CVS log for src/sys/arch/x86/x86/vmt.c

Up to [cvs.NetBSD.org] / src / sys / arch / x86 / x86

Request diff between arbitrary revisions

Keyword substitution: kv
Default branch: MAIN

port-arm/58194: Resurrect vmt(4) from bitrot

On this architecture vmt(4) used to search for a node "/hypervisor" in the
FDT and probed the VMware hypervisor call only when the node was
found. However, things appear to have changed and VMware no longer provides
the FDT node.

Since vmt(4) doesn't actually need to read anything from FDT, and the
hypervisor call logically resides in virtual CPUs themselves, it would be
better to attach it directly to cpu, just like how it's probed on x86.

move vmt(4) from MD to MI, and add support vmt on aarch64. tested on ESXi-Arm Fling

- move from sys/arch/x86/x86/{vmt.c,vmtreg.h,vmtvar.h} to sys/dev/vmt/{vmt_subr.c,vmtreg.h,vmtvar.h},
  and split the attach part of the cpufeaturebus and fdt
- add aarch64 vmware backdoor op
- add include guard to vmt{reg,var}.h
- Yet there is still some little-endian dependency. it needs to be fixed in order to work properly on aarch64eb

Pull up following revision(s) (requested by nakayama in ticket #532):
	sys/arch/x86/x86/vmt.c: revision 1.20
Add line break.

Add line break.

update from HEAD

Pull up following revision(s) (requested by maya in ticket #325):
	sys/arch/x86/x86/vmt.c: revision 1.18
Check that the host supports GET_SPEED as well as GET_VERSION
before deciding vmt_probe has succeeded.
qemu supports GET_VERSION but not the RPC protocol so the probe succeeds
but the attach fails, resulting in "vmt0: failed to open backdoor RPC
channel (TCLO protocol)".  All known versions of vmware support GET_SPEED
and no known qemu versions do, so this prevents it from attempting to
attach (and failing) on qemu while still working on vmware.
stop checking vmt_type to avoid having to adapt this code.
- Taken from openbsd

Update protocol reverse engineering URL to a working one
only mention it once.

From openbsd by Seth Jackson

Check that the host supports GET_SPEED as well as GET_VERSION
before deciding vmt_probe has succeeded.

qemu supports GET_VERSION but not the RPC protocol so the probe succeeds
but the attach fails, resulting in "vmt0: failed to open backdoor RPC
channel (TCLO protocol)".  All known versions of vmware support GET_SPEED
and no known qemu versions do, so this prevents it from attempting to
attach (and failing) on qemu while still working on vmware.

stop checking vmt_type to avoid having to adapt this code.

- Taken from openbsd

Sync with HEAD

remove checks for failure after memory allocation calls that cannot fail:

  kmem_alloc() with KM_SLEEP
  kmem_zalloc() with KM_SLEEP
  percpu_alloc()
  pserialize_create()
  psref_class_create()

all of these paths include an assertion that the allocation has not failed,
so callers should not assert that again.

x86: hypervisor detection from FreeBSD for x2APIC support.

Sync with HEAD.  (Note that most of these changes are simply $NetBSD$
tag issues.)

Sync with HEAD

Fix a breakout of loops

As the comment "find first available ipv4 address" indicates,
if an IP address is found, we need to leave the two nested loops,
a loop for an interface list and a loop for IP addresses of
an interface. However, the original code broke away only from
the inner loop.

The original (wrong) behavior was non-critical, which just
returned a non-first IP address. Unfortunately, after applying
psref, the behavior may call psref_acquire twice to a target
with the same psref object, resulting in a kernel panic eventually.

Sync with HEAD

Sync with HEAD

Apply pserialize and psref to struct ifaddr and its variants

This change makes struct ifaddr and its variants (in_ifaddr and in6_ifaddr)
MP-safe by using pserialize and psref. At this moment, pserialize_perform
and psref_target_destroy are disabled because (1) we don't need them
because of softnet_lock (2) they cause a deadlock because of softnet_lock.
So we'll enable them when we remove softnet_lock in the future.

Sync with HEAD

Switch the address list of intefaces to pslist(9)

As usual, we leave the old list to avoid breaking kvm(3) users.

Sync with HEAD

Protect ifnet list with psz and psref

The change ensures that ifnet objects in the ifnet list aren't freed during
list iterations by using pserialize(9) and psref(9).

Note that the change adds a pslist(9) for ifnet but doesn't remove the
original ifnet list (ifnet_list) to avoid breaking kvm(3) users. We
shouldn't use the original list in the kernel anymore.

Sync with HEAD

Update module dependencies for all the existing modules that depend on sysmon components.

Rebase to HEAD as of a few days ago.

Rebase.

Use IFADDR_FOREACH for iterating if_addrlist of ifnet

sync with head.

for a reference, the tree before this commit was tagged
as yamt-pagecache-tag8.

this commit was splitted into small chunks to avoid
a limitation of cvs.  ("Protocol error: too many arguments")

- Move IFNET_*() macros under #ifdef _KERNEL.
- Replace TAILQ_FOREACH on ifnet with IFNET_FOREACH().

Pull up following revision(s) (requested by pettai in ticket #965):
	sys/arch/x86/x86/vmt.c: revision 1.8
	share/man/man4/man4.x86/vmt.4: revision 1.4
Synchronize the clock periodically in vmt(4).
Add periodic clock synchronization to vmt(4) so that the guest clock
remains synchronized even when the host is suspended (which is a very
typical situation in a laptop).
Do this by default once per minute, but provide a sysctl to tune this
value (machdep.vmt0.clock_sync.period).
Sent to tech-kern@ for review and addressed a couple of issues.

Checkpoint work in progress:
- Move PCB structures under __INPCB_PRIVATE, adjust most of the callers
  and thus make IPv4 PCB structures mostly opaque.  Any volunteers for
  merging in6pcb with inpcb (see rpaulo-netinet-merge-pcb branch)?
- Move various global vars to the modules where they belong, make them static.
- Some preliminary work for IPv4 PCB locking scheme.
- Make raw IP code mostly MP-safe.  Simplify some of it.
- Rework "fast" IP forwarding (ipflow) code to be mostly MP-safe.  It should
  run from a software interrupt, rather than hard.
- Rework tun(4) pseudo interface to be MP-safe.
- Work towards making some other interfaces more strict.

resync from head

Synchronize the clock periodically in vmt(4).

Add periodic clock synchronization to vmt(4) so that the guest clock
remains synchronized even when the host is suspended (which is a very
typical situation in a laptop).

Do this by default once per minute, but provide a sysctl to tune this
value (machdep.vmt0.clock_sync.period).

Sent to tech-kern@ for review and addressed a couple of issues.

synchronize the guest clock with the host on attach and resume

mark vm_reg members as volatile instead of building this with -O0

report guest type of "other" for i386 and "other-64" for amd64

use PRId64 for time_t format

don't allow module autounload

handle OS_Resume events by sending a sleep pswitch "release" event

add a port of the VMware Tools driver vmt(4) from OpenBSD