CVS commit: src/sys/arch/xen

["Jaromir Dolecek" <jdolecek%netbsd.org@localhost>]

Module Name:    src
Committed By:   jdolecek
Date:           Thu Apr  9 19:26:38 UTC 2020

Modified Files:
        src/sys/arch/xen/conf: std.xenversion
        src/sys/arch/xen/include: xen.h
        src/sys/arch/xen/x86: xen_bus_dma.c
        src/sys/arch/xen/xen: balloon.c xengnt.c

Log Message:
update to __XEN_INTERFACE_VERSION__ 0x0003020a aka Xen 3.2.10

this brings grant memory v2 support:
- status separated from flags - revoking access needs just memory barrier,
  no need for expensive cmpxchg16 any more
- sub-page hypervisor copy-only grants, to be used by xennet(4)
- 64-bit frame, i.e. support for DomU RAM >16TB

the grant table is now always allocated on boot to maximum size, it's now
never grown in runtime; switch back to regular kmem_alloc()/kmem_free()

code now requires v2 support, no compatibility for grant version 1 retained -
Xen v2 support predates all currently supported Xen versions

also interface for baloon changed slightly, code updated


To generate a diff of this commit:
cvs rdiff -u -r1.1 -r1.2 src/sys/arch/xen/conf/std.xenversion
cvs rdiff -u -r1.44 -r1.45 src/sys/arch/xen/include/xen.h
cvs rdiff -u -r1.28 -r1.29 src/sys/arch/xen/x86/xen_bus_dma.c
cvs rdiff -u -r1.19 -r1.20 src/sys/arch/xen/xen/balloon.c
cvs rdiff -u -r1.30 -r1.31 src/sys/arch/xen/xen/xengnt.c

Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.