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* Merge tag 'mips_fixes_4.17_1' of ↵Linus Torvalds2018-04-204-6/+26
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/jhogan/mips Pull MIPS fixes from James Hogan: - io: Add barriers to read*() & write*() - dts: Fix boston PCI bus DTC warnings (4.17) - memset: Several corner case fixes (one 3.10, others longer) * tag 'mips_fixes_4.17_1' of git://git.kernel.org/pub/scm/linux/kernel/git/jhogan/mips: MIPS: uaccess: Add micromips clobbers to bzero invocation MIPS: memset.S: Fix clobber of v1 in last_fixup MIPS: memset.S: Fix return of __clear_user from Lpartial_fixup MIPS: memset.S: EVA & fault support for small_memset MIPS: dts: Boston: Fix PCI bus dtc warnings: MIPS: io: Add barrier after register read in readX() MIPS: io: Prevent compiler reordering writeX()
| * MIPS: uaccess: Add micromips clobbers to bzero invocationMatt Redfearn2018-04-181-2/+9
| | | | | | | | | | | | | | | | | | | | | | | | | | | | The micromips implementation of bzero additionally clobbers registers t7 & t8. Specify this in the clobbers list when invoking bzero. Fixes: 26c5e07d1478 ("MIPS: microMIPS: Optimise 'memset' core library function.") Reported-by: James Hogan <jhogan@kernel.org> Signed-off-by: Matt Redfearn <matt.redfearn@mips.com> Cc: Ralf Baechle <ralf@linux-mips.org> Cc: linux-mips@linux-mips.org Cc: <stable@vger.kernel.org> # 3.10+ Patchwork: https://patchwork.linux-mips.org/patch/19110/ Signed-off-by: James Hogan <jhogan@kernel.org>
| * MIPS: memset.S: Fix clobber of v1 in last_fixupMatt Redfearn2018-04-181-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The label .Llast_fixup\@ is jumped to on page fault within the final byte set loop of memset (on < MIPSR6 architectures). For some reason, in this fault handler, the v1 register is randomly set to a2 & STORMASK. This clobbers v1 for the calling function. This can be observed with the following test code: static int __init __attribute__((optimize("O0"))) test_clear_user(void) { register int t asm("v1"); char *test; int j, k; pr_info("\n\n\nTesting clear_user\n"); test = vmalloc(PAGE_SIZE); for (j = 256; j < 512; j++) { t = 0xa5a5a5a5; if ((k = clear_user(test + PAGE_SIZE - 256, j)) != j - 256) { pr_err("clear_user (%px %d) returned %d\n", test + PAGE_SIZE - 256, j, k); } if (t != 0xa5a5a5a5) { pr_err("v1 was clobbered to 0x%x!\n", t); } } return 0; } late_initcall(test_clear_user); Which demonstrates that v1 is indeed clobbered (MIPS64): Testing clear_user v1 was clobbered to 0x1! v1 was clobbered to 0x2! v1 was clobbered to 0x3! v1 was clobbered to 0x4! v1 was clobbered to 0x5! v1 was clobbered to 0x6! v1 was clobbered to 0x7! Since the number of bytes that could not be set is already contained in a2, the andi placing a value in v1 is not necessary and actively harmful in clobbering v1. Reported-by: James Hogan <jhogan@kernel.org> Signed-off-by: Matt Redfearn <matt.redfearn@mips.com> Cc: Ralf Baechle <ralf@linux-mips.org> Cc: linux-mips@linux-mips.org Cc: stable@vger.kernel.org Patchwork: https://patchwork.linux-mips.org/patch/19109/ Signed-off-by: James Hogan <jhogan@kernel.org>
| * MIPS: memset.S: Fix return of __clear_user from Lpartial_fixupMatt Redfearn2018-04-171-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The __clear_user function is defined to return the number of bytes that could not be cleared. From the underlying memset / bzero implementation this means setting register a2 to that number on return. Currently if a page fault is triggered within the memset_partial block, the value loaded into a2 on return is meaningless. The label .Lpartial_fixup\@ is jumped to on page fault. In order to work out how many bytes failed to copy, the exception handler should find how many bytes left in the partial block (andi a2, STORMASK), add that to the partial block end address (a2), and subtract the faulting address to get the remainder. Currently it incorrectly subtracts the partial block start address (t1), which has additionally been clobbered to generate a jump target in memset_partial. Fix this by adding the block end address instead. This issue was found with the following test code: int j, k; for (j = 0; j < 512; j++) { if ((k = clear_user(NULL, j)) != j) { pr_err("clear_user (NULL %d) returned %d\n", j, k); } } Which now passes on Creator Ci40 (MIPS32) and Cavium Octeon II (MIPS64). Suggested-by: James Hogan <jhogan@kernel.org> Signed-off-by: Matt Redfearn <matt.redfearn@mips.com> Cc: Ralf Baechle <ralf@linux-mips.org> Cc: linux-mips@linux-mips.org Cc: stable@vger.kernel.org Patchwork: https://patchwork.linux-mips.org/patch/19108/ Signed-off-by: James Hogan <jhogan@kernel.org>
| * MIPS: memset.S: EVA & fault support for small_memsetMatt Redfearn2018-04-161-1/+6
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The MIPS kernel memset / bzero implementation includes a small_memset branch which is used when the region to be set is smaller than a long (4 bytes on 32bit, 8 bytes on 64bit). The current small_memset implementation uses a simple store byte loop to write the destination. There are 2 issues with this implementation: 1. When EVA mode is active, user and kernel address spaces may overlap. Currently the use of the sb instruction means kernel mode addressing is always used and an intended write to userspace may actually overwrite some critical kernel data. 2. If the write triggers a page fault, for example by calling __clear_user(NULL, 2), instead of gracefully handling the fault, an OOPS is triggered. Fix these issues by replacing the sb instruction with the EX() macro, which will emit EVA compatible instuctions as required. Additionally implement a fault fixup for small_memset which sets a2 to the number of bytes that could not be cleared (as defined by __clear_user). Reported-by: Chuanhua Lei <chuanhua.lei@intel.com> Signed-off-by: Matt Redfearn <matt.redfearn@mips.com> Cc: Ralf Baechle <ralf@linux-mips.org> Cc: linux-mips@linux-mips.org Cc: stable@vger.kernel.org Patchwork: https://patchwork.linux-mips.org/patch/18975/ Signed-off-by: James Hogan <jhogan@kernel.org>
| * MIPS: dts: Boston: Fix PCI bus dtc warnings:Matt Redfearn2018-04-161-0/+6
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | dtc recently (v1.4.4-8-g756ffc4f52f6) added PCI bus checks. Fix the warnings now emitted: arch/mips/boot/dts/img/boston.dtb: Warning (pci_bridge): /pci@10000000: missing bus-range for PCI bridge arch/mips/boot/dts/img/boston.dtb: Warning (pci_bridge): /pci@12000000: missing bus-range for PCI bridge arch/mips/boot/dts/img/boston.dtb: Warning (pci_bridge): /pci@14000000: missing bus-range for PCI bridge Signed-off-by: Matt Redfearn <matt.redfearn@mips.com> Cc: Ralf Baechle <ralf@linux-mips.org> Cc: Paul Burton <paul.burton@mips.com> Cc: Rob Herring <robh+dt@kernel.org> Cc: Mark Rutland <mark.rutland@arm.com> Cc: linux-mips@linux-mips.org Cc: devicetree@vger.kernel.org Patchwork: https://patchwork.linux-mips.org/patch/19070/ Signed-off-by: James Hogan <jhogan@kernel.org>
| * MIPS: io: Add barrier after register read in readX()Sinan Kaya2018-04-141-0/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | While a barrier is present in the writeX() functions before the register write, a similar barrier is missing in the readX() functions after the register read. This could allow memory accesses following readX() to observe stale data. Signed-off-by: Sinan Kaya <okaya@codeaurora.org> Reported-by: Arnd Bergmann <arnd@arndb.de> Cc: Ralf Baechle <ralf@linux-mips.org> Cc: Paul Burton <paul.burton@mips.com> Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/19069/ [jhogan@kernel.org: Tidy commit message] Signed-off-by: James Hogan <jhogan@kernel.org>
| * MIPS: io: Prevent compiler reordering writeX()Sinan Kaya2018-04-131-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | writeX() has strong ordering semantics with respect to memory updates. In the absence of a write barrier or a compiler barrier, the compiler can reorder register and memory update instructions. This breaks the writeX() API. Signed-off-by: Sinan Kaya <okaya@codeaurora.org> Cc: Arnd Bergmann <arnd@arndb.de> Cc: Ralf Baechle <ralf@linux-mips.org> Cc: Paul Burton <paul.burton@mips.com> Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/18997/ [jhogan@kernel.org: Tidy commit message] Signed-off-by: James Hogan <jhogan@kernel.org>
* | mm/gup.c: document return valueMichael S. Tsirkin2018-04-141-0/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | __get_user_pages_fast handles errors differently from get_user_pages_fast: the former always returns the number of pages pinned, the later might return a negative error code. Link: http://lkml.kernel.org/r/1522962072-182137-6-git-send-email-mst@redhat.com Signed-off-by: Michael S. Tsirkin <mst@redhat.com> Reviewed-by: Andrew Morton <akpm@linux-foundation.org> Cc: Kirill A. Shutemov <kirill.shutemov@linux.intel.com> Cc: Huang Ying <ying.huang@intel.com> Cc: Jonathan Corbet <corbet@lwn.net> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Thorsten Leemhuis <regressions@leemhuis.info> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | mm: introduce MAP_FIXED_NOREPLACEMichal Hocko2018-04-111-0/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Patch series "mm: introduce MAP_FIXED_NOREPLACE", v2. This has started as a follow up discussion [3][4] resulting in the runtime failure caused by hardening patch [5] which removes MAP_FIXED from the elf loader because MAP_FIXED is inherently dangerous as it might silently clobber an existing underlying mapping (e.g. stack). The reason for the failure is that some architectures enforce an alignment for the given address hint without MAP_FIXED used (e.g. for shared or file backed mappings). One way around this would be excluding those archs which do alignment tricks from the hardening [6]. The patch is really trivial but it has been objected, rightfully so, that this screams for a more generic solution. We basically want a non-destructive MAP_FIXED. The first patch introduced MAP_FIXED_NOREPLACE which enforces the given address but unlike MAP_FIXED it fails with EEXIST if the given range conflicts with an existing one. The flag is introduced as a completely new one rather than a MAP_FIXED extension because of the backward compatibility. We really want a never-clobber semantic even on older kernels which do not recognize the flag. Unfortunately mmap sucks wrt flags evaluation because we do not EINVAL on unknown flags. On those kernels we would simply use the traditional hint based semantic so the caller can still get a different address (which sucks) but at least not silently corrupt an existing mapping. I do not see a good way around that. Except we won't export expose the new semantic to the userspace at all. It seems there are users who would like to have something like that. Jemalloc has been mentioned by Michael Ellerman [7] Florian Weimer has mentioned the following: : glibc ld.so currently maps DSOs without hints. This means that the kernel : will map right next to each other, and the offsets between them a completely : predictable. We would like to change that and supply a random address in a : window of the address space. If there is a conflict, we do not want the : kernel to pick a non-random address. Instead, we would try again with a : random address. John Hubbard has mentioned CUDA example : a) Searches /proc/<pid>/maps for a "suitable" region of available : VA space. "Suitable" generally means it has to have a base address : within a certain limited range (a particular device model might : have odd limitations, for example), it has to be large enough, and : alignment has to be large enough (again, various devices may have : constraints that lead us to do this). : : This is of course subject to races with other threads in the process. : : Let's say it finds a region starting at va. : : b) Next it does: : p = mmap(va, ...) : : *without* setting MAP_FIXED, of course (so va is just a hint), to : attempt to safely reserve that region. If p != va, then in most cases, : this is a failure (almost certainly due to another thread getting a : mapping from that region before we did), and so this layer now has to : call munmap(), before returning a "failure: retry" to upper layers. : : IMPROVEMENT: --> if instead, we could call this: : : p = mmap(va, ... MAP_FIXED_NOREPLACE ...) : : , then we could skip the munmap() call upon failure. This : is a small thing, but it is useful here. (Thanks to Piotr : Jaroszynski and Mark Hairgrove for helping me get that detail : exactly right, btw.) : : c) After that, CUDA suballocates from p, via: : : q = mmap(sub_region_start, ... MAP_FIXED ...) : : Interestingly enough, "freeing" is also done via MAP_FIXED, and : setting PROT_NONE to the subregion. Anyway, I just included (c) for : general interest. Atomic address range probing in the multithreaded programs in general sounds like an interesting thing to me. The second patch simply replaces MAP_FIXED use in elf loader by MAP_FIXED_NOREPLACE. I believe other places which rely on MAP_FIXED should follow. Actually real MAP_FIXED usages should be docummented properly and they should be more of an exception. [1] http://lkml.kernel.org/r/20171116101900.13621-1-mhocko@kernel.org [2] http://lkml.kernel.org/r/20171129144219.22867-1-mhocko@kernel.org [3] http://lkml.kernel.org/r/20171107162217.382cd754@canb.auug.org.au [4] http://lkml.kernel.org/r/1510048229.12079.7.camel@abdul.in.ibm.com [5] http://lkml.kernel.org/r/20171023082608.6167-1-mhocko@kernel.org [6] http://lkml.kernel.org/r/20171113094203.aofz2e7kueitk55y@dhcp22.suse.cz [7] http://lkml.kernel.org/r/87efp1w7vy.fsf@concordia.ellerman.id.au This patch (of 2): MAP_FIXED is used quite often to enforce mapping at the particular range. The main problem of this flag is, however, that it is inherently dangerous because it unmaps existing mappings covered by the requested range. This can cause silent memory corruptions. Some of them even with serious security implications. While the current semantic might be really desiderable in many cases there are others which would want to enforce the given range but rather see a failure than a silent memory corruption on a clashing range. Please note that there is no guarantee that a given range is obeyed by the mmap even when it is free - e.g. arch specific code is allowed to apply an alignment. Introduce a new MAP_FIXED_NOREPLACE flag for mmap to achieve this behavior. It has the same semantic as MAP_FIXED wrt. the given address request with a single exception that it fails with EEXIST if the requested address is already covered by an existing mapping. We still do rely on get_unmaped_area to handle all the arch specific MAP_FIXED treatment and check for a conflicting vma after it returns. The flag is introduced as a completely new one rather than a MAP_FIXED extension because of the backward compatibility. We really want a never-clobber semantic even on older kernels which do not recognize the flag. Unfortunately mmap sucks wrt. flags evaluation because we do not EINVAL on unknown flags. On those kernels we would simply use the traditional hint based semantic so the caller can still get a different address (which sucks) but at least not silently corrupt an existing mapping. I do not see a good way around that. [mpe@ellerman.id.au: fix whitespace] [fail on clashing range with EEXIST as per Florian Weimer] [set MAP_FIXED before round_hint_to_min as per Khalid Aziz] Link: http://lkml.kernel.org/r/20171213092550.2774-2-mhocko@kernel.org Reviewed-by: Khalid Aziz <khalid.aziz@oracle.com> Signed-off-by: Michal Hocko <mhocko@suse.com> Acked-by: Michael Ellerman <mpe@ellerman.id.au> Cc: Khalid Aziz <khalid.aziz@oracle.com> Cc: Russell King - ARM Linux <linux@armlinux.org.uk> Cc: Andrea Arcangeli <aarcange@redhat.com> Cc: Florian Weimer <fweimer@redhat.com> Cc: John Hubbard <jhubbard@nvidia.com> Cc: Matthew Wilcox <willy@infradead.org> Cc: Abdul Haleem <abdhalee@linux.vnet.ibm.com> Cc: Joel Stanley <joel@jms.id.au> Cc: Kees Cook <keescook@chromium.org> Cc: Michal Hocko <mhocko@suse.com> Cc: Jason Evans <jasone@google.com> Cc: David Goldblatt <davidtgoldblatt@gmail.com> Cc: Edward Tomasz Napierała <trasz@FreeBSD.org> Cc: Anshuman Khandual <khandual@linux.vnet.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | exec: pass stack rlimit into mm layout functionsKees Cook2018-04-111-7/+7
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Patch series "exec: Pin stack limit during exec". Attempts to solve problems with the stack limit changing during exec continue to be frustrated[1][2]. In addition to the specific issues around the Stack Clash family of flaws, Andy Lutomirski pointed out[3] other places during exec where the stack limit is used and is assumed to be unchanging. Given the many places it gets used and the fact that it can be manipulated/raced via setrlimit() and prlimit(), I think the only way to handle this is to move away from the "current" view of the stack limit and instead attach it to the bprm, and plumb this down into the functions that need to know the stack limits. This series implements the approach. [1] 04e35f4495dd ("exec: avoid RLIMIT_STACK races with prlimit()") [2] 779f4e1c6c7c ("Revert "exec: avoid RLIMIT_STACK races with prlimit()"") [3] to security@kernel.org, "Subject: existing rlimit races?" This patch (of 3): Since it is possible that the stack rlimit can change externally during exec (either via another thread calling setrlimit() or another process calling prlimit()), provide a way to pass the rlimit down into the per-architecture mm layout functions so that the rlimit can stay in the bprm structure instead of sitting in the signal structure until exec is finalized. Link: http://lkml.kernel.org/r/1518638796-20819-2-git-send-email-keescook@chromium.org Signed-off-by: Kees Cook <keescook@chromium.org> Cc: Michal Hocko <mhocko@kernel.org> Cc: Ben Hutchings <ben@decadent.org.uk> Cc: Willy Tarreau <w@1wt.eu> Cc: Hugh Dickins <hughd@google.com> Cc: Oleg Nesterov <oleg@redhat.com> Cc: "Jason A. Donenfeld" <Jason@zx2c4.com> Cc: Rik van Riel <riel@redhat.com> Cc: Laura Abbott <labbott@redhat.com> Cc: Greg KH <greg@kroah.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Ben Hutchings <ben.hutchings@codethink.co.uk> Cc: Brad Spengler <spender@grsecurity.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | Merge tag 'mips_4.17' of ↵Linus Torvalds2018-04-1053-69/+1315
|\| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/jhogan/mips Pull MIPS updates from James Hogan: "These are the main MIPS changes for 4.17. Rough overview: (1) generic platform: Add support for Microsemi Ocelot SoCs (2) crypto: Add CRC32 and CRC32C HW acceleration module (3) Various cleanups and misc improvements More detailed summary: Miscellaneous: - hang more efficiently on halt/powerdown/restart - pm-cps: Block system suspend when a JTAG probe is present - expand make help text for generic defconfigs - refactor handling of legacy defconfigs - determine the entry point from the ELF file header to fix microMIPS for certain toolchains - introduce isa-rev.h for MIPS_ISA_REV and use to simplify other code Minor cleanups: - DTS: boston/ci20: Unit name cleanups and correction - kdump: Make the default for PHYSICAL_START always 64-bit - constify gpio_led in Alchemy, AR7, and TXX9 - silence a couple of W=1 warnings - remove duplicate includes Platform support: Generic platform: - add support for Microsemi Ocelot - dt-bindings: Add vendor prefix for Microsemi Corporation - dt-bindings: Add bindings for Microsemi SoCs - add ocelot SoC & PCB123 board DTS files - MAINTAINERS: Add entry for Microsemi MIPS SoCs - enable crc32-mips on r6 configs ath79: - fix AR724X_PLL_REG_PCIE_CONFIG offset BCM47xx: - firmware: Use mac_pton() for MAC address parsing - add Luxul XAP1500/XWR1750 WiFi LEDs - use standard reset button for Luxul XWR-1750 BMIPS: - enable CONFIG_BRCMSTB_PM in bmips_stb_defconfig for build coverage - add STB PM, wake-up timer, watchdog DT nodes Octeon: - drop '.' after newlines in printk calls ralink: - pci-mt7621: Enable PCIe on MT7688" * tag 'mips_4.17' of git://git.kernel.org/pub/scm/linux/kernel/git/jhogan/mips: (37 commits) MIPS: BCM47XX: Use standard reset button for Luxul XWR-1750 MIPS: BCM47XX: Add Luxul XAP1500/XWR1750 WiFi LEDs MIPS: Make the default for PHYSICAL_START always 64-bit MIPS: Use the entry point from the ELF file header MAINTAINERS: Add entry for Microsemi MIPS SoCs MIPS: generic: Add support for Microsemi Ocelot MIPS: mscc: Add ocelot PCB123 device tree MIPS: mscc: Add ocelot dtsi dt-bindings: mips: Add bindings for Microsemi SoCs dt-bindings: Add vendor prefix for Microsemi Corporation MIPS: ath79: Fix AR724X_PLL_REG_PCIE_CONFIG offset MIPS: pci-mt7620: Enable PCIe on MT7688 MIPS: pm-cps: Block system suspend when a JTAG probe is present MIPS: VDSO: Replace __mips_isa_rev with MIPS_ISA_REV MIPS: BPF: Replace __mips_isa_rev with MIPS_ISA_REV MIPS: cpu-features.h: Replace __mips_isa_rev with MIPS_ISA_REV MIPS: Introduce isa-rev.h to define MIPS_ISA_REV MIPS: Hang more efficiently on halt/powerdown/restart FIRMWARE: bcm47xx_nvram: Replace mac address parsing MIPS: BMIPS: Add Broadcom STB watchdog nodes ...
| * MIPS: BCM47XX: Use standard reset button for Luxul XWR-1750Dan Haab2018-04-071-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | The original patch submitted for support of the Luxul XWR-1750 used a non-standard button handler for the reset button. This patch will allow using the standard KEY_RESTART Signed-off-by: Dan Haab <dan.haab@luxul.com> Cc: Ralf Baechle <ralf@linux-mips.org> Cc: Hauke Mehrtens <hauke@hauke-m.de> Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/18981/ Signed-off-by: James Hogan <jhogan@kernel.org>
| * MIPS: BCM47XX: Add Luxul XAP1500/XWR1750 WiFi LEDsDan Haab2018-03-281-0/+21
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Some Luxul devices use PCIe connected GPIO LEDs that are not available until the PCI subsytem and its drivers load. Using the same array for these LEDs would block registering any LEDs until all GPIOs become available. This may be undesired behavior as some LEDs should be available as early as possible (e.g. system status LED). This patch will allow registering available LEDs while deferring these PCIe GPIO connected 'extra' LEDs until they become available. Signed-off-by: Dan Haab <dan.haab@luxul.com> Cc: Ralf Baechle <ralf@linux-mips.org> Cc: Hauke Mehrtens <hauke@hauke-m.de> Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/18952/ Signed-off-by: James Hogan <jhogan@kernel.org>
| * MIPS: Make the default for PHYSICAL_START always 64-bitMaciej W. Rozycki2018-03-281-2/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Make the default for PHYSICAL_START always 64-bit, ensuring that a correct sign-extended value is used if a 32-bit image is loaded by a 64-bit system, and matching how the load address is set in platform Makefile fragments (arch/mips/*/Platform) in the absence of the PHYSICAL_START configuration option. Of course PHYSICAL_START itself is a misnomer as the load address is virtual rather than physical (or otherwise sign-extension would not apply). Fixes: 7aa1c8f47e7e ("MIPS: kdump: Add support") Signed-off-by: Maciej W. Rozycki <macro@mips.com> Cc: Ralf Baechle <ralf@linux-mips.org> Cc: Maxim Uvarov <muvarov@gmail.com> Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/18939/ Signed-off-by: James Hogan <jhogan@kernel.org>
| * MIPS: Use the entry point from the ELF file headerMaciej W. Rozycki2018-03-221-14/+6
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | In order to fetch the correct entry point with the ISA bit included, for use by non-ELF boot loaders, parse the output of `objdump -f' for the start address recorded in the kernel executable itself, rather than using `nm' to get the value of the `kernel_entry' symbol. Sign-extend the address retrieved if 32-bit, so that execution is correctly started on 64-bit processors as well. The tool always prints the entry point using either 8 or 16 hexadecimal digits, matching the address width (aka class) of the ELF file, even in the presence of leading zeros. Signed-off-by: Maciej W. Rozycki <macro@mips.com> Cc: Ralf Baechle <ralf@linux-mips.org> Cc: Paul Burton <paul.burton@mips.com> Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/18912/ Signed-off-by: James Hogan <jhogan@kernel.org>
| * MIPS: generic: Add support for Microsemi OcelotAlexandre Belloni2018-03-225-0/+133
| | | | | | | | | | | | | | | | | | | | | | | | Introduce support for the MIPS based Microsemi Ocelot SoCs. Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com> Cc: Ralf Baechle <ralf@linux-mips.org> Cc: Allan Nielsen <Allan.Nielsen@microsemi.com> Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/18858/ [jhogan@kernel.org: update ocelot_defconfig specification] Signed-off-by: James Hogan <jhogan@kernel.org>
| * MIPS: mscc: Add ocelot PCB123 device treeAlexandre Belloni2018-03-222-0/+29
| | | | | | | | | | | | | | | | | | | | | | | | | | Add a device tree for the Microsemi Ocelot PCB123 evaluation board. Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com> Cc: Ralf Baechle <ralf@linux-mips.org> Cc: Rob Herring <robh+dt@kernel.org> Cc: Allan Nielsen <Allan.Nielsen@microsemi.com> Cc: linux-mips@linux-mips.org Cc: devicetree@vger.kernel.org Patchwork: https://patchwork.linux-mips.org/patch/18856/ Signed-off-by: James Hogan <jhogan@kernel.org>
| * MIPS: mscc: Add ocelot dtsiAlexandre Belloni2018-03-223-0/+119
| | | | | | | | | | | | | | | | | | | | | | | | | | Add a device tree include file for the Microsemi Ocelot SoC. Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com> Cc: Ralf Baechle <ralf@linux-mips.org> Cc: Rob Herring <robh+dt@kernel.org> Cc: Allan Nielsen <Allan.Nielsen@microsemi.com> Cc: linux-mips@linux-mips.org Cc: devicetree@vger.kernel.org Patchwork: https://patchwork.linux-mips.org/patch/18855/ Signed-off-by: James Hogan <jhogan@kernel.org>
| * MIPS: ath79: Fix AR724X_PLL_REG_PCIE_CONFIG offsetMathias Kresin2018-03-141-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | According to the QCA u-boot source the "PCIE Phase Lock Loop Configuration (PCIE_PLL_CONFIG)" register is for all SoCs except the QCA955X and QCA956X at offset 0x10. Since the PCIE PLL config register is only defined for the AR724x fix only this value. The value is wrong since the day it was added and isn't used by any driver yet. Signed-off-by: Mathias Kresin <dev@kresin.me> Cc: Ralf Baechle <ralf@linux-mips.org> Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/16048/ Signed-off-by: James Hogan <jhogan@kernel.org>
| * MIPS: pci-mt7620: Enable PCIe on MT7688Daniel Golle2018-03-141-0/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | Use PCIe support for MT7628AN also on MT7688. Tested on WRTNODE2R. Signed-off-by: Daniel Golle <daniel@makrotopia.org> Cc: John Crispin <john@phrozen.org> Cc: Ralf Baechle <ralf@linux-mips.org> Cc: linux-mips@linux-mips.org Cc: linux-mediatek@lists.infradead.org Patchwork: https://patchwork.linux-mips.org/patch/16223/ Signed-off-by: James Hogan <jhogan@kernel.org>
| * MIPS: pm-cps: Block system suspend when a JTAG probe is presentMatt Redfearn2018-03-091-0/+31
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | If a JTAG probe is connected to a MIPS cluster, then the CPC detects it and latches the CPC.STAT_CONF.EJTAG_PROBE bit to 1. While set, attempting to send a power-down command to a core will be blocked, and the CPC will instead send the core to clock-off state. This can interfere with systems fully entering a low power state where all cores, CM, GIC, etc are powered down. Detect that a JTAG probe is / has been connected to the cluster and block the suspend attempt. Attempting to suspend the system while a JTAG probe is connected now yields: # echo mem > /sys/power/state [ 11.654000] PM: Syncing filesystems ... done. [ 11.658000] JTAG probe is connected - abort suspend -sh: echo: write error: Operation not permitted # To restore suspend, the JTAG probe should be disconnected or put into quiescent state. Platform code can then clear the CPC.STAT_CONF.EJTAG_PROBE bit. Reported-by: Ed Blake <ed.blake@sondrel.com> Signed-off-by: Matt Redfearn <matt.redfearn@mips.com> Cc: Ralf Baechle <ralf@linux-mips.org> Cc: Paul Burton <paul.burton@mips.com> Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/18641/ Signed-off-by: James Hogan <jhogan@kernel.org>
| * MIPS: VDSO: Replace __mips_isa_rev with MIPS_ISA_REVMatt Redfearn2018-03-091-6/+4
| | | | | | | | | | | | | | | | | | | | | | | | Remove the need to check that __mips_isa_rev is defined by using the newly added MIPS_ISA_REV. Signed-off-by: Matt Redfearn <matt.redfearn@mips.com> Cc: Ralf Baechle <ralf@linux-mips.org> Cc: Paul Burton <paul.burton@mips.com> Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/18678/ Signed-off-by: James Hogan <jhogan@kernel.org>
| * MIPS: BPF: Replace __mips_isa_rev with MIPS_ISA_REVMatt Redfearn2018-03-091-4/+5
| | | | | | | | | | | | | | | | | | | | | | | | | | Remove the need to check that __mips_isa_rev is defined by using the newly added MIPS_ISA_REV. Signed-off-by: Matt Redfearn <matt.redfearn@mips.com> Cc: Ralf Baechle <ralf@linux-mips.org> Cc: Paul Burton <paul.burton@mips.com> Cc: David Daney <david.daney@cavium.com> Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/18677/ Signed-off-by: James Hogan <jhogan@kernel.org>
| * MIPS: cpu-features.h: Replace __mips_isa_rev with MIPS_ISA_REVMatt Redfearn2018-03-091-2/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | Remove the need to check that __mips_isa_rev is defined by using the newly added MIPS_ISA_REV. Signed-off-by: Matt Redfearn <matt.redfearn@mips.com> Cc: Ralf Baechle <ralf@linux-mips.org> Cc: Paul Burton <paul.burton@mips.com> Cc: "Maciej W. Rozycki" <macro@mips.com> Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/18675/ Signed-off-by: James Hogan <jhogan@kernel.org>
| * MIPS: Introduce isa-rev.h to define MIPS_ISA_REVMatt Redfearn2018-03-091-0/+24
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | There are multiple instances in the kernel where we need to include or exclude particular instructions based on the ISA revision of the target processor. For MIPS32 / MIPS64, the compiler exports a __mips_isa_rev define. However, when targeting MIPS I - V, this define is absent. This leads to each use of __mips_isa_rev having to check that it is defined first. To simplify this, introduce the isa-rev.h header which always exports MIPS_ISA_REV. The name is changed so as to avoid confusion with the compiler builtin and to avoid accidentally using the builtin. MIPS_ISA_REV is defined to the compilers builtin if provided, or 0, which satisfies all current usages. Suggested-by: Paul Burton <paul.burton@mips.com> Signed-off-by: Matt Redfearn <matt.redfearn@mips.com> Reviewed-by: Maciej W. Rozycki <macro@mips.com> Cc: Ralf Baechle <ralf@linux-mips.org> Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/18676/ Signed-off-by: James Hogan <jhogan@kernel.org>
| * MIPS: Hang more efficiently on halt/powerdown/restartPaul Burton2018-03-091-6/+62
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The generic MIPS implementations of halting, powering down or restarting the system all hang using a busy loop as a last resort. We have many platforms which avoid this loop by implementing their own, many using some variation upon executing a wait instruction to lower CPU power usage if we reach this point. In order to prepare for cleaning up these various custom implementations of the same thing, this patch makes the generic machine_halt(), machine_power_off() & machine_restart() functions each make use of the wait instruction to lower CPU power usage in cases where we know that the wait instruction is available. If wait isn't known to be supported then we fall back to calling cpu_wait(), and if we don't have a cpu_wait() callback then we effectively continue using a busy loop. In effect the new machine_hang() function provides a superset of the functionality that the various platforms currently provide differing subsets of. Signed-off-by: Paul Burton <paul.burton@mips.com> Cc: Ralf Baechle <ralf@linux-mips.org> Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/17178/ Signed-off-by: James Hogan <jhogan@kernel.org>
| * MIPS: BMIPS: Add Broadcom STB watchdog nodesJaedon Shin2018-03-0616-0/+88
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Adds watchdog device nodes to BCM7xxx MIPS based SoCs. Signed-off-by: Jaedon Shin <jaedon.shin@gmail.com> Reviewed-by: Florian Fainelli <f.fainelli@gmail.com> Cc: Ralf Baechle <ralf@linux-mips.org> Cc: Rob Herring <robh+dt@kernel.org> Cc: Kevin Cernekee <cernekee@gmail.com> Cc: Mark Rutland <mark.rutland@arm.com> Cc: linux-mips@linux-mips.org Cc: devicetree@vger.kernel.org Patchwork: https://patchwork.linux-mips.org/patch/17729/ Signed-off-by: James Hogan <jhogan@kernel.org>
| * MIPS: BMIPS: Add Broadcom STB wake-up timer nodesJaedon Shin2018-03-0612-0/+84
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Adds wake-up timer device nodes to BCM7xxx MIPS based SoCs. Signed-off-by: Jaedon Shin <jaedon.shin@gmail.com> Reviewed-by: Florian Fainelli <f.fainelli@gmail.com> Cc: Ralf Baechle <ralf@linux-mips.org> Cc: Rob Herring <robh+dt@kernel.org> Cc: Kevin Cernekee <cernekee@gmail.com> Cc: Mark Rutland <mark.rutland@arm.com> Cc: linux-mips@linux-mips.org Cc: devicetree@vger.kernel.org Patchwork: https://patchwork.linux-mips.org/patch/17728/ Signed-off-by: James Hogan <jhogan@kernel.org>
| * MIPS: BMIPS: Add Broadcom STB power management nodesJaedon Shin2018-03-065-0/+279
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Adds power management nodes to BCM7xxx MIPS based SoCs. Signed-off-by: Jaedon Shin <jaedon.shin@gmail.com> Reviewed-by: Florian Fainelli <f.fainelli@gmail.com> Cc: Ralf Baechle <ralf@linux-mips.org> Cc: Rob Herring <robh+dt@kernel.org> Cc: Kevin Cernekee <cernekee@gmail.com> Cc: Mark Rutland <mark.rutland@arm.com> Cc: linux-mips@linux-mips.org Cc: devicetree@vger.kernel.org Patchwork: https://patchwork.linux-mips.org/patch/17727/ Signed-off-by: James Hogan <jhogan@kernel.org>
| * MIPS: Expand help text to list generic defconfigsJames Hogan2018-03-051-0/+19
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Expand the MIPS Makefile help text to list generic board names, generic defconfigs, and legacy defconfigs which have been converted to generic and are still usable. Here's a snippet of the new "make ARCH=mips help" output: ... If you are targeting a system supported by generic kernels you may configure the kernel for a given architecture target like so: {micro32,32,64}{r1,r2,r6}{el,}_defconfig <BOARDS="list of boards"> Where BOARDS is some subset of the following: boston ni169445 ranchu sead-3 xilfpga Specifically the following generic default configurations are supported: 32r1_defconfig - Build generic kernel for MIPS32 r1 32r1el_defconfig - Build generic kernel for MIPS32 r1 little endian 32r2_defconfig - Build generic kernel for MIPS32 r2 32r2el_defconfig - Build generic kernel for MIPS32 r2 little endian 32r6_defconfig - Build generic kernel for MIPS32 r6 32r6el_defconfig - Build generic kernel for MIPS32 r6 little endian 64r1_defconfig - Build generic kernel for MIPS64 r1 64r1el_defconfig - Build generic kernel for MIPS64 r1 little endian 64r2_defconfig - Build generic kernel for MIPS64 r2 64r2el_defconfig - Build generic kernel for MIPS64 r2 little endian 64r6_defconfig - Build generic kernel for MIPS64 r6 64r6el_defconfig - Build generic kernel for MIPS64 r6 little endian micro32r2_defconfig - Build generic kernel for microMIPS32 r2 micro32r2el_defconfig - Build generic kernel for microMIPS32 r2 little endian The following legacy default configurations have been converted to generic and can still be used: sead3_defconfig - Build 32r2el_defconfig BOARDS=sead-3 sead3micro_defconfig - Build micro32r2el_defconfig BOARDS=sead-3 xilfpga_defconfig - Build 32r2el_defconfig BOARDS=xilfpga ... Signed-off-by: James Hogan <jhogan@kernel.org> Cc: Ralf Baechle <ralf@linux-mips.org> Cc: Paul Burton <paul.burton@mips.com> Cc: Matt Redfearn <matt.redfearn@mips.com> Cc: linux-mips@linux-mips.org Cc: linux-kbuild@vger.kernel.org Patchwork: https://patchwork.linux-mips.org/patch/18598/
| * MIPS: Refactor legacy defconfigsJames Hogan2018-02-191-9/+10
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Define legacy defconfigs which have been converted to the generic platform more programatically, so that they can be listed in the Makefile help text and as a separate Makefile target without duplication. Signed-off-by: James Hogan <jhogan@kernel.org> Cc: Ralf Baechle <ralf@linux-mips.org> Cc: Paul Burton <paul.burton@mips.com> Cc: Matt Redfearn <matt.redfearn@mips.com> Cc: linux-mips@linux-mips.org Cc: linux-kbuild@vger.kernel.org Patchwork: https://patchwork.linux-mips.org/patch/18596/
| * MIPS: generic: Enable crc32-mips on r6 configsJames Hogan2018-02-192-0/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Enable the crc32-mips module on MIPS generic r6 configs, where the required MIPS r6 CRC instructions may be available. As well as allowing the CRC instructions to be utilised, this should also ensure the module gets some build coverage. Signed-off-by: James Hogan <jhogan@kernel.org> Cc: Ralf Baechle <ralf@linux-mips.org> Cc: Paul Burton <paul.burton@mips.com> Cc: Marcin Nowakowski <marcin.nowakowski@mips.com> Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/18602/
| * MIPS: crypto: Add crc32 and crc32c hw accelerated moduleMarcin Nowakowski2018-02-194-0/+361
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This module registers crc32 and crc32c algorithms that use the optional CRC32[bhwd] and CRC32C[bhwd] instructions in MIPSr6 cores. Signed-off-by: Marcin Nowakowski <marcin.nowakowski@mips.com> Signed-off-by: James Hogan <jhogan@kernel.org> Cc: Ralf Baechle <ralf@linux-mips.org> Cc: "David S. Miller" <davem@davemloft.net> Cc: linux-mips@linux-mips.org Cc: linux-crypto@vger.kernel.org Acked-by: Herbert Xu <herbert@gondor.apana.org.au> Patchwork: https://patchwork.linux-mips.org/patch/18601/ [jhogan@kernel.org: Add CRYPTO_ALG_OPTIONAL_KEY flag on Eric Biggers' suggestion, due to commit a208fa8f3303 ("crypto: hash - annotate algorithms taking optional key") in v4.16-rc1]
| * MIPS: Add crc instruction support flag to elf_hwcapMarcin Nowakowski2018-02-193-0/+5
| | | | | | | | | | | | | | | | | | | | | | | | | | | | Indicate that CRC32 and CRC32C instuctions are supported by the CPU through elf_hwcap flags. This will be used by a follow-up commit that introduces crc32(c) crypto acceleration modules and is required by GENERIC_CPU_AUTOPROBE feature. Signed-off-by: Marcin Nowakowski <marcin.nowakowski@mips.com> Signed-off-by: James Hogan <jhogan@kernel.org> Cc: Ralf Baechle <ralf@linux-mips.org> Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/18600/
| * MIPS: Remove a warning when PHYS_OFFSET is 0x0Mathieu Malaterre2018-02-191-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Rewrite the comparison in `else if` statement, case where `min_low_pfn > ARCH_PFN_OFFSET` has already been checked in the first `if` statement: if (min_low_pfn > ARCH_PFN_OFFSET) { Fix non-fatal warning during compilation using W=1: arch/mips/kernel/setup.c: In function ‘bootmem_init’: arch/mips/kernel/setup.c:461:25: warning: comparison of unsigned expression < 0 is always false [-Wtype-limits] } else if (min_low_pfn < ARCH_PFN_OFFSET) { ^ Signed-off-by: Mathieu Malaterre <malat@debian.org> Reviewed-by: James Hogan <jhogan@kernel.org> Cc: Ralf Baechle <ralf@linux-mips.org> Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/18176/ Signed-off-by: James Hogan <jhogan@kernel.org>
| * MIPS: Make declaration for function `memory_region_available` staticMathieu Malaterre2018-02-191-1/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Fix non-fatal warning during compilation using W=1: arch/mips/kernel/setup.c:158:13: warning: no previous prototype for ‘memory_region_available’ [-Wmissing-prototypes] bool __init memory_region_available(phys_addr_t start, phys_addr_t size) ^~~~~~~~~~~~~~~~~~~~~~~ Signed-off-by: Mathieu Malaterre <malat@debian.org> Cc: Ralf Baechle <ralf@linux-mips.org> Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/18175/ [jhogan@kernel.org: tweak whitespace] Signed-off-by: James Hogan <jhogan@kernel.org>
| * MIPS: dts: Fix a typo in the node unit nameMathieu Malaterre2018-02-191-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The unit name was 8c00000 but since the reg property is declared as: reg = <0x0 0x4c00000 0x1 0xfb400000>; the unit name should have been instead 4c00000. Tested on MIPS Creator CI20 (v1): $ cat /sys/firmware/devicetree/.../partitions/partition@4c00000/label;echo system Reported-by: James Hogan <jhogan@kernel.org> Signed-off-by: Mathieu Malaterre <malat@debian.org> Cc: Ralf Baechle <ralf@linux-mips.org> Cc: Rob Herring <robh+dt@kernel.org> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Paul Burton <paul.burton@mips.com> Cc: Paul Cercueil <paul@crapouillou.net> Cc: linux-mips@linux-mips.org Cc: devicetree@vger.kernel.org Patchwork: https://patchwork.linux-mips.org/patch/18529/ Signed-off-by: James Hogan <jhogan@kernel.org>
| * MIPS: dts: Remove leading 0x and 0s from bindings notationMathieu Malaterre2018-02-192-5/+5
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Improve the DTS files by removing all the leading "0x" and zeros to fix the following dtc warnings: Warning (unit_address_format): Node /XXX unit name should not have leading "0x" and Warning (unit_address_format): Node /XXX unit name should not have leading 0s Converted using the following command: find . -type f \( -iname *.dts -o -iname *.dtsi \) -exec sed -E -i -e "s/@0x([0-9a-fA-F\.]+)\s?\{/@\L\1 \{/g" -e "s/@0+([0-9a-fA-F\.]+)\s?\{/@\L\1 \{/g" {} + For simplicity, two sed expressions were used to solve each warnings separately. To make the regex expression more robust a few other issues were resolved, namely setting unit-address to lower case, and adding a whitespace before the the opening curly brace: https://elinux.org/Device_Tree_Linux#Linux_conventions This is a follow up to commit 4c9847b7375a ("dt-bindings: Remove leading 0x from bindings notation") Reported-by: David Daney <ddaney@caviumnetworks.com> Suggested-by: Rob Herring <robh@kernel.org> Signed-off-by: Mathieu Malaterre <malat@debian.org> Cc: Ralf Baechle <ralf@linux-mips.org> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Paul Burton <paul.burton@mips.com> Cc: Paul Cercueil <paul@crapouillou.net> Cc: linux-mips@linux-mips.org Cc: devicetree@vger.kernel.org Patchwork: https://patchwork.linux-mips.org/patch/18528/ Signed-off-by: James Hogan <jhogan@kernel.org>
| * MIPS: TXX9: Constify gpio_ledArvind Yadav2018-02-191-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | gpio_leds are not supposed to change at runtime. struct gpio_led_platform_data contains a const struct gpio_led pointer since v2.6.39, so mark the gpio_led structures const too. Signed-off-by: Arvind Yadav <arvind.yadav.cs@gmail.com> Cc: Ralf Baechle <ralf@linux-mips.org> Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/18008/ [jhogan@kernel.org: improve commit message] Signed-off-by: James Hogan <jhogan@kernel.org>
| * MIPS: AR7: Constify gpio_ledArvind Yadav2018-02-191-7/+7
| | | | | | | | | | | | | | | | | | | | | | | | | | gpio_leds are not supposed to change at runtime. struct gpio_led_platform_data contains a const struct gpio_led pointer since v2.6.39, so mark the gpio_led structures const too. Signed-off-by: Arvind Yadav <arvind.yadav.cs@gmail.com> Cc: Ralf Baechle <ralf@linux-mips.org> Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/18007/ [jhogan@kernel.org: improve commit message] Signed-off-by: James Hogan <jhogan@kernel.org>
| * MIPS: Alchemy: Constify gpio_ledArvind Yadav2018-02-192-2/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | gpio_leds are not supposed to change at runtime. struct gpio_led_platform_data contains a const struct gpio_led pointer since v2.6.39, so mark the gpio_led structures const too. Signed-off-by: Arvind Yadav <arvind.yadav.cs@gmail.com> Cc: Ralf Baechle <ralf@linux-mips.org> Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/18006/ [jhogan@kernel.org: improve commit message] Signed-off-by: James Hogan <jhogan@kernel.org>
| * MIPS: Remove duplicate includesPravin Shedge2018-02-191-2/+0
| | | | | | | | | | | | | | | | | | | | | | These duplicate includes have been found with scripts/checkincludes.pl but they have been removed manually to avoid removing false positives. Signed-off-by: Pravin Shedge <pravin.shedge4linux@gmail.com> Cc: Ralf Baechle <ralf@linux-mips.org> Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/17920/ Signed-off-by: James Hogan <jhogan@kernel.org>
| * MIPS: BMIPS: Enable CONFIG_SOC_BRCMSTBJaedon Shin2018-02-191-0/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | Enable CONFIG_SOC_BRCMSTB in bmips_stb_defconfig. CONFIG_BRCMSTB_PM is also enabled by default option in Kconfig. Signed-off-by: Jaedon Shin <jaedon.shin@gmail.com> Cc: Ralf Baechle <ralf@linux-mips.org> Cc: Kevin Cernekee <cernekee@gmail.com> Cc: linux-mips@linux-mips.org Reviewed-by: James Hogan <jhogan@kernel.org> Acked-by: Florian Fainelli <f.fainelli@gmail.com> Patchwork: https://patchwork.linux-mips.org/patch/18590/ Signed-off-by: James Hogan <jhogan@kernel.org>
| * MIPS: Octeon: Fix logging messages with spurious periods after newlinesJoe Perches2018-02-191-5/+5
| | | | | | | | | | | | | | | | | | | | | | Using a period after a newline causes bad output. Fixes: 64b139f97c01 ("MIPS: OCTEON: irq: add CIB and other fixes") Signed-off-by: Joe Perches <joe@perches.com> Cc: Ralf Baechle <ralf@linux-mips.org> Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/17886/ Signed-off-by: James Hogan <jhogan@kernel.org>
* | Merge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvmLinus Torvalds2018-04-091-0/+5
|\ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Pull kvm updates from Paolo Bonzini: "ARM: - VHE optimizations - EL2 address space randomization - speculative execution mitigations ("variant 3a", aka execution past invalid privilege register access) - bugfixes and cleanups PPC: - improvements for the radix page fault handler for HV KVM on POWER9 s390: - more kvm stat counters - virtio gpu plumbing - documentation - facilities improvements x86: - support for VMware magic I/O port and pseudo-PMCs - AMD pause loop exiting - support for AMD core performance extensions - support for synchronous register access - expose nVMX capabilities to userspace - support for Hyper-V signaling via eventfd - use Enlightened VMCS when running on Hyper-V - allow userspace to disable MWAIT/HLT/PAUSE vmexits - usual roundup of optimizations and nested virtualization bugfixes Generic: - API selftest infrastructure (though the only tests are for x86 as of now)" * tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm: (174 commits) kvm: x86: fix a prototype warning kvm: selftests: add sync_regs_test kvm: selftests: add API testing infrastructure kvm: x86: fix a compile warning KVM: X86: Add Force Emulation Prefix for "emulate the next instruction" KVM: X86: Introduce handle_ud() KVM: vmx: unify adjacent #ifdefs x86: kvm: hide the unused 'cpu' variable KVM: VMX: remove bogus WARN_ON in handle_ept_misconfig Revert "KVM: X86: Fix SMRAM accessing even if VM is shutdown" kvm: Add emulation for movups/movupd KVM: VMX: raise internal error for exception during invalid protected mode state KVM: nVMX: Optimization: Dont set KVM_REQ_EVENT when VMExit with nested_run_pending KVM: nVMX: Require immediate-exit when event reinjected to L2 and L1 event pending KVM: x86: Fix misleading comments on handling pending exceptions KVM: x86: Rename interrupt.pending to interrupt.injected KVM: VMX: No need to clear pending NMI/interrupt on inject realmode interrupt x86/kvm: use Enlightened VMCS when running on Hyper-V x86/hyper-v: detect nested features x86/hyper-v: define struct hv_enlightened_vmcs and clean field bits ...
| * | KVM: Introduce paravirtualization hints and KVM_HINTS_DEDICATEDWanpeng Li2018-03-061-0/+5
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch introduces kvm_para_has_hint() to query for hints about the configuration of the guests. The first hint KVM_HINTS_DEDICATED, is set if the guest has dedicated physical CPUs for each vCPU (i.e. pinning and no over-commitment). This allows optimizing spinlocks and tells the guest to avoid PV TLB flush. Cc: Paolo Bonzini <pbonzini@redhat.com> Cc: Radim Krčmář <rkrcmar@redhat.com> Cc: Eduardo Habkost <ehabkost@redhat.com> Signed-off-by: Wanpeng Li <wanpengli@tencent.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Radim Krčmář <rkrcmar@redhat.com>
* | | mm: fix races between swapoff and flush dcacheHuang Ying2018-04-061-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Thanks to commit 4b3ef9daa4fc ("mm/swap: split swap cache into 64MB trunks"), after swapoff the address_space associated with the swap device will be freed. So page_mapping() users which may touch the address_space need some kind of mechanism to prevent the address_space from being freed during accessing. The dcache flushing functions (flush_dcache_page(), etc) in architecture specific code may access the address_space of swap device for anonymous pages in swap cache via page_mapping() function. But in some cases there are no mechanisms to prevent the swap device from being swapoff, for example, CPU1 CPU2 __get_user_pages() swapoff() flush_dcache_page() mapping = page_mapping() ... exit_swap_address_space() ... kvfree(spaces) mapping_mapped(mapping) The address space may be accessed after being freed. But from cachetlb.txt and Russell King, flush_dcache_page() only care about file cache pages, for anonymous pages, flush_anon_page() should be used. The implementation of flush_dcache_page() in all architectures follows this too. They will check whether page_mapping() is NULL and whether mapping_mapped() is true to determine whether to flush the dcache immediately. And they will use interval tree (mapping->i_mmap) to find all user space mappings. While mapping_mapped() and mapping->i_mmap isn't used by anonymous pages in swap cache at all. So, to fix the race between swapoff and flush dcache, __page_mapping() is add to return the address_space for file cache pages and NULL otherwise. All page_mapping() invoking in flush dcache functions are replaced with page_mapping_file(). [akpm@linux-foundation.org: simplify page_mapping_file(), per Mike] Link: http://lkml.kernel.org/r/20180305083634.15174-1-ying.huang@intel.com Signed-off-by: "Huang, Ying" <ying.huang@intel.com> Reviewed-by: Andrew Morton <akpm@linux-foundation.org> Cc: Minchan Kim <minchan@kernel.org> Cc: Michal Hocko <mhocko@suse.com> Cc: Johannes Weiner <hannes@cmpxchg.org> Cc: Mel Gorman <mgorman@techsingularity.net> Cc: Dave Hansen <dave.hansen@intel.com> Cc: Chen Liqin <liqin.linux@gmail.com> Cc: Russell King <linux@armlinux.org.uk> Cc: Yoshinori Sato <ysato@users.sourceforge.jp> Cc: "James E.J. Bottomley" <jejb@parisc-linux.org> Cc: Guan Xuetao <gxt@mprc.pku.edu.cn> Cc: "David S. Miller" <davem@davemloft.net> Cc: Chris Zankel <chris@zankel.net> Cc: Vineet Gupta <vgupta@synopsys.com> Cc: Ley Foon Tan <lftan@altera.com> Cc: Ralf Baechle <ralf@linux-mips.org> Cc: Andi Kleen <ak@linux.intel.com> Cc: Mike Rapoport <rppt@linux.vnet.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | | zboot: fix stack protector in compressed boot phaseHuacai Chen2018-04-061-8/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Calling __stack_chk_guard_setup() in decompress_kernel() is too late that stack checking always fails for decompress_kernel() itself. So remove __stack_chk_guard_setup() and initialize __stack_chk_guard before we call decompress_kernel(). Original code comes from ARM but also used for MIPS and SH, so fix them together. If without this fix, compressed booting of these archs will fail because stack checking is enabled by default (>=4.16). Link: http://lkml.kernel.org/r/1522226933-29317-1-git-send-email-chenhc@lemote.com Fixes: 8779657d29c0 ("stackprotector: Introduce CONFIG_CC_STACKPROTECTOR_STRONG") Signed-off-by: Huacai Chen <chenhc@lemote.com> Acked-by: James Hogan <jhogan@kernel.org> Acked-by: Kees Cook <keescook@chromium.org> Acked-by: Rich Felker <dalias@libc.org> Cc: Ralf Baechle <ralf@linux-mips.org> Cc: Russell King <linux@arm.linux.org.uk> Cc: Yoshinori Sato <ysato@users.sourceforge.jp> Cc: Ingo Molnar <mingo@elte.hu> Cc: <stable@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | | Merge tag 'usb-4.17-rc1' of ↵Linus Torvalds2018-04-051-0/+1
|\ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb Pull USB/PHY updates from Greg KH: "Here is the big set of USB and PHY driver patches for 4.17-rc1. Lots of USB typeC work happened this round, with code moving from the staging directory into the "real" part of the kernel, as well as new infrastructure being added to be able to handle the different types of "roles" that typeC requires. There is also the normal huge set of USB gadget controller and driver updates, along with XHCI changes, and a raft of other tiny fixes all over the USB tree. And the PHY driver updates are merged in here as well as they interacted with the USB drivers in some places. All of these have been in linux-next for a while with no reported issues" * tag 'usb-4.17-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb: (250 commits) Revert "USB: serial: ftdi_sio: add Id for Physik Instrumente E-870" usb: musb: gadget: misplaced out of bounds check usb: chipidea: imx: Fix ULPI on imx53 usb: chipidea: imx: Cleanup ci_hdrc_imx_platform_flag usb: chipidea: usbmisc: small clean up usb: chipidea: usbmisc: evdo can be set e/o reset usb: chipidea: usbmisc: evdo is only specific to OTG port USB: serial: ftdi_sio: add Id for Physik Instrumente E-870 usb: dwc3: gadget: never call ->complete() from ->ep_queue() usb: gadget: udc: core: update usb_ep_queue() documentation usb: host: Remove the deprecated ATH79 USB host config options usb: roles: Fix return value check in intel_xhci_usb_probe() USB: gadget: f_midi: fixing a possible double-free in f_midi usb: core: Add USB_QUIRK_DELAY_CTRL_MSG to usbcore quirks usb: core: Copy parameter string correctly and remove superfluous null check USB: announce bcdDevice as well as idVendor, idProduct. USB:fix USB3 devices behind USB3 hubs not resuming at hibernate thaw usb: hub: Reduce warning to notice on power loss USB: serial: ftdi_sio: add support for Harman FirmwareHubEmulator USB: serial: cp210x: add ELDAT Easywave RX09 id ...
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