[Xen-devel] PVH backports to 4.9 and 4.8

[George Dunlap <george.dunlap@xxxxxxxxxx>]

Part of our solution to XSA-254 SP3 (aka "Meltdown") is to backport
the PVH mode from 4.10 to 4.9 and 4.8.  This will first allow people
able to run PVH kernels to switch their PV guests directly to PVH
guests; and second, eventually enable the backport of patches which
will enable transparent changing of PV guests into PVH guests.

All of the hypervisor support seems to have existed already in 4.8, so
the only backports involve toolstack patches.

I've put up two trees for a first-cut backport of the PVH
functionality, to 4.9 and 4.8 here:

git://xenbits.xen.org/people/gdunlap/xen.git

Branches out/pvh-backport/4.8/v1 and out/pvh-backport/4.9/v1

Below are the patches backported from 4.10 to 4.9 (23 patches total):

Roger Pau Monne libxl: add is_default checkers for string and timer_mode
types
Roger Pau Monne libxl: introduce a way to mark fields as deprecated in
the idl
Roger Pau Monne xl: parsing code movement
Roger Pau Monne libxl/xl: use the new location of domain_build_info fields
Roger Pau Monne xl: introduce a domain type option
Roger Pau Monne xl: introduce a firmware option
Roger Pau Monne libxl: introduce a PVH guest type
Roger Pau Monne libxl: allow PVH guests to use a bootloader
Roger Pau Monne libxl: set PVH guests to use the PV console
Roger Pau Monne libxl: add PVH support to domain creation
Roger Pau Monne libxl: remove device model "none" support from disk
related functions
Roger Pau Monne libxl: set device model for PVH guests
Roger Pau Monne libxl: add PVH support to domain building
Roger Pau Monne libxl: add PVH support to domain save/suspend
Roger Pau Monne libxl: add PVH support to vpcu hotplug, domain
destruction/pause and domain configuration
Roger Pau Monne libxl: add PVH support to memory functions
Roger Pau Monne libxl: PVH guests use PV nics
Roger Pau Monne libxl: remove device model "none" support from stream
functions
Roger Pau Monne libxl: add PVH support to USB
Roger Pau Monne libxl: add PVH support to x86 functions
Roger Pau Monne xl: add PVH as a guest type
Roger Pau Monne libxl: remove device model "none" from IDL
George Dunlap   xl: Don't warn on using 'deprecated' mode selection

And here are the patches backported from 4.10 and 4.9 to 4.8 (35 patches
total):

Boris Ostrovsky acpi: make pmtimer optional in FADT
Boris Ostrovsky acpi: power and sleep ACPI buttons are not emulated for
PVH guests
Boris Ostrovsky acpi: PVH guests need _E02 method
Roger Pau Monné libacpi: add _FADT_ to the FADT boot flags definitions
Roger Pau Monné libacpi: set FADT boot flag to notify lack of VGA for
PVHv2 guests
Roger Pau Monné libacpi: don't announce a 8042 controller in the FADT
for PVHv2 guests
Roger Pau Monné libacpi: update FADT layout to support version 5
Roger Pau Monné libacpi: announce that PVHv2 has no CMOS RTC in FADT
Roger Pau Monne firmware/rombios: fix after update to libacpi
Boris Ostrovsky x86/pmtimer: move ACPI registers from PMTState to hvm_domain
Boris Ostrovsky libxl: Update xenstore on VCPU hotplug for all guest types
Roger Pau Monne libxl: add is_default checkers for string and timer_mode
types
Roger Pau Monne libxl: introduce a way to mark fields as deprecated in
the idl
Roger Pau Monne xl: parsing code movement
Roger Pau Monne libxl/xl: use the new location of domain_build_info fields
Roger Pau Monne xl: introduce a domain type option
Roger Pau Monne xl: introduce a firmware option
Juergen Gross   libxl: don't segfault when creating domain with invalid
pvusb device
Roger Pau Monne libxl: introduce a PVH guest type
Roger Pau Monne libxl: allow PVH guests to use a bootloader
Roger Pau Monne libxl: set PVH guests to use the PV console
George Dunlap   libxl: add PVH support to domain creation
Roger Pau Monne libxl: remove device model "none" support from disk
related functions
Roger Pau Monne libxl: set device model for PVH guests
Roger Pau Monne libxl: add PVH support to domain building
Roger Pau Monne libxl: add PVH support to domain save/suspend
Roger Pau Monne libxl: add PVH support to vpcu hotplug, domain
destruction/pause and domain configuration
Roger Pau Monne libxl: add PVH support to memory functions
Roger Pau Monne libxl: PVH guests use PV nics
Roger Pau Monne libxl: remove device model "none" support from stream
functions
Roger Pau Monne libxl: add PVH support to USB
Roger Pau Monne libxl: add PVH support to x86 functions
Roger Pau Monne xl: add PVH as a guest type
Roger Pau Monne libxl: remove device model "none" from IDL
George Dunlap   xl: Don't warn on using 'deprecated' mode selection


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