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2009-12-03GFS2: Fix potential race in glock codeSteven Whitehouse
We need to be careful of the ordering between clearing the GLF_LOCK bit and scheduling the workqueue. Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
2009-12-03x86/reboot: Add pci_dev_put in reboot_fixup_32.c for consistencyXiaotian Feng
pci_get_device will increase the ref count of found device. Although we're going to reset soon, we should use pci_dev_put to decrease the ref count for consistency. Signed-off-by: Xiaotian Feng <dfeng@redhat.com> Acked-by: H. Peter Anvin <hpa@zytor.com> Cc: Yinghai Lu <yinghai@kernel.org> LKML-Reference: <1259838400-23833-1-git-send-email-dfeng@redhat.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-12-03mutex: Fix missing conditions to build mutex_spin_on_owner()Frederic Weisbecker
We don't need to build mutex_spin_on_owner() if we have CONFIG_DEBUG_MUTEXES or CONFIG_HAVE_DEFAULT_NO_SPIN_MUTEXES as it won't be used under such configs. Use CONFIG_MUTEX_SPIN_ON_OWNER as it gathers all the necessary checks before building it. Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com> Acked-by: Peter Zijlstra <peterz@infradead.org> LKML-Reference: <1259783357-8542-2-git-send-regression-fweisbec@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Cc: Peter Zijlstra <peterz@infradead.org>
2009-12-03mutex: Better control mutex adaptive spinning configFrederic Weisbecker
Introduce CONFIG_MUTEX_SPIN_ON_OWNER so that we can centralize in a single place the conditions that determine its definition and use. Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com> Acked-by: Peter Zijlstra <peterz@infradead.org> LKML-Reference: <1259783357-8542-1-git-send-regression-fweisbec@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Cc: Peter Zijlstra <peterz@infradead.org>
2009-12-03ASoC: au1x: dbdma2: plug memleak in pcm device creation error pathManuel Lauss
free the allocated pcm platform device in the error path. Signed-off-by: Manuel Lauss <manuel.lauss@gmail.com> Acked-by: Liam Girdwood <lrg@slimlogic.co.uk> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
2009-12-03ASoC: au1x: dbdma2: fix oops on soc device removal.Manuel Lauss
platform_device_unregister() frees resources for us, no need to do it explicitly. Fixes an oops when machine code removes the soc-audio device. Signed-off-by: Manuel Lauss <manuel.lauss@gmail.com> Acked-by: Liam Girdwood <lrg@slimlogic.co.uk> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
2009-12-03x86, Calgary IOMMU quirk: Find nearest matching Calgary while walking up the ↵Darrick J. Wong
PCI tree On a multi-node x3950M2 system, there's a slight oddity in the PCI device tree for all secondary nodes: 30:1e.0 PCI bridge: Intel Corporation 82801 PCI Bridge (rev e1) \-33:00.0 PCI bridge: IBM CalIOC2 PCI-E Root Port (rev 01) \-34:00.0 RAID bus controller: LSI Logic / Symbios Logic MegaRAID SAS 1078 (rev 04) ...as compared to the primary node: 00:1e.0 PCI bridge: Intel Corporation 82801 PCI Bridge (rev e1) \-01:00.0 VGA compatible controller: ATI Technologies Inc ES1000 (rev 02) 03:00.0 PCI bridge: IBM CalIOC2 PCI-E Root Port (rev 01) \-04:00.0 RAID bus controller: LSI Logic / Symbios Logic MegaRAID SAS 1078 (rev 04) In both nodes, the LSI RAID controller hangs off a CalIOC2 device, but on the secondary nodes, the BIOS hides the VGA device and substitutes the device tree ending with the disk controller. It would seem that Calgary devices don't necessarily appear at the top of the PCI tree, which means that the current code to find the Calgary IOMMU that goes with a particular device is buggy. Rather than walk all the way to the top of the PCI device tree and try to match bus number with Calgary descriptor, the code needs to examine each parent of the particular device; if it encounters a Calgary with a matching bus number, simply use that. Otherwise, we BUG() when the bus number of the Calgary doesn't match the bus number of whatever's at the top of the device tree. Extra note: This patch appears to work correctly for the x3950 that came before the x3950 M2. Signed-off-by: Darrick J. Wong <djwong@us.ibm.com> Acked-by: Muli Ben-Yehuda <muli@il.ibm.com> Cc: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> Cc: Joerg Roedel <joerg.roedel@amd.com> Cc: Yinghai Lu <yhlu.kernel@gmail.com> Cc: Jon D. Mason <jdmason@kudzu.us> Cc: Corinna Schultz <coschult@us.ibm.com> Cc: <stable@kernel.org> LKML-Reference: <20091202230556.GG10295@tux1.beaverton.ibm.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-12-03rcu: Make RCU's CPU-stall detector be defaultPaul E. McKenney
The RCU_CPU_STALL_DETECTOR costs almost nothing and has located some bugs that might otherwise have been difficult to track down. Make it be default for the TREE RCU implementations. The vmlinux size impact is limited (on 64-bit x86 defconfig): text data bss dec hex filename 8440248 1260076 995588 10695912 a334e8 vmlinux.before 8440774 1260060 995588 10696422 a336e6 vmlinux.after +526 bytes - acceptable default cost. For RAM starved systems, TINY_RCU does not support CPU-stall detection and is much smaller, but then again it is a uniprocessor... Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com> Acked-by: Lai Jiangshan <laijs@cn.fujitsu.com> Cc: dipankar@in.ibm.com Cc: mathieu.desnoyers@polymtl.ca Cc: josh@joshtriplett.org Cc: dvhltc@us.ibm.com Cc: niv@us.ibm.com Cc: peterz@infradead.org Cc: rostedt@goodmis.org Cc: Valdis.Kletnieks@vt.edu Cc: dhowells@redhat.com LKML-Reference: <12597846162906-git-send-email-> [ v2: added image size calculations to the changelog ] Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-12-03rcu: Add expedited grace-period support for preemptible RCUPaul E. McKenney
Implement an synchronize_rcu_expedited() for preemptible RCU that actually is expedited. This uses synchronize_sched_expedited() to force all threads currently running in a preemptible-RCU read-side critical section onto the appropriate ->blocked_tasks[] list, then takes a snapshot of all of these lists and waits for them to drain. Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com> Cc: laijs@cn.fujitsu.com Cc: dipankar@in.ibm.com Cc: mathieu.desnoyers@polymtl.ca Cc: josh@joshtriplett.org Cc: dvhltc@us.ibm.com Cc: niv@us.ibm.com Cc: peterz@infradead.org Cc: rostedt@goodmis.org Cc: Valdis.Kletnieks@vt.edu Cc: dhowells@redhat.com LKML-Reference: <1259784616158-git-send-email-> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-12-03rcu: Enable fourth level of TREE_RCU hierarchyPaul E. McKenney
Enable a fourth level of rcu_node hierarchy for TREE_RCU and TREE_PREEMPT_RCU. This is for stress-testing and experiemental purposes only, although in theory this would enable 16,777,216 CPUs on 64-bit systems, though only 1,048,576 CPUs on 32-bit systems. Normal experimental use of this fourth level will normally set CONFIG_RCU_FANOUT=2, requiring a 16-CPU system, though the more adventurous (and more fortunate) experimenters may wish to chose CONFIG_RCU_FANOUT=3 for 81-CPU systems or even CONFIG_RCU_FANOUT=4 for 256-CPU systems. Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com> Acked-by: Josh Triplett <josh@joshtriplett.org> Acked-by: Lai Jiangshan <laijs@cn.fujitsu.com> Cc: dipankar@in.ibm.com Cc: mathieu.desnoyers@polymtl.ca Cc: dvhltc@us.ibm.com Cc: niv@us.ibm.com Cc: peterz@infradead.org Cc: rostedt@goodmis.org Cc: Valdis.Kletnieks@vt.edu Cc: dhowells@redhat.com LKML-Reference: <12597846161257-git-send-email-> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-12-03rcu: Rename "quiet" functionsPaul E. McKenney
The number of "quiet" functions has grown recently, and the names are no longer very descriptive. The point of all of these functions is to do some portion of the task of reporting a quiescent state, so rename them accordingly: o cpu_quiet() becomes rcu_report_qs_rdp(), which reports a quiescent state to the per-CPU rcu_data structure. If this turns out to be a new quiescent state for this grace period, then rcu_report_qs_rnp() will be invoked to propagate the quiescent state up the rcu_node hierarchy. o cpu_quiet_msk() becomes rcu_report_qs_rnp(), which reports a quiescent state for a given CPU (or possibly a set of CPUs) up the rcu_node hierarchy. o cpu_quiet_msk_finish() becomes rcu_report_qs_rsp(), which reports a full set of quiescent states to the global rcu_state structure. o task_quiet() becomes rcu_report_unblock_qs_rnp(), which reports a quiescent state due to a task exiting an RCU read-side critical section that had previously blocked in that same critical section. As indicated by the new name, this type of quiescent state is reported up the rcu_node hierarchy (using rcu_report_qs_rnp() to do so). Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com> Acked-by: Josh Triplett <josh@joshtriplett.org> Acked-by: Lai Jiangshan <laijs@cn.fujitsu.com> Cc: dipankar@in.ibm.com Cc: mathieu.desnoyers@polymtl.ca Cc: dvhltc@us.ibm.com Cc: niv@us.ibm.com Cc: peterz@infradead.org Cc: rostedt@goodmis.org Cc: Valdis.Kletnieks@vt.edu Cc: dhowells@redhat.com LKML-Reference: <12597846163698-git-send-email-> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-12-03HID: add multi-input quirk for NextWindow Touchscreen.Peter Hutterer
These touchscreens are mounted onto HP TouchSmart and the Dell Studio One 19. Without a quirk they report a wrong button set and the x/y coordinates through ABS_Z/ABS_RX, confusing the higher levels (most notably X.Org's evdev driver). Device id 0x003 covers models 1900, 2150, and 2700 [1] though testing could only be performed on a model 1900. [1] http://www.nextwindow.com/nextwindow_support/latest_tech_info.html Signed-off-by: Peter Hutterer <peter.hutterer@redhat.com> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
2009-12-03ALSA: hda - Fix memory leaks in the previous patchTakashi Iwai
The previous hack for replacing the codec name give memory leaks at error paths. This patch fixes them. Signed-off-by: Takashi Iwai <tiwai@suse.de>
2009-12-03ALSA: hda - Add ALC661/259, ALC892/888VD supportKailang Yang
Fixed List: 1. Add alc_read_coef_idx function 2. Add ALC661 ALC259 3. Add ALC892 ALC888VD Signed-off-by: Kailang Yang <kailang@realtek.com.tw> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2009-12-03MAINTAINERS: add tree and file pattern for ARM IMXUwe Kleine-König
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de> Cc: Sascha Hauer <s.hauer@pengutronix.de> Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
2009-12-03block: Allow devices to indicate whether discarded blocks are zeroedMartin K. Petersen
The discard ioctl is used by mkfs utilities to clear a block device prior to putting metadata down. However, not all devices return zeroed blocks after a discard. Some drives return stale data, potentially containing old superblocks. It is therefore important to know whether discarded blocks are properly zeroed. Both ATA and SCSI drives have configuration bits that indicate whether zeroes are returned after a discard operation. Implement a block level interface that allows this information to be bubbled up the stack and queried via a new block device ioctl. Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
2009-12-03pata_ali: Fix regression with old devicesAlan Cox
Making the new stuff work broke some of the old chipsets. We need to go back to the old set up values for these it seems. Unfortunately even with documentation this is basically a mix of cargoculting and guesswork. Chased down to the exact line by Gianluca. Signed-off-by: Alan Cox <alan@linux.intel.com> Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
2009-12-03[libata] PATA: Update experimental tagsAlan Cox
Signed-off-by: Alan Cox <alan@linux.intel.com> Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
2009-12-03pata_cmd64x: implement serialization as per notesAlan Cox
Daniela Engert pointed out that there are some implementation notes for the 643 and 646 that deal with certain serialization rules. In theory we don't need them because they apply when the motherboard decides not to retry PCI requests for long enough and the chip is busy doing a DMA transfer on the other channel. The rule basically is "don't touch the taskfile of the other channel while a DMA is in progress". To implement that we need to - not issue a command on a channel when there is a DMA command queued - not issue a DMA command on a channel when there are PIO commands queued - use the alternative access to the interrupt source so that we do not touch altstatus or status on shared IRQ. Updated to remote extra conditional check Bartlomiej noted and to remove the variables for irq checks as the CMD648 doesn't have the underlying problem. Signed-off-by: Alan Cox <alan@linux.intel.com> Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
2009-12-03pata_sis: Implement MWDMA for the UDMA 133 capable chipsAlan Cox
Bartlomiej pointed out that while this got fixed in the old driver whoever did it didn't port it across. Signed-off-by: Alan Cox <alan@linux.intel.com> Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
2009-12-03pata_via: Blacklist some combinations of Transcend Flash and viaAlan Cox
Reported by Mikulas Patocka. VIA VT82C586B + Transcend TS64GSSD25-M v0826 does not work in UDMA mode Signed-off-by: Alan Cox <alan@linux.intel.com> Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
2009-12-03libata/sff: Use ops->bmdma_stop instead of ata_bmdma_stop()Benjamin Herrenschmidt
In libata-sff, ata_sff_post_internal_cmd() directly calls ata_bmdma_stop() instead of ap->ops->bmdma_stop(). This can be a problem for controllers that use their own bmdma_stop for which the generic sff one isn't suitable Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
2009-12-03libata: add translation for SCSI WRITE SAME (aka TRIM support)Christoph Hellwig
Add support for the ATA TRIM command in libata. We translate a WRITE SAME 16 command with the unmap bit set into an ATA TRIM command and export enough information in READ CAPACITY 16 and the block limits EVPD page so that the new SCSI layer discard support will driver this for us. Note that I hardcode the WRITE_SAME_16 opcode for now as the patch to introduce the symbolic is not in 2.6.32 yet but only in the SCSI tree - as soon as it is merged we can fix it up to properly use the symbolic name. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
2009-12-03libata: retry failed FLUSH if device didn't fail itTejun Heo
If ATA device failed FLUSH, it means that the device failed to write out some amount of data and the error needs to be reported to upper layers. As retries can't recover the lost data, FLUSH failures need to be reported immediately in general. However, if FLUSH fails due to transmission errors, the FLUSH needs to be retried; otherwise, filesystems may switch to RO mode and/or raid array may drop a drive for a random transmission glitch. This condition can be rather easily reproduced on certain ahci controllers which go through a PHY event after powersave mode switch + ext4 combination. Powersave mode switch is often closely followed by flush from the filesystem failing the FLUSH with ATA bus error which makes the filesystem code believe that data is lost and drop to RO mode. This was reported in the following bugzilla bug. http://bugzilla.kernel.org/show_bug.cgi?id=14543 This patch makes libata EH retry FLUSH if it wasn't failed by the device. Signed-off-by: Tejun Heo <tj@kernel.org> Reported-by: Andrey Vihrov <andrey.vihrov@gmail.com> Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
2009-12-03sata_fsl: Add asynchronous notification supportashish kalra
Enable device hot-plug support on Port multiplier fan-out ports Signed-off-by: Ashish Kalra <Ashish.Kalra@freescale.com> Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
2009-12-03pata_hpt{37x,3x2n}: add debounce delay to cable detection methodsBartlomiej Zolnierkiewicz
Alan Cox reported that cable detection sometimes works unreliably for HPT3xxN and that the issue is fixed by adding debounce delay as used by the vendor driver. Sergei Shtylyov also noticed that debounce delay is needed for all HPT37x and HPT3xxN chipsets according to vendor drivers. Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com> Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
2009-12-03pata_hpt3x2n: fix cable detectionBartlomiej Zolnierkiewicz
The detection was reversed between primary and secondary ports. Fix it to match hpt366 and the vendor driver. Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com> Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
2009-12-03ata: Don't require newlines for link_power_management_policyMatthew Garrett
sysfs attributes shouldn't require newlines. Make it possible to set the link power management policy without a trailing newline. Signed-off-by: Matthew Garrett <mjg@redhat.com> Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
2009-12-03pata-it821x: use PCI_DEVICE_ID_RDC_D1010 defineOtavio Salvador
Signed-off-by: Otavio Salvador <otavio@ossystems.com.br> Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
2009-12-03pata_hpt37x: unify ->pre_reset methodsBartlomiej Zolnierkiewicz
We can use the same ->pre_reset method for all HPT37x chipsets now. Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com> Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
2009-12-03pata_hpt37x: add proper cable detection methodsBartlomiej Zolnierkiewicz
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com> Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
2009-12-03ahci: disable SNotification capability for ich8Shaohua Li
I obseved there is a sata_async_notification() for every ahci interrupt. But the async notification does nothing (this is hard disk drive and no pmp). This cause cpu wastes some time on sntf register access. It appears ICH AHCI doesn't support SNotification register, but the controller reports it does. After quirking it, the async notification disappears. PS. it appears all ICH don't support SNotification register from ICH manual, don't know if we need quirk all ICH. I don't have machines with all kinds of ICH. Signed-off-by: Shaohua Li <shaohua.li@intel.com> Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
2009-12-03sata_sil24: MSI support, disabled by defaultVivek Mahajan
The following patch adds MSI support. Some platforms may have broken MSI, so those are defaulted to use legacy PCI interrupts. Signed-off-by: Vivek Mahajan <vivek.mahajan@freescale.com> Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
2009-12-03libata: remove experimental tag on PATA driversRobert Hancock
Remove the experimental tag on Parallel ATA drivers. Though some of the individual PATA drivers are still marked as experimental, as a group they can hardly be considered to be, given they've been used in various distros for some time. Signed-off-by: Robert Hancock <hancockrwd@gmail.com> Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
2009-12-03sata_mv: Clean up hard coded array size calculation.Thiago Farina
Use ARRAY_SIZE macro of kernel api instead. Signed-off-by: Thiago Farina <tfransosi@gmail.com> Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
2009-12-03pata_via: fix double put on isa bridgeJiri Slaby
In via_init_one, when via_isa_bridges iterator reaches PCI_DEVICE_ID_VIA_ANON and last but one via_isa_bridges bridge is found but rev doesn't match, pci_dev_put(isa) is called twice. Do pci_dev_put only once. Signed-off-by: Jiri Slaby <jirislaby@gmail.com> Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
2009-12-03pata_cs5536: use 32-bit BM DMA template instead of 16-bit.Krzysztof Halasa
Tested on IXP425 + CS5536. Signed-off-by: Krzysztof Hałasa <khc@pm.waw.pl> Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
2009-12-03libata-acpi: missing _SDD is not an errorTejun Heo
Missing _SDD is not an error. Don't treat it as one. Signed-off-by: Tejun Heo <tj@kernel.org> Reported-by: Takashi Iwai <tiwai@suse.de> Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
2009-12-02Merge commit 'v2.6.32' into nextDmitry Torokhov
2009-12-03KVM: VMX: Fix comparison of guest efer with stale host valueAvi Kivity
update_transition_efer() masks out some efer bits when deciding whether to switch the msr during guest entry; for example, NX is emulated using the mmu so we don't need to disable it, and LMA/LME are handled by the hardware. However, with shared msrs, the comparison is made against a stale value; at the time of the guest switch we may be running with another guest's efer. Fix by deferring the mask/compare to the actual point of guest entry. Noted by Marcelo. Signed-off-by: Avi Kivity <avi@redhat.com>
2009-12-03KVM: s390: Fix prefix register checking in arch/s390/kvm/sigp.cCarsten Otte
This patch corrects the checking of the new address for the prefix register. On s390, the prefix register is used to address the cpu's lowcore (address 0...8k). This check is supposed to verify that the memory is readable and present. copy_from_guest is a helper function, that can be used to read from guest memory. It applies prefixing, adds the start address of the guest memory in user, and then calls copy_from_user. Previous code was obviously broken for two reasons: - prefixing should not be applied here. The current prefix register is going to be updated soon, and the address we're looking for will be 0..8k after we've updated the register - we're adding the guest origin (gmsor) twice: once in subject code and once in copy_from_guest With kuli, we did not hit this problem because (a) we were lucky with previous prefix register content, and (b) our guest memory was mmaped very low into user address space. Cc: stable@kernel.org Signed-off-by: Carsten Otte <cotte@de.ibm.com> Reported-by: Alexander Graf <agraf@suse.de> Signed-off-by: Avi Kivity <avi@redhat.com>
2009-12-03KVM: Drop user return notifier when disabling virtualization on a cpuAvi Kivity
This way, we don't leave a dangling notifier on cpu hotunplug or module unload. In particular, module unload leaves the notifier pointing into freed memory. Signed-off-by: Avi Kivity <avi@redhat.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
2009-12-03KVM: VMX: Disable unrestricted guest when EPT disabledSheng Yang
Otherwise would cause VMEntry failure when using ept=0 on unrestricted guest supported processors. Signed-off-by: Sheng Yang <sheng@linux.intel.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
2009-12-03KVM: x86 emulator: limit instructions to 15 bytesAvi Kivity
While we are never normally passed an instruction that exceeds 15 bytes, smp games can cause us to attempt to interpret one, which will cause large latencies in non-preempt hosts. Cc: stable@kernel.org Signed-off-by: Avi Kivity <avi@redhat.com>
2009-12-03KVM: s390: Make psw available on all exits, not just a subsetCarsten Otte
This patch moves s390 processor status word into the base kvm_run struct and keeps it up-to date on all userspace exits. The userspace ABI is broken by this, however there are no applications in the wild using this. A capability check is provided so users can verify the updated API exists. Cc: stable@kernel.org Signed-off-by: Carsten Otte <cotte@de.ibm.com> Signed-off-by: Avi Kivity <avi@redhat.com>
2009-12-03KVM: x86: Add KVM_GET/SET_VCPU_EVENTSJan Kiszka
This new IOCTL exports all yet user-invisible states related to exceptions, interrupts, and NMIs. Together with appropriate user space changes, this fixes sporadic problems of vmsave/restore, live migration and system reset. [avi: future-proof abi by adding a flags field] Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com> Signed-off-by: Avi Kivity <avi@redhat.com>
2009-12-03KVM: VMX: Report unexpected simultaneous exceptions as internal errorsAvi Kivity
These happen when we trap an exception when another exception is being delivered; we only expect these with MCEs and page faults. If something unexpected happens, things probably went south and we're better off reporting an internal error and freezing. Signed-off-by: Avi Kivity <avi@redhat.com>
2009-12-03KVM: Allow internal errors reported to userspace to carry extra dataAvi Kivity
Usually userspace will freeze the guest so we can inspect it, but some internal state is not available. Add extra data to internal error reporting so we can expose it to the debugger. Extra data is specific to the suberror. Signed-off-by: Avi Kivity <avi@redhat.com>
2009-12-03KVM: Reorder IOCTLs in main kvm.hJan Kiszka
Obviously, people tend to extend this header at the bottom - more or less blindly. Ensure that deprecated stuff gets its own corner again by moving things to the top. Also add some comments and reindent IOCTLs to make them more readable and reduce the risk of number collisions. Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com> Signed-off-by: Avi Kivity <avi@redhat.com>
2009-12-03KVM: x86: Polish exception injection via KVM_SET_GUEST_DEBUGJan Kiszka
Decouple KVM_GUESTDBG_INJECT_DB and KVM_GUESTDBG_INJECT_BP from KVM_GUESTDBG_ENABLE, their are actually orthogonal. At this chance, avoid triggering the WARN_ON in kvm_queue_exception if there is already an exception pending and reject such invalid requests. Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
generated by cgit (git 2.34.1) at 2025-09-18 14:06:18 +0000