Create segment handling code up to the top level. Move it all into
seg.c, and make necessary adjustments for it being in a new file,
including inventing print_avail() and first_avail() to print the array
and find the first large enough memory hole. aarch64 will use this,
and I'll refactor the other platforms to use it as I make them work.
Sponsored by: Netflix
Discussed with: kevans
Differential Revision: https://reviews.freebsd.org/D38308
enumerate_memory_arch is called once early in kboot's startup to allow
us to discover the memory layout, reserved areas, etc of the system
memory. Add the MI interface part of this.
Sponsored by: Netflix
Reviewed by: tsoome, kevans
Differential Revision: https://reviews.freebsd.org/D38247
Guess where to boot from when bootdev= isn't on the command line or
other config. Search all the disks and partitions for one that looks
like it could be a boot partition (same as we do when probing
zpools). Return the first one we find.
Sponsored by: Netflix
Reviewed by: tsoome
Differential Revision: https://reviews.freebsd.org/D38319
Use serial port setup done by system firmware.
ARM64 Hyper-V does hung if we attempt to override the defaults,
therefore we should default to use settings from firmware.
Tested by: schakrabarti@microsoft.com
PR: 266248
MFC after: 1 week
Turns out that the loadaddr interface is not sufficiently expressive to
do the loading we need to do. Instead, we'll emulate some of its
features with inline math in copyin/copyout.
Sponsored by: Netflix
Reviewed by: kevans
Differential Revision: https://reviews.freebsd.org/D38260
When converting from a Linux error to a FreeBSD errno, assert that the
value passed in is negative, as is Linux's custom.
Suggested by: brooks
Sponsored by: Netflix
Reviewed by: tsoome, brooks
Differential Revision: https://reviews.freebsd.org/D38357
To properly size segments, we have to know how much memory we have in
the system, as well as how much this process can allocate. Due to our
inability to overcommit, we need to know how much memory is
available. commit_limit is the grand total allowed. committed_as is the
current memory used. mem_avail is what Linux tells us is available. Find
these from /proc/meminfo. We'll use them later to allocate the biggest
possible segment sizes, but for now print the raw numbers.
Sponsored by: Netflix
Reviewed by: kevans (earlier version)
Differential Revision: https://reviews.freebsd.org/D38267
Translate the Linux error return from read to a FreeBSD errno. We use a
simplified translation: 1-34 are the same between the systems, so any of
those will be returned directly. All other errno map to EINVAL. This
will suffice for some code that reads /dev/mem in producing the right
diagnostic.
A fully generalized version is much harder. Linux has a number of errno
that don't translate well and has architecture dependent
encodings. Avoid this mess with a simple macro for now. Add comment
explaining why we use the simple method we do.
Sponsored by: Netflix
Reviewed by: kevans, andrew
Differential Revision: https://reviews.freebsd.org/D38265
The device name was totally wrong. It should be "/dev/mumble:" not just
"mumble".
Sponsored by: Netflix
Reviewed by: tsoome
Differential Revision: https://reviews.freebsd.org/D38318
We only need 64MB to read off ZFS pools. Since Linux doesn't do
ovecommit by default, the extra 64MB is 64MB less we can allocate for
things like RAM disks.
Sponsored by: Netflix
Reviewed by: kevans, andrew
Differential Revision: https://reviews.freebsd.org/D38268
We only use symidx on x86, so only compute it on x86 to fix a set but
not used warning on aarch64.
Sponsored by: Netflix
Reviewed by: kevans
Differential Revision: https://reviews.freebsd.org/D38246
The default function are enough for md so use them instead of the
disks ones that doesn't work for it anymore.
Reviewed by: imp
Sponsored by: Beckhoff Automation GmbH & Co. KG
MFC after: now
Differential Revision: https://reviews.freebsd.org/D38218
Upstream luaconf.h is contrib/lua/src/luaconf.h.dist, while userland lua
and loader lua have copies in lib/liblua/luaconf.h and
stand/liblua/luaconf.h.
Adjust whitespace, VCS tags, etc. to match upstream's version, for ease
of comparison.
Reviewed By: imp
Sponsored By: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D38206
When needed, -fPIC is added in defs.mk. While not in main, mips on
stable/13 can't tolerate it. Remove it here.
MFC After: now (it's a build issue)
Sponsored by: Netflix
We pass in the address of a variable to store this value always in the
only place that calls this function, so there is no need to test for NULL.
Sponsored by: Netflix
Notied by: tsoome in D38041
Use the standard set_currdev instead of the (now very old) copy of
setting currdev and loaddev directly. We do this only when we don't go
find the ZFS pool to boot from.
Sponsored by: Netflix
Reviewed by: kevans
Differential Revision: https://reviews.freebsd.org/D38012
When hostdisk_override is set, all the /dev devices are hidden, and only
the files in that directory are used. This will allow filesystem testing
on FreeBSD without root, for example. Adjust the parse routine to not
require devices start with /dev (plus fix a leak for an error
condition). Add a match routine to allow the device name to be something
like "/home/user/testing/zfsfoo:" instead of strictly in /dev. Note:
since we need to look at all the devices in the system to probe for ZFS
zpools, you can't generally use a full path to get a 'virtual disk' at
this time.
Sponsored by: Netflix
Reviewed by: kevans
Differential Revision: https://reviews.freebsd.org/D38011
Fetch bootdev from the environment variable (so it should be set on the
command line). Default to 'zfs:' which will in the future look for the
first zpool that we can boot from. Prior versions of kboot would set
this from the second argument on the command line.
Fetch hostfs_root from the environment (defaulting to '/'). Prior
versions of kboot would set this from the first arg on the command line.
Sponsored by: Netflix
Reviewed by: kevans
Differential Revision: https://reviews.freebsd.org/D38010
Now that all the pieces are in place, allow kboot to be built with ZFS
support.
Sponsored by: Netflix
Reviewed by: kevans
Differential Revision: https://reviews.freebsd.org/D38009
Add the zfs device and filesystem to config and write the hook we need
to probe zfs since there's not a generic mechanism in place to do that
when ZFS is configured.
Sponsored by: Netflix
Reviewed by: kevans
Differential Revision: https://reviews.freebsd.org/D38008
Add helper function to walk through the disk drives we've found to look
for zpools. main.c will still need to call this because the loader
hasn't implemented a good way to 'taste' drives for zpools and/or GELI
partitions (mostly because there's no generic list of candidate
devices).
Sponsored by: Netflix
Reviewed by: kevans
Differential Revision: https://reviews.freebsd.org/D38007
Keep a list of disks and partitions that we have. Keep track of the
sizes of the media and sector and use that to implement DIOCGMEDIASIZE
and DIOCGSECTORSIZE. Proivde a way to lookup disks by name.
Sponsored by: Netflix
Reviewed by: kevans (prior version)
Differential Revision: https://reviews.freebsd.org/D38013
Now that we return an allocated zfs_devdesc, we have to free it. These
frees were missing from the error cases. In addition, simplify the code
a bit for the out of memory case.
Sponsored by: Netflix
Reviewed by: kevans
Differential Revision: https://reviews.freebsd.org/D38006
Most parsedev routines assume that idev is non-null and can always be
set. Since we break from this pattern in uboot, explain why in a
comment. devparse was invented to put a lot of common code in one place
and to simplify the archsw.arch_getdev code and any dv_parsedev code
called. However, uboot couldn't use devparse at the time because its
device naming scheme slightly different parsing. So, we still use
uboot_parsedev directly from uboot_getdev where dev could be NULL. Add a
comment to this effect.
The match functionality added for ofw likely could be used to clean up
the multiple kludges that are here for uboot's device naming differences
with the normal boot loader. This work will wait for the future.
Sponsored by: Netflix
Reviewed by: kevans
Differential Revision: https://reviews.freebsd.org/D38042
dev can't be NULL here. ofw_common_parsedev is always called via
devparse (indirectly through dv_parsedev() calls there which call it
with the args unchanged). In the past, ofw_getdev could call us with
NULL pointer for the parse-only case, but that's now all handled inside
of devparse for simplicity.
Sponsored by: Netflix
Reviewed by: kevans
Differential Revision: https://reviews.freebsd.org/D38041
zfs lives in libsa. However, it depends on nvstore (and other things)
that are in common. Fix part of this layering violation by splitting
nvstore into a libsa piece (which is the base implementation) and
keeping a much smaller common piece (to implement the nvstore
command). This just leaves zfs' knowledge of device names that's
specific to common and its calling platform specific init code to
resolve. Add a nvstore.h file for these two parts to communicate private
things and move the public nvstore api from bootstrap.h to stand.h.
Sponsored by: Netflix
Reviewed by: tsoome, kevans
Differential Revision: https://reviews.freebsd.org/D38043
Pull together the nearly identical copies of set_currdev in i386,
userboot and efi. Other boot loaders have variances that might be fine
to use the common routine, or not. Since they are harder to test for me,
and ofw and uboot do handle these setting differently, leave them be for
now.
Sponsored by: Netflix
Reviewed by: kevans
Differential Revision: https://reviews.freebsd.org/D38005
Since dev_cleanup() walks through all the devsw devices with dv_cleanup
rotuines, move it into libsa rather than having it in
'common'. Logically, it operates only on things that are in libsa, and
would never be different for different loaders: either people would call
it as is, or they'd do the loop themselves with 'special' things inline
between calls to cleanup (not that I think that will ever be needed
though).
Sponsored by: Netflix
Reviewed by: kevans
Differential Revision: https://reviews.freebsd.org/D38004
Replace 4 identical copies of *_setcurrdev with gen_setcurrdev to avoid
having to create a 5th copy. uboot_setcurrdev is actually different and
needs to remain separate (even though it's quite similar).
Sponsored by: Netflix
Reviewed by: fuz@fuz.su, kevans
Differential Revision: https://reviews.freebsd.org/D38003
sanity_check_currdev returns true if it found a kernel or a sane loader
config file. A better name for this would be 'bootable' rather than 'rv'
which connotes in other places an errno value or similar.
Sponsored by: Netflix
Pass in 'true' if you'd like to search this device's partitions or
'false' if you should just search the device. EFI and (in the future)
kboot have discrete partitions that aren't accessed via the full disk
device. Weird things happen if you try to search in these cases.
Sponsored by: Netflix
ZFS uses a lot of memory. The old minimal allocations won't work when
ZFS support is added. Most environments this will be used (or will
liekly be used) have >> 256MB, 128MB should be safe everywhere and allow
examination of a fair number of ZFS pools to boot from.
Sponsored by: Netflix
Add the familiar macros for file types for stat's st_mode
member. Prepend HOST_ to the start of these. Make sure all the values
match the linux nolibc and uapi headers. These values are the same as
native values since they appear to be required by POSIX. Define anyway
to allow the reader of the code to know that they are in the 'host (eg
Linux)' namespace rather than the 'loader' namespace.
Sponsored by: Netflix
Differential Revision: https://reviews.freebsd.org/D37967
Linux pre-boot environments will often have a number of psuedo disks
that are small, all smaller than a few MB. 16MB is a good cutoff since
it's big enough to filter these devices, yet small enough to allow a
super-minimal partition through (the smallest I've been able to make
that's useful lately is around 20MB).
Sponsored by: Netflix
Allow stand.h to be included in C++ programs. This is little more than
using our stylized __BEGIN_DECL / __END_DECL around the entire
file. There's no run-time support for C++, so the C++ that can be used
is quite limited. It is enough for libunwind, though.
Sponsored by: Netflix
Reviewed by: jrtc27, kevans
Differential Revision: https://reviews.freebsd.org/D37946
libunwind files need inttype.h. It's safe so add it to the safe list.
Sponsored by: Netflix
Reviewed by: jrtc27, kevans
Differential Revision: https://reviews.freebsd.org/D37947
The Windows Dev Kit 2023 (Volterra) has an UEFI implementation that maps
EfiLoaderData pages as non-executable. Map the kernel as EfiLoaderCode
to ensure that it can be executed.
With this change and another in review, FreeBSD boots to the mountroot
prompt if hw.pac.enable = 0 is set in loader.conf(5).
Reviewed by: andrew, imp, tsoome
Sponsored by: Berliner Linux User Group e.V.
Sponsored by: spline / FU-Berlin
Differential Revision: https://reviews.freebsd.org/D37931
It typically had two args with an optional third from the userland
declaration in sys/ioccom.h. However, the funciton definition used a
non-optional char * argument. This mismatch is UB behavior (but worked
due to the calling convetions of all our machines).
Instead, add a declaration for ioctl to stand.h, make the third arg
'void *' which is a better match to the ... declaration before. This
prevents the convert int * -> char * errors as well. Make the ioctl
user-space declaration truly user-space specific (omit it in the
stand-alone build).
No functional change intended.
Sponsored by: Netflix
Reviewed by: emaste
Differential Revision: https://reviews.freebsd.org/D37680
`int foo();` means 'a function that takes any number of arguments.`
not `a function that takes no arguemnts`, that's spelled `int foo(void);`
Adopt the latter.
Sponsored by: Netflix
Linux has /sys/firmware/fdt and /proc/device-tree to publish the dtb for
the system. The former has it all in one file, while the latter breaks
it out. Prefer the former since it's the more modern interface, but
retain both since I don't have a PS3 to test to see if its kernel is new
enough for /sys/firmware or not.
In addition, do the proper fixup.
Sponsored by: Netflix
Do the standard command line parsing... With a small twist to deal with
the quirks of booting via linuxboot to the initrd from the command line
in shell.efi and other observed oddities.
Sponsored by: Netflix
main() of the boot loader is expected to call devinit() early. We do
this at the same time we do it in the EFI loader (except we don't have a
buffer cache here, we don't need to initialize time and we don't have
special efi partition handles to enumerate). This is just after we probe
for the console.
Sponsored by: Netflix
Copy EFI's bootinfo.c and make minor adjustments for kboot's needs. Do
not connect this to the build just yet until other pieces are in place.
Sponsored by: Netflix
bootinfo.c is about to be shared with kboot since they create
substantially similar environments / metadata tagging / etc. Tag this
with #ifdef EFI for the moment until the proper abstracting out can
happen.
Sponsored by: Netflix
