended semantics for
psci_present. psci calls can be made immediately after psci_init(),
called way earlier at SI_SUB_CPU + SI_ORDER_FIRST, and we need it to
be valid as early as we can possibly call a psci function.
This fixes booting RPi3+4 with the in-review spintable patch;
rpi3-psci-monitor patches the FDT to add a PSCI node, but it doesn't
patch each cpus' enable-method. Because of this, we would stall the
boot while enabling CPU 1 as we saw a valid looking enable-method and
"no" functional PSCI and attempted to use the spintable rather than
simply not starting secondary APs.
Fixes: 2218070b2c ("psci: finish psci_present implementation")
Reported by: karels
Refactor the symlink and mountpoint traversal logic to avoid
repeatedly checking the vnode type; a symlink cannot be a mountpoint
and vice versa. Avoid repeatedly checking cn_flags for NOCROSSMOUNT
and simplify the check which determines whether the vnode is a
mountpoint.
Suggested by: mjg
Reviewed by: kib
Tested by: pho
Differential Revision: https://reviews.freebsd.org/D35054
These are of limited use since the crossmp vnode locking ops have not
actually used a lock since commit
a2d3554542. We in fact require that
these operations are always issued with LK_SHARED. Additionally,
these directives can produce a false positive in certain VV_CROSSLOCK
cases which require upgrading of the covered vnode lock from shared
to exclusive.
While here, replace the runtime check of LK_SHARED with a KASSERT and
expand the check to include LK_NOWAIT, which all callers pass.
Reviewed by: kib
Tested by: pho
Differential Revision: https://reviews.freebsd.org/D35054
When a lookup operation crosses into a new mountpoint, the mountpoint
must first be busied before the root vnode can be locked. When a
filesystem is unmounted, the vnode covered by the mountpoint must
first be locked, and then the busy count for the mountpoint drained.
Ordinarily, these two operations work fine if executed concurrently,
but with a stacked filesystem the root vnode may in fact use the
same lock as the covered vnode. By design, this will always be
the case for unionfs (with either the upper or lower root vnode
depending on mount options), and can also be the case for nullfs
if the target and mount point are the same (which admittedly is
very unlikely in practice).
In this case, we have LOR. The lookup path holds the mountpoint
busy while waiting on what is effectively the covered vnode lock,
while a concurrent unmount holds the covered vnode lock and waits
for the mountpoint's busy count to drain.
Attempt to resolve this LOR by allowing the stacked filesystem
to specify a new flag, VV_CROSSLOCK, on a covered vnode as necessary.
Upon observing this flag, the vfs_lookup() will leave the covered
vnode lock held while crossing into the mountpoint. Employ this flag
for unionfs with the caveat that it can't be used for '-o below' mounts
until other unionfs locking issues are resolved.
Reported by: pho
Tested by: pho
Reviewed by: kib
Differential Revision: https://reviews.freebsd.org/D35054
Older binaries that do not request IPI exits to userspace do not
start user threads for other vCPUs until a STARTUP IPI triggers a
VM_EXITCODE_SPINUP_AP exit to userland. This means that those vcpus
are not yet active (in terms of vm_active_cpus) when the INIT and
STARTUP IPIs are delivered to the vCPUs.
The changes in commit 0bda8d3e9f changed the INIT and STARTUP IPIs
to reuse the existing vlapic_calcdest() function. This function
silently ignores IPIs sent to inactive vCPUs. As a result, when using
an old bhyve binary, the INIT and STARTUP IPIs sent to wakeup APs were
ignored.
To fix, restructure the compat code for the INIT and STARTUP IPIs to
ignore the results of vlapic_calcdest() and manually parse the APIC ID
and resulting vcpuid. As part of this, make the compat code always
conditonal on the ipi_exit capability being disabled.
Reviewed by: c.koehne_beckhoff.com, markj
Differential Revision: https://reviews.freebsd.org/D37093
