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* VFS: Fix the nfs sillyrename regression in kernel 2.6.38Trond Myklebust2011-03-151-1/+6
| | | | | | | | | | | | | | | | | | | | | | The new vfs locking scheme introduced in 2.6.38 breaks NFS sillyrename because the latter relies on being able to determine the parent directory of the dentry in the ->iput() callback in order to send the appropriate unlink rpc call. Looking at the code that cares about races with dput(), there doesn't seem to be anything that specifically uses d_parent as a test for whether or not there is a race: - __d_lookup_rcu(), __d_lookup() all test for d_hashed() after d_parent - shrink_dcache_for_umount() is safe since nothing else can rearrange the dentries in that super block. - have_submount(), select_parent() and d_genocide() can test for a deletion if we set the DCACHE_DISCONNECTED flag when the dentry is removed from the parent's d_subdirs list. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com> Cc: stable@kernel.org (2.6.38, needs commit c826cb7dfce8 "dcache.c: create helper function for duplicated functionality" ) Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* dcache.c: create helper function for duplicated functionalityLinus Torvalds2011-03-151-51/+37
| | | | | | | | | This creates a helper function for he "try to ascend into the parent directory" case, which was written out in triplicate before. With all the locking and subtle sequence number stuff, we really don't want to duplicate that kind of code. Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* Merge branch 'for-linus' of git://xenbits.xen.org/people/sstabellini/linux-pvhvmLinus Torvalds2011-03-1513-101/+257
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * 'for-linus' of git://xenbits.xen.org/people/sstabellini/linux-pvhvm: xen: suspend: remove xen_hvm_suspend xen: suspend: pull pre/post suspend hooks out into suspend_info xen: suspend: move arch specific pre/post suspend hooks into generic hooks xen: suspend: refactor non-arch specific pre/post suspend hooks xen: suspend: add "arch" to pre/post suspend hooks xen: suspend: pass extra hypercall argument via suspend_info struct xen: suspend: refactor cancellation flag into a structure xen: suspend: use HYPERVISOR_suspend for PVHVM case instead of open coding xen: switch to new schedop hypercall by default. xen: use new schedop interface for suspend xen: do not respond to unknown xenstore control requests xen: fix compile issue if XEN is enabled but XEN_PVHVM is disabled xen: PV on HVM: support PV spinlocks and IPIs xen: make the ballon driver work for hvm domains xen-blkfront: handle Xen major numbers other than XENVBD xen: do not use xen_info on HVM, set pv_info name to "Xen HVM" xen: no need to delay xen_setup_shutdown_event for hvm guests anymore
| * xen: suspend: remove xen_hvm_suspendIan Campbell2011-02-251-42/+1
| | | | | | | | | | | | | | | | It is now identical to xen_suspend, the differences are encapsulated in the suspend_info struct. Signed-off-by: Ian Campbell <ian.campbell@citrix.com> Reviewed-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
| * xen: suspend: pull pre/post suspend hooks out into suspend_infoIan Campbell2011-02-251-5/+18
| | | | | | | | | | Signed-off-by: Ian Campbell <ian.campbell@citrix.com> Reviewed-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
| * xen: suspend: move arch specific pre/post suspend hooks into generic hooksIan Campbell2011-02-251-7/+7
| | | | | | | | | | Signed-off-by: Ian Campbell <ian.campbell@citrix.com> Reviewed-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
| * xen: suspend: refactor non-arch specific pre/post suspend hooksIan Campbell2011-02-251-5/+20
| | | | | | | | | | Signed-off-by: Ian Campbell <ian.campbell@citrix.com> Reviewed-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
| * xen: suspend: add "arch" to pre/post suspend hooksIan Campbell2011-02-254-16/+11
| | | | | | | | | | | | | | xen_pre_device_suspend is unused on ia64. Signed-off-by: Ian Campbell <ian.campbell@citrix.com> Reviewed-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
| * xen: suspend: pass extra hypercall argument via suspend_info structIan Campbell2011-02-251-2/+8
| | | | | | | | | | Signed-off-by: Ian Campbell <ian.campbell@citrix.com> Reviewed-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
| * xen: suspend: refactor cancellation flag into a structureIan Campbell2011-02-251-13/+19
| | | | | | | | | | | | | | Will add extra fields in subsequent patches. Signed-off-by: Ian Campbell <ian.campbell@citrix.com> Reviewed-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
| * xen: suspend: use HYPERVISOR_suspend for PVHVM case instead of open codingIan Campbell2011-02-251-2/+6
| | | | | | | | | | Signed-off-by: Ian Campbell <ian.campbell@citrix.com> Reviewed-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
| * xen: switch to new schedop hypercall by default.Ian Campbell2011-02-252-4/+4
| | | | | | | | | | | | | | | | Rename old interface to sched_op_compat and rename sched_op_new to simply sched_op. Signed-off-by: Ian Campbell <ian.campbell@citrix.com> Reviewed-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
| * xen: use new schedop interface for suspendIan Campbell2011-02-251-3/+10
| | | | | | | | | | | | | | | | Take the opportunity to comment on the semantics of the PV guest suspend hypercall arguments. Signed-off-by: Ian Campbell <ian.campbell@citrix.com> Reviewed-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
| * xen: do not respond to unknown xenstore control requestsIan Campbell2011-02-251-12/+37
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The PV xenbus control/shutdown node is written by the toolstack as a request to the guest to perform a particular action (shutdown, reboot, suspend etc). The guest is expected to acknowledge that it will complete a request by clearing the control node. Previously it would acknowledge any request, even if it did not know what to do with it. Specifically in the case where CONFIG_PM_SLEEP is not enabled the kernel would acknowledge a suspend request even though it was not actually going to do anything. Instead make the kernel only acknowledge requests if it is actually going to do something with it. This will improve the toolstack's ability to diagnose and deal with failures. Signed-off-by: Ian Campbell <ian.campbell@citrix.com> Reviewed-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
| * xen: fix compile issue if XEN is enabled but XEN_PVHVM is disabledStefano Stabellini2011-02-251-0/+2
| | | | | | | | Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
| * xen: PV on HVM: support PV spinlocks and IPIsStefano Stabellini2011-02-253-0/+43
| | | | | | | | | | | | | | | | | | | | | | Initialize PV spinlocks on boot CPU right after native_smp_prepare_cpus (that switch to APIC mode and initialize APIC routing); on secondary CPUs on CPU_UP_PREPARE. Enable the usage of event channels to send and receive IPIs when running as a PV on HVM guest. Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
| * xen: make the ballon driver work for hvm domainsStefano Stabellini2011-02-251-5/+9
| | | | | | | | Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
| * xen-blkfront: handle Xen major numbers other than XENVBDStefano Stabellini2011-02-252-5/+95
| | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch makes sure blkfront handles correctly virtual device numbers corresponding to Xen emulated IDE and SCSI disks: in those cases blkfront translates the major number to XENVBD and the minor number to a low xvd minor. Note: this behaviour is different from what old xenlinux PV guests used to do: they used to steal an IDE or SCSI major number and use it instead. Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com> Acked-by: Jeremy Fitzhardinge <jeremy@goop.org>
| * xen: do not use xen_info on HVM, set pv_info name to "Xen HVM"Stefano Stabellini2011-02-251-2/+1
| | | | | | | | | | Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com> Acked-by: Jeremy Fitzhardinge <jeremy@goop.org>
| * xen: no need to delay xen_setup_shutdown_event for hvm guests anymoreStefano Stabellini2011-02-252-16/+4
| | | | | | | | | | | | | | | | | | Now that xenstore_ready is used correctly for PV on HVM guests too, we don't need to delay the initialization of xen_setup_shutdown_event anymore. Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com> Acked-by: Jeremy Fitzhardinge <jeremy@goop.org>
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*---. \ Merge branches 'stable/ia64', 'stable/blkfront-cleanup' and 'stable/cleanup' ↵Linus Torvalds2011-03-156-15/+21
|\ \ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | of git://git.kernel.org/pub/scm/linux/kernel/git/konrad/xen * 'stable/ia64' of git://git.kernel.org/pub/scm/linux/kernel/git/konrad/xen: xen: ia64 build broken due to "xen: switch to new schedop hypercall by default." * 'stable/blkfront-cleanup' of git://git.kernel.org/pub/scm/linux/kernel/git/konrad/xen: xen: Union the blkif_request request specific fields * 'stable/cleanup' of git://git.kernel.org/pub/scm/linux/kernel/git/konrad/xen: xen: annotate functions which only call into __init at start of day xen p2m: annotate variable which appears unused xen: events: mark cpu_evtchn_mask_p as __refdata
| | | * | xen: annotate functions which only call into __init at start of dayIan Campbell2011-02-112-2/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Both xen_hvm_init_shared_info and xen_build_mfn_list_list can be called at resume time as well as at start of day but only reference __init functions (extend_brk) at start of day. Hence annotate with __ref. WARNING: arch/x86/built-in.o(.text+0x4f1): Section mismatch in reference from the function xen_hvm_init_shared_info() to the function .init.text:extend_brk() The function xen_hvm_init_shared_info() references the function __init extend_brk(). This is often because xen_hvm_init_shared_info lacks a __init annotation or the annotation of extend_brk is wrong. xen_hvm_init_shared_info calls extend_brk() iff !shared_info_page and initialises shared_info_page with the result. This happens at start of day only. WARNING: arch/x86/built-in.o(.text+0x599b): Section mismatch in reference from the function xen_build_mfn_list_list() to the function .init.text:extend_brk() The function xen_build_mfn_list_list() references the function __init extend_brk(). This is often because xen_build_mfn_list_list lacks a __init annotation or the annotation of extend_brk is wrong. (this warning occurs multiple times) xen_build_mfn_list_list only calls extend_brk() at boot time, while building the initial mfn list list Signed-off-by: Ian Campbell <ian.campbell@citrix.com> Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
| | | * | xen p2m: annotate variable which appears unusedIan Campbell2011-02-111-2/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | CC arch/x86/xen/p2m.o arch/x86/xen/p2m.c: In function 'm2p_remove_override': arch/x86/xen/p2m.c:460: warning: 'address' may be used uninitialized in this function arch/x86/xen/p2m.c: In function 'm2p_add_override': arch/x86/xen/p2m.c:426: warning: 'address' may be used uninitialized in this function In actual fact address is inialised in one "if (!PageHighMem(page))" statement and used in a second and so is always initialised before use. Signed-off-by: Ian Campbell <ian.campbell@citrix.com> Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
| | | * | xen: events: mark cpu_evtchn_mask_p as __refdataIan Campbell2011-02-111-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This variable starts out pointing at init_evtchn_mask which is marked __initdata but is set to point to a non-init data region in xen_init_IRQ which is itself an __init function so this is safe. Signed-off-by: Ian Campbell <ian.campbell@citrix.com> Tested-and-acked-by: Andrew Jones <drjones@redhat.com> Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
| | * | | xen: Union the blkif_request request specific fieldsOwen Smith2011-03-082-9/+15
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Prepare for extending the block device ring to allow request specific fields, by moving the request specific fields for reads, writes and barrier requests to a union member. Acked-by: Jens Axboe <jaxboe@fusionio.com> Signed-off-by: Owen Smith <owen.smith@citrix.com> Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
| * | | | xen: ia64 build broken due to "xen: switch to new schedop hypercall by default."Ian Campbell2011-03-021-1/+1
| | |_|/ | |/| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The git commit: > commit a8b7458363b9174f3c2196ca6085630b4b30b7a1 > Author: Ian Campbell <ian.campbell@citrix.com> > Date: Thu Feb 17 11:04:20 2011 +0000 > > xen: switch to new schedop hypercall by default. > > Rename old interface to sched_op_compat and rename sched_op_new to > simply sched_op. > breaks the IA64 build. This patch fixes it. Signed-off-by: Tony Luck <tony.luck@intel.com> Signed-off-by: Ian Campbell <Ian.Campbell@eu.citrix.com> Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
* | | | Merge branch 'stable/irq.cleanup' of ↵Linus Torvalds2011-03-153-143/+91
|\ \ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/konrad/xen * 'stable/irq.cleanup' of git://git.kernel.org/pub/scm/linux/kernel/git/konrad/xen: xen: events: remove dom0 specific xen_create_msi_irq xen: events: use xen_bind_pirq_msi_to_irq from xen_create_msi_irq xen: events: push set_irq_msi down into xen_create_msi_irq xen: events: update pirq_to_irq in xen_create_msi_irq xen: events: refactor xen_create_msi_irq slightly xen: events: separate MSI PIRQ allocation from PIRQ binding to IRQ xen: events: assume PHYSDEVOP_get_free_pirq exists xen: pci: collapse apic_register_gsi_xen_hvm and xen_hvm_register_pirq xen: events: return irq from xen_allocate_pirq_msi xen: events: drop XEN_ALLOC_IRQ flag to xen_allocate_pirq_msi xen: events: do not leak IRQ from xen_allocate_pirq_msi when no pirq available. xen: pci: only define xen_initdom_setup_msi_irqs if CONFIG_XEN_DOM0
| * | | | xen: events: remove dom0 specific xen_create_msi_irqIan Campbell2011-03-103-47/+40
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The function name does not distinguish it from xen_allocate_pirq_msi (which operates on domU and pvhvm domains rather than dom0). Hoist domain 0 specific functionality up into the only caller leaving functionality common to all guest types in xen_bind_pirq_msi_to_irq. Signed-off-by: Ian Campbell <ian.campbell@citrix.com> Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
| * | | | xen: events: use xen_bind_pirq_msi_to_irq from xen_create_msi_irqIan Campbell2011-03-103-32/+10
| | | | | | | | | | | | | | | | | | | | | | | | | Signed-off-by: Ian Campbell <ian.campbell@citrix.com> Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
| * | | | xen: events: push set_irq_msi down into xen_create_msi_irqIan Campbell2011-03-102-10/+10
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Makes the tail end of this function look even more like xen_bind_pirq_msi_to_irq. Signed-off-by: Ian Campbell <ian.campbell@citrix.com> Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
| * | | | xen: events: update pirq_to_irq in xen_create_msi_irqIan Campbell2011-03-101-0/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | I don't think this was a deliberate ommision. Makes the tail end of this function look even more like xen_bind_pirq_msi_to_irq. Signed-off-by: Ian Campbell <ian.campbell@citrix.com> Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
| * | | | xen: events: refactor xen_create_msi_irq slightlyIan Campbell2011-03-101-9/+6
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Calling PHYSDEVOP_map_pirq earlier simplifies error handling and starts to make the tail end of this function look like xen_bind_pirq_msi_to_irq. Signed-off-by: Ian Campbell <ian.campbell@citrix.com> Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
| * | | | xen: events: separate MSI PIRQ allocation from PIRQ binding to IRQIan Campbell2011-03-103-59/+43
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Split the binding aspect of xen_allocate_pirq_msi out into a new xen_bind_pirq_to_irq function. In xen_hvm_setup_msi_irq when allocating a pirq write the MSI message to signal the PIRQ as soon as the pirq is obtained. There is no way to free the pirq back so if the subsequent binding to an IRQ fails we want to ensure that we will reuse the PIRQ next time rather than leak it. Signed-off-by: Ian Campbell <ian.campbell@citrix.com> Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
| * | | | xen: events: assume PHYSDEVOP_get_free_pirq existsIan Campbell2011-03-101-9/+6
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The find_unbound_pirq is called only from xen_allocate_pirq_msi and only if alloc_pirq is true. The only caller which does this is xen_hvm_setup_msi_irqs. The use of this function is gated, in pci_xen_hvm_init, on XENFEAT_hvm_pirqs. The PHYSDEVOP_get_free_pirq interfaces was added to the hypervisor in 22410:be96f6058c05 while XENFEAT_hvm_pirqs was added a couple of minutes prior in 22409:6663214f06ac. Therefore we do not need to concern ourselves with hypervisors which support XENFEAT_hvm_pirqs but not PHYSDEVOP_get_free_pirq. This eliminates the fallback path in find_unbound_pirq which walks to pirq_to_irq array looking for a free pirq. Unlike the PHYSDEVOP_get_free_pirq interface this fallback only looks up a free pirq but does not reserve it. Removing this fallback will simplify locking in the future. Signed-off-by: Ian Campbell <ian.campbell@citrix.com> Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
| * | | | xen: pci: collapse apic_register_gsi_xen_hvm and xen_hvm_register_pirqIan Campbell2011-03-101-8/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | apic_register_gsi_xen_hvm is a tiny wrapper around xen_hvm_register_pirq. Signed-off-by: Ian Campbell <ian.campbell@citrix.com> Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
| * | | | xen: events: return irq from xen_allocate_pirq_msiIan Campbell2011-03-103-15/+18
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | consistent with other similar functions. Signed-off-by: Ian Campbell <ian.campbell@citrix.com> Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
| * | | | xen: events: drop XEN_ALLOC_IRQ flag to xen_allocate_pirq_msiIan Campbell2011-03-103-14/+9
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | All callers pass this flag so it is pointless. Signed-off-by: Ian Campbell <ian.campbell@citrix.com> Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
| * | | | xen: events: do not leak IRQ from xen_allocate_pirq_msi when no pirq available.Ian Campbell2011-03-101-1/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Cc: Jeremy Fitzhardinge <jeremy@goop.org> Cc: xen-devel@lists.xensource.com Signed-off-by: Ian Campbell <ian.campbell@citrix.com> Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
| * | | | xen: pci: only define xen_initdom_setup_msi_irqs if CONFIG_XEN_DOM0Ian Campbell2011-03-101-0/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Fixes: CC arch/x86/pci/xen.o arch/x86/pci/xen.c:183: warning: 'xen_initdom_setup_msi_irqs' defined but not used Signed-off-by: Ian Campbell <ian.campbell@citrix.com> Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
| * | | | Merge branch 'stable/pcifront-fixes' into stable/irq.cleanupKonrad Rzeszutek Wilk2011-03-103-19/+33
| |\ \ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * stable/pcifront-fixes: pci/xen: When free-ing MSI-X/MSI irq->desc also use generic code. pci/xen: Cleanup: convert int** to int[] pci/xen: Use xen_allocate_pirq_msi instead of xen_allocate_pirq xen-pcifront: Sanity check the MSI/MSI-X values xen-pcifront: don't use flush_scheduled_work()
| * \ \ \ \ Merge branch 'stable/irq.rework' into stable/irq.cleanupKonrad Rzeszutek Wilk2011-03-106-168/+153
| |\ \ \ \ \ | | |_|/ / / | |/| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * stable/irq.rework: xen/irq: Cleanup up the pirq_to_irq for DomU PV PCI passthrough guests as well. xen: Use IRQF_FORCE_RESUME xen/timer: Missing IRQF_NO_SUSPEND in timer code broke suspend. xen: Fix compile error introduced by "switch to new irq_chip functions" xen: Switch to new irq_chip functions xen: Remove stale irq_chip.end xen: events: do not free legacy IRQs xen: events: allocate GSIs and dynamic IRQs from separate IRQ ranges. xen: events: add xen_allocate_irq_{dynamic, gsi} and xen_free_irq xen:events: move find_unbound_irq inside CONFIG_PCI_MSI xen: handled remapped IRQs when enabling a pcifront PCI device. genirq: Add IRQF_FORCE_RESUME
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*-. \ \ \ \ \ Merge branches 'stable/irq.rework' and 'stable/pcifront-fixes' of ↵Linus Torvalds2011-03-158-187/+186
|\ \ \ \ \ \ \ | | |_|/ / / / | |/| | / / / | | | |/ / / | | |/| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/konrad/xen * 'stable/irq.rework' of git://git.kernel.org/pub/scm/linux/kernel/git/konrad/xen: xen/irq: Cleanup up the pirq_to_irq for DomU PV PCI passthrough guests as well. xen: Use IRQF_FORCE_RESUME xen/timer: Missing IRQF_NO_SUSPEND in timer code broke suspend. xen: Fix compile error introduced by "switch to new irq_chip functions" xen: Switch to new irq_chip functions xen: Remove stale irq_chip.end xen: events: do not free legacy IRQs xen: events: allocate GSIs and dynamic IRQs from separate IRQ ranges. xen: events: add xen_allocate_irq_{dynamic, gsi} and xen_free_irq xen:events: move find_unbound_irq inside CONFIG_PCI_MSI xen: handled remapped IRQs when enabling a pcifront PCI device. genirq: Add IRQF_FORCE_RESUME * 'stable/pcifront-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/konrad/xen: pci/xen: When free-ing MSI-X/MSI irq->desc also use generic code. pci/xen: Cleanup: convert int** to int[] pci/xen: Use xen_allocate_pirq_msi instead of xen_allocate_pirq xen-pcifront: Sanity check the MSI/MSI-X values xen-pcifront: don't use flush_scheduled_work()
| | * | | | pci/xen: When free-ing MSI-X/MSI irq->desc also use generic code.Konrad Rzeszutek Wilk2011-02-181-0/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This code path is only run when an MSI/MSI-X PCI device is passed in to PV DomU. In 2.6.37 time-frame we over-wrote the default cleanup handler for MSI/MSI-X irq->desc to be "xen_teardown_msi_irqs". That function calls the the xen-pcifront driver which can tell the backend to cleanup/take back the MSI/MSI-X device. However, we forgot to continue the process of free-ing the MSI/MSI-X device resources (irq->desc) in the PV domU side. Which is what the default cleanup handler: default_teardown_msi_irqs did. Hence we would leak IRQ descriptors. Without this patch, doing "rmmod igbvf;modprobe igbvf" multiple times ends with abandoned IRQ descriptors: 28: 5 xen-pirq-pcifront-msi-x 29: 8 xen-pirq-pcifront-msi-x ... 130: 10 xen-pirq-pcifront-msi-x with the end result of running out of IRQ descriptors. Reviewed-by: Ian Campbell <Ian.Campbell@citrix.com> Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
| | * | | | pci/xen: Cleanup: convert int** to int[]Konrad Rzeszutek Wilk2011-02-183-12/+12
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Cleanup code. Cosmetic change to make the code look easier to read. Reviewed-by: Ian Campbell <Ian.Campbell@citrix.com> Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
| | * | | | pci/xen: Use xen_allocate_pirq_msi instead of xen_allocate_pirqKonrad Rzeszutek Wilk2011-02-181-3/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | xen_allocate_pirq -> xen_map_pirq_gsi -> PHYSDEVOP_alloc_irq_vector IFF xen_initial_domain() in addition to the kernel side book-keeping side of things (set chip and handler, update irq_info etc) whereas xen_allocate_pirq_msi just does the kernel book keeping. Also xen_allocate_pirq allocates an IRQ in the 1-1 GSI space whereas xen_allocate_pirq_msi allocates a dynamic one in the >GSI IRQ space. All of this is uneccessary as this code path is only executed when we run as a domU PV guest with an MSI/MSI-X PCI card passed in. Hence we can jump straight to allocating an dynamic IRQ (and binding it to the proper PIRQ) and skip the rest. In short: this change is a cosmetic one. Reviewed-by: Ian Campbell <Ian.Campbell@citrix.com> Reviewed-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com> Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
| | * | | | xen-pcifront: Sanity check the MSI/MSI-X valuesKonrad Rzeszutek Wilk2011-02-181-4/+16
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Check the returned vector values for any values that are odd or plain incorrect (say vector value zero), and if so print a warning. Also fixup the return values. This patch was precipiated by the Xen PCIBack returning the incorrect values due to how it was retrieving PIRQ values. This has been fixed in the xen-pciback by "xen/pciback: Utilize 'xen_pirq_from_irq' to get PIRQ value" patch. Reviewed-by: Ian Campbell <Ian.Campbell@citrix.com> Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
| | * | | | xen-pcifront: don't use flush_scheduled_work()Tejun Heo2011-02-171-2/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | flush_scheduled_work() is scheduled for deprecation. Cancel ->op_work directly instead. Signed-off-by: Tejun Heo <tj@kernel.org> Cc: Ryan Wilson <hap9@epoch.ncsc.mil> Cc: Jan Beulich <JBeulich@novell.com> Cc: Jesse Barnes <jbarnes@virtuousgeek.org> Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
| * | | | | xen/irq: Cleanup up the pirq_to_irq for DomU PV PCI passthrough guests as well.Konrad Rzeszutek Wilk2011-03-031-1/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | We only did this for PV guests that are xen_initial_domain() but there is not reason not to do this for other cases. The other case is only exercised when you pass in a PCI device to a PV guest _and_ the device in question. Reviewed-by: Ian Campbell <ian.campbell@citrix.com> Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
| * | | | | xen: Use IRQF_FORCE_RESUMEThomas Gleixner2011-03-031-19/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Mark the IRQF_NO_SUSPEND interrupts IRQF_FORCE_RESUME and remove the extra walk through the interrupt descriptors. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
| * | | | | Merge branch 'irq/for-xen' of ↵Konrad Rzeszutek Wilk2011-03-033-5/+12
| |\ \ \ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip into HEAD * 'irq/for-xen' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: genirq: Add IRQF_FORCE_RESUME
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-19 14:13:29 +0100