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* xen: change xen/[gntdev/gntalloc] to default mStefano Stabellini2011-02-161-0/+2
| | | | | | | | | | When CONFIG_XEN is enabled the gntdev and gntalloc driver will be compiled as a module by default. [v2: Added the fix for the gntalloc driver as well] Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com> Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
* xen-gntalloc: Userspace grant allocation driverDaniel De Graaf2011-02-141-0/+8
| | | | | | | | | | This allows a userspace application to allocate a shared page for implementing inter-domain communication or device drivers. These shared pages can be mapped using the gntdev device or by the kernel in another domain. Signed-off-by: Daniel De Graaf <dgdegra@tycho.nsa.gov> Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
* Merge branch 'stable/gntdev' of ↵Linus Torvalds2011-01-131-1/+8
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/konrad/xen * 'stable/gntdev' of git://git.kernel.org/pub/scm/linux/kernel/git/konrad/xen: xen/p2m: Fix module linking error. xen p2m: clear the old pte when adding a page to m2p_override xen gntdev: use gnttab_map_refs and gnttab_unmap_refs xen: introduce gnttab_map_refs and gnttab_unmap_refs xen p2m: transparently change the p2m mappings in the m2p override xen/gntdev: Fix circular locking dependency xen/gntdev: stop using "token" argument xen: gntdev: move use of GNTMAP_contains_pte next to the map_op xen: add m2p override mechanism xen: move p2m handling to separate file xen/gntdev: add VM_PFNMAP to vma xen/gntdev: allow usermode to map granted pages xen: define gnttab_set_map_op/unmap_op Fix up trivial conflict in drivers/xen/Kconfig
| * xen/gntdev: allow usermode to map granted pagesGerd Hoffmann2011-01-111-0/+7
| | | | | | | | | | | | | | | | | | | | | | The gntdev driver allows usermode to map granted pages from other domains. This is typically used to implement a Xen backend driver in user mode. Signed-off-by: Gerd Hoffmann <kraxel@redhat.com> Signed-off-by: Stefano Stabellini <Stefano.Stabellini@eu.citrix.com> Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com> Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
* | Merge branch 'stable/platform-pci-fixes' of ↵Linus Torvalds2011-01-131-1/+1
|\ \ | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/konrad/xen * 'stable/platform-pci-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/konrad/xen: xen-platform: Fix compile errors if CONFIG_PCI is not enabled. xen: rename platform-pci module to xen-platform-pci. xen-platform: use PCI interfaces to request IO and MEM resources.
| * | xen-platform: Fix compile errors if CONFIG_PCI is not enabled.Konrad Rzeszutek Wilk2011-01-121-1/+1
| |/ | | | | | | | | | | | | | | | | drivers/xen/platform-pci.c:127: error: implicit declaration of function 'pci_request_region' drivers/xen/platform-pci.c:165: error: implicit declaration of function 'pci_release_region' Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
* | xen/xenbus: making backend support modular is too complexJeremy Fitzhardinge2011-01-051-1/+1
| | | | | | | | | | | | | | | | | | | | Impact: build fix Making the xenbus backend support a separate module is needlessly complex and causes build failures. Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com> Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
* | xen/xenbus: fixup checkpatch issues in xenbus_probe*Ian Campbell2011-01-051-1/+1
| | | | | | | | | | Signed-off-by: Ian Campbell <ian.campbell@citrix.com> Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
* | xen: add backend driver supportIan Campbell2011-01-051-0/+8
| | | | | | | | | | | | | | | | | | | | | | Impact: backend device support Add the basic machinery to support backend drivers. Signed-off-by: Ian Campbell <ian.campbell@citrix.com> Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com> [corresponds to 79727b851bac in git://git.kernel.org/pub/scm/linux/kernel/git/jeremy/xen.git] Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
* | xen: separate out frontend xenbusIan Campbell2011-01-051-0/+3
|/ | | | | | | | | | | | Impact: refactor Make a distinct frontend xenbus, in preparation for adding a backend xenbus. Signed-off-by: Ian Campbell <ian.campbell@citrix.com> Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com> [corresponds to 2fd433a4188f in git://git.kernel.org/pub/scm/linux/kernel/git/jeremy/xen.git with adjustments to reflect changes in the code which is moved] Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
* swiotlb-xen: On x86-32 builts, select SWIOTLB instead of depending on it.Konrad Rzeszutek Wilk2010-10-181-1/+2
| | | | | | | | | | | | | We used to depend on CONFIG_SWIOTLB, but that is disabled by default. So when compiling we get this compile error: arch/x86/xen/pci-swiotlb-xen.c: In function 'pci_xen_swiotlb_detect': arch/x86/xen/pci-swiotlb-xen.c:48: error: lvalue required as left operand of assignment Fix it by actually activating the SWIOTLB library. Reported-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com> Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
* xen/pci: Request ACS when Xen-SWIOTLB is activated.Konrad Rzeszutek Wilk2010-10-181-1/+1
| | | | | | | | It used to done in the Xen startup code but that is not really appropiate. [v2: Update Kconfig with PCI requirement] Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
* Merge branch 'stable/xen-swiotlb-0.8.6' of ↵Linus Torvalds2010-08-121-0/+5
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/konrad/xen * '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
| * swiotlb-xen: SWIOTLB library for Xen PV guest with PCI passthrough.Konrad Rzeszutek Wilk2010-07-271-0/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patchset: PV guests under Xen are running in an non-contiguous memory architecture. When PCI pass-through is utilized, this necessitates an IOMMU for translating bus (DMA) to virtual and vice-versa and also providing a mechanism to have contiguous pages for device drivers operations (say DMA operations). Specifically, under Xen the Linux idea of pages is an illusion. It assumes that pages start at zero and go up to the available memory. To help with that, the Linux Xen MMU provides a lookup mechanism to translate the page frame numbers (PFN) to machine frame numbers (MFN) and vice-versa. The MFN are the "real" frame numbers. Furthermore memory is not contiguous. Xen hypervisor stitches memory for guests from different pools, which means there is no guarantee that PFN==MFN and PFN+1==MFN+1. Lastly with Xen 4.0, pages (in debug mode) are allocated in descending order (high to low), meaning the guest might never get any MFN's under the 4GB mark. Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> Acked-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com> Cc: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> Cc: Albert Herranz <albert_herranz@yahoo.es> Cc: Ian Campbell <Ian.Campbell@citrix.com>
* | Introduce CONFIG_XEN_PVHVM compile optionStefano Stabellini2010-07-291-1/+1
| | | | | | | | | | | | | | This patch introduce a CONFIG_XEN_PVHVM compile time option to enable/disable Xen PV on HVM support. Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
* | xen: Xen PCI platform device driver.Stefano Stabellini2010-07-221-0/+9
|/ | | | | | | | | | | | | | | | | | | | | | | | | | | 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 <stefano.stabellini@eu.citrix.com> Signed-off-by: Sheng Yang <sheng@linux.intel.com> Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
* xen: add kconfig menuRandy Dunlap2010-03-061-5/+7
| | | | | | | | | | | | | Currently the xen support drivers are displayed in the main Device Drivers menu of the config tools instead of in their own sub-menu, so move them to their own sub-menu, like the rest of the driver world uses. This keeps the main Device Drivers menu from becoming messy. Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com> Cc: Jeremy Fitzhardinge <jeremy@xensource.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* Merge commit 'origin/master' into for-linus/xen/masterJeremy Fitzhardinge2009-04-071-1/+1
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * commit 'origin/master': (4825 commits) Fix build errors due to CONFIG_BRANCH_TRACER=y parport: Use the PCI IRQ if offered tty: jsm cleanups Adjust path to gpio headers KGDB_SERIAL_CONSOLE check for module Change KCONFIG name tty: Blackin CTS/RTS Change hardware flow control from poll to interrupt driven Add support for the MAX3100 SPI UART. lanana: assign a device name and numbering for MAX3100 serqt: initial clean up pass for tty side tty: Use the generic RS485 ioctl on CRIS tty: Correct inline types for tty_driver_kref_get() splice: fix deadlock in splicing to file nilfs2: support nanosecond timestamp nilfs2: introduce secondary super block nilfs2: simplify handling of active state of segments nilfs2: mark minor flag for checkpoint created by internal operation nilfs2: clean up sketch file nilfs2: super block operations fix endian bug ... Conflicts: arch/x86/include/asm/thread_info.h arch/x86/lguest/boot.c drivers/xen/manage.c
| * trivial: fix typos/grammar errors in Kconfig textsMatt LaPlante2009-03-301-1/+1
| | | | | | | | | | | | Signed-off-by: Matt LaPlante <kernel1@cyberdogtech.com> Acked-by: Randy Dunlap <randy.dunlap@oracle.com> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
| |
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*-. \ Merge branches 'for-linus/xen/dev-evtchn', 'for-linus/xen/xenbus', ↵Jeremy Fitzhardinge2009-03-301-0/+20
|\ \ \ | |_|/ |/| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 'for-linus/xen/xenfs' and 'for-linus/xen/sys-hypervisor' into for-linus/xen/master * for-linus/xen/dev-evtchn: xen/dev-evtchn: clean up locking in evtchn xen: export ioctl headers to userspace xen: add /dev/xen/evtchn driver xen: add irq_from_evtchn * for-linus/xen/xenbus: xen/xenbus: export xenbus_dev_changed xen: use device model for suspending xenbus devices xen: remove suspend_cancel hook * for-linus/xen/xenfs: xen: add "capabilities" file * for-linus/xen/sys-hypervisor: xen: drop kexec bits from /sys/hypervisor since kexec isn't implemented yet xen/sys/hypervisor: change writable_pt to features xen: add /sys/hypervisor support Conflicts: drivers/xen/Makefile
| | * xen: add /sys/hypervisor supportJeremy Fitzhardinge2009-03-301-0/+10
| |/ |/| | | | | | | | | | | Adds support for Xen info under /sys/hypervisor. Taken from Novell 2.6.27 backport tree. Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
| * xen: add /dev/xen/evtchn driverIan Campbell2009-03-301-0/+10
|/ | | | | | | | | | This driver is used by application which wish to receive notifications from the hypervisor or other guests via Xen's event channel mechanism. In particular it is used by the xenstore daemon in domain 0. Signed-off-by: Ian Campbell <ian.campbell@citrix.com> Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
* xen: add xenfs to allow usermode <-> Xen interactionAlex Zeffertt2009-01-081-0/+24
| | | | | | | | | | | | | | | The xenfs filesystem exports various interfaces to usermode. Initially this exports a file to allow usermode to interact with xenbus/xenstore. Traditionally this appeared in /proc/xen. Rather than extending procfs, this patch adds a backward-compat mountpoint on /proc/xen, and provides a xenfs filesystem which can be mounted there. Signed-off-by: Alex Zeffertt <alex.zeffertt@eu.citrix.com> Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com> Cc: Ingo Molnar <mingo@elte.hu> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* xen: add balloon driverJeremy Fitzhardinge2008-04-241-0/+19
The balloon driver allows memory to be dynamically added or removed from the domain, in order to allow host memory to be balanced between multiple domains. This patch introduces the Xen balloon driver, though it currently only allows a domain to be shrunk from its initial size (and re-grown back to that size). A later patch will add the ability to grow a domain beyond its initial size. Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
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