OPAL runs in big endian, so we need to rfid into it to switch endian
atomically when branching to it, and we need to do the
RETURN_TO_NATIVE_ENDIAN dance when it returns to us.
Sponsored by: Tag1 Consulting, Inc.
Given that we have converted to ELFv2 for BE already, endianness is the only
difference between the two ARCHs.
As such, there is no need to differentiate LIBC_ARCH between the two.
Combining them like this lets us avoid needing to have two copies of several
bits for no good reason.
Sponsored by: Tag1 Consulting, Inc.
Unlike virtio, which in legacy mode is guest endian, the hypervisor vscsi
interface operates in big endian, so we must convert back and forth in several
places.
These changes are enough to attach a rootdisk.
Sponsored by: Tag1 Consulting, Inc.
The TCG implementation of mtmsrd in qemu blindly copies the entire register
to the MSR, instead of the specific bit positions listed in the ISA.
This means that qemu will prematurely switch endian out from under the
running code instead of waiting for the rfid, causing an immediate trap
as it attempts to interpret the next instruction in the wrong endianness.
To work around this, ensure PSL_LE is still set before doing the mtmsrd.
In the future, we may wish to just turn off translation and unconditionally
use rfid to switch to the ofmsr instead of quasi-switching to the ofmsr.
Add a new platform option so this can be disabled. (And so that we can
conditonalize additional QEMU-specific hacks in the platform code.)
Sponsored by: Tag1 Consulting, Inc.
Since we will need to be able to take traps relatively early in the process,
ensure that the hypervisor changes our ILE for us as soon as we are ready.
Sponsored by: Tag1 Consulting, Inc.
Since OFW always runs in big endian in practice, we need to convert several
bits back and forth.
This is necessary to communicate with SLOF on LE pseries.
Sponsored by: Tag1 Consulting, Inc.
This is the initial set up for PowerPC64LE.
The current plan is for this arch to remain experimental for FreeBSD 13.
This started as a weekend learning project for me and kinda snowballed from
there.
(More to follow momentarily.)
Reviewed by: imp (earlier version), emaste
Sponsored by: Tag1 Consulting, Inc.
Differential Revision: https://reviews.freebsd.org/D26399
I had overthought how to do the FICL_TRUE change. We do not need to
explicitly specify how big the 0 is before the cast to the correct size.
The same change was suggested by both imp@ and Gunther Nikl independently.
Tested on powerpc.
Reported by: imp, Gunther Nikl
Document the calls to send messages to userland via devctl.
devctl_notify will create a message for the specified system,
subsystem and type, optionally adding additional information.
Reviewed by: bcr
Differential Revision: https://reviews.freebsd.org/D26520
Belatedly document the quoting requirements for the devctl protocol. I
thought they'd been previously documented.
Also, while I'm here, make igor happy.
Reviewed by: bcr
Differential Revision: https://reviews.freebsd.org/D26520
This routine centralizes the knowledge needed for properly quoting
'value' in all key="value" items that appear in devctl messages.
Reviewed by: bcr
Differential Revision: https://reviews.freebsd.org/D26520
It is like O_BENEATH, but disables to walk out of the subtree rooted
in the starting directory. O_BENEATH does not care if path walks out
if it returned.
Requested by: Dan Gohman <dev@sunfishcode.online>
PR: 248335
Reviewed by: markj
Tested by: pho
Sponsored by: The FreeBSD Foundation
MFC after: 1 week
Differential revision: https://reviews.freebsd.org/D25886
Do not care if path walks out of the topping directory if it returns back.
Requested and reviewed by: markj
Tested by: pho
Sponsored by: The FreeBSD Foundation
MFC after: 1 week
Differential revision: https://reviews.freebsd.org/D25886
not unconditionally on any dotdot component.
Reviewed by: markj
Tested by: pho
Sponsored by: The FreeBSD Foundation
MFC after: 1 week
Differential revision: https://reviews.freebsd.org/D25886
the helper to calculate namei flags both for open(2) and creat(2).
Suggested and reviewed by: markj
Tested by: pho
Sponsored by: The FreeBSD Foundation
MFC after: 1 week
Differential revision: https://reviews.freebsd.org/D25886
the helper to convert AT_ flags for *at() syscalls to namei flags.
Reviewed by: markj
Tested by: pho
Sponsored by: The FreeBSD Foundation
MFC after: 1 week
Differential revision: https://reviews.freebsd.org/D25886
Stop abusing internal namei flag NI_LCF_STRICTRELATIVE as indicator of
cap-restricted lookup. Add designated returned flag NIRES_STRICTREL
to inform kern_openat() that lookup was restricted.
Reviewed by: markj
Tested by: pho
Sponsored by: The FreeBSD Foundation
MFC after: 1 week
Differential revision: https://reviews.freebsd.org/D25886
This makes open("/a/../a", O_BENEATH) with cwd == "/a" work.
Reviewed by: markj
Reported and tested by: pho
Sponsored by: The FreeBSD Foundation
MFC after: 1 week
Differential revision: https://reviews.freebsd.org/D25886
Explain why tracker is needed at all.
Reviewed by: markj
Tested by: pho
Sponsored by: The FreeBSD Foundation
MFC after: 1 week
Differential revision: https://reviews.freebsd.org/D25886
Otherwise a corrupted file entry containing invalid extended attribute
lengths or allocation descriptor lengths can trigger an overflow when
the file entry is loaded.
admbug: 965
PR: 248613
Reported by: C Turt <ecturt@gmail.com>
MFC after: 3 days
Sponsored by: The FreeBSD Foundation
In the spirit of the GENERIC config, we should include the drivers required to
run on most supported platforms.
Reviewed by: kp
Differential Revision: https://reviews.freebsd.org/D26501
This allows the PF interfaces to communicate with the VF interfaces over
the internal switch in the ASIC. Fix the GL limits for VM work requests
while here.
MFC after: 3 days
Sponsored by: Chelsio Communications
Extend the powerpc relative relocation handling from r240782 to a
handful of other architectures. This is needed to properly read
dependency information from kernel modules.
Reviewed by: jhb
Approved by: scottl (implicit)
MFC after: 1 week
Sponsored by: Ampere Computing, Inc.
Differential Revision: https://reviews.freebsd.org/D26365
On an Ampere Altra system, the physical memory is populated
sparsely within the physical address space, with only about 0.4%
of physical addresses backed by RAM in the range [0, last_pa].
This is causing the vm_reserv_array to be over-sized by a few
orders of magnitude, wasting roughly 5 GiB on a system with
256 GiB of RAM.
The sparse allocation of vm_reserv_array is controlled by defining
VM_PHYSSEG_SPARSE, with the dense allocation still remaining for
platforms with VM_PHYSSEG_DENSE.
Reviewed by: markj, alc, kib
Approved by: scottl (implicit)
MFC after: 1 week
Sponsored by: Ampere Computing, Inc.
Differential Revision: https://reviews.freebsd.org/D26130
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
An upcoming patch to use the bitset macros for tracking vm page
dump information could conceivably need more than INT_MAX bits.
Expand the bit type to long so that the extra range is available
on 64-bit platforms where it would most likely be needed.
CPUSET_COUNT and DOMAINSET_COUNT are also modified to remain of
type `int`.
Reviewed by: kib, markj
Approved by: scottl (implicit)
MFC after: 1 week
Sponsored by: Ampere Computing, Inc.
Differential Revision: https://reviews.freebsd.org/D26190
An upcoming change to include bitset(9) macros from vm_page.h
causes a macro name collision with vchi's custom bitset macros.
This change was performed mechanically by:
sed -i .orig s/BITSET/VCHI_BITSET/g $(grep -rl BITSET sys/contrib/vchiq)
Reviewed by: andrew
Approved by: scottl (implicit)
MFC after: 1 week
Sponsored by: Ampere Computing, Inc.
Differential Revision: https://reviews.freebsd.org/D26177
* Split rt_setmetrics into get_info_weight() and rt_set_expire_info(),
as these two can be applied at different entities and at different times.
* Start filling route weight in route change notifications
* Pass flowid to UDP/raw IP route lookups
* Rework nd6_subscription_cb() and sysctl_dumpentry() to prepare for the fact
that rtentry can contain multiple nexthops.
Differential Revision: https://reviews.freebsd.org/D26497
When matching a regex with ^, it would attempt to access
gototab[NSTATES][NCHARS+2], and therefore access the state for the \002
character instead. This change is required to run awk under CHERI (with
sub-object bounds) and when running with UBSan instrumentation.
This was committed upstream as cbf924342b
Found by: CHERI (with subobject bounds enabled)
Obtained from: CheriBSD
Reviewed By: imp
Differential Revision: https://reviews.freebsd.org/D26509
