Address two issues with current help file logic:
The existing condition prevents the common help file from being
installed when there are no additional help files defined. This results
in no loader.help on EFI platforms, for example.
Second, due to the fact that we build and install multiple loader types,
each successive install will clobber the previous loader.help. The
result is that we could lose type-specific commands, or possibly list
them in loaders that do not have such commands.
Instead, give each loader type a uniquely named help file. The EFI
loader will look for /boot/loader.help.efi, userboot will look for
/boot/loader.help.userboot, etc. The interpreter variant has no effect
on which help file is loaded.
This leaves the old /boot/loader.help unused.
Some credit for the final approach goes to Mathieu <sigsys@gmail.com>
for their version of the fix in https://reviews.freebsd.org/D22951.
PR: 267134
Reported by: Daniel O'Connor <darius@dons.net.au>
Reviewed by: imp
MFC after: 1 week
Differential Revision: https://reviews.freebsd.org/D28591
We no longer use in_pcbbind() since 2510235150. The comment about
truncating old TIME-WAIT describes a code that had been removed back
in 2004 in c94c54e4df.
Do the cast from sockaddr to either IPv4 or IPv6 sockaddr in the
protocol's pr_connect method and from there on go down the call
stack with family specific argument.
Reviewed by: markj
Differential revision: https://reviews.freebsd.org/D38356
This removes recursive epoch entry in the syncache case. Fixes
unprotected access to V_in6_ifaddrhead in in6_pcbladdr(), as
well as access to prison IP address lists. It also matches what
IPv4 in_pcbconnect() does.
Reviewed by: markj
Differential revision: https://reviews.freebsd.org/D38355
It was a safe belt just in case if the new port allocation
behaviour introduced in 2510235150 would cause a problem.
Reviewed by: markj, rscheff, tuexen
Differential revision: https://reviews.freebsd.org/D38353
All callers of in_pcbdisconnect() clear the local address, so let's just
do that in the function itself.
Note that the inp's local address is not a parameter to the inp hash
functions. No functional change intended.
Reviewed by: glebius
MFC after: 2 weeks
Sponsored by: Klara, Inc.
Sponsored by: Modirum MDPay
Differential Revision: https://reviews.freebsd.org/D38362
It makes more sense to check lookupflags in the function which actually
uses SMR. No functional change intended.
Reviewed by: glebius
MFC after: 1 week
Sponsored by: Klara, Inc.
Sponsored by: Modirum MDPay
Differential Revision: https://reviews.freebsd.org/D38359
While here, move notes about FreeBSD-specific functionality to the
COMPATIBILITY section, and document the ECAPMODE error for shm_open().
Reviewed by: pauamma, kib
MFC after: 2 weeks
Sponsored by: Klara, Inc.
Sponsored by: Juniper Networks, Inc.
Differential Revision: https://reviews.freebsd.org/D38282
When the cycle counter is "stable", i.e., synchronized across vCPUs by
the hypervisor, userspace can use a serialized rdtsc instead of relying
on rdtscp, just like the kernel timecounter does. This can be useful
for performance in guests where the hypervisor hides rdtscp for some
reason.
To avoid breaking compatibility with older userspace which expects
rdtscp to be usable when pvclock exports timekeeping info, hide this
feature behind a sysctl.
Reviewed by: kib
Tested by: Shrikanth R Kamath <kshrikanth@juniper.net>
MFC after: 2 weeks
Sponsored by: Klara, Inc.
Sponsored by: Juniper Networks, Inc.
Differential Revision: https://reviews.freebsd.org/D38342
In preparation for a follow-up revision wherein kvmclock may export
timekeeping info to userspace even in the absence of AMDID_RDTSCP, fall
back to using rdtsc when rdtscp isn't available. This mimics
pvclock_read_time_info() in the kernel.
Reviewed by: kib
Tested by: Shrikanth R Kamath <kshrikanth@juniper.net>
MFC after: 2 weeks
Sponsored by: Klara, Inc.
Sponsored by: Juniper Networks, Inc.
Differential Revision: https://reviews.freebsd.org/D38341
Ensure that we populate /etc/fstab for all the ufs images. Tweak sizes
while I'm at it.
Note: This file could use a good refactoring... or maybe a rewrite in
python or lua.
Sponsored by: Netflix
Reviewed by: tsoome
Differential Revision: https://reviews.freebsd.org/D38317
Keep track of how much is used in the segment as we allocate it to the
application. Set memsz to 0 first, and increment it as used. Adjust the
bufsz before we call kexec so the kernel copies the right amount (it's
an error for bufsz to be bigger than memsz, so we set them == when we
retrieve the segment). Make sure we round to the page size, otherwise
kexec_load gets cranky.
Sponsored by: Netflix
Reviewed by: tsoome
Differential Revision: https://reviews.freebsd.org/D38315
Allocate a huge segment for the first kexec_load segments. We limit the
lessor of:
allocation to the size of the remaining memory segment
45% of available memory
95% of the memory we can allocate
This allows us to have really large RAM disks. We likely need to limit
this to the amount we actually used, though, since this can be a lot of
memory.
We have to do this complicated calculation for a few reasons: First, we
need 2 copies of the loaded kernel in the memory: The kernel can copy
everything to a temporary buffer. Next, malloc (via mmap) is limited to
a certain amount due to over commit, so we have to not allocate all we
can (only most of what we can).
Sponsored by: Netflix
Reviewed by: tsoome
Differential Revision: https://reviews.freebsd.org/D38314
kboot_get_phys_load_segment is defined in kboot.h, so remove them from
the .c files.
Sponsored by: Netflix
Reviewed by: tsoome
Differential Revision: https://reviews.freebsd.org/D38310
Try to open /dev/mem to read in the UEFI memory map. If we can't, then
we'll read it in the trampoline.
Retain reading in /proc/iomem to find reserved areas in Linux. We need
to know them for good places to put the kernel. These are not reflected
in the UEFI memory map. However, we should not adjust the UEFI memory
map since these reserved areas of the Linux kernel are free to be used
once we enter the kexec trampoline...
Sponsored by: Netflix
Reviewed by: tsoome, kevans, andrew
Differential Revision: https://reviews.freebsd.org/D38264
There's no need for an arch pointer to get segments. We can call the
routine directly since we don't need this code to be called from
different context where a pointer is needed.
Sponsored by: Netflix
Reviewed by: kevans, andrew
Differential Revision: https://reviews.freebsd.org/D38266
A number of bug fixes to loading kernels and modules on aarch64 and amd64.
Fix offset calcuations.
Add a number of debugs, commented out for now (will GC them in the future)
With this, and the MD aarch64 commands, we can linux boot in qemu and on
real hardware.
Sponsored by: Netflix
Reviewed by: kevans
Differential Revision: https://reviews.freebsd.org/D38261
Copy more of the necessary state for FreeBSD to boot:
o Copy EFI memory tables
o Create custom page tables needed for the kernel to find itself
o Simplify the passing of args to the trampoline by putting them
on the stack rather than in dedicated memory.
This is only partially successful... we get only part way through the
amd64 startup code before dying. However, it's much further than before
the changes.
Sponsored by: Netflix
Reviewed by: tsoome, kevans
Differential Revision: https://reviews.freebsd.org/D38259
Update exec.c (copyied from efi/loader/arch/arm64/exec.c) to allow
execution of aarch64 kernels. This includes a new trampoline code that
handles copying the UEFI memory map, if available from the Linux FDT
provided PA. This is a complete implementation now, able to boot from
the LinuxBoot environment on an aarch64 server that only offers
LinuxBoot (though a workaround for the gicv3 inability to re-init is not
yet in FreeBSD). Many 'fit and finish' issues will be addressed in
subsequent commits.
Sponsored by: Netflix
Reviewed by: tsoome, kevans, andrew
Differential Revision: https://reviews.freebsd.org/D38258
Connect efi's bootinfo.c to the kboot build, and adjust to use
the kboot specific routines.
The getrootmount() call is independent of EFI. Remove ifdefs so it's
called for kboot too.
The differences between the kboot and efi bootinfo.c files are now tiny.
This could use some more refactoring, but this is a working checkpoint.
Sponsored by: Netflix
Reviewed by: tsoome
Differential Revision: https://reviews.freebsd.org/D38350
Since aarch64 is different, it needs a different smap. We first see if
we have the PA of the table from the FDT info. If so, we copy that and
quit. Otherwise, we do the best we can in translating the /proc/iomap
into EFI Memory Table format.
We also send the system table to the kernel.
Sponsored by: Netflix
Reviewed by: kevans
Differential Revision: https://reviews.freebsd.org/D38255
Copy the EFI memory tables we were able to get into the MODINFOMD_SMAP
metadata area for the kernel.
Sponsored by: Netflix
Reviewed by: tsoome, kevans
Differential Revision: https://reviews.freebsd.org/D38254
It's just a stub, since the kernel learns of memory via FDT.
Sponsored by: Netflix
Reviewed by: tsoome, kevans
Differential Revision: https://reviews.freebsd.org/D38253
Each architecture will soon be required to provide this to load memory
maps as metadata for the platforms that require it (or a stub function
for those that don't).
Sponsored by: Netflix
Reviewed by: tsoome, kevans
Differential Revision: https://reviews.freebsd.org/D38252
