Commit Graph

26 Commits

Author SHA1 Message Date
Neel Natu
18a2b08e65 Use lapic_ipi_alloc() to dynamically allocate IPI slots needed by bhyve when
vmm.ko is loaded.

Also relocate the 'justreturn' IPI handler to be alongside all other handlers.

Requested by:	kib
2015-03-14 02:32:08 +00:00
Neel Natu
0dafa5cd4b Replace bhyve's minimal RTC emulation with a fully featured one in vmm.ko.
The new RTC emulation supports all interrupt modes: periodic, update ended
and alarm. It is also capable of maintaining the date/time and NVRAM contents
across virtual machine reset. Also, the date/time fields can now be modified
by the guest.

Since bhyve now emulates both the PIT and the RTC there is no need for
"Legacy Replacement Routing" in the HPET so get rid of it.

The RTC device state can be inspected via bhyvectl as follows:
bhyvectl --vm=vm --get-rtc-time
bhyvectl --vm=vm --set-rtc-time=<unix_time_secs>
bhyvectl --vm=vm --rtc-nvram-offset=<offset> --get-rtc-nvram
bhyvectl --vm=vm --rtc-nvram-offset=<offset> --set-rtc-nvram=<value>

Reviewed by:	tychon
Discussed with:	grehan
Differential Revision:	https://reviews.freebsd.org/D1385
MFC after:	2 weeks
2014-12-30 22:19:34 +00:00
Warner Losh
528013d5a8 Retire the '@' symlink. It isn't really needed and causes more
problems than it solves. SYSDIR is already defined almost always and
can be used instead. Working around the one case where it isn't is
much easier than working around the fact that @ may not exist in 18
other places.

Differential Revision: https://reviews.freebsd.org/D1100
2014-11-06 16:48:37 +00:00
John Baldwin
b3ee0d3bbd Add foo_genassym.c files to DPSRCS so dependencies for them are generated.
This ensures these objects are rebuilt to generate an updated header of
assembly constants if needed.
2014-10-27 18:37:11 +00:00
Neel Natu
160ef77abf Move the ACPI PM timer emulation into vmm.ko.
This reduces variability during timer calibration by keeping the emulation
"close" to the guest. Additionally having all timer emulations in the kernel
will ease the transition to a per-VM clock source (as opposed to using the
host's uptime keep track of time).

Discussed with:	grehan
2014-10-26 04:44:28 +00:00
Neel Natu
e1a172e1c2 IFC @r273214 2014-10-20 02:57:30 +00:00
Warner Losh
b82e2e94e2 Fix build to not bogusly always rebuild vmm.ko.
Rename vmx_assym.s to vmx_assym.h to reflect that file's actual use
and update vmx_support.S's include to match. Add vmx_assym.h to the
SRCS to that it gets properly added to the dependency list. Add
vmx_support.S to SRCS as well, so it gets built and needs fewer
special-case goo. Remove now-redundant special-case goo. Finally,
vmx_genassym.o doesn't need to depend on a hand expanded ${_ILINKS}
explicitly, that's all taken care of by beforedepend.

With these items fixed, we no longer build vmm.ko every single time
through the modules on a KERNFAST build.

Sponsored by: Netflix
2014-10-17 13:20:49 +00:00
Neel Natu
8f02c5e456 IFC r271888.
Restructure MSR emulation so it is all done in processor-specific code.
2014-09-20 21:46:31 +00:00
Neel Natu
c3498942a5 Restructure the MSR handling so it is entirely handled by processor-specific
code. There are only a handful of MSRs common between the two so there isn't
too much duplicate functionality.

The VT-x code has the following types of MSRs:

- MSRs that are unconditionally saved/restored on every guest/host context
  switch (e.g., MSR_GSBASE).

- MSRs that are restored to guest values on entry to vmx_run() and saved
  before returning. This is an optimization for MSRs that are not used in
  host kernel context (e.g., MSR_KGSBASE).

- MSRs that are emulated and every access by the guest causes a trap into
  the hypervisor (e.g., MSR_IA32_MISC_ENABLE).

Reviewed by:	grehan
2014-09-20 02:35:21 +00:00
Peter Grehan
6cec9cad76 MFC @ r266724
An SVM update will follow this.
2014-06-03 02:34:21 +00:00
Tycho Nightingale
e883c9bb40 Move the atpit device model from userspace into vmm.ko for better
precision and lower latency.

Approved by:	grehan (co-mentor)
2014-03-25 19:20:34 +00:00
Tycho Nightingale
762fd20804 Replace the userspace atpic stub with a more functional vmm.ko model.
New ioctls VM_ISA_ASSERT_IRQ, VM_ISA_DEASSERT_IRQ and VM_ISA_PULSE_IRQ
can be used to manipulate the pic, and optionally the ioapic, pin state.

Reviewed by:	jhb, neel
Approved by:	neel (co-mentor)
2014-03-11 16:56:00 +00:00
Peter Grehan
485ac45a53 MFC @ r259205 in preparation for some SVM updates. (for real this time) 2014-02-04 06:59:08 +00:00
Neel Natu
08e3ff329a Add HPET device emulation to bhyve.
bhyve supports a single timer block with 8 timers. The timers are all 32-bit
and capable of being operated in periodic mode. All timers support interrupt
delivery using MSI. Timers 0 and 1 also support legacy interrupt routing.

At the moment the timers are not connected to any ioapic pins but that will
be addressed in a subsequent commit.

This change is based on a patch from Tycho Nightingale (tycho.nightingale@pluribusnetworks.com).
2013-11-25 19:04:51 +00:00
Neel Natu
565bbb8698 Move the ioapic device model from userspace into vmm.ko. This is needed for
upcoming in-kernel device emulations like the HPET.

The ioctls VM_IOAPIC_ASSERT_IRQ and VM_IOAPIC_DEASSERT_IRQ are used to
manipulate the ioapic pin state.

Discussed with:	grehan@
Submitted by:	Tycho Nightingale (tycho.nightingale@pluribusnetworks.com)
2013-11-12 22:51:03 +00:00
Neel Natu
03cd05011f Remove the 'vdev' abstraction that was meant to sit on top of device models
in the kernel. This abstraction was redundant because the only device emulated
inside vmm.ko is the local apic and it is always at a fixed guest physical
address.

Discussed with:	grehan
2013-11-04 23:25:07 +00:00
Peter Grehan
ef90af83a5 IFC @ r255692
Comment out IA32_MISC_ENABLE MSR access - this doesn't exist on AMD.
Need to sort out how arch-specific MSRs will be handled.
2013-09-20 00:46:29 +00:00
Peter Grehan
df5e6de3e3 Add in last remaining files to get AMD-SVM operational.
Submitted by:	Anish Gupta (akgupt3@gmail.com)
2013-08-23 00:37:26 +00:00
Ulrich Spörlein
f44b688c57 Fix 'make depend'. 2013-08-21 08:01:52 +00:00
Neel Natu
b01c203325 Corral all the host state associated with the virtual machine into its own file.
This state is independent of the type of hardware assist used so there is
really no need for it to be in Intel-specific code.

Obtained from:	NetApp
2012-10-29 01:51:24 +00:00
Neel Natu
a2da7af6bc Add support for trapping MMIO writes to local apic registers and emulating them.
The default behavior is still to present the local apic to the guest in the
x2apic mode.
2012-09-25 22:31:35 +00:00
Peter Grehan
d7e0c54045 BHyVe's vmm.ko can now be built with the in-tree binutils.
Many thanks to jhb@ for making this happen.
2012-07-11 23:12:17 +00:00
John Baldwin
6c212efc25 Missed this in the previous commit to add 'show vmcs': add opt_ddb.h as
a source file.
2011-06-02 13:57:10 +00:00
Neel Natu
17debe0d59 Remove misleading macro definition (-DOLD_BINUTILS) from CFLAGS.
At this point we require binutils from ports that understands how to
assemble the VT-x instructions.

Discussed with: grehan@
2011-05-17 13:47:32 +00:00
John Baldwin
34a6b2d627 First cut at porting the kernel portions of 221828 and 221905 from the
BHyVe reference branch to HEAD.
2011-05-14 20:35:01 +00:00
Peter Grehan
366f60834f Import of bhyve hypervisor and utilities, part 1.
vmm.ko - kernel module for VT-x, VT-d and hypervisor control
  bhyve  - user-space sequencer and i/o emulation
  vmmctl - dump of hypervisor register state
  libvmm - front-end to vmm.ko chardev interface

bhyve was designed and implemented by Neel Natu.

Thanks to the following folk from NetApp who helped to make this available:
	Joe CaraDonna
	Peter Snyder
	Jeff Heller
	Sandeep Mann
	Steve Miller
	Brian Pawlowski
2011-05-13 04:54:01 +00:00