xen: add SPDX license tags to Xen headers

These are in fact GPLv2 when distributed with the Linux kernel, but the
license also allows MIT if distributed separately. Add the markers to
avoid interfe

xen: add SPDX license tags to Xen headers

These are in fact GPLv2 when distributed with the Linux kernel, but the
license also allows MIT if distributed separately. Add the markers to
avoid interference by automated tools.

Differential Revision: https://reviews.freebsd.org/D32796
Reviewed by: royger

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xen: switch to use headers in contrib

These headers originate with the Xen project and shouldn't be mixed with
the main portion of the FreeBSD kernel. Notably they shouldn't be the
target of clean-u

xen: switch to use headers in contrib

These headers originate with the Xen project and shouldn't be mixed with
the main portion of the FreeBSD kernel. Notably they shouldn't be the
target of clean-up commits.

Switch to use the headers in sys/contrib/xen.

Reviewed by: royger

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xen: remove dead code from gnttab.h

This code was left over when it was imported from Linux. The original
committer thought that those functions would be implemented, so the
prototypes where left in

xen: remove dead code from gnttab.h

This code was left over when it was imported from Linux. The original
committer thought that those functions would be implemented, so the
prototypes where left in place. Delete them at once.

Submitted by: pratyush
Reviewed by: royger
Differential Review: https://reviews.freebsd.org/D15553

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xen: add missing #define in include guard.

Submitted by: Akshay Jaggi <akshay1994.leo@gmail.com>
Reviewed by: royger

Merge from head

Sponsored by: Gandi.net

Finish merging from head, messed up in previous attempt

Merge r286744-r287584 from head.

Merge from HEAD

Merge ^/head r286697 through r286857.

Remove another remnant of PV domU support and assume that we always run
with an automatically translated physmap under XEN.

Reviewed by: royger (earlier version)
Differential Revision: https://revie

Remove another remnant of PV domU support and assume that we always run
with an automatically translated physmap under XEN.

Reviewed by: royger (earlier version)
Differential Revision: https://reviews.freebsd.org/D3325

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Merge sync of head

Reintegrate head: r274132-r277384

Sponsored by: The FreeBSD Foundation

Reintegrate head revisions r273096-r277147

Sponsored by: The FreeBSD Foundation

MFhead @ r275688

Merge ^/head r274961 through r275684.

xen: convert the Grant-table code to a NewBus device

This allows the Grant-table code to attach directly to the xenpv bus,
allowing us to remove the grant-table initialization done in xenpv.

Sponso

xen: convert the Grant-table code to a NewBus device

This allows the Grant-table code to attach directly to the xenpv bus,
allowing us to remove the grant-table initialization done in xenpv.

Sponsored by: Citrix Systems R&D

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IFC @r269962

Submitted by: Anish Gupta (akgupt3@gmail.com)

Merge head from 7/28

Sync to HEAD@r269943.

xen: unify gnttab initialization for PVHVM and PVH

Switch the initialization of gnttab to use an unused physical memory
range for both PVHVM and PVH.

In the past PVHVM was using the xenpci BAR, but

xen: unify gnttab initialization for PVHVM and PVH

Switch the initialization of gnttab to use an unused physical memory
range for both PVHVM and PVH.

In the past PVHVM was using the xenpci BAR, but there's no reason to
do that, and in fact FreeBSD was probably doing it because it was the
way it was done in Windows, were drivers cannot probably request for
unused physical memory ranges, but it was never enforced in the
hypervisor.

Sponsored by: Citrix Systems R&D
Approved by: gibbs

xen/gnttab.c:
- Allocate contiguous physical memory for grant table frames for both
PVHVM and PVH.
- Since gnttab is not a device, use the xenpv device in order to
request for this allocation.

dev/xen/xenpci/xenpcivar.h:
dev/xen/xenpci/xenpci.c:
- Remove the now unused xenpci_alloc_space and xenpci_alloc_space_int
functions.

xen/gnttab.h:
- Change the prototype of gnttab_init and gnttab_resume, that now
takes a device_t parameter.

dev/xen/control/control.c:
x86/xen/xenpv.c:
- Changes to accomodate the new prototype of gnttab_init and
gnttab_resume.

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Merge head r233826 through r256722.

IFC @256277

Approved by: ken (mentor)

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.

Merge from head

IFC @ r255209