The APs pcpu area is zeroed in init_secondary() by pcpu_init(), so the
early initialization in pmap_bootstrap() is nop.
Fixes: 42f722e721cd010ae5759a4b0d3b7b93c2b9cad2ESC
Reviewed by: markj
Sponsored by: The FreeBSD Foundation
Differential revision: https://reviews.freebsd.org/D39945
This change eliminates the struct pmap_pcid array embedded into struct
pmap and sized by MAXCPU, which would bloat with MAXCPU increase. Also
it removes false sharing of cache lines, since the array elements are
mostly locally accessed by corresponding CPUs.
Suggested by: mjg
Reviewed by: markj
Tested by: pho
Sponsored by: The FreeBSD Foundation
Differential revision: https://reviews.freebsd.org/D39890
Cpuid is used to index the pmap->pm_pcids array only.
Reviewed by: markj
Tested by: pho
Sponsored by: The FreeBSD Foundation
Differential revision: https://reviews.freebsd.org/D39890
to initialize pm_pcids array for a new user pmap
Reviewed by: markj
Tested by: pho
Sponsored by: The FreeBSD Foundation
Differential revision: https://reviews.freebsd.org/D39890
and rename the structure to pmap_pcid.
Reviewed by: markj
Tested by: pho
Sponsored by: The FreeBSD Foundation
Differential revision: https://reviews.freebsd.org/D39890
As of version 2.6.0 of the Linux kernel, dev_t is a 32-bit unsigned integer
on all platforms. Prior the 2.6 kernel dev_t type was an unsigned short.
However, since the firs commit of the Linuxulator, mknod syscall get int dev
argument.
Also, there is some confusion here, while the kernel declares a dev_t type
as a 32-bit sized, the user-space dev_t type can be size of 64 bits, e.g.,
in the Glibc library.
To avoid confusion and to help porting of the Linuxulator to other platforms
use explicit l_dev_t for dev argument of mknod syscalls.
This avoids bloating the BSS when MAXCPU is large.
No functional change intended.
PR: 269572
Reviewed by: corvink, rew
Tested by: rew
MFC after: 2 weeks
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D39805
This fixes the detection of pending interrupts when pirval is 0 and the
pending bit is set
More information how this situation occurs, can be found here:
c5b5f2d808/sys/amd64/vmm/intel/vmx.c (L4016-L4031)
Reviewed by: corvink, markj
Fixes: 02cc877968bbcd57695035c67114a67427f54549 ("Recognize a pending virtual interrupt while emulating the halt instruction.")
MFC after: 1 week
Sponsored by: vStack
Differential Revision: https://reviews.freebsd.org/D39620
The driver is enormous and rarely used.
text data bss dec hex filename
23076646 1870505 4415872 29363023 0x1c00b4f kernel.before
20017433 1870305 4416000 26303738 0x1915cfa kernel.after
People using the driver will need to add pmspcv_load="YES" to
their loader.conf.
Reviewed by: jhb
Relnotes: yes
Sponsored by: Rubicon Communications, LLC ("Netgate")
Differential Revision: https://reviews.freebsd.org/D39816
This is required to announce support for some accelerated AES
operations. AVX512BW indicates support for the AVX512-FP16 extension
and AVX512VL indicates support for the use of AVX512 instructions with
vector lengths smaller than 512 bits.
VAES and VPCLMULQDQ extensions indicate that VEX-prefixed AES-NI and
pclmulqdq instructions are supported.
All of these bits are needed for OpenSSL to use VAES to accelerate
AES-GCM transforms.
Reviewed by: corvink, kib, jhb
MFC after: 2 weeks
Sponsored by: Stormshield
Sponsored by: Klara, Inc.
Differential Revision: https://reviews.freebsd.org/D39781
Export default MINSIGSTKSZ value for the x86 until we do not preserve AVX
registers in the signal context.
Differential Revision: https://reviews.freebsd.org/D39644
MFC after: 1 month
Have more accruate comments. While #if, #else, etc are copied to the
header files, lines that don't start with # are not. And #include files
are only output to sysinc (which winds up at the front of init_sysent.c
which seems a bit odd). This is all radically undocumented, and likely
has drifted somewhat from 4.4BSD and what other systems do (they've
drifted too, fwiw).
Sponsored by: Netflix
The explanation from https://reviews.freebsd.org/D39637 by stevek:
The "use_xsave" variable is a global and that is only supposed to be
initialized early before scheduling gets started. However, with the way
the ifuncs for "fpusave" and "fpurestore" are implemented, the value
could be changed at runtime when scheduling is active if "use_xsave"
was set to 0 by the tunable. This leaves a window of opportunity where
"use_xsave" gets re-initialized to 1 and a context switch could occur
with a thread that was not set up to be able to use xsave functionality.
This can lead to an "privileged instruction fault".
The fix is to protect "use_xsave" from being initialized more than once.
Reported and reviewed by: stevek
Sponsored by: The FreeBSD Foundation
MFC after: 1 week
Differential revision: https://reviews.freebsd.org/D39660
When vm_map_remove() is called from vm_swapout_map_deactivate_pages()
due to swapout, PKRU attributes for the removed range must be kept
intact. Provide a variant of pmap_remove(), pmap_map_delete(), to
allow pmap to distinguish between real removes of the UVA mappings
and any other internal removes, e.g. swapout.
For non-amd64, pmap_map_delete() is stubbed by define to pmap_remove().
Reported by: andrew
Reviewed by: markj
Sponsored by: The FreeBSD Foundation
MFC after: 1 week
Differential revision: https://reviews.freebsd.org/D39556
Move the xenisrc structure which needs to be shared between the core Xen
interrupt code and architecture-dependent code into a separate header. A
similar situation exists for the NR_EVENT_CHANNELS constant.
Turn xi_intsrc into a type definition named xi_arch to reflect the new
purpose of being an architectural variable for the interrupt source.
This was originally implemented by Julien Grall, but has been heavily
modified. The core side was renamed "intr-internal.h" and is #include'd
by "arch-intr.h" instead of the other way around. This allows the
architecture to add function definitions which use struct xenisrc.
The original version only moved xi_intsrc into xen_arch_isrc_t. Moving
xi_vector was done by the submitter.
The submitter had also moved xi_activehi and xi_edgetrigger into
xen_arch_isrc_t. Those disappeared with the removal of PVHv1 support.
Copyright note. The current xenisrc structure was introduced at
76acc41fb7 by Justin T. Gibbs. Traces remain, but the strength of
Copyright claims from before 2013 seem pretty weak.
Reviewed by: royger
Submitted by: Elliott Mitchell <ehem+freebsd@m5p.com>, 2021-03-17 19:09:01
Original implementation: Julien Grall <julien@xen.org>, 2015-10-20 09:14:56
Differential Revision: https://reviews.freebsd.org/D30648
[royger]
- Adjust some line lengths
- Fix comment about NR_EVENT_CHANNELS after movement.
- Use #include instead of symlinks.
xen_intr_handle_upcall() has two interfaces. It needs to be called by
the x86 assembly code invoked by the APIC. Second, it needs to be called
as a driver_filter_t for the XenPCI code and for architectures besides
x86.
Unfortunately the driver_filter_t interface was implemented as a wrapper
around the x86-APIC interface. Now create a simple wrapper for the
x86-APIC code, which calls an architecture-independent
xen_intr_handle_upcall().
When called via intr_event_handle(), driver_filter_t functions expect
preemption to be disabled. This removes the need for
critical_enter()/critical_exit() when called this way.
The lapic_eoi() call is only needed on x86 in some cases when invoked
directly as an APIC vector handler.
Additionally driver_filter_t functions have no need to handle interrupt
counters. The intrcnt_add() calling function was reworked to match the
current situation. intrcnt_add() is now only called via one path.
The increment/decrement of curthread->td_intr_nesting_level had
previously been left out. Appears this was mostly harmless, but this
was noticed during implementation and has been added.
CONFIG_X86 is a leftover from use with Linux. While the barrier isn't
needed for FreeBSD on x86, it will be needed for FreeBSD on other
architectures.
Copyright note. xen_intr_intrcnt_add() was introduced at 76acc41fb7
by Justin T. Gibbs. xen_intrcnt_init() was introduced at fd036deac1
by John Baldwin.
sys/x86/xen/xen_arch_intr.c was originally created by Julien Grall in
2015 for the purpose of holding the x86 interrupt interface. Later it
was found xen_intr_handle_upcall() was better earlier, and the x86
interrupt interface better later. As such the filename and header list
belong to Julien Grall, but what those were created for is later.
Reviewed by: royger
Differential Revision: https://reviews.freebsd.org/D30006
This overlaps the purpose of __XEN_INTERFACE_VERSION__. Remove Xen 3.0.2
compatibility. __XEN_INTERFACE_VERSION__ has compatibility to Xen 3.2.8
enabled. As Xen 3.3 was released almost 15 years ago, it seems unlikely
anyone hasn't updated.
Reviewed by: royger
The present implementation is only for x86. Other architectures need
adjustments for querying presence of EFI.
Xen's EFI support is also quite troublesome on non-x86. This is being
slowly remedied, but until in better shape the EFI clock functionality
should be disabled.
Reviewed by: royger
Differential Revision: https://reviews.freebsd.org/D31065
Add MODULE_PNP_INFO() to the driver to make it autoload if not linked
statically into the kernel. Remove the device from amd64/i386 GENERIC.
Reviewed by: imp
Differential Revision: https://reviews.freebsd.org/D35074
NETLINK is going to replace rtsock and a number of other ioctl/sysctl interfaces.
In-base utilies such as route(8), netstat(8) and soon ifconfig(8)
are being converted to use netlink sockets as a transport between
kernel and userland.
In the current configuration, it still possible have the kernel
without NETLINK (`nooptions NETLINK`) and use the aforementioned
utilies by buidling the world with `WITHOUT_NETLINK` src.conf knob.
However, this approach does not cover the cases when person unintentionally
builds a custom kernel without netlink and tries to use the standard userland.
This change adds `option NETLINK` to the default options for each
architecture, fixing the custom kernel issue.
For arm, this change uses `std.armv6` and `std.armv7` (netlink already in)
instead of DEFAULTS.
Reviewed By: imp
Differential Revision: https://reviews.freebsd.org/D39339
Now that the atomic macros are always genuinely atomic on x86, they can
be used for synchronization with Xen. A single core VM isn't too
unusual, but actual single core hardware is uncommon.
Replace an open-coding of evtchn_clear_port() with the inline.
Substantially inspired by work done by Julien Grall <julien@xen.org>,
2014-01-13 17:40:58.
Reviewed by: royger
MFC after: 1 week
This is a userland-only pointer that isn't relevant to the kernel and
doesn't belong in the ioctl structure shared between userland and the
kernel. For the kernel, the old structure for the ioctl is still
supported under COMPAT_FREEBSD13.
This changes vm_snapshot_req() in libvmmapi to accept an explicit
vmctx argument.
It also changes vm_snapshot_guest2host_addr to take an explicit vmctx
argument. As part of this change, move the declaration for this
function and its wrapper macro from vmm_snapshot.h to snapshot.h as it
is a userland-only API.
Reviewed by: corvink, markj
Differential Revision: https://reviews.freebsd.org/D38125
This replaces the 'struct vm, int vcpuid' tuple passed to most API
calls and is similar to the changes recently made in vmm(4) in the
kernel.
struct vcpu is an opaque type managed by libvmmapi. For now it stores
a pointer to the VM context and an integer id.
As an immediate effect this removes the divergence between the kernel
and userland for the instruction emulation code introduced by the
recent vmm(4) changes.
Since this is a major change to the vmmapi API, bump VMMAPI_VERSION to
0x200 (2.0) and the shared library major version.
While here (and since the major version is bumped), remove unused
vcpu argument from vm_setup_pptdev_msi*().
Add new functions vm_suspend_all_cpus() and vm_resume_all_cpus() for
use by the debug server. The underyling ioctl (which uses a vcpuid of
-1) remains unchanged, but the userlevel API now uses separate
functions for global CPU suspend/resume.
Reviewed by: corvink, markj
Differential Revision: https://reviews.freebsd.org/D38124
Revision r333125 AKA 986c4ca387 forced clear cpu_stdext_feature3
on suspend, since at that time microcode update was not reloaded
early on resume. Then, revision 050f5a8405 started re-reading
cpu_stdext_feature3 again. Since modern CPUs do not require mitigations
from the Skylake era, this went unnoticed for some time.
Keep zeroing cpu_stdext_feature3 on suspend, but re-read it in more
controlled way on resume after microcode is reloaded, and recalculate
active workarounds based on actual microcode capabilities.
Reported and tested by: romain
Reviewed by: emaste, markj
Sponsored by: The FreeBSD Foundation
MFC after: 1 week
Differential revision: https://reviews.freebsd.org/D39146
ipi counters are missing in bhyvectl's output because vm_maxcpu is 0
when initializing them. That's because vmm_stat_register is executed
before vmm_init.
Instead of directly fixing it, there's a better solution in illumos
which is cherry picked:
65a3bc8373
It replaces the matrix statistic by two counters per vcpu. One for
counting the ipis to the vcpu and one counting the ipis received by the
vcpu. This has several advantages:
- A matrix statistic becomes huge when using many vcpus.
- A matrix statistic easily reaches the MAX_VMM_STAT_ELEMS limit.
- Two counters are enough in most cases. DTrace can be used for more
advanced debugging purposes.
- A matrix statistic wastes memory. The matrix size is determined by
vm_maxcpu regardless of the number of vcpus assigned to the vm.
Reviewed by: corvink, markj
Fixes: ee98f99d7a ("vmm: Convert VM_MAXCPU into a loader tunable hw.vmm.maxcpu.")
MFC after: 1 week
Sponsored by: vStack
Differential Revision: https://reviews.freebsd.org/D39038
This makes the detection of VMs common between platforms that
have SMBios.
Reviewed by: imp, kib
Differential Revision: https://reviews.freebsd.org/D38800
vmx_snapshot() and svm_snapshot() do not save any data and error occurs at
resume:
Restoring kernel structs...
vm_restore_kern_struct: Kernel struct size was 0 for: vmx
Failed to restore kernel structs.
Reviewed by: corvink, markj
Fixes: 39ec056e6d ("vmm: Rework snapshotting of CPU-specific per-vCPU data.")
MFC after: 2 weeks
Sponsored by: vStack
Differential Revision: https://reviews.freebsd.org/D38476
After suspend/resume Ubuntu 20.04 and 22.04 installer can hang if
tsc-early clocksource has a big skew.
Reviewed by: corvink, jhb
Fixes: a7db532e3a ("vmm: Simplify saving of absolute TSC values in snapshots.")
MFC after: 2 weeks
Sponsored by: vStack
Differential Revision: https://reviews.freebsd.org/D38474
Most options in kernel config files use "options<space><tab>OPTION".
This allows the option to be commented out without shifting columns.
A few options had two tabs, and some had spaces. Make them consistent.
They don't provide any value and are quite arbitrary.
Note arm64 GENERIC-MMCCAM was already excluded, just not the NODEBUG
variant.
The option is already build-tested with arm64 LINT kernel.
Reviewed by: manu
Differential Revision: https://reviews.freebsd.org/D38458
To avoid confusing people, rename linux_timer.h to linux_time.h,
as linux_timer.c is the implementation of timer syscalls only,
while linux_time.c contains implementation of all stuff declared
in linux_time.h.
MFC after: 2 weeks
Include vm headers directly where they needed. The linux_util.h included
in a most source files of the Linuxulator, avoid collecting a rarely used
includes here.
MFC after: 2 weeks
Since Linux emulation layer build options was removed there is no reason
to keep opt_compat.h.
Reviewed by: emaste
Differential Revision: https://reviews.freebsd.org/D38548
MFC after: 2 weeks
These changes unbreak AP startup when using a 13.1-RELEASE bhyve
executable with a newer kernel:
- Correct the destination mask for the VM_EXITCODE_IPI message generated
by an INIT or STARTUP IPI in vlapic_icrlo_write_handler().
- Only initialize vlapics on active vCPUs. 13.1-RELEASE bhyve activates
AP vCPUs only after the BSP starts them with an IPI, and vmm now
allocates vcpu structures lazily, so the STARTUP handling in
vm_handle_ipi() could trigger a page fault.
- Fix an off-by-one setting the vcpuid in a VM_EXITCODE_SPINUP_AP
message.
Fixes: 7c326ab5bb ("vmm: don't lock a mtx in the icr_low write handler")
Reviewed by: jhb, corvink
MFC after: 2 weeks
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D38446
... regardless of the kernel config options.
It is reported that llvm16 ld.lld warns about undefined symbols
referenced by the VERSION script.
Reviewed by: emaste, val_packett.cool
Discussed with: jrtc27
Sponsored by: The FreeBSD Foundation
MFC after: 1 week
Differential revision: https://reviews.freebsd.org/D38392
Use native routines to fixup initial process stack. On Arm64 linux_elf_fixup() is
noop, as it do the stack fixup (room for argc) in the linux_copyout_strings().
MFC after: 1 week
A vcpu only checks if a rendezvous is in progress or not to decide if it
should handle a rendezvous. This could lead to spurios rendezvous where
a vcpu tries a handle a rendezvous it isn't part of. This situation is
properly handled by vm_handle_rendezvous but it could potentially
degrade the performance. Avoid that by an early check if the vcpu is
part of the rendezvous or not.
At the moment, rendezvous are only used to spin up application
processors and to send ioapic interrupts. Spinning up application
processors is done in the guest boot phase by sending INIT SIPI
sequences to single vcpus. This is known to cause spurious rendezvous
and only occurs in the boot phase. Sending ioapic interrupts is rare
because modern guest will use msi and the rendezvous is always send to
all vcpus.
Reviewed by: jhb
MFC after: 1 week
Sponsored by: Beckhoff Automation GmbH & Co. KG
Differential Revision: https://reviews.freebsd.org/D37390
Observed on a couple Ice Lake-SP platforms (Intel Coyote Pass, Dell
R750), there are more than 8 DRHD sections enumerated in the DMAR ACPI
section. Since the previous limit was 8, this resulted in some of these
not being parsed by vtd when the iommu is initialized; in this case when
PCI devices are being passthru'd to a bhyve VM.
This omission later causes a kernel panic later in initialization when
devices could not be found in a valid DRHD scope because the DHRD
containing the device's scope was not added to vtd.
Signed-off-by: Eric Joyner <erj@FreeBSD.org>
PR: 268486
Sponsored by: Intel Corporation
Reviewed by: rew@, corvink@
MFC after: 1 day
Differential Revision: https://reviews.freebsd.org/D38285
This is done by reverting CR4_PKE bit, because we perform %CR4
initialization in initializecpu(), and the function is called before
xsave_mask is read. To not redo the whole early initialization
sequence for the corner case, this should be good enough.
Reported by: jhb
Reviewed by: jhb, markj
Sponsored by: The FreeBSD Foundation
MFC after: 1 week
Differential revision: https://reviews.freebsd.org/D38219
Remove the platform-specific definitions of VM_BATCHQUEUE_SIZE
for amd64 and powerpc64, and instead treat all 64-bit platforms
identically. This has the effect of increasing the arm64
and riscv VM_BATCHQUEUE_SIZE to match that of other platforms.
Reviewed by: jhb, markj
Sponsored by: Netflix
Differential Revision: https://reviews.freebsd.org/D37707
The vmm module destroys the host_domain before unloading the ppt module
causing a use after free. This can happen when kldunload'ing vmm.
Reviewed by: markj, jhb
Differential Revision: https://reviews.freebsd.org/D38072
The consumers of vm_cleanup() are vm_reinit() and vm_destroy().
The vm_reinit() call path is, here vmmdev_ioctl() takes mem_segs_lock:
vmmdev_ioctl()
vm_reinit()
vm_cleanup(destroy=false)
The call path for vm_destroy() is (mem_segs_lock not taken):
sysctl_vmm_destroy()
vmmdev_destroy()
vm_destroy()
vm_cleanup(destroy=true)
Fix this by taking mem_segs_lock in vm_cleanup() when destroy == true.
Reviewed by: corvink, markj, jhb
Fixes: 67b69e76e8 ("vmm: Use an sx lock to protect the memory map.")
Differential Revision: https://reviews.freebsd.org/D38071
Netlink is a communication protocol defined in RFC 3549. It is async,
TLV-based protocol, providing 1-1 and 1-many communications between kernel
and userland. Netlink is currently used in Linux kernel to modify, read and
subscribe for nearly all networking states. Interface state, addresses, routes,
firewall, rules, fibs, etc, are controlled via Netlink.
Netlink support was added in D36002. It has got a number of improvements and
first customers since then:
* net/bird2 got netlink support, enabling route multipath in FreeBSD
* netlink-based devd notifications are being worked on ( D37574 ).
* linux(4) fully supports and depends on Netlink
Enabling Netlink in GENERIC targets two goals.
The first one is to provide stability for the third-party userland applications,
so they can rely on the fact that netlink always exists since 14.0 and potentially 13.2.
Loadable module makes life of the app delepers harder. For example, `net/bird2` can be
either build with netlink or rtsock support, but not both.
The second goal is to enable gradual conversion of the base userland tools
to use netlink(4) interfaces. Converting tools like netstat (D36529), route,
ifconfig one-by-one simplifies testing and addressing the feedback.
Othewise, switching all base to use netlink at once may be too big of a leap.
This change targets amd64, the other architectures will follow soon.
Differential Revision: https://reviews.freebsd.org/D37783
Guard pmap_invlpg() definition with checks that only provide it when
both sys/pcpu.h and machine/cpufunc.h were already included.
Requested by: Elliott Mitchell
Sponsored by: The FreeBSD Foundation
MFC after: 1 week
In particular, do not enable the workaround if INVPCID is not supported
by the core.
Reported by: "Chen, Alvin W" <Weike.Chen@Dell.com>
Reviewed by: markj
Sponsored by: The FreeBSD Foundation
MFC after: 1 week
Differential revision: https://reviews.freebsd.org/D37940
If processor prefetches neighboring TLB entries to the one being accessed
(as some have been reported to do), then the spin lock does not prevent
the situation described in the "AMD64 Architecture Programmer's Manual
Volume 2: System Programming" rev. 3.23, "7.3.1 Special Coherency
Considerations".
Reported and reviewed by: alc
Sponsored by: The FreeBSD Foundation
MFC after: 1 week
Differential revision: https://reviews.freebsd.org/D37770
A hypothetical CPU bug makes invalidation of global PTEs using INVLPG
in pcid mode unreliable, it seems. The workaround is applied for all
CPUs with small cores, since we do not know the scope of the issue, and
the right fix.
Reviewed by: alc (previous version)
Discussed with: emaste, markj
Tested by: karels
PR: 261169, 266145
Sponsored by: The FreeBSD Foundation
MFC after: 1 week
Differential revision: https://reviews.freebsd.org/D37770
Rather than waiting until the batchqueue is full to acquire the lock &
process the queue, we now start trying to acquire the lock using trylocks
when the batchqueue is 1/2 full. This removes almost all contention on the
vm pagequeue mutex for for our busy sendfile() based web workload.
It also greadly reduces the amount of time a network driver ithread
remains blocked on a mutex, and eliminates some packet drops under
heavy load.
So that the system does not loose the benefit of processing large
batchqueues, I've doubled the size of the batchqueues. This way, when
there is no contention, we process the same batch size as before.
This has been run for several months on a busy Netflix server, as well
as on my personal desktop.
Reviewed by: markj
Sponsored by: Netflix
Differential Revision: https://reviews.freebsd.org/D37305
On amd64, don't abort promotion due to a missing accessed bit in a
mapping before possibly write protecting that mapping. Previously,
in some cases, we might not repromote after madvise(MADV_FREE) because
there was no write fault to trigger the repromotion. Conversely, on
arm64, don't pointlessly, yet harmlessly, write protect physical pages
that aren't part of the physical superpage.
Don't count aborted promotions due to explicit promotion prohibition
(arm64) or hardware errata (amd64) as ordinary promotion failures.
Reviewed by: kib, markj
MFC after: 2 weeks
Differential Revision: https://reviews.freebsd.org/D36916
These are manipulating state in a ppt(4) device none of which is
vCPU-specific. Mark the vcpu fields in the relevant ioctl structures
as unused, but don't remove them for now.
Reviewed by: corvink, markj
Differential Revision: https://reviews.freebsd.org/D37639
Support for rendezvous outside of a vcpu context (vcpuid of -1) was
removed in commit 949f0f47a4, and the vm, vcpuid argument pair was
replaced by a single struct vcpu pointer in commit d8be3d523d.
Reported by: andrew
Remove the KPI/KBI changes from ieee80211_node.h and always use the
macros to pass in __func__ and __LINE__ to the functions.
The actual implementations are prefixed by "_" rather than suffixed
by "_debug" as they no longer are "debug"-specific.
Some of the select functions were not actually using the passed in
func, line options; however they are calling other functions which
use them. Directly call the internal implementation in those cases
passing the arguments on.
Use a file-local __debrefcnt_used define to mark the arguments __unused
in cases when we compile without IEEE80211_DEBUG_REFCNT and hope the
toolchain is intelligent enough to not pass them at all in those cases.
Also _ieee80211_free_node() now has a conflict so make the previous
_ieee80211_free_node() the new __ieee80211_free_node().
Add IEEE80211_DEBUG_REFCNT to the NOTES file on amd64 to keep exercising
the option.
Sponsored by: The FreeBSD Foundation
X-MFC: never
Discussed on: freebsd-wireless
Reviewed by: adrian
Differential Revision: https://reviews.freebsd.org/D37529
x2apic accesses are handled by a wrmsr exit. This handler is called in a
critical section. So, we can't lock a mtx in the icr_low handler.
Reported by: kp, pho
Tested by: kp, pho
Approved by: manu (mentor)
Fixes: c0f35dbf19 vmm: Use a cpuset_t for vCPUs waiting for STARTUP IPIs.
MFC after: 1 week
MFC with: c0f35dbf19
Sponsored by: Beckhoff Automation GmbH & Co. KG
Differential Revision: https://reviews.freebsd.org/D37452
When a vcpu sees that a rendezvous is in progress, it exits and tries to
handle the rendezvous. The vcpu doesn't check if it's part of the
rendezvous or not. If the vcpu isn't part of the rendezvous, the
rendezvous could be done before it reaches the assertion. This will
cause a panic.
The assertion isn't needed at all because vm_handle_rendezvous properly
handles a spurious rendezvous. So, we can just remove it.
PR: 267779
Reviewed by: jhb, markj
Tested by: bz
Approved by: manu (mentor)
MFC after: 1 week
Sponsored by: Beckhoff Automation GmbH & Co. KG
Differential Revision: https://reviews.freebsd.org/D37417
