- 03 Aug, 2015 2 commits
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Christian Borntraeger authored
Right now we use the address of the sie control block as tag for the sampling data. This is hard to get for users. Let's just use the PID of the cpu thread to mark the hardware samples. Reviewed-by:
David Hildenbrand <dahi@linux.vnet.ibm.com> Signed-off-by:
Christian Borntraeger <borntraeger@de.ibm.com> Signed-off-by:
Martin Schwidefsky <schwidefsky@de.ibm.com>
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Hendrik Brueckner authored
All calls to save_fpu_regs() specify the fpu structure of the current task pointer as parameter. The task pointer of the current task can also be retrieved from the CPU lowcore directly. Remove the parameter definition, load the __LC_CURRENT task pointer from the CPU lowcore, and rebase the FPU structure onto the task structure. Apply the same approach for the load_fpu_regs() function. Reviewed-by:
Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by:
Hendrik Brueckner <brueckner@linux.vnet.ibm.com> Signed-off-by:
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- 29 Jul, 2015 6 commits
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Sebastian Ott authored
Make sure that we use the pci_rescan_remove_lock when we remove or add functions from/to the bus. Reviewed-by:
Gerald Schaefer <gerald.schaefer@de.ibm.com> Signed-off-by:
Sebastian Ott <sebott@linux.vnet.ibm.com> Signed-off-by:
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Sebastian Ott authored
Receiving error events for a pci function that's currently not in use will crash the kernel. For example the procedure for FW upgrades might include: * remove the function from Linux * apply FW upgrade * rescan for new functions Receiving an event during the FW upgrade will result in a use after free when printing the functions name. Just print "n/a" in such cases. Reviewed-by:
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Sebastian Ott authored
Free bus resources when the allocation/registration of the bus failed. Reviewed-by:
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Heiko Carstens authored
The public mailing lists and personal email addresses are sufficient. No need for an extra generic email address. Cc: Christian Borntraeger <borntraeger@de.ibm.com> Acked-by:
Cornelia Huck <cornelia.huck@de.ibm.com> Cc: Martin Schwidefsky <schwidefsky@de.ibm.com> Cc: Ursula Braun <ursula.braun@de.ibm.com> Cc: Ingo Tuchscherer <ingo.tuchscherer@de.ibm.com> Cc: Steffen Maier <maier@linux.vnet.ibm.com> Signed-off-by:
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Heiko Carstens authored
Section mismatch in reference from the function __smp_store_cpu_state() to the function .init.text:memblock_alloc() The function __smp_store_cpu_state() references the function __init memblock_alloc(). Reviewed-by:
Michael Holzheu <holzheu@linux.vnet.ibm.com> Signed-off-by:
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Martin Schwidefsky authored
The 31-bit assembler code for the early sclp console is error prone as git commit fde24b54d976cc123506695c17db01438a11b673 "s390/sclp: clear upper register halves in _sclp_print_early" has shown. Convert the assembler code to C. Signed-off-by:
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- 22 Jul, 2015 18 commits
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Peter Oberparleiter authored
A hardware problem on a FICON link is reported by the Channel Subsystem to the operating system via a Link Incident Record (LIR). In response, the operating system should issue a message that enables hardware service personnel to identify and repair the failing component. Current Linux LIR handling is broken because LIR data is incorrectly interpreted and no log message is generated. This patch fixes Linux LIR handling by implementing a new log message for LIRs indicating a degraded or non-operational link. Also LIRs are no longer used to deactivate channel paths because the available data does not reliably allow to determine the affected channel path. Signed-off-by:
Peter Oberparleiter <oberpar@linux.vnet.ibm.com> Reviewed-by:
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Peter Oberparleiter authored
After dutifully acting as statement separator for 6 long years, this comma has finally grown into a full semicolon. Signed-off-by:
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Peter Oberparleiter authored
Dropping kernel messages during a console-buffer-full condition is preferable to halting the system until console messages are delivered, especially for production systems. Update default for sclp_console_drop kernel parameter accordingly. Signed-off-by:
Peter Oberparleiter <peter.oberparleiter@linux.vnet.ibm.com> Acked-by:
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Sebastian Ott authored
Inline get_zdev to save ~200 bytes of kernel text for CONFIG_PCI=y. Also rename the function to to_zpci to make clear that we don't do reference counting here. Signed-off-by:
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Martin Schwidefsky authored
If a machine checks is received while the CPU is in the kernel, only the s390_do_machine_check function will be called. The call to s390_handle_mcck is postponed until the CPU returns to user space. Because of this it is safe to use the asynchronous stack for machine checks even if the CPU is already handling an interrupt. Signed-off-by: -
Martin Schwidefsky authored
Reorder the instructions of UPDATE_VTIME to improve superscalar execution, remove duplicate checks for problem-state from the asynchronous interrupt handlers, and move the check for problem-state from the synchronous exit path to the program check path as it is only needed for program checks inside the kernel. Signed-off-by: -
Martin Schwidefsky authored
Currently there are two mechanisms to deal with cleanup work due to interrupts. The HANDLE_SIE_INTERCEPT macro is used to undo the changes required to enter SIE in sie64a. If the SIE instruction causes a program check, or an asynchronous interrupt is received the HANDLE_SIE_INTERCEPT code forwards the program execution to sie_exit. All the other critical sections in entry.S are handled by the code in cleanup_critical that is called by the SWITCH_ASYNC macro. Move the sie64a function to the beginning of the critical section and add the code from HANDLE_SIE_INTERCEPT to cleanup_critical. Add a special case for the sie64a cleanup to the program check handler. Signed-off-by: -
Martin Schwidefsky authored
The HANDLE_SIE_INTERCEPT macro is used in the interrupt handlers and the program check handler to undo a few changes done by sie64a. Among them are guest vs host LPP, the gmap ASCE vs kernel ASCE and the bit that indicates that SIE is currently running on the CPU. There is a race of a voluntary SIE exit vs asynchronous interrupts. If the CPU completed the SIE instruction and the TM instruction of the LPP macro at the time it receives an interrupt, the interrupt handler will run while the LPP, the ASCE and the SIE bit are still set up for guest execution. This might result in wrong sampling data, but it will not cause data corruption or lockups. The critical section in sie64a needs to be enlarged to include all instructions that undo the changes required for guest execution. Signed-off-by: -
Hendrik Brueckner authored
Use the module_cpu_feature_match() module init function to add an module alias based on required CPU features. The modules are automatically loaded on hardware that supports the required CPU features. Signed-off-by:
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Hendrik Brueckner authored
Add support for the generic CPU feature modalias implementation that wires up optional CPU features to udev-based module autoprobing. The <asm/cpufeature.h> file provides definitions to map CPU features to s390 ELF hardware capabilities. Signed-off-by:
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Hendrik Brueckner authored
A section mismatch warning is reported if an __init annotated function is specified for module_cpu_feature_match(). Change the module_cpu_feature_match() function and annotate the generated cpu_feature_match_* function as __init. Signed-off-by:
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Hendrik Brueckner authored
Improve the save and restore behavior of FPU register contents to use the vector extension within the kernel. The kernel does not use floating-point or vector registers and, therefore, saving and restoring the FPU register contents are performed for handling signals or switching processes only. To prepare for using vector instructions and vector registers within the kernel, enhance the save behavior and implement a lazy restore at return to user space from a system call or interrupt. To implement the lazy restore, the save_fpu_regs() sets a CPU information flag, CIF_FPU, to indicate that the FPU registers must be restored. Saving and setting CIF_FPU is performed in an atomic fashion to be interrupt-safe. When the kernel wants to use the vector extension or wants to change the FPU register state for a task during signal handling, the save_fpu_regs() must be called first. The CIF_FPU flag is also set at process switch. At return to user space, the FPU state is restored. In particular, the FPU state includes the floating-point or vector register contents, as well as, vector-enablement and floating-point control. The FPU state restore and clearing CIF_FPU is also performed in an atomic fashion. For KVM, the restore of the FPU register state is performed when restoring the general-purpose guest registers before the SIE instructions is started. Because the path towards the SIE instruction is interruptible, the CIF_FPU flag must be checked again right before going into SIE. If set, the guest registers must be reloaded again by re-entering the outer SIE loop. This is the same behavior as if the SIE critical section is interrupted. Signed-off-by:
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Hendrik Brueckner authored
Older binutils versions do not include support for the vector instruction formats. Add assembler macros for vector instruction mnemonics to easily encode and generate vector instructions. Signed-off-by:
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Hendrik Brueckner authored
Make the floating-point save area dynamically allocated and uses a flag to distinguish whether a task uses floating-point or vector registers. Signed-off-by:
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Hendrik Brueckner authored
Introduce a new structure to manage FP and VX registers. Refactor the save and restore of floating point and vector registers with a set of helper functions in fpu-internal.h. Signed-off-by:
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Hendrik Brueckner authored
The kvm_arch_vcpu_load() does not validate whether the floating-point control (FPC) is valid. Further, the return code of the restore is not checked too. If the FPC is invalid, the restore fails and the host FPC value might remain. The correct behavior would be to clear the FPC if it is not valid. Hence, validate the FPC value and, optionally, reset the value before restoring it. Reviewed-by:
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Hendrik Brueckner authored
Use the test_fp_ctl() to test the floating-point control word for validity and use restore_fp_ctl() to set it in load_sigregs. Signed-off-by:
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Hendrik Brueckner authored
Move the EX_TABLE macro definitions from the processor.h to the linkage.h header file. It helps to reduce circular header file dependencies. Signed-off-by:
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- 20 Jul, 2015 1 commit
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Martin Schwidefsky authored
git commit 0c8c0f03 "x86/fpu, sched: Dynamically allocate 'struct fpu'" moved the thread_struct to the end of the task_struct. This causes some of the offsets used in entry.S to overflow their instruction operand field. To fix this use aghi to create a dedicated pointer for the thread_struct. Signed-off-by:
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- 19 Jul, 2015 8 commits
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Linus Torvalds authored
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git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsiLinus Torvalds authored
Pull SCSI fixes from James Bottomley: "Two fairly simple fixes: one is a change that causes us to have a very low queue depth leading to performance issues and the other is a null deref occasionally in tapes thanks to use after put" * tag 'scsi-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi: scsi: fix host max depth checking for the 'queue_depth' sysfs interface st: null pointer dereference panic caused by use after kref_put by st_open
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git://git.linux-mips.org/pub/scm/ralf/upstream-linusLinus Torvalds authored
Pull MIPS fixes from Ralf Baechle: "Another round of MIPS fixes for 4.2. Things are looking quite decent at this stage but the recent work on the FPU support took its toll: - fix an incorrect overly restrictive ifdef - select O32 64-bit FP support for O32 binary compatibility - remove workarounds for Sibyte SB1250 Pass1 parts. There are rare fixing the workarounds is not worth the effort. - patch up an outdated and now incorrect comment" * 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus: MIPS: fpu.h: Allow 64-bit FPU on a 64-bit MIPS R6 CPU MIPS: SB1: Remove support for Pass 1 parts. MIPS: Require O32 FP64 support for MIPS64 with O32 compat MIPS: asm-offset.c: Patch up various comments refering to the old filename. -
git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linuxLinus Torvalds authored
Pull parisc fix from Helge Deller: "A memory leak fix from Christophe Jaillet which was introduced with kernel 4.0 and which leads to kernel crashes on parisc after 1-3 days" * 'parisc-4.2-2' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux: parisc: mm: Fix a memory leak related to pmd not attached to the pgd
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git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-socLinus Torvalds authored
Pull ARM SoC fixes from Olof Johansson: "By far most of the fixes here are updates to DTS files to deal with some mostly minor bugs. There's also a fix to deal with non-PM kernel configs on i.MX, a regression fix for ethernet on PXA platforms and a dependency fix for OMAP" * tag 'armsoc-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: ARM: keystone: dts: rename pcie nodes to help override status ARM: keystone: dts: fix dt bindings for PCIe ARM: pxa: fix dm9000 platform data regression ARM: dts: Correct audio input route & set mic bias for am335x-pepper ARM: OMAP2+: Add HAVE_ARM_SCU for AM43XX MAINTAINERS: digicolor: add dts files ARM: ux500: fix MMC/SD card regression ARM: ux500: define serial port aliases ARM: dts: OMAP5: Add #iommu-cells property to IOMMUs ARM: dts: OMAP4: Add #iommu-cells property to IOMMUs ARM: dts: Fix frequency scaling on Gumstix Pepper ARM: dts: configure regulators for Gumstix Pepper ARM: dts: omap3: overo: Update LCD panel names ARM: dts: cros-ec-keyboard: Add support for some Japanese keys ARM: imx6: gpc: always enable PU domain if CONFIG_PM is not set ARM: dts: imx53-qsb: fix TVE entry ARM: dts: mx23: fix iio-hwmon support ARM: dts: imx27: Adjust the GPT compatible string ARM: socfpga: dts: Fix entries order ARM: socfpga: dts: Fix adxl34x formating and compatible string
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Markos Chandras authored
Commit 6134d949 ("MIPS: asm: fpu: Allow 64-bit FPU on MIPS32 R6") added support for 64-bit FPU on a 32-bit MIPS R6 processor but it missed the 64-bit CPU case leading to FPU failures when requesting FR=1 mode (which is always the case for MIPS R6 userland) when running a 32-bit kernel on a 64-bit CPU. We also fix the MIPS R2 case. Signed-off-by:
Markos Chandras <markos.chandras@imgtec.com> Fixes: 6134d949 ("MIPS: asm: fpu: Allow 64-bit FPU on MIPS32 R6") Reviewed-by:
Paul Burton <paul.burton@imgtec.com> Cc: <stable@vger.kernel.org> # 4.0+ Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/10734/Signed-off-by:
Ralf Baechle <ralf@linux-mips.org>
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Christophe Jaillet authored
Commit 0e0da48d ("parisc: mm: don't count preallocated pmds") introduced a memory leak. After this commit, the 'return' statement in pmd_free is executed in all cases. Even for pmd that are not attached to the pgd. So 'free_pages' can never be called anymore, leading to a memory leak. Signed-off-by:
Christophe JAILLET <christophe.jaillet@wanadoo.fr> Acked-by:
Kirill A. Shutemov <kirill.shutemov@linux.intel.com> Acked-by:
Mikulas Patocka <mpatocka@redhat.com> Acked-by:
Helge Deller <deller@gmx.de> Cc: stable@vger.kernel.org # v4.0+ Signed-off-by:
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https://github.com/rjarzmik/linuxOlof Johansson authored
Merge "pxa fixes for v4.2" from Robert Jarzmik: ARM: pxa: fixes for v4.2-rc2 This single fix reenables ethernet cards for several pxa boards, broken by regulator addition to dm9000 driver. * tag 'pxa-fixes-v4.2-rc2' of https://github.com/rjarzmik/linux: ARM: pxa: fix dm9000 platform data regression
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- 18 Jul, 2015 5 commits
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git://ftp.arm.linux.org.uk/~rmk/linux-armLinus Torvalds authored
Pull ARM fixes from Russell King: "A small set of ARM fixes for -rc3, most of them not far off one-liners, with the exception of fixing the V7 cache invalidation for incoming SMP processors which was causing problems for SoCFPGA devices" * 'fixes' of git://ftp.arm.linux.org.uk/~rmk/linux-arm: ARM: fix __virt_to_idmap build error on !MMU ARM: invalidate L1 before enabling coherency ARM: 8404/1: dma-mapping: fix off-by-one error in bitmap size check ARM: 8402/1: perf: Don't use of_node after putting it ARM: 8400/1: use virt_to_idmap to get phys_reset address
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git://git.kernel.org/pub/scm/linux/kernel/git/tip/tipLinus Torvalds authored
Pull x86 fixes from Ingo Molnar: "Two families of fixes: - Fix an FPU context related boot crash on newer x86 hardware with larger context sizes than what most people test. To fix this without ugly kludges or extensive reverts we had to touch core task allocator, to allow x86 to determine the task size dynamically, at boot time. I've tested it on a number of x86 platforms, and I cross-built it to a handful of architectures: (warns) (warns) testing x86-64: -git: pass ( 0), -tip: pass ( 0) testing x86-32: -git: pass ( 0), -tip: pass ( 0) testing arm: -git: pass ( 1359), -tip: pass ( 1359) testing cris: -git: pass ( 1031), -tip: pass ( 1031) testing m32r: -git: pass ( 1135), -tip: pass ( 1135) testing m68k: -git: pass ( 1471), -tip: pass ( 1471) testing mips: -git: pass ( 1162), -tip: pass ( 1162) testing mn10300: -git: pass ( 1058), -tip: pass ( 1058) testing parisc: -git: pass ( 1846), -tip: pass ( 1846) testing sparc: -git: pass ( 1185), -tip: pass ( 1185) ... so I hope the cross-arch impact 'none', as intended. (by Dave Hansen) - Fix various NMI handling related bugs unearthed by the big asm code rewrite and generally make the NMI code more robust and more maintainable while at it. These changes are a bit late in the cycle, I hope they are still acceptable. (by Andy Lutomirski)" * 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: x86/fpu, sched: Introduce CONFIG_ARCH_WANTS_DYNAMIC_TASK_STRUCT and use it on x86 x86/fpu, sched: Dynamically allocate 'struct fpu' x86/entry/64, x86/nmi/64: Add CONFIG_DEBUG_ENTRY NMI testing code x86/nmi/64: Make the "NMI executing" variable more consistent x86/nmi/64: Minor asm simplification x86/nmi/64: Use DF to avoid userspace RSP confusing nested NMI detection x86/nmi/64: Reorder nested NMI checks x86/nmi/64: Improve nested NMI comments x86/nmi/64: Switch stacks on userspace NMI entry x86/nmi/64: Remove asm code that saves CR2 x86/nmi: Enable nested do_nmi() handling for 64-bit kernels -
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tipLinus Torvalds authored
Pull timer fix from Ingo Molnar: "Fix for a misplaced export that can cause build failures in certain (rare) Kconfig situations" * 'timers-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: tick: Move the export of tick_broadcast_oneshot_control to the proper place
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git://git.kernel.org/pub/scm/linux/kernel/git/tip/tipLinus Torvalds authored
Pull scheduler fix from Ingo Molnar: "A oneliner rq throttling fix" * 'sched-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: sched/fair: Test list head instead of list entry in throttle_cfs_rq()
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git://git.kernel.org/pub/scm/linux/kernel/git/tip/tipLinus Torvalds authored
Pull perf fixes from Ingo Molnar: "Mostly tooling fixes, plus a static key fix fixing /sys/devices/cpu/rdpmc" * 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: perf tools: Really allow to specify custom CC, AR or LD perf auxtrace: Fix misplaced check for HAVE_SYNC_COMPARE_AND_SWAP_SUPPORT perf hists browser: Take the --comm, --dsos, etc filters into account perf symbols: Store if there is a filter in place x86, perf: Fix static_key bug in load_mm_cr4() tools: Copy lib/hweight.c from the kernel sources perf tools: Fix the detached tarball wrt rbtree copy perf thread_map: Fix the sizeof() calculation for map entries tools lib: Improve clean target perf stat: Fix shadow declaration of close perf tools: Fix lockup using 32-bit compat vdso
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