- 20 May, 2015 18 commits
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Christoffer Dall authored
commit c3058d5d upstream. When creating or moving a memslot, make sure the IPA space is within the addressable range of the guest. Otherwise, user space can create too large a memslot and KVM would try to access potentially unallocated page table entries when inserting entries in the Stage-2 page tables. Acked-by:
Catalin Marinas <catalin.marinas@arm.com> Acked-by:
Marc Zyngier <marc.zyngier@arm.com> Signed-off-by:
Christoffer Dall <christoffer.dall@linaro.org> Signed-off-by:
Shannon Zhao <shannon.zhao@linaro.org> [ luis: backported to 3.16: used shannon's backport for 3.14 ] Signed-off-by:
Luis Henriques <luis.henriques@canonical.com>
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Ard Biesheuvel authored
commit 37b54408 upstream. Handle the potential NULL return value of find_vma_intersection() before dereferencing it. Acked-by:
Ard Biesheuvel <ard.biesheuvel@linaro.org> Signed-off-by:
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Vladimir Murzin authored
commit 37a34ac1 upstream. On some platforms with no power management capabilities, the hotplug implementation is allowed to return from a smp_ops.cpu_die() call as a function return. Upon a CPU onlining event, the KVM CPU notifier tries to reinstall the hyp stub, which fails on platform where no reset took place following a hotplug event, with the message: CPU1: smp_ops.cpu_die() returned, trying to resuscitate CPU1: Booted secondary processor Kernel panic - not syncing: unexpected prefetch abort in Hyp mode at: 0x80409540 unexpected data abort in Hyp mode at: 0x80401fe8 unexpected HVC/SVC trap in Hyp mode at: 0x805c6170 since KVM code is trying to reinstall the stub on a system where it is already configured. To prevent this issue, this patch adds a check in the KVM hotplug notifier that detects if the HYP stub really needs re-installing when a CPU is onlined and skips the installation call if the stub is already in place, which means that the CPU has not been reset. Signed-off-by:
Vladimir Murzin <vladimir.murzin@arm.com> Acked-by:
Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> Acked-by:
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Joel Schopp authored
commit dbff124e upstream. The current aarch64 calculation for VTTBR_BADDR_MASK masks only 39 bits and not all the bits in the PA range. This is clearly a bug that manifests itself on systems that allocate memory in the higher address space range. [ Modified from Joel's original patch to be based on PHYS_MASK_SHIFT instead of a hard-coded value and to move the alignment check of the allocation to mmu.c. Also added a comment explaining why we hardcode the IPA range and changed the stage-2 pgd allocation to be based on the 40 bit IPA range instead of the maximum possible 48 bit PA range. - Christoffer ] Reviewed-by:
Joel Schopp <joel.schopp@amd.com> Signed-off-by:
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Christoffer Dall authored
commit 0fea6d76 upstream. The sgi values calculated in read_set_clear_sgi_pend_reg() and write_set_clear_sgi_pend_reg() were horribly incorrectly multiplied by 4 with catastrophic results in that subfunctions ended up overwriting memory not allocated for the expected purpose. This showed up as bugs in kfree() and the kernel complaining a lot of you turn on memory debugging. This addresses: http://marc.info/?l=kvm&m=141164910007868&w=2Reported-by:
Shannon Zhao <zhaoshenglong@huawei.com> Signed-off-by:
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Marc Zyngier authored
commit 71afaba4 upstream. As it stands, nothing prevents userspace from injecting an interrupt before the guest's GIC is actually initialized. This goes unnoticed so far (as everything is pretty much statically allocated), but ends up exploding in a spectacular way once we switch to a more dynamic allocation (the GIC data structure isn't there yet). The fix is to test for the "ready" flag in the VGIC distributor before trying to inject the interrupt. Note that in order to avoid breaking userspace, we have to ignore what is essentially an error. Signed-off-by:
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Ard Biesheuvel authored
commit a7d079ce upstream. The ISS encoding for an exception from a Data Abort has a WnR bit[6] that indicates whether the Data Abort was caused by a read or a write instruction. While there are several fields in the encoding that are only valid if the ISV bit[24] is set, WnR is not one of them, so we can read it unconditionally. Instead of fixing both implementations of kvm_is_write_fault() in place, reimplement it just once using kvm_vcpu_dabt_iswrite(), which already does the right thing with respect to the WnR bit. Also fix up the callers to pass 'vcpu' Acked-by:
Laszlo Ersek <lersek@redhat.com> Acked-by:
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Will Deacon authored
commit 1fa451bc upstream. vgic_ioaddr_overlap claims to return a bool, but in reality it returns an int. Shut sparse up by fixing the type signature. Cc: Christoffer Dall <christoffer.dall@linaro.org> Cc: Marc Zyngier <marc.zyngier@arm.com> Signed-off-by:
Will Deacon <will.deacon@arm.com> Signed-off-by:
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Will Deacon authored
commit 18d45766 upstream. is_valid_cache returns true if the specified cache is valid. Unfortunately, if the parameter passed it out of range, we return -ENOENT, which ends up as true leading to potential hilarity. This patch returns false on the failure path instead. Cc: Christoffer Dall <christoffer.dall@linaro.org> Cc: Marc Zyngier <marc.zyngier@arm.com> Signed-off-by:
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Will Deacon authored
commit 4000be42 upstream. Running sparse results in a bunch of noisy address space mismatches thanks to the broken __percpu annotation on kvm_get_running_vcpus. This function returns a pcpu pointer to a pointer, not a pointer to a pcpu pointer. This patch fixes the annotation, which kills the warnings from sparse. Cc: Christoffer Dall <christoffer.dall@linaro.org> Cc: Marc Zyngier <marc.zyngier@arm.com> Signed-off-by:
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Will Deacon authored
commit 6951e48b upstream. Sparse kicks up about a type mismatch for kvm_target_cpu: arch/arm64/kvm/guest.c:271:25: error: symbol 'kvm_target_cpu' redeclared with different type (originally declared at ./arch/arm64/include/asm/kvm_host.h:45) - different modifiers so fix this by adding the missing const attribute to the function declaration. Cc: Christoffer Dall <christoffer.dall@linaro.org> Cc: Marc Zyngier <marc.zyngier@arm.com> Signed-off-by:
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Victor Kamensky authored
commit ba083d20 upstream. esr_el2 field of struct kvm_vcpu_fault_info has u32 type. It should be stored as word. Current code works in LE case because existing puts least significant word of x1 into esr_el2, and it puts most significant work of x1 into next field, which accidentally is OK because it is updated again by next instruction. But existing code breaks in BE case. Signed-off-by:
Victor Kamensky <victor.kamensky@linaro.org> Acked-by:
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Li Liu authored
commit af92394e upstream. HSCTLR.EE is defined as bit[25] referring to arm manual DDI0606C.b(p1590). Reviewed-by:
Li Liu <john.liuli@huawei.com> Signed-off-by:
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Alex Bennée authored
commit efd48cea upstream. I suspect this is a -ECUTPASTE fault from the initial implementation. If we don't declare the register ID to be KVM_REG_ARM64 the KVM_GET_ONE_REG implementation kvm_arm_get_reg() returns -EINVAL and hilarity ensues. The kvm/api.txt document describes all arm64 registers as starting with 0x60xx... (i.e KVM_REG_ARM64). Signed-off-by:
Alex Bennée <alex.bennee@linaro.org> Acked-by:
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Kim Phillips authored
commit b8865767 upstream. A userspace process can map device MMIO memory via VFIO or /dev/mem, e.g., for platform device passthrough support in QEMU. During early development, we found the PAGE_S2 memory type being used for MMIO mappings. This patch corrects that by using the more strongly ordered memory type for device MMIO mappings: PAGE_S2_DEVICE. Signed-off-by:
Kim Phillips <kim.phillips@linaro.org> Acked-by:
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Eric Auger authored
commit df6ce24f upstream. Currently when a KVM region is deleted or moved after KVM_SET_USER_MEMORY_REGION ioctl, the corresponding intermediate physical memory is not unmapped. This patch corrects this and unmaps the region's IPA range in kvm_arch_commit_memory_region using unmap_stage2_range. Signed-off-by:
Eric Auger <eric.auger@linaro.org> Signed-off-by:
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Christoffer Dall authored
commit 4f853a71 upstream. unmap_range() was utterly broken, to quote Marc, and broke in all sorts of situations. It was also quite complicated to follow and didn't follow the usual scheme of having a separate iterating function for each level of page tables. Address this by refactoring the code and introduce a pgd_clear() function. Reviewed-by:
Jungseok Lee <jays.lee@samsung.com> Reviewed-by:
Mario Smarduch <m.smarduch@samsung.com> Acked-by:
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Luis Henriques authored
This reverts commit 65342eab which is commit 97534127 upstream. This is being reverted because it fixes a regression that was introduced in 4.0 and does not affect 3.16 kernel. Cc: Gerald Schaefer <gerald.schaefer@de.ibm.com> Cc: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com> Cc: Hugh Dickins <hughd@google.com> Cc: Michal Hocko <mhocko@suse.cz> Cc: Andrea Arcangeli <aarcange@redhat.com> Cc: Martin Schwidefsky <schwidefsky@de.ibm.com> Cc: David Rientjes <rientjes@google.com> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Ben Hutchings <ben@decadent.org.uk> Signed-off-by:
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- 18 May, 2015 1 commit
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Luis Henriques authored
This reverts commit aba636b8 which is commit 6ada5c1e upstream. This is being reverted because it fixes a regression that was introduced in 4.0 and does not affect 3.16 kernel. Cc: Charles Keepax <ckeepax@opensource.wolfsonmicro.com> Cc: Beata Michalska <b.michalska@samsung.com> Cc: Wolfram Sang <wsa@the-dreams.de> Cc: Ben Hutchings <ben@decadent.org.uk> Signed-off-by:
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- 12 May, 2015 21 commits
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Nathan Fontenot authored
commit f32393c9 upstream. The incorrect ordering of operations during cpu dlpar add results in invalid affinity for the cpu being added. The ibm,associativity property in the device tree is populated with all zeroes for the added cpu which results in invalid affinity mappings and all cpus appear to belong to node 0. This occurs because rtas configure-connector is called prior to making the rtas set-indicator calls. Phyp does not assign affinity information for a cpu until the rtas set-indicator calls are made to set the isolation and allocation state. Correct the order of operations to make the rtas set-indicator calls (done in dlpar_acquire_drc) before calling rtas configure-connector. Fixes: 1a8061c4 ("powerpc/pseries: Add kernel based CPU DLPAR handling") Signed-off-by:
Nathan Fontenot <nfont@linux.vnet.ibm.com> Signed-off-by:
Michael Ellerman <mpe@ellerman.id.au> Signed-off-by:
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Benjamin Poirier authored
commit f94813f3 upstream. Signed-off-by:
Benjamin Poirier <bpoirier@suse.de> Fixes: 9e311e77 ("net/mlx4_en: Use affinity hint") Acked-by:
Amir Vadai <amirv@mellanox.com> Signed-off-by:
David S. Miller <davem@davemloft.net> Signed-off-by:
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Nicolas Dichtel authored
commit 82199679 upstream. NLM_F_MULTI must be used only when a NLMSG_DONE message is sent. In fact, it is sent only at the end of a dump. Libraries like libnl will wait forever for NLMSG_DONE. Fixes: 37a393bc ("bridge: notify mdb changes via netlink") CC: Cong Wang <amwang@redhat.com> CC: Stephen Hemminger <stephen@networkplumber.org> CC: bridge@lists.linux-foundation.org Signed-off-by:
Nicolas Dichtel <nicolas.dichtel@6wind.com> Signed-off-by:
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Davide Italiano authored
commit 280227a7 upstream. fallocate() checks that the file is extent-based and returns EOPNOTSUPP in case is not. Other tasks can convert from and to indirect and extent so it's safe to check only after grabbing the inode mutex. Signed-off-by:
Davide Italiano <dccitaliano@gmail.com> Signed-off-by:
Theodore Ts'o <tytso@mit.edu> Signed-off-by:
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Lukas Czerner authored
commit d2dc317d upstream. Currently it is possible to lose whole file system block worth of data when we hit the specific interaction with unwritten and delayed extents in status extent tree. The problem is that when we insert delayed extent into extent status tree the only way to get rid of it is when we write out delayed buffer. However there is a limitation in the extent status tree implementation so that when inserting unwritten extent should there be even a single delayed block the whole unwritten extent would be marked as delayed. At this point, there is no way to get rid of the delayed extents, because there are no delayed buffers to write out. So when a we write into said unwritten extent we will convert it to written, but it still remains delayed. When we try to write into that block later ext4_da_map_blocks() will set the buffer new and delayed and map it to invalid block which causes the rest of the block to be zeroed loosing already written data. For now we can fix this by simply not allowing to set delayed status on written extent in the extent status tree. Also add WARN_ON() to make sure that we notice if this happens in the future. This problem can be easily reproduced by running the following xfs_io. xfs_io -f -c "pwrite -S 0xaa 4096 2048" \ -c "falloc 0 131072" \ -c "pwrite -S 0xbb 65536 2048" \ -c "fsync" /mnt/test/fff echo 3 > /proc/sys/vm/drop_caches xfs_io -c "pwrite -S 0xdd 67584 2048" /mnt/test/fff This can be theoretically also reproduced by at random by running fsx, but it's not very reliable, though on machines with bigger page size (like ppc) this can be seen more often (especially xfstest generic/127) Signed-off-by:
Lukas Czerner <lczerner@redhat.com> Signed-off-by:
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Ilya Dryomov authored
commit 082a75da upstream. When we end I/O struct request with error, we need to pass obj_request->length as @nr_bytes so that the entire obj_request worth of bytes is completed. Otherwise block layer ends up confused and we trip on rbd_assert(more ^ (which == img_request->obj_request_count)); in rbd_img_obj_callback() due to more being true no matter what. We already do it in most cases but we are missing some, in particular those where we don't even get a chance to submit any obj_requests, due to an early -ENOMEM for example. A number of obj_request->xferred assignments seem to be redundant but I haven't touched any of obj_request->xferred stuff to keep this small and isolated. Cc: Alex Elder <elder@linaro.org> Reported-by:
Shawn Edwards <lesser.evil@gmail.com> Reviewed-by:
Sage Weil <sage@redhat.com> Signed-off-by:
Ilya Dryomov <idryomov@gmail.com> Signed-off-by:
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Peter Zubaj authored
commit 7241ea55 upstream. Looks like audigy emu10k2 (probably emu10k1 - sb live too) support two modes for DMA. Second mode is useful for 64 bit os with more then 2 GB of ram (fixes problems with big soundfont loading) 1) 32MB from 2 GB address space using 8192 pages (used now as default) 2) 16MB from 4 GB address space using 4096 pages Mode is set using HCFG_EXPANDED_MEM flag in HCFG register. Also format of emu10k2 page table is then different. Signed-off-by:
Peter Zubaj <pzubaj@marticonet.sk> Tested-by:
Takashi Iwai <tiwai@suse.de> Signed-off-by:
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Takashi Iwai authored
commit 1c94e65c upstream. The OSS emulation in synth-emux helper has a potential AB/BA deadlock at the simultaneous closing and opening: close -> snd_seq_release() -> sne_seq_free_client() -> snd_seq_delete_all_ports(): takes client->ports_mutex -> port_delete() -> snd_emux_unuse(): takes emux->register_mutex open -> snd_seq_oss_open() -> snd_emux_open_seq_oss(): takes emux->register_mutex -> snd_seq_event_port_attach() -> snd_seq_create_port(): takes client->ports_mutex This patch addresses the deadlock by reducing the rance taking emux->register_mutex in snd_emux_open_seq_oss(). The lock is needed for the refcount handling, so move it locally. The calls in emux_seq.c are already with the mutex, thus they are replaced with the version without mutex lock/unlock. Signed-off-by:
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Ludovic Desroches authored
commit a8d4e016 upstream. Maxburst was not set when doing the dma slave configuration. This value is checked by the recently introduced xdmac. It causes an error when doing the slave configuration and so prevents from using dma. Signed-off-by:
Ludovic Desroches <ludovic.desroches@atmel.com> Acked-by:
Nicolas Ferre <nicolas.ferre@atmel.com> Signed-off-by:
Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by:
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Michal Simek authored
commit 6befa9d8 upstream. Do not probe all serial drivers by of_serial.c which are using device_type = "serial"; property. Only drivers which have valid compatible strings listed in the driver should be probed. When PORT_UNKNOWN is setup probe will fail anyway. Arnd quotation about driver historical background: "when I wrote that driver initially, the idea was that it would get used as a stub to hook up all other serial drivers but after that, the common code learned to create platform devices from DT" This patch fix the problem with on the system with xilinx_uartps and 16550a where of_serial failed to register for xilinx_uartps and because of irq_dispose_mapping() removed irq_desc. Then when xilinx_uartps was asking for irq with request_irq() EINVAL is returned. Signed-off-by:
Michal Simek <michal.simek@xilinx.com> Acked-by:
Arnd Bergmann <arnd@arndb.de> Signed-off-by:
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Michal Simek authored
commit 5c90c07b upstream. For systems with CONFIG_SERIAL_OF_PLATFORM=y and device_type = "serial"; property in DT of_serial.c driver maps and unmaps IRQ (because driver probe fails). Then a driver is called but irq mapping is not created that's why driver is failing again in again on request_irq(). Based on this use platform_get_irq() instead of platform_get_resource() which is doing irq_desc allocation and driver itself can request IRQ. Fix both xilinx serial drivers in the tree. Signed-off-by:
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Quentin Casasnovas authored
commit 0d3bba02 upstream. Phil and I found out a problem with commit: 7e860a6e ("cdc-acm: add sanity checks") It added some sanity checks to ignore potential garbage in CDC headers but also introduced a potential infinite loop. This can happen at the first loop iteration (elength = 0 in that case) if the description isn't a DT_CS_INTERFACE or later if 'buffer[0]' is zero. It should also be noted that the wrong length was being added to 'buffer' in case 'buffer[1]' was not a DT_CS_INTERFACE descriptor, since elength was assigned after that check in the loop. A specially crafted USB device could be used to trigger this infinite loop. Fixes: 7e860a6e ("cdc-acm: add sanity checks") Signed-off-by:
Phil Turnbull <phil.turnbull@oracle.com> Signed-off-by:
Quentin Casasnovas <quentin.casasnovas@oracle.com> CC: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com> CC: Oliver Neukum <oneukum@suse.de> CC: Adam Lee <adam8157@gmail.com> Signed-off-by:
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Li Jun authored
commit a5a356ce upstream. Wrongly release mutex lock during otg_statemachine may result in re-enter otg_statemachine, which is not allowed, we should do next state transtition after previous one completed. Fixes: 826cfe75 ("usb: chipidea: add OTG fsm operation functions implementation") Signed-off-by:
Li Jun <jun.li@freescale.com> Signed-off-by:
Peter Chen <peter.chen@freescale.com> Signed-off-by:
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Hans de Goede authored
commit 8e779c6c upstream. Testing has shown that ASM1053 devices do not work properly with transfers larger than 240 sectors, so set max_sectors to 240 on these. Reported-by:
Steve Bangert <sbangert@frontier.com> Signed-off-by:
Hans de Goede <hdegoede@redhat.com> Tested-by:
Alan Stern <stern@rowland.harvard.edu> Signed-off-by:
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Hans de Goede authored
commit ee136af4 upstream. The usb-storage driver sets max_sectors = 240 in its scsi-host template, for uas we do not want to do that for all devices, but testing has shown that some devices need it. This commit adds a US_FL_MAX_SECTORS_240 flag for such devices, and implements support for it in uas.c, while at it it also adds support for US_FL_MAX_SECTORS_64 to uas.c. Signed-off-by:
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Hans de Goede authored
commit a5011d44 upstream. uas_use_uas_driver may set some US_FL_foo flags during detection, currently these are stored in a local variable and then throw away, but these may be of interest to the caller, so add an extra parameter to (optionally) return the detected flags, and use this in the uas driver. Signed-off-by:
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Christoph Hellwig authored
commit 118c855b upstream. The 3w-9xxx driver needs to tear down the dma mappings before returning the command to the midlayer, as there is no guarantee the sglist and count are valid after that point. Also remove the dma mapping helpers which have another inherent race due to the request_id index. Signed-off-by:
Christoph Hellwig <hch@lst.de> Acked-by:
Adam Radford <aradford@gmail.com> Signed-off-by:
James Bottomley <JBottomley@Odin.com> Signed-off-by:
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Christoph Hellwig authored
commit 9cd95546 upstream. The 3w-xxxx driver needs to tear down the dma mappings before returning the command to the midlayer, as there is no guarantee the sglist and count are valid after that point. Also remove the dma mapping helpers which have another inherent race due to the request_id index. Signed-off-by:
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Christoph Hellwig authored
commit 579d69bc upstream. The 3w-sas driver needs to tear down the dma mappings before returning the command to the midlayer, as there is no guarantee the sglist and count are valid after that point. Also remove the dma mapping helpers which have another inherent race due to the request_id index. Signed-off-by:
Torsten Luettgert <ml-lkml@enda.eu> Tested-by:
Bernd Kardatzki <Bernd.Kardatzki@med.uni-tuebingen.de> Acked-by:
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Mike Christie authored
commit 35e9a9f9 upstream. This works around a issue with qnap iscsi targets not handling large IOs very well. The target returns: VPD INQUIRY: Block limits page (SBC) Maximum compare and write length: 1 blocks Optimal transfer length granularity: 1 blocks Maximum transfer length: 4294967295 blocks Optimal transfer length: 4294967295 blocks Maximum prefetch, xdread, xdwrite transfer length: 0 blocks Maximum unmap LBA count: 8388607 Maximum unmap block descriptor count: 1 Optimal unmap granularity: 16383 Unmap granularity alignment valid: 0 Unmap granularity alignment: 0 Maximum write same length: 0xffffffff blocks Maximum atomic transfer length: 0 Atomic alignment: 0 Atomic transfer length granularity: 0 and it is *sometimes* able to handle at least one IO of size up to 8 MB. We have seen in traces where it will sometimes work, but other times it looks like it fails and it looks like it returns failures if we send multiple large IOs sometimes. Also it looks like it can return 2 different errors. It will sometimes send iscsi reject errors indicating out of resources or it will send invalid cdb illegal requests check conditions. And then when it sends iscsi rejects it does not seem to handle retries when there are command sequence holes, so I could not just add code to try and gracefully handle that error code. The problem is that we do not have a good contact for the company, so we are not able to determine under what conditions it returns which error and why it sometimes works. So, this patch just adds a new black list flag to set targets like this to the old max safe sectors of 1024. The max_hw_sectors changes added in 3.19 caused this regression, so I also ccing stable. Reported-by:
Christian Hesse <list@eworm.de> Signed-off-by:
Mike Christie <michaelc@cs.wisc.edu> Reviewed-by:
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Alex Deucher authored
commit cd17e02f upstream. Seems to have problems with high mclks. bug: https://bugs.freedesktop.org/show_bug.cgi?id=76490Signed-off-by:
Alex Deucher <alexander.deucher@amd.com> Signed-off-by:
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