linux-toradex.git/include/xen/interface, branch v2.6.36.4

xen: Provide a variant of __RING_SIZE() that is an integer constant expression

2011-01-07T21:58:31+00:00

commit 667c78afaec0ac500908e191e8f236e9578d7b1f upstream.

Without this, gcc 4.5 won't compile xen-netfront and xen-blkfront, where
this is being used to specify array sizes.

Signed-off-by: Jan Beulich 
Signed-off-by: Jeremy Fitzhardinge 
Cc: Jens Axboe 
Cc: David Miller 
Signed-off-by: Linus Torvalds 
Signed-off-by: Greg Kroah-Hartman

Merge branch 'stable/xen-swiotlb-0.8.6' of git://git.kernel.org/pub/scm/linux/kernel/git/konrad/xen

2010-08-12T16:09:41+00:00

* 'stable/xen-swiotlb-0.8.6' of git://git.kernel.org/pub/scm/linux/kernel/git/konrad/xen:
  x86: Detect whether we should use Xen SWIOTLB.
  pci-swiotlb-xen: Add glue code to setup dma_ops utilizing xen_swiotlb_* functions.
  swiotlb-xen: SWIOTLB library for Xen PV guest with PCI passthrough.
  xen/mmu: inhibit vmap aliases rather than trying to clear them out
  vmap: add flag to allow lazy unmap to be disabled at runtime
  xen: Add xen_create_contiguous_region
  xen: Rename the balloon lock
  xen: Allow unprivileged Xen domains to create iomap pages
  xen: use _PAGE_IOMAP in ioremap to do machine mappings

Fix up trivial conflicts (adding both xen swiotlb and xen pci platform
driver setup close to each other) in drivers/xen/{Kconfig,Makefile} and
include/xen/xen-ops.h

x86: Call HVMOP_pagetable_dying on exit_mmap.

2010-07-27T06:13:26+00:00

When a pagetable is about to be destroyed, we notify Xen so that the
hypervisor can clear the related shadow pagetable.

Signed-off-by: Stefano Stabellini 
Signed-off-by: Jeremy Fitzhardinge

x86: Use xen_vcpuop_clockevent, xen_clocksource and xen wallclock.

2010-07-27T06:13:25+00:00

Use xen_vcpuop_clockevent instead of hpet and APIC timers as main
clockevent device on all vcpus, use the xen wallclock time as wallclock
instead of rtc and use xen_clocksource as clocksource.
The pv clock algorithm needs to work correctly for the xen_clocksource
and xen wallclock to be usable, only modern Xen versions offer a
reliable pv clock in HVM guests (XENFEAT_hvm_safe_pvclock).

Using the hpet as clocksource means a VMEXIT every time we read/write to
the hpet mmio addresses, pvclock give us a better rating without
VMEXITs. Same goes for the xen wallclock and xen_vcpuop_clockevent

Signed-off-by: Stefano Stabellini 
Signed-off-by: Don Dutile 
Signed-off-by: Jeremy Fitzhardinge

xen: Xen PCI platform device driver.

2010-07-22T23:46:09+00:00

Add the xen pci platform device driver that is responsible
for initializing the grant table and xenbus in PV on HVM mode.
Few changes to xenbus and grant table are necessary to allow the delayed
initialization in HVM mode.
Grant table needs few additional modifications to work in HVM mode.

The Xen PCI platform device raises an irq every time an event has been
delivered to us. However these interrupts are only delivered to vcpu 0.
The Xen PCI platform interrupt handler calls xen_hvm_evtchn_do_upcall
that is a little wrapper around __xen_evtchn_do_upcall, the traditional
Xen upcall handler, the very same used with traditional PV guests.

When running on HVM the event channel upcall is never called while in
progress because it is a normal Linux irq handler (and we cannot switch
the irq chip wholesale to the Xen PV ones as we are running QEMU and
might have passed in PCI devices), therefore we cannot be sure that
evtchn_upcall_pending is 0 when returning.
For this reason if evtchn_upcall_pending is set by Xen we need to loop
again on the event channels set pending otherwise we might loose some
event channel deliveries.

Signed-off-by: Stefano Stabellini 
Signed-off-by: Sheng Yang 
Signed-off-by: Jeremy Fitzhardinge

x86/xen: event channels delivery on HVM.

2010-07-22T23:45:59+00:00

Set the callback to receive evtchns from Xen, using the
callback vector delivery mechanism.

The traditional way for receiving event channel notifications from Xen
is via the interrupts from the platform PCI device.
The callback vector is a newer alternative that allow us to receive
notifications on any vcpu and doesn't need any PCI support: we allocate
a vector exclusively to receive events, in the vector handler we don't
need to interact with the vlapic, therefore we avoid a VMEXIT.

Signed-off-by: Stefano Stabellini 
Signed-off-by: Sheng Yang 
Signed-off-by: Jeremy Fitzhardinge

xen: Add support for HVM hypercalls.

2010-07-22T23:45:31+00:00

Signed-off-by: Jeremy Fitzhardinge 
Signed-off-by: Sheng Yang 
Signed-off-by: Stefano Stabellini

xen: Add xen_create_contiguous_region

2010-06-07T19:37:53+00:00

A memory region must be physically contiguous in order to be accessed
through DMA.  This patch adds xen_create_contiguous_region, which
ensures a region of contiguous virtual memory is also physically
contiguous.

Based on Stephen Tweedie's port of the 2.6.18-xen version.

Remove contiguous_bitmap[] as it's no longer needed.

Ported from linux-2.6.18-xen.hg 707:e410857fd83c

[ Impact: add Xen-internal API to make pages phys-contig ]

Signed-off-by: Alex Nixon 
Signed-off-by: Jeremy Fitzhardinge 
Signed-off-by: Ian Campbell 
Signed-off-by: Konrad Rzeszutek Wilk

xen: Rename the balloon lock

2010-06-07T18:34:07+00:00

* xen_create_contiguous_region needs access to the balloon lock to
  ensure memory doesn't change under its feet, so expose the balloon
  lock
* Change the name of the lock to xen_reservation_lock, to imply it's
  now less-specific usage.

[ Impact: cleanup ]

Signed-off-by: Alex Nixon 
Signed-off-by: Jeremy Fitzhardinge 
Signed-off-by: Konrad Rzeszutek Wilk

xen: add /sys/hypervisor support

2009-03-30T16:27:06+00:00

Adds support for Xen info under /sys/hypervisor.  Taken from Novell 2.6.27
backport tree.

Signed-off-by: Jeremy Fitzhardinge