xen: introduce a per-arch scratch mapping ranges

The current approach is to create foreign mappings in any unpopulated address
on the memory map. This however can cause issues, as late-loaded drive

xen: introduce a per-arch scratch mapping ranges

The current approach is to create foreign mappings in any unpopulated address
on the memory map. This however can cause issues, as late-loaded drivers could
then found their MMIO region has been stolen to be used as foreign mapping
scratch space (due to the Xen drivers having started first).

Add a local resource manager to the xenpv bus driver, architectures can add
suitable resources to that resource manager at boot in order to be used in
preference of the generic MMIO resource allocator.

No functional change, as the introduced scratch mapping range is not yet
populated.

Sponsored by: Cloud Software Group
MFC after: 1 week
Reviewed by: Elliott Mitchell <ehem+freebsd@m5p.com>
Differential revision: https://reviews.freebsd.org/D46122

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sys: Automated cleanup of cdefs and other formatting

Apply the following automated changes to try to eliminate
no-longer-needed sys/cdefs.h includes as well as now-empty
blank lines in a row.

Remov

sys: Automated cleanup of cdefs and other formatting

Apply the following automated changes to try to eliminate
no-longer-needed sys/cdefs.h includes as well as now-empty
blank lines in a row.

Remove /^#if.*\n#endif.*\n#include\s+<sys/cdefs.h>.*\n/
Remove /\n+#include\s+<sys/cdefs.h>.*\n+#if.*\n#endif.*\n+/
Remove /\n+#if.*\n#endif.*\n+/
Remove /^#if.*\n#endif.*\n/
Remove /\n+#include\s+<sys/cdefs.h>\n#include\s+<sys/types.h>/
Remove /\n+#include\s+<sys/cdefs.h>\n#include\s+<sys/param.h>/
Remove /\n+#include\s+<sys/cdefs.h>\n#include\s+<sys/capsicum.h>/

Sponsored by: Netflix

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sys: Remove $FreeBSD$: one-line .c pattern

Remove /^[\s*]*__FBSDID\("\$FreeBSD\$"\);?\s*\n/

pmap_unmapdev/bios: Accept a pointer instead of a vm_offset_t.

This matches the return type of pmap_mapdev/bios.

Reviewed by: kib, markj
Sponsored by: DARPA
Differential Revision: https://reviews.f

pmap_unmapdev/bios: Accept a pointer instead of a vm_offset_t.

This matches the return type of pmap_mapdev/bios.

Reviewed by: kib, markj
Sponsored by: DARPA
Differential Revision: https://reviews.freebsd.org/D36548

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xen: Remove unused devclass arguments to DRIVER_MODULE.

xen: Use devclass_find to lookup devclasses in identify.

While here, use driver->name instead of hardcoding the xenpv and
xen_et strings both for devclass_find() and BUS_ADD_CHILD().

Reviewed by: E

xen: Use devclass_find to lookup devclasses in identify.

While here, use driver->name instead of hardcoding the xenpv and
xen_et strings both for devclass_find() and BUS_ADD_CHILD().

Reviewed by: Elliott Mitchell <ehem+freebsd@m5p.com>, imp, royger
Differential Revision: https://reviews.freebsd.org/D35001

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xen: use correct cache attributes for Xen specific memory regions

bus_activate_resource maps memory regions as uncacheable on x86, which
is more strict than required for regions allocated using xenm

xen: use correct cache attributes for Xen specific memory regions

bus_activate_resource maps memory regions as uncacheable on x86, which
is more strict than required for regions allocated using xenmem_alloc,
so don't rely on bus_activate_resource and instead map the region
using pmap_mapdev_attr and VM_MEMATTR_XEN as the cache attribute.

Sponsored by: Citrix Systems R&D

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xen/xenpv: remove low memory limit for non-x86

For embedded devices reserved addresses will be known in advance. More
recently added devices will also likely be correctly updated. As a
result usin

xen/xenpv: remove low memory limit for non-x86

For embedded devices reserved addresses will be known in advance. More
recently added devices will also likely be correctly updated. As a
result using any available address is reasonable on non-x86.

Reviewed by: royger
Differential Revision: https://reviews.freebsd.org/D29304

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xen: create VM_MEMATTR_XEN for Xen memory mappings

The requirements for pages shared with Xen/other VMs may vary from
architecture to architecture. As such create a macro which various
architecture

xen: create VM_MEMATTR_XEN for Xen memory mappings

The requirements for pages shared with Xen/other VMs may vary from
architecture to architecture. As such create a macro which various
architectures can use.

Remove a use of PAT_WRITE_BACK in xenstore.c. This is a x86-ism which
shouldn't have been present in a common area.

Original idea: Julien Grall <julien@xen.org>, 2014-01-14 06:44:08
Approach suggested by: royger
Reviewed by: royger, mhorne
Differential Revision: https://reviews.freebsd.org/D29351

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xen: move x86/xen/xenpv.c to dev/xen/bus/xenpv.c

Minor changes are necessary to make this processor-independent, but
moving the file out of x86 and into common is the first step (so
others don't add

xen: move x86/xen/xenpv.c to dev/xen/bus/xenpv.c

Minor changes are necessary to make this processor-independent, but
moving the file out of x86 and into common is the first step (so
others don't add /more/ x86-isms).

Submitted by: Elliott Mitchell <ehem+freebsd@m5p.com>
Reviewed by: royger
Differential Revision: https://reviews.freebsd.org/D29042

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