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2017-03-28MIPS: Probe guest CP0_UserLocalJames Hogan2-1/+8
Probe for presence of guest CP0_UserLocal register and expose via cpu_guest_has_userlocal. This register is optional pre-r6, so this will allow KVM to only save/restore/expose the guest CP0_UserLocal register if it exists. Signed-off-by: James Hogan <[email protected]> Acked-by: Ralf Baechle <[email protected]> Cc: Paolo Bonzini <[email protected]> Cc: "Radim Krčmář" <[email protected]> Cc: [email protected] Cc: [email protected]
2017-03-28MIPS: Separate MAAR V bit into VL and VH for XPAJames Hogan3-7/+13
The MAAR V bit has been renamed VL since another bit called VH is added at the top of the register when it is extended to 64-bits on a 32-bit processor with XPA. Rename the V definition, fix the various users, and add definitions for the VH bit. Also add a definition for the MAARI Index field. Signed-off-by: James Hogan <[email protected]> Acked-by: Ralf Baechle <[email protected]> Cc: Paul Burton <[email protected]> Cc: Paolo Bonzini <[email protected]> Cc: "Radim Krčmář" <[email protected]> Cc: [email protected] Cc: [email protected]
2017-03-28MIPS: Add defs & probing of UFRJames Hogan3-0/+7
Add definitions and probing of the UFR bit in Config5. This bit allows user mode control of the FR bit (floating point register mode). It is present if the UFRP bit is set in the floating point implementation register. This is a capability KVM may want to expose to guest kernels, even though Linux is unlikely to ever use it due to the implications for multi-threaded programs. Signed-off-by: James Hogan <[email protected]> Acked-by: Ralf Baechle <[email protected]> Cc: Paul Burton <[email protected]> Cc: Paolo Bonzini <[email protected]> Cc: "Radim Krčmář" <[email protected]> Cc: [email protected] Cc: [email protected]
2017-03-28KVM: x86: cleanup the page tracking SRCU instancePaolo Bonzini3-0/+10
SRCU uses a delayed work item. Skip cleaning it up, and the result is use-after-free in the work item callbacks. Reported-by: Dmitry Vyukov <[email protected]> Suggested-by: Dmitry Vyukov <[email protected]> Cc: [email protected] Fixes: 0eb05bf290cfe8610d9680b49abef37febd1c38a Reviewed-by: Xiao Guangrong <[email protected]> Signed-off-by: Paolo Bonzini <[email protected]>
2017-03-28KVM: nVMX: fix nested EPT detectionLadi Prosek1-4/+1
The nested_ept_enabled flag introduced in commit 7ca29de2136 was not computed correctly. We are interested only in L1's EPT state, not the the combined L0+L1 value. In particular, if L0 uses EPT but L1 does not, nested_ept_enabled must be false to make sure that PDPSTRs are loaded based on CR3 as usual, because the special case described in 26.3.2.4 Loading Page-Directory- Pointer-Table Entries does not apply. Fixes: 7ca29de21362 ("KVM: nVMX: fix CR3 load if L2 uses PAE paging and EPT") Cc: [email protected] Reported-by: Wanpeng Li <[email protected]> Reviewed-by: David Hildenbrand <[email protected]> Signed-off-by: Ladi Prosek <[email protected]> Signed-off-by: Paolo Bonzini <[email protected]>
2017-03-28KVM: pci-assign: do not map smm memory slot pages in vt-d page tablesHerongguang (Stephen)1-1/+1
or VM memory are not put thus leaked in kvm_iommu_unmap_memslots() when destroy VM. This is consistent with current vfio implementation. Signed-off-by: herongguang <[email protected]> Signed-off-by: Paolo Bonzini <[email protected]>
2017-03-27powerpc/mmu: Add real mode support for IOMMU preregistered memoryAlexey Kardashevskiy2-0/+43
This makes mm_iommu_lookup() able to work in realmode by replacing list_for_each_entry_rcu() (which can do debug stuff which can fail in real mode) with list_for_each_entry_lockless(). This adds realmode version of mm_iommu_ua_to_hpa() which adds explicit vmalloc'd-to-linear address conversion. Unlike mm_iommu_ua_to_hpa(), mm_iommu_ua_to_hpa_rm() can fail. This changes mm_iommu_preregistered() to receive @mm as in real mode @current does not always have a correct pointer. This adds realmode version of mm_iommu_lookup() which receives @mm (for the same reason as for mm_iommu_preregistered()) and uses lockless version of list_for_each_entry_rcu(). Signed-off-by: Alexey Kardashevskiy <[email protected]> Reviewed-by: David Gibson <[email protected]> Signed-off-by: Michael Ellerman <[email protected]>
2017-03-24x86/syscalls/32: Ignore arch_prctl for other architecturesArnd Bergmann1-0/+1
sys_arch_prctl is only provided on x86, and there is no reason to add it elsewhere. However, including it on the 32-bit syscall table caused a warning for most configurations on non-x86: :1328:2: warning: #warning syscall arch_prctl not implemented [-Wcpp] This adds an exception to the syscall table checking script. Fixes: 79170fda313e ("x86/syscalls/32: Wire up arch_prctl on x86-32") Signed-off-by: Arnd Bergmann <[email protected]> Cc: Kyle Huey <[email protected]> Link: http://lkml.kernel.org/r/[email protected] Signed-off-by: Thomas Gleixner <[email protected]>
2017-03-23KVM: kvm_io_bus_unregister_dev() should never failDavid Hildenbrand3-20/+29
No caller currently checks the return value of kvm_io_bus_unregister_dev(). This is evil, as all callers silently go on freeing their device. A stale reference will remain in the io_bus, getting at least used again, when the iobus gets teared down on kvm_destroy_vm() - leading to use after free errors. There is nothing the callers could do, except retrying over and over again. So let's simply remove the bus altogether, print an error and make sure no one can access this broken bus again (returning -ENOMEM on any attempt to access it). Fixes: e93f8a0f821e ("KVM: convert io_bus to SRCU") Cc: [email protected] # 3.4+ Reported-by: Dmitry Vyukov <[email protected]> Reviewed-by: Cornelia Huck <[email protected]> Signed-off-by: David Hildenbrand <[email protected]> Signed-off-by: Paolo Bonzini <[email protected]>
2017-03-23KVM: VMX: Fix enable VPID conditionsWanpeng Li1-1/+8
This can be reproduced by running L2 on L1, and disable VPID on L0 if w/o commit "KVM: nVMX: Fix nested VPID vmx exec control", the L2 crash as below: KVM: entry failed, hardware error 0x7 EAX=00000000 EBX=00000000 ECX=00000000 EDX=000306c3 ESI=00000000 EDI=00000000 EBP=00000000 ESP=00000000 EIP=0000fff0 EFL=00000002 [-------] CPL=0 II=0 A20=1 SMM=0 HLT=0 ES =0000 00000000 0000ffff 00009300 CS =f000 ffff0000 0000ffff 00009b00 SS =0000 00000000 0000ffff 00009300 DS =0000 00000000 0000ffff 00009300 FS =0000 00000000 0000ffff 00009300 GS =0000 00000000 0000ffff 00009300 LDT=0000 00000000 0000ffff 00008200 TR =0000 00000000 0000ffff 00008b00 GDT= 00000000 0000ffff IDT= 00000000 0000ffff CR0=60000010 CR2=00000000 CR3=00000000 CR4=00000000 DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000 DR6=00000000ffff0ff0 DR7=0000000000000400 EFER=0000000000000000 Reference SDM 30.3 INVVPID: Protected Mode Exceptions - #UD - If not in VMX operation. - If the logical processor does not support VPIDs (IA32_VMX_PROCBASED_CTLS2[37]=0). - If the logical processor supports VPIDs (IA32_VMX_PROCBASED_CTLS2[37]=1) but does not support the INVVPID instruction (IA32_VMX_EPT_VPID_CAP[32]=0). So we should check both VPID enable bit in vmx exec control and INVVPID support bit in vmx capability MSRs to enable VPID. This patch adds the guarantee to not enable VPID if either INVVPID or single-context/all-context invalidation is not exposed in vmx capability MSRs. Reviewed-by: David Hildenbrand <[email protected]> Reviewed-by: Jim Mattson <[email protected]> Cc: Paolo Bonzini <[email protected]> Cc: Radim Krčmář <[email protected]> Signed-off-by: Wanpeng Li <[email protected]> Signed-off-by: Paolo Bonzini <[email protected]>
2017-03-23KVM: nVMX: Fix nested VPID vmx exec controlWanpeng Li1-3/+4
This can be reproduced by running kvm-unit-tests/vmx.flat on L0 w/ vpid disabled. Test suite: VPID Unhandled exception 6 #UD at ip 00000000004051a6 error_code=0000 rflags=00010047 cs=00000008 rax=0000000000000000 rcx=0000000000000001 rdx=0000000000000047 rbx=0000000000402f79 rbp=0000000000456240 rsi=0000000000000001 rdi=0000000000000000 r8=000000000000000a r9=00000000000003f8 r10=0000000080010011 r11=0000000000000000 r12=0000000000000003 r13=0000000000000708 r14=0000000000000000 r15=0000000000000000 cr0=0000000080010031 cr2=0000000000000000 cr3=0000000007fff000 cr4=0000000000002020 cr8=0000000000000000 STACK: @4051a6 40523e 400f7f 402059 40028f We should hide and forbid VPID in L1 if it is disabled on L0. However, nested VPID enable bit is set unconditionally during setup nested vmx exec controls though VPID is not exposed through nested VMX capablity. This patch fixes it by don't set nested VPID enable bit if it is disabled on L0. Cc: Paolo Bonzini <[email protected]> Cc: Radim Krčmář <[email protected]> Cc: [email protected] Fixes: 5c614b3583e (KVM: nVMX: nested VPID emulation) Signed-off-by: Wanpeng Li <[email protected]> Signed-off-by: Paolo Bonzini <[email protected]>
2017-03-23KVM: x86: correct async page present tracepointWanpeng Li1-1/+1
After async pf setup successfully, there is a broadcast wakeup w/ special token 0xffffffff which tells vCPU that it should wake up all processes waiting for APFs though there is no real process waiting at the moment. The async page present tracepoint print prematurely and fails to catch the special token setup. This patch fixes it by moving the async page present tracepoint after the special token setup. Before patch: qemu-system-x86-8499 [006] ...1 5973.473292: kvm_async_pf_ready: token 0x0 gva 0x0 After patch: qemu-system-x86-8499 [006] ...1 5973.473292: kvm_async_pf_ready: token 0xffffffff gva 0x0 Cc: Paolo Bonzini <[email protected]> Cc: Radim Krčmář <[email protected]> Signed-off-by: Wanpeng Li <[email protected]> Signed-off-by: Paolo Bonzini <[email protected]>
2017-03-23kvm: vmx: Flush TLB when the APIC-access address changesJim Mattson1-1/+17
Quoting from the Intel SDM, volume 3, section 28.3.3.4: Guidelines for Use of the INVEPT Instruction: If EPT was in use on a logical processor at one time with EPTP X, it is recommended that software use the INVEPT instruction with the "single-context" INVEPT type and with EPTP X in the INVEPT descriptor before a VM entry on the same logical processor that enables EPT with EPTP X and either (a) the "virtualize APIC accesses" VM-execution control was changed from 0 to 1; or (b) the value of the APIC-access address was changed. In the nested case, the burden falls on L1, unless L0 enables EPT in vmcs02 when L1 doesn't enable EPT in vmcs12. Signed-off-by: Jim Mattson <[email protected]> Signed-off-by: Radim Krčmář <[email protected]>
2017-03-23KVM: x86: use pic/ioapic destructor when destroy vmPeter Xu1-2/+2
We have specific destructors for pic/ioapic, we'd better use them when destroying the VM as well. Signed-off-by: Peter Xu <[email protected]> Signed-off-by: Radim Krčmář <[email protected]>
2017-03-23KVM: x86: check existance before destroyPeter Xu2-0/+6
Mostly used for split irqchip mode. In that case, these two things are not inited at all, so no need to release. Signed-off-by: Peter Xu <[email protected]> Signed-off-by: Radim Krčmář <[email protected]>
2017-03-22KVM: s390: gs support for kvm guestsFan Zhang10-4/+191
This patch adds guarded storage support for KVM guest. We need to setup the necessary control blocks, the kvm_run structure for the new registers, the necessary wrappers for VSIE, as well as the machine check save areas. GS is enabled lazily and the register saving and reloading is done in KVM code. As this feature adds new content for migration, we provide a new capability for enablement (KVM_CAP_S390_GS). Signed-off-by: Fan Zhang <[email protected]> Reviewed-by: Christian Borntraeger <[email protected]> Reviewed-by: Janosch Frank <[email protected]> Signed-off-by: Christian Borntraeger <[email protected]>
2017-03-22Merge remote-tracking branch 's390/guarded-storage' into kvms390/nextChristian Borntraeger423-3172/+6454
2017-03-22s390: add a system call for guarded storageMartin Schwidefsky27-46/+436
This adds a new system call to enable the use of guarded storage for user space processes. The system call takes two arguments, a command and pointer to a guarded storage control block: s390_guarded_storage(int command, struct gs_cb *gs_cb); The second argument is relevant only for the GS_SET_BC_CB command. The commands in detail: 0 - GS_ENABLE Enable the guarded storage facility for the current task. The initial content of the guarded storage control block will be all zeros. After the enablement the user space code can use load-guarded-storage-controls instruction (LGSC) to load an arbitrary control block. While a task is enabled the kernel will save and restore the current content of the guarded storage registers on context switch. 1 - GS_DISABLE Disables the use of the guarded storage facility for the current task. The kernel will cease to save and restore the content of the guarded storage registers, the task specific content of these registers is lost. 2 - GS_SET_BC_CB Set a broadcast guarded storage control block. This is called per thread and stores a specific guarded storage control block in the task struct of the current task. This control block will be used for the broadcast event GS_BROADCAST. 3 - GS_CLEAR_BC_CB Clears the broadcast guarded storage control block. The guarded- storage control block is removed from the task struct that was established by GS_SET_BC_CB. 4 - GS_BROADCAST Sends a broadcast to all thread siblings of the current task. Every sibling that has established a broadcast guarded storage control block will load this control block and will be enabled for guarded storage. The broadcast guarded storage control block is used up, a second broadcast without a refresh of the stored control block with GS_SET_BC_CB will not have any effect. Signed-off-by: Martin Schwidefsky <[email protected]>
2017-03-21mm, swap: Remove WARN_ON_ONCE() in free_swap_slot()Huang Ying1-2/+0
Before commit 452b94b8c8c7 ("mm/swap: don't BUG_ON() due to uninitialized swap slot cache"), the following bug is reported, ------------[ cut here ]------------ kernel BUG at mm/swap_slots.c:270! invalid opcode: 0000 [#1] SMP CPU: 5 PID: 1745 Comm: (sd-pam) Not tainted 4.11.0-rc1-00243-g24c534bb161b #1 Hardware name: System manufacturer System Product Name/Z170-K, BIOS 1803 05/06/2016 RIP: 0010:free_swap_slot+0xba/0xd0 Call Trace: swap_free+0x36/0x40 do_swap_page+0x360/0x6d0 __handle_mm_fault+0x880/0x1080 handle_mm_fault+0xd0/0x240 __do_page_fault+0x232/0x4d0 do_page_fault+0x20/0x70 page_fault+0x22/0x30 ---[ end trace aefc9ede53e0ab21 ]--- This is raised by the BUG_ON(!swap_slot_cache_initialized) in free_swap_slot(). This is incorrect, because even if the swap slots cache fails to be initialized, the swap should operate properly without the swap slots cache. And the use_swap_slot_cache check later in the function will protect the uninitialized swap slots cache case. In commit 452b94b8c8c7, the BUG_ON() is replaced by WARN_ON_ONCE(). In the patch, the WARN_ON_ONCE() is removed too. Reported-by: Linus Torvalds <[email protected]> Acked-by: Tim Chen <[email protected]> Cc: Michal Hocko <[email protected]> Signed-off-by: "Huang, Ying" <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2017-03-21Merge tag 'scsi-fixes' of ↵Linus Torvalds12-55/+69
git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi Pull SCSI fixes from James Bottomley: "Nine small fixes: the biggest is probably finally sorting out Kconfig issues with lpfc nvme. There are some performance fixes for megaraid and hpsa and a static checker fix" [ Johannes Thumshirn points out that there still seems to be more lpfc vs nvme config issues. Oh well. - Linus ] * tag 'scsi-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi: scsi: lpfc: Finalize Kconfig options for nvme scsi: ufs: don't check unsigned type for a negative value scsi: hpsa: do not timeout reset operations scsi: hpsa: limit outstanding rescans scsi: hpsa: update check for logical volume status scsi: megaraid_sas: Driver version upgrade scsi: megaraid_sas: raid6 also require cpuSel check same as raid5 scsi: megaraid_sas: add correct return type check for ldio hint logic for raid1 scsi: megaraid_sas: enable intx only if msix request fails
2017-03-21Merge branch 'for-linus' of ↵Linus Torvalds9-7/+71
git://git.kernel.org/pub/scm/linux/kernel/git/jikos/hid Pull HID fixes from Jiri Kosina: - regression fixes for Wacom devices, from Aaron Armstrong Skomra and Ping Cheng - memory leak in hid-sony driver from Roderick Colenbrander - new device IDs support from Oscar Campos and Daniel Drake * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/hid: HID: wacom: generic: Wacom mouse is only provided for opaque tablets HID: corsair: Add driver Scimitar Pro RGB gaming mouse 1b1c:1b3e support to hid-corsair HID: corsair: support for K65-K70 Rapidfire and Scimitar Pro RGB HID: wacom: don't manually release resources for the EKR HID: wacom: Correct Intuos Pro 2 resolution HID: sony: Fix input device leak when connecting a DS4 twice using USB/BT HID: chicony: Add support for another ASUS Zen AiO keyboard
2017-03-21Merge tag 'gpio-v4.11-2' of ↵Linus Torvalds7-56/+84
git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio Pull GPIO fixes from Linus Walleij: "Here is the first set of GPIO fixes for 4.11. It was delayed a bit beacuse I was chicken when linux-next was not rotating last week. This hits the ST serial driver in drivers/tty/serial and that has an ACK from Greg, he suggested to keep the old GPIO fwnode API around to smoothen things in the merge Windod and those have now served their purpose so we take them out and convert the last driver to the new API. Apart from that it's fixes as usual. Summary: - set the parent on the Altera A10SR driver, also fix high level IRQs. - fix error path on the mockup driver. - compilation noise about unused functions fixed. - fix missed interrupts on the MCP23S08 expander, this is also tagged for stable. - retire the interrim helpers devm_get_gpiod_from_child() used to smoothen merging in the merge window" * tag 'gpio-v4.11-2' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio: gpio:mcp23s08 Fixed missing interrupts serial: st-asc: Use new GPIOD API to obtain RTS pin gpio: altera: Use handle_level_irq when configured as a level_high gpio: xgene: mark PM functions as __maybe_unused gpio: mockup: return -EFAULT if copy_from_user() fails gpio: altera-a10sr: Set gpio_chip parent property
2017-03-21Merge tag 'rproc-v4.11-fixes' of git://github.com/andersson/remoteprocLinus Torvalds1-3/+3
Pull remoteproc fix from Bjorn Andersson: "This fixes a Kbuild dependency issue related to the Qualcomm remoteproc drivers" * tag 'rproc-v4.11-fixes' of git://github.com/andersson/remoteproc: remoteproc: qcom: fix QCOM_SMD dependencies
2017-03-21Merge tag 'for-f2fs-4.11-rc4' of ↵Linus Torvalds5-87/+87
git://git.kernel.org/pub/scm/linux/kernel/git/jaegeuk/f2fs Pull f2fs fixes from Jaegeuk Kim: - fix performance regression reported by lkp-rebot - fix potential data lost after power-cut due to SSR reallocation * tag 'for-f2fs-4.11-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/jaegeuk/f2fs: f2fs: combine nat_bits and free_nid_bitmap cache f2fs: skip scanning free nid bitmap of full NAT blocks f2fs: use __set{__clear}_bit_le f2fs: declare static functions f2fs: don't overwrite node block by SSR
2017-03-21KVM: x86: clear bus pointer when destroyedPeter Xu1-1/+11
When releasing the bus, let's clear the bus pointers to mark it out. If any further device unregister happens on this bus, we know that we're done if we found the bus being released already. Signed-off-by: Peter Xu <[email protected]> Signed-off-by: Radim Krčmář <[email protected]>
2017-03-21HID: wacom: generic: Wacom mouse is only provided for opaque tabletsPing Cheng1-2/+4
Commit f85c9dc ("Support tool ID and additional tool types") introduced mouse and lens cursor tools to generic codepath, which covers both display (direct) and opaque tablets (indirect devices). However, mouse and lens cursor tools are only provided for opaque tablets. This patch ignores mouse and lens cursor tools if the device is a display tablet. Signed-off-by: Ping Cheng <[email protected]> Reviewed-by: Jason Gerecke <[email protected]> Signed-off-by: Jiri Kosina <[email protected]>
2017-03-21HID: corsair: Add driver Scimitar Pro RGB gaming mouse 1b1c:1b3e support to ↵Oscar Campos3-0/+49
hid-corsair This mouse sold by Corsair as Scimitar PRO RGB defines two consecutive Logical Minimum items in its Application (Consumer.0001) report making it non parseable. This patch fixes the report descriptor overriding byte 77 in rdesc from 0x16 (Logical Minimum with 16 bits value) to 0x26 (Logical Maximum with 16 bits value). Signed-off-by: Oscar Campos <[email protected]> Signed-off-by: Jiri Kosina <[email protected]>
2017-03-21HID: corsair: support for K65-K70 Rapidfire and Scimitar Pro RGBOscar Campos2-0/+6
Add quirks for several corsair gaming devices to avoid long delays on report initialization Supported devices: - Corsair K65RGB Rapidfire Gaming Keyboard - Corsair K70RGB Rapidfire Gaming Keyboard - Corsair Scimitar Pro RGB Gaming Mouse Signed-off-by: Oscar Campos <[email protected]> Signed-off-by: Jiri Kosina <[email protected]>
2017-03-21HID: wacom: don't manually release resources for the EKRAaron Armstrong Skomra1-1/+3
Commit 5b779fc introduces the manual release of resources in wacom_remove() as an addition to the driver's use of devm. The EKR resources can only be released through wacom_remote_destroy_one() so we skip the manual release for it. Fixes: 5b779fc ("HID: wacom: release the resources before leaving despite devm") Signed-off-by: Aaron Armstrong Skomra <[email protected]> Reviewed-by: Benjamin Tissoires <[email protected]> Signed-off-by: Jiri Kosina <[email protected]>
2017-03-21HID: wacom: Correct Intuos Pro 2 resolutionAaron Armstrong Skomra1-2/+2
The features struct for the second gen Intuos Pro uses the wrong constant for the resolution. This fix is for commit 4922cd2. Fixes: 4922cd2 ("HID: wacom: Support 2nd-gen Intuos Pro's Bluetooth classic interface") Signed-off-by: Aaron Armstrong Skomra <[email protected]> Reviewed-by: Benjamin Tissoires <[email protected]> Signed-off-by: Jiri Kosina <[email protected]>
2017-03-21KVM: s390: Use defines for intercept codeFarhan Ali2-10/+13
Let's use #define values for better readability. Signed-off-by: Farhan Ali <[email protected]> Reviewed-by: Cornelia Huck <[email protected]> Signed-off-by: Christian Borntraeger <[email protected]>
2017-03-21um/arch_prctl: Fix fallout from x86 arch_prctl() reworkKyle Huey1-1/+1
The recent arch_prctl rework added a bracket instead of a comma. Fix it. Fixes: 17a6e1b8e8e8 ("x86/arch_prctl/64: Rename do_arch_prctl() to do_arch_prctl_64()") Signed-off-by: Kyle Huey <[email protected]> Cc: Andy Lutomirski <[email protected]> Cc: [email protected] Link: http://lkml.kernel.org/r/[email protected] Signed-off-by: Thomas Gleixner <[email protected]>
2017-03-20remoteproc: qcom: fix QCOM_SMD dependenciesArnd Bergmann1-3/+3
qcom_smd_register_edge() is provided by either QCOM_SMD or RPMSG_QCOM_SMD, and if both of them are disabled, it does nothing. The check for the PIL drivers however only checks for QCOM_SMD, so it breaks with QCOM_SMD=n && RPMSG_QCOM_SMD=m: drivers/remoteproc/built-in.o: In function `smd_subdev_remove': qcom_wcnss_iris.c:(.text+0x231c): undefined reference to `qcom_smd_unregister_edge' drivers/remoteproc/built-in.o: In function `smd_subdev_probe': qcom_wcnss_iris.c:(.text+0x2344): undefined reference to `qcom_smd_register_edge' drivers/remoteproc/built-in.o: In function `smd_subdev_probe': qcom_q6v5_pil.c:(.text+0x3538): undefined reference to `qcom_smd_register_edge' qcom_q6v5_pil.c:(.text+0x3538): relocation truncated to fit: R_AARCH64_CALL26 against undefined symbol `qcom_smd_register_edge' This clarifies the Kconfig dependency. Fixes: 4b48921a8f74 ("remoteproc: qcom: Use common SMD edge handler") Signed-off-by: Arnd Bergmann <[email protected]> Signed-off-by: Bjorn Andersson <[email protected]>
2017-03-20KVM: Documentation: document MCE ioctlsLuiz Capitulino1-0/+63
Signed-off-by: Luiz Capitulino <[email protected]> Reviewed-by: David Hildenbrand <[email protected]> Signed-off-by: Radim Krčmář <[email protected]>
2017-03-20KVM: nVMX: don't reset kvm mmu twiceWanpeng Li1-2/+0
kvm mmu is reset once successfully loading CR3 as part of emulating vmentry in nested_vmx_load_cr3(). We should not reset kvm mmu twice. Cc: Paolo Bonzini <[email protected]> Cc: Radim Krčmář <[email protected]> Signed-off-by: Wanpeng Li <[email protected]> Signed-off-by: Radim Krčmář <[email protected]>
2017-03-20PTP: fix ptr_ret.cocci warningskbuild test robot1-4/+1
drivers/ptp/ptp_kvm.c:229:1-3: WARNING: PTR_ERR_OR_ZERO can be used Use PTR_ERR_OR_ZERO rather than if(IS_ERR(...)) + PTR_ERR Generated by: scripts/coccinelle/api/ptr_ret.cocci CC: Marcelo Tosatti <[email protected]> Signed-off-by: Fengguang Wu <[email protected]> Signed-off-by: Radim Krčmář <[email protected]>
2017-03-20kvm: fix usage of uninit spinlock in avic_vm_destroy()Dmitry Vyukov1-0/+3
If avic is not enabled, avic_vm_init() does nothing and returns early. However, avic_vm_destroy() still tries to destroy what hasn't been created. The only bad consequence of this now is that avic_vm_destroy() uses svm_vm_data_hash_lock that hasn't been initialized (and is not meant to be used at all if avic is not enabled). Return early from avic_vm_destroy() if avic is not enabled. It has nothing to destroy. Signed-off-by: Dmitry Vyukov <[email protected]> Cc: Joerg Roedel <[email protected]> Cc: Paolo Bonzini <[email protected]> Cc: "Radim Krčmář" <[email protected]> Cc: David Hildenbrand <[email protected]> Cc: [email protected] Cc: [email protected] Reviewed-by: David Hildenbrand <[email protected]> Signed-off-by: Radim Krčmář <[email protected]>
2017-03-20KVM: VMX: downgrade warning on unexpected exit codeRadim Krčmář1-1/+2
We never needed the call trace and we better rate-limit if it can be triggered by a guest. Signed-off-by: Radim Krčmář <[email protected]>
2017-03-20x86/arch_prctl: Add ARCH_[GET|SET]_CPUIDKyle Huey8-13/+109
Intel supports faulting on the CPUID instruction beginning with Ivy Bridge. When enabled, the processor will fault on attempts to execute the CPUID instruction with CPL>0. Exposing this feature to userspace will allow a ptracer to trap and emulate the CPUID instruction. When supported, this feature is controlled by toggling bit 0 of MSR_MISC_FEATURES_ENABLES. It is documented in detail in Section 2.3.2 of https://bugzilla.kernel.org/attachment.cgi?id=243991 Implement a new pair of arch_prctls, available on both x86-32 and x86-64. ARCH_GET_CPUID: Returns the current CPUID state, either 0 if CPUID faulting is enabled (and thus the CPUID instruction is not available) or 1 if CPUID faulting is not enabled. ARCH_SET_CPUID: Set the CPUID state to the second argument. If cpuid_enabled is 0 CPUID faulting will be activated, otherwise it will be deactivated. Returns ENODEV if CPUID faulting is not supported on this system. The state of the CPUID faulting flag is propagated across forks, but reset upon exec. Signed-off-by: Kyle Huey <[email protected]> Cc: Grzegorz Andrejczuk <[email protected]> Cc: [email protected] Cc: Radim Krčmář <[email protected]> Cc: Peter Zijlstra <[email protected]> Cc: Dave Hansen <[email protected]> Cc: Andi Kleen <[email protected]> Cc: [email protected] Cc: Nadav Amit <[email protected]> Cc: Robert O'Callahan <[email protected]> Cc: Richard Weinberger <[email protected]> Cc: "Rafael J. Wysocki" <[email protected]> Cc: Borislav Petkov <[email protected]> Cc: Andy Lutomirski <[email protected]> Cc: Len Brown <[email protected]> Cc: Shuah Khan <[email protected]> Cc: [email protected] Cc: Jeff Dike <[email protected]> Cc: Alexander Viro <[email protected]> Cc: [email protected] Cc: David Matlack <[email protected]> Cc: Boris Ostrovsky <[email protected]> Cc: Dmitry Safonov <[email protected]> Cc: [email protected] Cc: Paolo Bonzini <[email protected]> Link: http://lkml.kernel.org/r/[email protected] Signed-off-by: Thomas Gleixner <[email protected]>
2017-03-20x86/cpufeature: Detect CPUID faulting supportKyle Huey3-1/+26
Intel supports faulting on the CPUID instruction beginning with Ivy Bridge. When enabled, the processor will fault on attempts to execute the CPUID instruction with CPL>0. This will allow a ptracer to emulate the CPUID instruction. Bit 31 of MSR_PLATFORM_INFO advertises support for this feature. It is documented in detail in Section 2.3.2 of https://bugzilla.kernel.org/attachment.cgi?id=243991 Detect support for this feature and expose it as X86_FEATURE_CPUID_FAULT. Signed-off-by: Kyle Huey <[email protected]> Reviewed-by: Borislav Petkov <[email protected]> Cc: Grzegorz Andrejczuk <[email protected]> Cc: [email protected] Cc: Radim Krčmář <[email protected]> Cc: Peter Zijlstra <[email protected]> Cc: Dave Hansen <[email protected]> Cc: Andi Kleen <[email protected]> Cc: [email protected] Cc: Nadav Amit <[email protected]> Cc: Robert O'Callahan <[email protected]> Cc: Richard Weinberger <[email protected]> Cc: "Rafael J. Wysocki" <[email protected]> Cc: Andy Lutomirski <[email protected]> Cc: Len Brown <[email protected]> Cc: Shuah Khan <[email protected]> Cc: [email protected] Cc: Jeff Dike <[email protected]> Cc: Alexander Viro <[email protected]> Cc: [email protected] Cc: David Matlack <[email protected]> Cc: Boris Ostrovsky <[email protected]> Cc: Dmitry Safonov <[email protected]> Cc: [email protected] Cc: Paolo Bonzini <[email protected]> Link: http://lkml.kernel.org/r/[email protected] Signed-off-by: Thomas Gleixner <[email protected]>
2017-03-20x86/syscalls/32: Wire up arch_prctl on x86-32Kyle Huey6-1/+25
Hook up arch_prctl to call do_arch_prctl() on x86-32, and in 32 bit compat mode on x86-64. This allows to have arch_prctls that are not specific to 64 bits. On UML, simply stub out this syscall. Signed-off-by: Kyle Huey <[email protected]> Cc: Grzegorz Andrejczuk <[email protected]> Cc: [email protected] Cc: Radim Krčmář <[email protected]> Cc: Peter Zijlstra <[email protected]> Cc: Dave Hansen <[email protected]> Cc: Andi Kleen <[email protected]> Cc: [email protected] Cc: Nadav Amit <[email protected]> Cc: Robert O'Callahan <[email protected]> Cc: Richard Weinberger <[email protected]> Cc: "Rafael J. Wysocki" <[email protected]> Cc: Borislav Petkov <[email protected]> Cc: Andy Lutomirski <[email protected]> Cc: Len Brown <[email protected]> Cc: Shuah Khan <[email protected]> Cc: [email protected] Cc: Jeff Dike <[email protected]> Cc: Alexander Viro <[email protected]> Cc: [email protected] Cc: David Matlack <[email protected]> Cc: Boris Ostrovsky <[email protected]> Cc: Dmitry Safonov <[email protected]> Cc: [email protected] Cc: Paolo Bonzini <[email protected]> Link: http://lkml.kernel.org/r/[email protected] Signed-off-by: Thomas Gleixner <[email protected]>
2017-03-20x86/arch_prctl: Add do_arch_prctl_common()Kyle Huey3-1/+16
Add do_arch_prctl_common() to handle arch_prctls that are not specific to 64 bit mode. Call it from the syscall entry point, but not any of the other callsites in the kernel, which all want one of the existing 64 bit only arch_prctls. Signed-off-by: Kyle Huey <[email protected]> Cc: Grzegorz Andrejczuk <[email protected]> Cc: [email protected] Cc: Radim Krčmář <[email protected]> Cc: Peter Zijlstra <[email protected]> Cc: Dave Hansen <[email protected]> Cc: Andi Kleen <[email protected]> Cc: [email protected] Cc: Nadav Amit <[email protected]> Cc: Robert O'Callahan <[email protected]> Cc: Richard Weinberger <[email protected]> Cc: "Rafael J. Wysocki" <[email protected]> Cc: Borislav Petkov <[email protected]> Cc: Andy Lutomirski <[email protected]> Cc: Len Brown <[email protected]> Cc: Shuah Khan <[email protected]> Cc: [email protected] Cc: Jeff Dike <[email protected]> Cc: Alexander Viro <[email protected]> Cc: [email protected] Cc: David Matlack <[email protected]> Cc: Boris Ostrovsky <[email protected]> Cc: Dmitry Safonov <[email protected]> Cc: [email protected] Cc: Paolo Bonzini <[email protected]> Link: http://lkml.kernel.org/r/[email protected] Signed-off-by: Thomas Gleixner <[email protected]>
2017-03-20x86/arch_prctl/64: Rename do_arch_prctl() to do_arch_prctl_64()Kyle Huey6-31/+32
In order to introduce new arch_prctls that are not 64 bit only, rename the existing 64 bit implementation to do_arch_prctl_64(). Also rename the second argument of that function from 'addr' to 'arg2', because it will no longer always be an address. Signed-off-by: Kyle Huey <[email protected]> Reviewed-by: Andy Lutomirski <[email protected]> Cc: Grzegorz Andrejczuk <[email protected]> Cc: [email protected] Cc: Radim Krčmář <[email protected]> Cc: Peter Zijlstra <[email protected]> Cc: Dave Hansen <[email protected]> Cc: Andi Kleen <[email protected]> Cc: [email protected] Cc: Nadav Amit <[email protected]> Cc: Robert O'Callahan <[email protected]> Cc: Richard Weinberger <[email protected]> Cc: "Rafael J. Wysocki" <[email protected]> Cc: Borislav Petkov <[email protected]> Cc: Len Brown <[email protected]> Cc: Shuah Khan <[email protected]> Cc: [email protected] Cc: Jeff Dike <[email protected]> Cc: Alexander Viro <[email protected]> Cc: [email protected] Cc: David Matlack <[email protected]> Cc: Boris Ostrovsky <[email protected]> Cc: Dmitry Safonov <[email protected]> Cc: [email protected] Cc: Paolo Bonzini <[email protected]> Link: http://lkml.kernel.org/r/[email protected] Signed-off-by: Thomas Gleixner <[email protected]>
2017-03-20x86/arch_prctl/64: Use SYSCALL_DEFINE2 to define sys_arch_prctl()Kyle Huey2-2/+4
Use the SYSCALL_DEFINE2 macro instead of manually defining it. Signed-off-by: Kyle Huey <[email protected]> Cc: Grzegorz Andrejczuk <[email protected]> Cc: [email protected] Cc: Radim Krčmář <[email protected]> Cc: Peter Zijlstra <[email protected]> Cc: Dave Hansen <[email protected]> Cc: Andi Kleen <[email protected]> Cc: [email protected] Cc: Nadav Amit <[email protected]> Cc: Robert O'Callahan <[email protected]> Cc: Richard Weinberger <[email protected]> Cc: "Rafael J. Wysocki" <[email protected]> Cc: Borislav Petkov <[email protected]> Cc: Andy Lutomirski <[email protected]> Cc: Len Brown <[email protected]> Cc: Shuah Khan <[email protected]> Cc: [email protected] Cc: Jeff Dike <[email protected]> Cc: Alexander Viro <[email protected]> Cc: [email protected] Cc: David Matlack <[email protected]> Cc: Boris Ostrovsky <[email protected]> Cc: Dmitry Safonov <[email protected]> Cc: [email protected] Cc: Paolo Bonzini <[email protected]> Link: http://lkml.kernel.org/r/[email protected] Signed-off-by: Thomas Gleixner <[email protected]>
2017-03-20x86/arch_prctl: Rename 'code' argument to 'option'Kyle Huey6-16/+17
The x86 specific arch_prctl() arbitrarily changed prctl's 'option' to 'code'. Before adding new options, rename it. Signed-off-by: Kyle Huey <[email protected]> Cc: Grzegorz Andrejczuk <[email protected]> Cc: [email protected] Cc: Radim Krčmář <[email protected]> Cc: Peter Zijlstra <[email protected]> Cc: Dave Hansen <[email protected]> Cc: Andi Kleen <[email protected]> Cc: [email protected] Cc: Nadav Amit <[email protected]> Cc: Robert O'Callahan <[email protected]> Cc: Richard Weinberger <[email protected]> Cc: "Rafael J. Wysocki" <[email protected]> Cc: Borislav Petkov <[email protected]> Cc: Andy Lutomirski <[email protected]> Cc: Len Brown <[email protected]> Cc: Shuah Khan <[email protected]> Cc: [email protected] Cc: Jeff Dike <[email protected]> Cc: Alexander Viro <[email protected]> Cc: [email protected] Cc: David Matlack <[email protected]> Cc: Boris Ostrovsky <[email protected]> Cc: Dmitry Safonov <[email protected]> Cc: [email protected] Cc: Paolo Bonzini <[email protected]> Link: http://lkml.kernel.org/r/[email protected] Signed-off-by: Thomas Gleixner <[email protected]>
2017-03-20x86/msr: Rename MISC_FEATURE_ENABLES to MISC_FEATURES_ENABLESKyle Huey2-7/+7
This matches the only public Intel documentation of this MSR, in the "Virtualization Technology FlexMigration Application Note" (preserved at https://bugzilla.kernel.org/attachment.cgi?id=243991) Signed-off-by: Kyle Huey <[email protected]> Cc: Grzegorz Andrejczuk <[email protected]> Cc: [email protected] Cc: Radim Krčmář <[email protected]> Cc: Peter Zijlstra <[email protected]> Cc: Dave Hansen <[email protected]> Cc: Andi Kleen <[email protected]> Cc: [email protected] Cc: Nadav Amit <[email protected]> Cc: Robert O'Callahan <[email protected]> Cc: Richard Weinberger <[email protected]> Cc: "Rafael J. Wysocki" <[email protected]> Cc: Borislav Petkov <[email protected]> Cc: Andy Lutomirski <[email protected]> Cc: Len Brown <[email protected]> Cc: Shuah Khan <[email protected]> Cc: [email protected] Cc: Jeff Dike <[email protected]> Cc: Alexander Viro <[email protected]> Cc: [email protected] Cc: David Matlack <[email protected]> Cc: Boris Ostrovsky <[email protected]> Cc: Dmitry Safonov <[email protected]> Cc: [email protected] Cc: Paolo Bonzini <[email protected]> Link: http://lkml.kernel.org/r/[email protected] Signed-off-by: Thomas Gleixner <[email protected]>
2017-03-20f2fs: combine nat_bits and free_nid_bitmap cacheChao Yu1-78/+47
Both nat_bits cache and free_nid_bitmap cache provide same functionality as a intermediate cache between free nid cache and disk, but with different granularity of indicating free nid range, and different persistence policy. nat_bits cache provides better persistence ability, and free_nid_bitmap provides better granularity. In this patch we combine advantage of both caches, so finally policy of the intermediate cache would be: - init: load free nid status from nat_bits into free_nid_bitmap - lookup: scan free_nid_bitmap before load NAT blocks - update: update free_nid_bitmap in real-time - persistence: udpate and persist nat_bits in checkpoint This patch also resolves performance regression reported by lkp-robot. commit: 4ac912427c4214d8031d9ad6fbc3bc75e71512df ("f2fs: introduce free nid bitmap") d00030cf9cd0bb96fdccc41e33d3c91dcbb672ba ("f2fs: use __set{__clear}_bit_le") 1382c0f3f9d3f936c8bc42ed1591cf7a593ef9f7 ("f2fs: combine nat_bits and free_nid_bitmap cache") 4ac912427c4214d8 d00030cf9cd0bb96fdccc41e33 1382c0f3f9d3f936c8bc42ed15 ---------------- -------------------------- -------------------------- %stddev %change %stddev %change %stddev \ | \ | \ 77863 ± 0% +2.1% 79485 ± 1% +50.8% 117404 ± 0% aim7.jobs-per-min 231.63 ± 0% -2.0% 227.01 ± 1% -33.6% 153.80 ± 0% aim7.time.elapsed_time 231.63 ± 0% -2.0% 227.01 ± 1% -33.6% 153.80 ± 0% aim7.time.elapsed_time.max 896604 ± 0% -0.8% 889221 ± 3% -20.2% 715260 ± 1% aim7.time.involuntary_context_switches 2394 ± 1% +4.6% 2503 ± 1% +3.7% 2481 ± 2% aim7.time.maximum_resident_set_size 6240 ± 0% -1.5% 6145 ± 1% -14.1% 5360 ± 1% aim7.time.system_time 1111357 ± 3% +1.9% 1132509 ± 2% -6.2% 1041932 ± 2% aim7.time.voluntary_context_switches ... Signed-off-by: Chao Yu <[email protected]> Tested-by: Xiaolong Ye <[email protected]> Signed-off-by: Jaegeuk Kim <[email protected]>
2017-03-20f2fs: skip scanning free nid bitmap of full NAT blocksChao Yu3-6/+30
This patch adds to account free nids for each NAT blocks, and while scanning all free nid bitmap, do check count and skip lookuping in full NAT block. Signed-off-by: Chao Yu <[email protected]> Signed-off-by: Jaegeuk Kim <[email protected]>
2017-03-20f2fs: use __set{__clear}_bit_leJaegeuk Kim2-10/+10
This patch uses __set{__clear}_bit_le for highter speed. Reviewed-by: Chao Yu <[email protected]> Signed-off-by: Jaegeuk Kim <[email protected]>
2017-03-20f2fs: declare static functionsJaegeuk Kim1-3/+4
This is to avoid build warning reported by kbuild test robot. Signed-off-by: Fengguang Wu <[email protected]> Signed-off-by: Jaegeuk Kim <[email protected]>
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