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2018-01-18BackMerge tag 'v4.15-rc8' into drm-nextDave Airlie15-46/+317
Linux 4.15-rc8 Daniel requested this for so the intel CI won't fall over on drm-next so often.
2018-01-14Merge branch 'x86-pti-for-linus' of ↵Linus Torvalds3-7/+244
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull x86 pti updates from Thomas Gleixner: "This contains: - a PTI bugfix to avoid setting reserved CR3 bits when PCID is disabled. This seems to cause issues on a virtual machine at least and is incorrect according to the AMD manual. - a PTI bugfix which disables the perf BTS facility if PTI is enabled. The BTS AUX buffer is not globally visible and causes the CPU to fault when the mapping disappears on switching CR3 to user space. A full fix which restores BTS on PTI is non trivial and will be worked on. - PTI bugfixes for EFI and trusted boot which make sure that the user space visible page table entries have the NX bit cleared - removal of dead code in the PTI pagetable setup functions - add PTI documentation - add a selftest for vsyscall to verify that the kernel actually implements what it advertises. - a sysfs interface to expose vulnerability and mitigation information so there is a coherent way for users to retrieve the status. - the initial spectre_v2 mitigations, aka retpoline: + The necessary ASM thunk and compiler support + The ASM variants of retpoline and the conversion of affected ASM code + Make LFENCE serializing on AMD so it can be used as speculation trap + The RSB fill after vmexit - initial objtool support for retpoline As I said in the status mail this is the most of the set of patches which should go into 4.15 except two straight forward patches still on hold: - the retpoline add on of LFENCE which waits for ACKs - the RSB fill after context switch Both should be ready to go early next week and with that we'll have covered the major holes of spectre_v2 and go back to normality" * 'x86-pti-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (28 commits) x86,perf: Disable intel_bts when PTI security/Kconfig: Correct the Documentation reference for PTI x86/pti: Fix !PCID and sanitize defines selftests/x86: Add test_vsyscall x86/retpoline: Fill return stack buffer on vmexit x86/retpoline/irq32: Convert assembler indirect jumps x86/retpoline/checksum32: Convert assembler indirect jumps x86/retpoline/xen: Convert Xen hypercall indirect jumps x86/retpoline/hyperv: Convert assembler indirect jumps x86/retpoline/ftrace: Convert ftrace assembler indirect jumps x86/retpoline/entry: Convert entry assembler indirect jumps x86/retpoline/crypto: Convert crypto assembler indirect jumps x86/spectre: Add boot time option to select Spectre v2 mitigation x86/retpoline: Add initial retpoline support objtool: Allow alternatives to be ignored objtool: Detect jumps to retpoline thunks x86/pti: Make unpoison of pgd for trusted boot work for real x86/alternatives: Fix optimize_nops() checking sysfs/cpu: Fix typos in vulnerability documentation x86/cpu/AMD: Use LFENCE_RDTSC in preference to MFENCE_RDTSC ...
2018-01-14Merge tag 'usb-4.15-rc8' of ↵Linus Torvalds1-1/+1
git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb Pull USB fixes from Greg KH: "Here are some small USB fixes and device ids for 4.15-rc8 Nothing major, small fixes for various devices, some resolutions for bugs found by fuzzers, and the usual handful of new device ids. All of these have been in linux-next with no reported issues" * tag 'usb-4.15-rc8' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb: Documentation: usb: fix typo in UVC gadgetfs config command usb: misc: usb3503: make sure reset is low for at least 100us uas: ignore UAS for Norelsys NS1068(X) chips USB: UDC core: fix double-free in usb_add_gadget_udc_release USB: fix usbmon BUG trigger usbip: vudc_tx: fix v_send_ret_submit() vulnerability to null xfer buffer usbip: remove kernel addresses from usb device and urb debug msgs usbip: fix vudc_rx: harden CMD_SUBMIT path to handle malicious input USB: serial: cp210x: add new device ID ELV ALC 8xxx USB: serial: cp210x: add IDs for LifeScan OneTouch Verio IQ
2018-01-14Merge tag 'kbuild-fixes-v4.15' of ↵Linus Torvalds1-8/+15
git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild Pull Kbuild fixes from Masahiro Yamada: - fix cross-compilation for architectures that setup CROSS_COMPILE in their arch Makefile - fix Kconfig rational operators for bool / tristate - drop a gperf-generated file from .gitignore * tag 'kbuild-fixes-v4.15' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild: genksyms: drop *.hash.c from .gitignore kconfig: fix relational operators for bool and tristate symbols kbuild: move cc-option and cc-disable-warning after incl. arch Makefile
2018-01-14Merge tag 'pci-v4.15-fixes-2' of ↵Linus Torvalds1-0/+6
git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci Pull PCI fixes from Bjorn Helgaas: "Fix AMD boot regression due to 64-bit window conflicting with system memory (Christian König)" * tag 'pci-v4.15-fixes-2' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci: x86/PCI: Move and shrink AMD 64-bit window to avoid conflict x86/PCI: Add "pci=big_root_window" option for AMD 64-bit windows
2018-01-13Merge branch 'akpm' (patches from Andrew)Linus Torvalds1-2/+2
Merge misc fixlets from Andrew Morton: "4 fixes" * emailed patches from Andrew Morton <akpm@linux-foundation.org>: tools/objtool/Makefile: don't assume sync-check.sh is executable kdump: write correct address of mem_section into vmcoreinfo kmemleak: allow to coexist with fault injection MAINTAINERS, nilfs2: change project home URLs
2018-01-13MAINTAINERS, nilfs2: change project home URLsRyusuke Konishi1-2/+2
The domain of NILFS project home was changed to "nilfs.sourceforge.io" to enable https access (the previous domain "nilfs.sourceforge.net" is redirected to the new one). Modify URLs of the project home to reflect this change and to replace their protocol from http to https. Link: http://lkml.kernel.org/r/1515416141-5614-1-git-send-email-konishi.ryusuke@lab.ntt.co.jp Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2018-01-12Merge branch 'locking-urgent-for-linus' of ↵Linus Torvalds1-3/+0
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull locking fixes from Ingo Molnar: "No functional effects intended: removes leftovers from recent lockdep and refcounts work" * 'locking-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: locking/refcounts: Remove stale comment from the ARCH_HAS_REFCOUNT Kconfig entry locking/lockdep: Remove cross-release leftovers locking/Documentation: Remove stale crossrelease_fullstack parameter
2018-01-12Merge tag 'drm/tegra/for-4.16-rc1-fixes' of ↵Dave Airlie1-1/+13
git://anongit.freedesktop.org/tegra/linux into drm-next drm/tegra: Changes for v4.16-rc1 The bulk of these changes are preparation work and addition of support for Tegra186. Currently only HDMI output (the primary output on Jetson TX2) is supported, but the hardware is also capable of doing DSI and DisplayPort. Tegra DRM now also uses the atomic commit helpers instead of the open- coded variant that was only doing half its job. As a bit of a byproduct of the Tegra186 support the driver also gained HDMI 2.0 as well as zpos property support. Along the way there are also a few patches to clean up a few things and fix minor issues. * tag 'drm/tegra/for-4.16-rc1-fixes' of git://anongit.freedesktop.org/tegra/linux: (51 commits) drm/tegra: dc: Properly cleanup overlay planes drm/tegra: dc: Fix possible_crtcs mask for planes drm/tegra: dc: Restore YUV overlay support drm/tegra: dc: Implement legacy blending drm/tegra: Correct timeout in tegra_syncpt_wait drm/tegra: gem: Correct iommu_map_sg() error checking drm/tegra: dc: Link DC1 to DC0 on Tegra20 drm/tegra: Fix non-debugfs builds drm/tegra: dpaux: Keep reset defaults for hybrid pad parameters drm/tegra: Mark Tegra186 display hub PM functions __maybe_unused drm/tegra: Use IOMMU groups gpu: host1x: Use IOMMU groups drm/tegra: Implement zpos property drm/tegra: dc: Remove redundant spinlock drm/tegra: dc: Use direct offset to plane registers drm/tegra: dc: Support more formats drm/tegra: fb: Force alpha formats drm/tegra: dpaux: Add Tegra186 support drm/tegra: dpaux: Implement runtime PM drm/tegra: sor: Support HDMI 2.0 modes ...
2018-01-12x86/spectre: Add boot time option to select Spectre v2 mitigationDavid Woodhouse1-0/+28
Add a spectre_v2= option to select the mitigation used for the indirect branch speculation vulnerability. Currently, the only option available is retpoline, in its various forms. This will be expanded to cover the new IBRS/IBPB microcode features. The RETPOLINE_AMD feature relies on a serializing LFENCE for speculation control. For AMD hardware, only set RETPOLINE_AMD if LFENCE is a serializing instruction, which is indicated by the LFENCE_RDTSC feature. [ tglx: Folded back the LFENCE/AMD fixes and reworked it so IBRS integration becomes simple ] Signed-off-by: David Woodhouse <dwmw@amazon.co.uk> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: gnomes@lxorguk.ukuu.org.uk Cc: Rik van Riel <riel@redhat.com> Cc: Andi Kleen <ak@linux.intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: thomas.lendacky@amd.com Cc: Peter Zijlstra <peterz@infradead.org> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Jiri Kosina <jikos@kernel.org> Cc: Andy Lutomirski <luto@amacapital.net> Cc: Dave Hansen <dave.hansen@intel.com> Cc: Kees Cook <keescook@google.com> Cc: Tim Chen <tim.c.chen@linux.intel.com> Cc: Greg Kroah-Hartman <gregkh@linux-foundation.org> Cc: Paul Turner <pjt@google.com> Link: https://lkml.kernel.org/r/1515707194-20531-5-git-send-email-dwmw@amazon.co.uk
2018-01-11Documentation: usb: fix typo in UVC gadgetfs config commandBin Liu1-1/+1
This seems to be a copy&paste error. With the fix the uvc gadget now can be created by following the instrucitons. Signed-off-by: Bin Liu <b-liu@ti.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2018-01-11x86/PCI: Add "pci=big_root_window" option for AMD 64-bit windows=?UTF-8?q?Christian=20K=C3=B6nig?=1-0/+6
Only try to enable a 64-bit window on AMD CPUs when "pci=big_root_window" is specified. This taints the kernel because the new 64-bit window uses address space we don't know anything about, and it may contain unreported devices or memory that would conflict with the window. The pci_amd_enable_64bit_bar() quirk that enables the window is specific to AMD CPUs. The generic solution would be to have the firmware enable the window and describe it in the host bridge's _CRS method, or at least describe it in the _PRS method so the OS would have the option of enabling it. Signed-off-by: Christian König <christian.koenig@amd.com> [bhelgaas: changelog, extend doc, mention taint in dmesg] Signed-off-by: Bjorn Helgaas <helgaas@kernel.org>
2018-01-10doc: clarification about setting SO_ZEROCOPYKornilios Kourtis1-0/+4
Signed-off-by: Kornilios Kourtis <kou@zurich.ibm.com> Acked-by: Willem de Bruijn <willemb@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2018-01-09docs-rst: networking: wire up msg_zerocopyMike Rapoport1-1/+1
Fix the following 'make htmldocs' complaint: Documentation/networking/msg_zerocopy.rst:: WARNING: document isn't included in any toctree. Signed-off-by: Mike Rapoport <rppt@linux.vnet.ibm.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2018-01-09sysfs/cpu: Fix typos in vulnerability documentationDavid Woodhouse1-2/+2
Fixes: 87590ce6e ("sysfs/cpu: Add vulnerability folder") Signed-off-by: David Woodhouse <dwmw@amazon.co.uk> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2018-01-09Merge tag 'drm-misc-next-2018-01-08' of ↵Dave Airlie8-3/+111
git://anongit.freedesktop.org/drm/drm-misc into drm-next drm-misc-next for 4.16: Cross-subsystem Changes: - some dt-binding changes for Ilitek and sun4i devices Core Changes: - panel_orientation_quirks: fix tainted kernel Driver Changes: - panel changes - A83T and LVDS support to sun4i * tag 'drm-misc-next-2018-01-08' of git://anongit.freedesktop.org/drm/drm-misc: drm/panel: lvds: Add support for the power-supply property dt-bindings: panel: lvds: Document power-supply property drm/sun4i: Add A83T support drm/sun4i: Add LVDS support drm/sun4i: Create minimal multipliers and dividers drm/sun4i: Force the mixer rate at 150MHz dt-bindings: display: sun4i-drm: Add A83T pipeline dt-bindings: display: sun4i-drm: Add LVDS properties drm/tinydrm: add driver for ST7735R panels dt-bindings: Add binding for Sitronix ST7735R display panels dt-bindings: add jianda vendor prefix drm/tinydrm: Update ILI9225 compatible string dt-bindings: update compatible string for ILI9225 dt-bindings: Add "vot" vendor prefix drm: fix tainted kernel caused by drm_panel_orientation_quirks.c drm/panel: Add Ilitek ILI9322 driver drm/panel: Add DT bindings for Ilitek ILI9322
2018-01-08locking/Documentation: Remove stale crossrelease_fullstack parameterDavid Sterba1-3/+0
The cross-release lockdep functionality has been removed in: e966eaeeb623: ("locking/lockdep: Remove the cross-release locking checks") ... leaving the kernel parameter docs behind. The code handling the parameter does not exist so this is a plain documentation change. Signed-off-by: David Sterba <dsterba@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: byungchul.park@lge.com Cc: linux-doc@vger.kernel.org Link: http://lkml.kernel.org/r/20180108152731.27613-1-dsterba@suse.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
2018-01-08sysfs/cpu: Add vulnerability folderThomas Gleixner1-0/+16
As the meltdown/spectre problem affects several CPU architectures, it makes sense to have common way to express whether a system is affected by a particular vulnerability or not. If affected the way to express the mitigation should be common as well. Create /sys/devices/system/cpu/vulnerabilities folder and files for meltdown, spectre_v1 and spectre_v2. Allow architectures to override the show function. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Reviewed-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Will Deacon <will.deacon@arm.com> Cc: Dave Hansen <dave.hansen@intel.com> Cc: Linus Torvalds <torvalds@linuxfoundation.org> Cc: Borislav Petkov <bp@alien8.de> Cc: David Woodhouse <dwmw@amazon.co.uk> Link: https://lkml.kernel.org/r/20180107214913.096657732@linutronix.de
2018-01-06x86/Documentation: Add PTI descriptionDave Hansen2-7/+200
Add some details about how PTI works, what some of the downsides are, and how to debug it when things go wrong. Also document the kernel parameter: 'pti/nopti'. Signed-off-by: Dave Hansen <dave.hansen@linux.intel.com> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Randy Dunlap <rdunlap@infradead.org> Reviewed-by: Kees Cook <keescook@chromium.org> Cc: Moritz Lipp <moritz.lipp@iaik.tugraz.at> Cc: Daniel Gruss <daniel.gruss@iaik.tugraz.at> Cc: Michael Schwarz <michael.schwarz@iaik.tugraz.at> Cc: Richard Fellner <richard.fellner@student.tugraz.at> Cc: Andy Lutomirski <luto@kernel.org> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Hugh Dickins <hughd@google.com> Cc: Andi Lutomirsky <luto@kernel.org> Cc: stable@vger.kernel.org Link: https://lkml.kernel.org/r/20180105174436.1BC6FA2B@viggo.jf.intel.com
2018-01-05Merge branch 'x86-pti-for-linus' of ↵Linus Torvalds1-7/+11
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull more x86 pti fixes from Thomas Gleixner: "Another small stash of fixes for fallout from the PTI work: - Fix the modules vs. KASAN breakage which was caused by making MODULES_END depend of the fixmap size. That was done when the cpu entry area moved into the fixmap, but now that we have a separate map space for that this is causing more issues than it solves. - Use the proper cache flush methods for the debugstore buffers as they are mapped/unmapped during runtime and not statically mapped at boot time like the rest of the cpu entry area. - Make the map layout of the cpu_entry_area consistent for 4 and 5 level paging and fix the KASLR vaddr_end wreckage. - Use PER_CPU_EXPORT for per cpu variable and while at it unbreak nvidia gfx drivers by dropping the GPL export. The subject line of the commit tells it the other way around, but I noticed that too late. - Fix the ASM alternative macros so they can be used in the middle of an inline asm block. - Rename the BUG_CPU_INSECURE flag to BUG_CPU_MELTDOWN so the attack vector is properly identified. The Spectre mitigations will come with their own bug bits later" * 'x86-pti-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: x86/pti: Rename BUG_CPU_INSECURE to BUG_CPU_MELTDOWN x86/alternatives: Add missing '\n' at end of ALTERNATIVE inline asm x86/tlb: Drop the _GPL from the cpu_tlbstate export x86/events/intel/ds: Use the proper cache flush method for mapping ds buffers x86/kaslr: Fix the vaddr_end mess x86/mm: Map cpu_entry_area at the same place on 4/5 level x86/mm: Set MODULES_END to 0xffffffffff000000
2018-01-05kconfig: fix relational operators for bool and tristate symbolsNicolas Pitre1-8/+15
Since commit 31847b67bec0 ("kconfig: allow use of relations other than (in)equality") it is possible to use relational operators in Kconfig statements. However, those operators give unexpected results when applied to bool/tristate values: (n < y) = y (correct) (m < y) = y (correct) (n < m) = n (wrong) This happens because relational operators process bool and tristate symbols as strings and m sorts before n. It makes little sense to do a lexicographical compare on bool and tristate values though. Documentation/kbuild/kconfig-language.txt states that expression can have a value of 'n', 'm' or 'y' (or 0, 1, 2 respectively for calculations). Let's make it so for relational comparisons with bool/tristate expressions as well and document them. If at least one symbol is an actual string then the lexicographical compare works just as before. Signed-off-by: Nicolas Pitre <nico@linaro.org> Acked-by: Randy Dunlap <rdunlap@infradead.org> Tested-by: Randy Dunlap <rdunlap@infradead.org> Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
2018-01-05dt-bindings: panel: lvds: Document power-supply propertyMaxime Ripard3-1/+12
The power-supply property is used by a vast majority of panels, including panel-simple. Let's document it as a common property Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Reviewed-by: Rob Herring <robh@kernel.org> Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com> Link: https://patchwork.freedesktop.org/patch/msgid/0a6a3abcf1a6b7f0e66a81af8a44c5c0566ce06c.1513854122.git-series.maxime.ripard@free-electrons.com
2018-01-05x86/kaslr: Fix the vaddr_end messThomas Gleixner1-0/+6
vaddr_end for KASLR is only documented in the KASLR code itself and is adjusted depending on config options. So it's not surprising that a change of the memory layout causes KASLR to have the wrong vaddr_end. This can map arbitrary stuff into other areas causing hard to understand problems. Remove the whole ifdef magic and define the start of the cpu_entry_area to be the end of the KASLR vaddr range. Add documentation to that effect. Fixes: 92a0f81d8957 ("x86/cpu_entry_area: Move it out of the fixmap") Reported-by: Benjamin Gilbert <benjamin.gilbert@coreos.com> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Tested-by: Benjamin Gilbert <benjamin.gilbert@coreos.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: stable <stable@vger.kernel.org> Cc: Dave Hansen <dave.hansen@linux.intel.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Garnier <thgarnie@google.com>, Cc: Alexander Kuleshov <kuleshovmail@gmail.com> Link: https://lkml.kernel.org/r/alpine.DEB.2.20.1801041320360.1771@nanos
2018-01-05x86/mm: Map cpu_entry_area at the same place on 4/5 levelThomas Gleixner1-3/+4
There is no reason for 4 and 5 level pagetables to have a different layout. It just makes determining vaddr_end for KASLR harder than necessary. Fixes: 92a0f81d8957 ("x86/cpu_entry_area: Move it out of the fixmap") Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: Andy Lutomirski <luto@kernel.org> Cc: Benjamin Gilbert <benjamin.gilbert@coreos.com> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: stable <stable@vger.kernel.org> Cc: Dave Hansen <dave.hansen@linux.intel.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Garnier <thgarnie@google.com>, Cc: Alexander Kuleshov <kuleshovmail@gmail.com> Link: https://lkml.kernel.org/r/alpine.DEB.2.20.1801041320360.1771@nanos
2018-01-05x86/mm: Set MODULES_END to 0xffffffffff000000Andrey Ryabinin1-4/+1
Since f06bdd4001c2 ("x86/mm: Adapt MODULES_END based on fixmap section size") kasan_mem_to_shadow(MODULES_END) could be not aligned to a page boundary. So passing page unaligned address to kasan_populate_zero_shadow() have two possible effects: 1) It may leave one page hole in supposed to be populated area. After commit 21506525fb8d ("x86/kasan/64: Teach KASAN about the cpu_entry_area") that hole happens to be in the shadow covering fixmap area and leads to crash: BUG: unable to handle kernel paging request at fffffbffffe8ee04 RIP: 0010:check_memory_region+0x5c/0x190 Call Trace: <NMI> memcpy+0x1f/0x50 ghes_copy_tofrom_phys+0xab/0x180 ghes_read_estatus+0xfb/0x280 ghes_notify_nmi+0x2b2/0x410 nmi_handle+0x115/0x2c0 default_do_nmi+0x57/0x110 do_nmi+0xf8/0x150 end_repeat_nmi+0x1a/0x1e Note, the crash likely disappeared after commit 92a0f81d8957, which changed kasan_populate_zero_shadow() call the way it was before commit 21506525fb8d. 2) Attempt to load module near MODULES_END will fail, because __vmalloc_node_range() called from kasan_module_alloc() will hit the WARN_ON(!pte_none(*pte)) in the vmap_pte_range() and bail out with error. To fix this we need to make kasan_mem_to_shadow(MODULES_END) page aligned which means that MODULES_END should be 8*PAGE_SIZE aligned. The whole point of commit f06bdd4001c2 was to move MODULES_END down if NR_CPUS is big, so the cpu_entry_area takes a lot of space. But since 92a0f81d8957 ("x86/cpu_entry_area: Move it out of the fixmap") the cpu_entry_area is no longer in fixmap, so we could just set MODULES_END to a fixed 8*PAGE_SIZE aligned address. Fixes: f06bdd4001c2 ("x86/mm: Adapt MODULES_END based on fixmap section size") Reported-by: Jakub Kicinski <kubakici@wp.pl> Signed-off-by: Andrey Ryabinin <aryabinin@virtuozzo.com> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: stable@vger.kernel.org Cc: Andy Lutomirski <luto@kernel.org> Cc: Thomas Garnier <thgarnie@google.com> Link: https://lkml.kernel.org/r/20171228160620.23818-1-aryabinin@virtuozzo.com
2018-01-04dt-bindings: display: sun4i-drm: Add A83T pipelineMaxime Ripard1-0/+3
The A83T has two video pipelines in parallel that looks quite similar to the other SoCs. The video planes are handled through a controller called the mixer, and the video signal is then passed to the timing controller (TCON). And while there is two instances of the mixers and TCONs, they have a significant number of differences. The TCONs are quite easy to deal with, one is supposed to generate TV (in the broader term, so including things like HDMI) signals, the other one LCD (so RGB, LVDS, DSI) signals. And while they are called TCON0 and TCON1 in the A83t datasheet, newer SoCs call them TCON-TV and TCON-LCD, which seems more appropriate. However, the mixers differ mostly by their capabilities, with some features being available only in the first one, or the number of planes they expose, but also through their register layout. And while the capabilities could be represented as properties, the register layout differences would need to express all the registers offsets as properties, which is usually quite bad. Especially since documentation on that hardware block is close to non-existent and we don't even have the list of all those registers in the first place. So let's call them mixer 0 and 1 in our compatibles, even though the name is pretty bad... At the moment, we only have tested the code on a board that has a single display output, so we're leaving the tcon-tv and mixer1 out. Reviewed-by: Rob Herring <robh@kernel.org> Reviewed-by: Chen-Yu Tsai <wens@csie.org> Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com> Link: https://patchwork.freedesktop.org/patch/msgid/2702a5c1d224af1c51743492ad1b917966f2ad43.1513854122.git-series.maxime.ripard@free-electrons.com
2018-01-04dt-bindings: display: sun4i-drm: Add LVDS propertiesMaxime Ripard1-0/+8
Some clocks and resets supposed to drive the LVDS logic in the display engine have been overlooked when the driver was first introduced. Add those additional resources to the binding, and we'll deal with the ABI stability in the code. Reviewed-by: Chen-Yu Tsai <wens@csie.org> Reviewed-by: Rob Herring <robh@kernel.org> Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com> Link: https://patchwork.freedesktop.org/patch/msgid/ddbde28fe2e4f21412974e4c69fbfe1c5ff9383f.1513854122.git-series.maxime.ripard@free-electrons.com
2018-01-03dt-bindings: Add binding for Sitronix ST7735R display panelsDavid Lechner1-0/+35
This adds a new device tree binding for Sitronix ST7735R display panels, such as the Adafruit 1.8" TFT. Signed-off-by: David Lechner <david@lechnology.com> Reviewed-by: Rob Herring <robh@kernel.org> Reviewed-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Noralf Trønnes <noralf@tronnes.org> Link: https://patchwork.freedesktop.org/patch/msgid/1514833336-22564-3-git-send-email-david@lechnology.com
2018-01-03dt-bindings: add jianda vendor prefixDavid Lechner1-0/+1
This adds a vendor prefix "jianda" for Jiandangjing Technology Co., Ltd. Signed-off-by: David Lechner <david@lechnology.com> Reviewed-by: Rob Herring <robh@kernel.org> Signed-off-by: Noralf Trønnes <noralf@tronnes.org> Link: https://patchwork.freedesktop.org/patch/msgid/1514833336-22564-2-git-send-email-david@lechnology.com
2018-01-03dt-bindings: update compatible string for ILI9225David Lechner1-2/+2
This updates the compatible string for a no-name LCD panel to "vot,v220hf01a-t", "ilitek,ili9225". The original bindings [1] were the generic "ilitek,ili9225-2.2in-176x220" because I could not find a datasheet. However, after some more research, I finally found one, so the actual vendor and model name are now known. This previous bindings have not made it to the mainline kernel yet, so this is not breaking backwards compatibility. This is also following the precedence of the ILI9322 bindings [2] by using the pattern "vendor,specific-system-config", "vendor,ip-part"; [1]: https://patchwork.ozlabs.org/patch/839352/ [2]: https://patchwork.ozlabs.org/patch/843576/ Signed-off-by: David Lechner <david@lechnology.com> Reviewed-by: Rob Herring <robh@kernel.org> Signed-off-by: Noralf Trønnes <noralf@tronnes.org> Link: https://patchwork.freedesktop.org/patch/msgid/1513881187-3197-3-git-send-email-david@lechnology.com
2018-01-03dt-bindings: Add "vot" vendor prefixDavid Lechner1-0/+1
This adds a vendor prefix "vot" for Vision Optical Technology Co., Ltd. They make LCD displays. Signed-off-by: David Lechner <david@lechnology.com> Reviewed-by: Rob Herring <robh@kernel.org> Signed-off-by: Noralf Trønnes <noralf@tronnes.org> Link: https://patchwork.freedesktop.org/patch/msgid/1513881187-3197-2-git-send-email-david@lechnology.com
2018-01-02docs: fix, intel_guc_loader.c has been moved to intel_guc_fw.cMarkus Heiser1-3/+0
With commit d9e2e0143c the 'GuC-specific firmware loader' doc section was removed from intel_guc_loader.c without a replacement. So lets remove it from the Kernel-doc:: .. kernel-doc:: drivers/gpu/drm/i915/intel_guc_loader.c :doc: GuC-specific firmware loader With commit e8668bbcb0 intel_guc_loader.c was renamed to to intel_guc_fw.c and to name just one, intel_guc_init_hw() was renamed to intel_guc_fw_upload(). Since we get errors in the Sphinx build like: - Error: Cannot open file ./drivers/gpu/drm/i915/intel_guc_loader.c Change the kernel-doc directive from intel_guc_loader.c to intel_guc_fw.c Signed-off-by: Markus Heiser <markus.heiser@darmarit.de> [danvet: Rebase onto the partial fix 006c23327f8d ("documentation/gpu/i915: fix docs build error after file rename")] Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch> Link: https://patchwork.freedesktop.org/patch/msgid/1513078717-12373-1-git-send-email-markus.heiser@darmarit.de (cherry picked from commit 0132a1a5d44d2cd32a249dbe999a88c2134a6bd1) Signed-off-by: Jani Nikula <jani.nikula@intel.com>
2018-01-02documentation/gpu/i915: fix docs build error after file renameRandy Dunlap1-2/+2
Fix documentation build errors after intel_guc_loader.c was renamed to intel_guc_fw.c. Error: Cannot open file ../drivers/gpu/drm/i915/intel_guc_loader.c WARNING: kernel-doc '../scripts/kernel-doc -rst -enable-lineno -function GuC-specific firmware loader ../drivers/gpu/drm/i915/intel_guc_loader.c' failed with return code 1 Error: Cannot open file ../drivers/gpu/drm/i915/intel_guc_loader.c Error: Cannot open file ../drivers/gpu/drm/i915/intel_guc_loader.c WARNING: kernel-doc '../scripts/kernel-doc -rst -enable-lineno -internal ../drivers/gpu/drm/i915/intel_guc_loader.c' failed with return code 2 Fixes: e8668bbcb0f9 ("drm/i915/guc: Rename intel_guc_loader.c to intel_guc_fw.c") Signed-off-by: Randy Dunlap <rdunlap@infradead.org> Cc: Michal Wajdeczko <michal.wajdeczko@intel.com> Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch> Link: https://patchwork.freedesktop.org/patch/msgid/1b214f53-47f5-bef3-f58e-8136de5678ed@infradead.org (cherry picked from commit 006c23327f8de8575508c458131b304188d426f7) Signed-off-by: Jani Nikula <jani.nikula@intel.com>
2018-01-01Merge branch 'x86/urgent' of ↵Linus Torvalds1-1/+5
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull x86 fixes from Thomas Gleixner: "A couple of fixlets for x86: - Fix the ESPFIX double fault handling for 5-level pagetables - Fix the commandline parsing for 'apic=' on 32bit systems and update documentation - Make zombie stack traces reliable - Fix kexec with stack canary - Fix the delivery mode for APICs which was missed when the x86 vector management was converted to single target delivery. Caused a regression due to the broken hardware which ignores affinity settings in lowest prio delivery mode. - Unbreak modules when AMD memory encryption is enabled - Remove an unused parameter of prepare_switch_to" * 'x86/urgent' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: x86/apic: Switch all APICs to Fixed delivery mode x86/apic: Update the 'apic=' description of setting APIC driver x86/apic: Avoid wrong warning when parsing 'apic=' in X86-32 case x86-32: Fix kexec with stack canary (CONFIG_CC_STACKPROTECTOR) x86: Remove unused parameter of prepare_switch_to x86/stacktrace: Make zombie stack traces reliable x86/mm: Unbreak modules that use the DMA API x86/build: Make isoimage work on Debian x86/espfix/64: Fix espfix double-fault handling on 5-level systems
2017-12-31Merge branch 'sched-urgent-for-linus' of ↵Linus Torvalds2-2/+3
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull scheduler fixes from Thomas Gleixner: "Three patches addressing the fallout of the CPU_ISOLATION changes especially with NO_HZ_FULL plus documentation of boot parameter dependency" * 'sched-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: sched/isolation: Document boot parameters dependency on CONFIG_CPU_ISOLATION=y sched/isolation: Enable CONFIG_CPU_ISOLATION=y by default sched/isolation: Make CONFIG_NO_HZ_FULL select CONFIG_CPU_ISOLATION
2017-12-31Merge tag 'char-misc-4.15-rc6' of ↵Linus Torvalds1-1/+1
git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc Pull char/misc fixes from Greg KH: "Here are six small fixes of some of the char/misc drivers that have been sent in to resolve reported issues. Nothing major, a binder use-after-free fix, some thunderbolt bugfixes, a hyper-v bugfix, and an nvmem driver fix. All of these have been in linux-next with no reported issues for a while" * tag 'char-misc-4.15-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc: nvmem: meson-mx-efuse: fix reading from an offset other than 0 binder: fix proc->files use-after-free vmbus: unregister device_obj->channels_kset thunderbolt: Mask ring interrupt properly when polling starts MAINTAINERS: Add thunderbolt.rst to the Thunderbolt driver entry thunderbolt: Make pathname to force_power shorter
2017-12-30Merge branch 'x86-pti-for-linus' of ↵Linus Torvalds2-2/+11
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull x86 page table isolation updates from Thomas Gleixner: "This is the final set of enabling page table isolation on x86: - Infrastructure patches for handling the extra page tables. - Patches which map the various bits and pieces which are required to get in and out of user space into the user space visible page tables. - The required changes to have CR3 switching in the entry/exit code. - Optimizations for the CR3 switching along with documentation how the ASID/PCID mechanism works. - Updates to dump pagetables to cover the user space page tables for W+X scans and extra debugfs files to analyze both the kernel and the user space visible page tables The whole functionality is compile time controlled via a config switch and can be turned on/off on the command line as well" * 'x86-pti-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (32 commits) x86/ldt: Make the LDT mapping RO x86/mm/dump_pagetables: Allow dumping current pagetables x86/mm/dump_pagetables: Check user space page table for WX pages x86/mm/dump_pagetables: Add page table directory to the debugfs VFS hierarchy x86/mm/pti: Add Kconfig x86/dumpstack: Indicate in Oops whether PTI is configured and enabled x86/mm: Clarify the whole ASID/kernel PCID/user PCID naming x86/mm: Use INVPCID for __native_flush_tlb_single() x86/mm: Optimize RESTORE_CR3 x86/mm: Use/Fix PCID to optimize user/kernel switches x86/mm: Abstract switching CR3 x86/mm: Allow flushing for future ASID switches x86/pti: Map the vsyscall page if needed x86/pti: Put the LDT in its own PGD if PTI is on x86/mm/64: Make a full PGD-entry size hole in the memory map x86/events/intel/ds: Map debug buffers in cpu_entry_area x86/cpu_entry_area: Add debugstore entries to cpu_entry_area x86/mm/pti: Map ESPFIX into user space x86/mm/pti: Share entry text PMD x86/entry: Align entry text section to PMD boundary ...
2017-12-28x86/apic: Update the 'apic=' description of setting APIC driverDou Liyang1-1/+5
There are two consumers of apic=: the APIC debug level and the low level generic architecture code, but Linux just documented the first one. Append the second description. Signed-off-by: Dou Liyang <douly.fnst@cn.fujitsu.com> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: peterz@infradead.org Cc: rdunlap@infradead.org Cc: corbet@lwn.net Link: https://lkml.kernel.org/r/20171204040313.24824-2-douly.fnst@cn.fujitsu.com
2017-12-27Merge tag 'sound-4.15-rc6' of ↵Linus Torvalds2-2/+2
git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound Pull sound fixes from Takashi Iwai: "It seems that Santa overslept with a bunch of gifts; the majority of changes here are various device-specific ASoC fixes, most notably the revert of rcar IOMMU support and fsl_ssi AC97 fixes, but also lots of small fixes for codecs. Besides that, the usual HD-audio quirks and fixes are included, too" * tag 'sound-4.15-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound: (31 commits) ALSA: hda - Fix missing COEF init for ALC225/295/299 ALSA: hda: Drop useless WARN_ON() ALSA: hda - change the location for one mic on a Lenovo machine ALSA: hda - fix headset mic detection issue on a Dell machine ALSA: hda - Add MIC_NO_PRESENCE fixup for 2 HP machines ASoC: rsnd: fixup ADG register mask ASoC: rt5514-spi: only enable wakeup when fully initialized ASoC: nau8825: fix issue that pop noise when start capture ASoC: rt5663: Fix the wrong result of the first jack detection ASoC: rsnd: ssi: fix race condition in rsnd_ssi_pointer_update ASoC: Intel: Change kern log level to avoid unwanted messages ASoC: atmel-classd: select correct Kconfig symbol ASoC: wm_adsp: Fix validation of firmware and coeff lengths ASoC: Intel: Skylake: Do not check dev_type for dmic link type ASoC: rockchip: disable clock on error ASoC: tlv320aic31xx: Fix GPIO1 register definition ASoC: codecs: msm8916-wcd: Fix supported formats ASoC: fsl_asrc: Fix typo in a field define ASoC: rsnd: ssiu: clear SSI_MODE for non TDM Extended modes ASoC: da7218: Correct IRQ level in DT binding example ...
2017-12-23x86/pti: Put the LDT in its own PGD if PTI is onAndy Lutomirski1-1/+2
With PTI enabled, the LDT must be mapped in the usermode tables somewhere. The LDT is per process, i.e. per mm. An earlier approach mapped the LDT on context switch into a fixmap area, but that's a big overhead and exhausted the fixmap space when NR_CPUS got big. Take advantage of the fact that there is an address space hole which provides a completely unused pgd. Use this pgd to manage per-mm LDT mappings. This has a down side: the LDT isn't (currently) randomized, and an attack that can write the LDT is instant root due to call gates (thanks, AMD, for leaving call gates in AMD64 but designing them wrong so they're only useful for exploits). This can be mitigated by making the LDT read-only or randomizing the mapping, either of which is strightforward on top of this patch. This will significantly slow down LDT users, but that shouldn't matter for important workloads -- the LDT is only used by DOSEMU(2), Wine, and very old libc implementations. [ tglx: Cleaned it up. ] Signed-off-by: Andy Lutomirski <luto@kernel.org> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dave Hansen <dave.hansen@intel.com> Cc: Dave Hansen <dave.hansen@linux.intel.com> Cc: David Laight <David.Laight@aculab.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Kees Cook <keescook@chromium.org> Cc: Kirill A. Shutemov <kirill@shutemov.name> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-12-23x86/mm/64: Make a full PGD-entry size hole in the memory mapAndy Lutomirski1-2/+2
Shrink vmalloc space from 16384TiB to 12800TiB to enlarge the hole starting at 0xff90000000000000 to be a full PGD entry. A subsequent patch will use this hole for the pagetable isolation LDT alias. Signed-off-by: Andy Lutomirski <luto@kernel.org> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dave Hansen <dave.hansen@intel.com> Cc: Dave Hansen <dave.hansen@linux.intel.com> Cc: David Laight <David.Laight@aculab.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Kees Cook <keescook@chromium.org> Cc: Kirill A. Shutemov <kirill@shutemov.name> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-12-23x86/pti: Add the pti= cmdline option and documentationBorislav Petkov1-0/+6
Keep the "nopti" optional for traditional reasons. [ tglx: Don't allow force on when running on XEN PV and made 'on' printout conditional ] Requested-by: Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by: Borislav Petkov <bp@suse.de> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: Andy Lutomirski <luto@kernel.org> Cc: Andy Lutomirsky <luto@kernel.org> Cc: Boris Ostrovsky <boris.ostrovsky@oracle.com> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dave Hansen <dave.hansen@intel.com> Cc: Dave Hansen <dave.hansen@linux.intel.com> Cc: David Laight <David.Laight@aculab.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: Eduardo Valentin <eduval@amazon.com> Cc: Greg KH <gregkh@linuxfoundation.org> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Will Deacon <will.deacon@arm.com> Cc: aliguori@amazon.com Cc: daniel.gruss@iaik.tugraz.at Cc: hughd@google.com Cc: keescook@google.com Link: https://lkml.kernel.org/r/20171212133952.10177-1-bp@alien8.de Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-12-23x86/mm/pti: Add infrastructure for page table isolationThomas Gleixner1-0/+2
Add the initial files for kernel page table isolation, with a minimal init function and the boot time detection for this misfeature. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Borislav Petkov <bp@suse.de> Cc: Andy Lutomirski <luto@kernel.org> Cc: Boris Ostrovsky <boris.ostrovsky@oracle.com> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dave Hansen <dave.hansen@linux.intel.com> Cc: David Laight <David.Laight@aculab.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: Eduardo Valentin <eduval@amazon.com> Cc: Greg KH <gregkh@linuxfoundation.org> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Will Deacon <will.deacon@arm.com> Cc: aliguori@amazon.com Cc: daniel.gruss@iaik.tugraz.at Cc: hughd@google.com Cc: keescook@google.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-12-23Merge branch 'x86-pti-for-linus' of ↵Linus Torvalds1-13/+11
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull x86 PTI preparatory patches from Thomas Gleixner: "Todays Advent calendar window contains twentyfour easy to digest patches. The original plan was to have twenty three matching the date, but a late fixup made that moot. - Move the cpu_entry_area mapping out of the fixmap into a separate address space. That's necessary because the fixmap becomes too big with NRCPUS=8192 and this caused already subtle and hard to diagnose failures. The top most patch is fresh from today and cures a brain slip of that tall grumpy german greybeard, who ignored the intricacies of 32bit wraparounds. - Limit the number of CPUs on 32bit to 64. That's insane big already, but at least it's small enough to prevent address space issues with the cpu_entry_area map, which have been observed and debugged with the fixmap code - A few TLB flush fixes in various places plus documentation which of the TLB functions should be used for what. - Rename the SYSENTER stack to CPU_ENTRY_AREA stack as it is used for more than sysenter now and keeping the name makes backtraces confusing. - Prevent LDT inheritance on exec() by moving it to arch_dup_mmap(), which is only invoked on fork(). - Make vysycall more robust. - A few fixes and cleanups of the debug_pagetables code. Check PAGE_PRESENT instead of checking the PTE for 0 and a cleanup of the C89 initialization of the address hint array which already was out of sync with the index enums. - Move the ESPFIX init to a different place to prepare for PTI. - Several code moves with no functional change to make PTI integration simpler and header files less convoluted. - Documentation fixes and clarifications" * 'x86-pti-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (24 commits) x86/cpu_entry_area: Prevent wraparound in setup_cpu_entry_area_ptes() on 32bit init: Invoke init_espfix_bsp() from mm_init() x86/cpu_entry_area: Move it out of the fixmap x86/cpu_entry_area: Move it to a separate unit x86/mm: Create asm/invpcid.h x86/mm: Put MMU to hardware ASID translation in one place x86/mm: Remove hard-coded ASID limit checks x86/mm: Move the CR3 construction functions to tlbflush.h x86/mm: Add comments to clarify which TLB-flush functions are supposed to flush what x86/mm: Remove superfluous barriers x86/mm: Use __flush_tlb_one() for kernel memory x86/microcode: Dont abuse the TLB-flush interface x86/uv: Use the right TLB-flush API x86/entry: Rename SYSENTER_stack to CPU_ENTRY_AREA_entry_stack x86/doc: Remove obvious weirdnesses from the x86 MM layout documentation x86/mm/64: Improve the memory map documentation x86/ldt: Prevent LDT inheritance on exec x86/ldt: Rework locking arch, mm: Allow arch_dup_mmap() to fail x86/vsyscall/64: Warn and fail vsyscall emulation in NATIVE mode ...
2017-12-22x86/cpu_entry_area: Move it out of the fixmapThomas Gleixner1-0/+2
Put the cpu_entry_area into a separate P4D entry. The fixmap gets too big and 0-day already hit a case where the fixmap PTEs were cleared by cleanup_highmap(). Aside of that the fixmap API is a pain as it's all backwards. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Dave Hansen <dave.hansen@linux.intel.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-12-22x86/doc: Remove obvious weirdnesses from the x86 MM layout documentationPeter Zijlstra1-9/+3
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: Andy Lutomirski <luto@kernel.org> Cc: Boris Ostrovsky <boris.ostrovsky@oracle.com> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dave Hansen <dave.hansen@linux.intel.com> Cc: David Laight <David.Laight@aculab.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: Eduardo Valentin <eduval@amazon.com> Cc: Greg KH <gregkh@linuxfoundation.org> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Will Deacon <will.deacon@arm.com> Cc: aliguori@amazon.com Cc: daniel.gruss@iaik.tugraz.at Cc: hughd@google.com Cc: keescook@google.com Cc: linux-mm@kvack.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-12-22x86/mm/64: Improve the memory map documentationAndy Lutomirski1-4/+6
The old docs had the vsyscall range wrong and were missing the fixmap. Fix both. There used to be 8 MB reserved for future vsyscalls, but that's long gone. Signed-off-by: Andy Lutomirski <luto@kernel.org> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dave Hansen <dave.hansen@intel.com> Cc: Dave Hansen <dave.hansen@linux.intel.com> Cc: David Laight <David.Laight@aculab.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Kees Cook <keescook@chromium.org> Cc: Kirill A. Shutemov <kirill@shutemov.name> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-12-22drm/panel: Add DT bindings for Ilitek ILI9322Linus Walleij1-0/+49
This adds device tree bindings for the Ilitek ILI9322 320x240 TFT panel driver. Cc: David Lechner <david@lechnology.com> Cc: Stefano Babic <sbabic@denx.de> Cc: Ben Dooks <ben.dooks@codethink.co.uk> Cc: devicetree@vger.kernel.org Reviewed-by: Rob Herring <robh@kernel.org> Signed-off-by: Linus Walleij <linus.walleij@linaro.org> Link: https://patchwork.freedesktop.org/patch/msgid/20171201161659.9588-1-linus.walleij@linaro.org
2017-12-22Merge tag 'drm-misc-next-2017-12-21' of ↵Dave Airlie3-22/+46
git://anongit.freedesktop.org/drm/drm-misc into drm-next drm-misc-next for 4.16: Core Changes: - mostly doc updates and some fbdev improvements * tag 'drm-misc-next-2017-12-21' of git://anongit.freedesktop.org/drm/drm-misc: drm/framebuffer: Print task that allocated the fb in debug info. drm/fb-helper: Add drm_fb_helper_defio_init() drm/fb-helper: Update DOC with new helpers drm/docs: Add todo entry for drm_fb_helper_fbdev_setup() drm/fb-helper: Add drm_fb_helper_fbdev_setup/teardown() drm/fb-helper: Set/clear dev->fb_helper in dummy init/fini drm/stm: ltdc: Remove unnecessary platform_get_resource() error check drm/stm: dsi: Remove unnecessary platform_get_resource() error check drm/doc: Move legacy kms helpers to the very end drm/atomic: document how to handle driver private objects drm/syncobj: some kerneldoc polish drm/print: Unconfuse kerneldoc drm/edid: kerneldoc for is_hdmi2_sink
2017-12-21Merge tag 'omapdrm-4.16' of ↵Dave Airlie6-2/+23
git://git.kernel.org/pub/scm/linux/kernel/git/tomba/linux into drm-next omapdrm changes for v4.16 * support memory bandwidth limits * DSI command mode panel cleanups for N9 * DMM error handling * tag 'omapdrm-4.16' of git://git.kernel.org/pub/scm/linux/kernel/git/tomba/linux: (27 commits) drm: omapdrm: Simplify platform registration drm: omapdrm: Remove filename from header and fix copyright tag drm/omap: DMM: Check for DMM readiness after successful transaction commit drm/omap: DMM: Print information if we received an error interrupt drm/omap: DMM: In case of error/timeout in wait_status() print the reason drm/omap: DMM: Fix DMM_IRQSTAT_ERR_MASK definition drm: omapdrm: Deconstruct the omap_drv.h header. drm: omapdrm: venc: Return error code on OF parsing failure drm: omapdrm: dpi: Remove dpi_data port_initialized field drm: omapdrm: dss: Make dss_dump_clocks() function static drm: omapdrm: dss: Set the DMA coherent mask drm: omapdrm: Remove unused omap_dss_find_device() function drm: omapdrm: Pass drm_device to omap_gem_resume() drm: omapdrm: dpi: Don't treat GPIO probe deferral as an error drm/omap: panel-dsi-cm: switch to gpiod drm/omap: panel-dsi-cm: add external backlight support drm/omap: panel-dsi-cm: add physical size support drm/omap: panel-dsi-cm: add regulator support drm/omap: panel-dsi-cm: fix driver drm/omap: add support for physical size hints from display drivers ...