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2022-03-14MIPS: Only use current_stack_pointer on GCCKees Cook1-0/+2
Unfortunately, Clang did not have support for "sp" as a global register definition, and was crashing after the addition of current_stack_pointer. This has been fixed in Clang 14, but earlier Clang versions need to avoid this code, so add a versioned test and revert back to the open-coded asm instances. Fixes Clang build error: fatal error: error in backend: Invalid register name global variable Fixes: 200ed341b864 ("mips: Implement "current_stack_pointer"") Reported-by: Nathan Chancellor <[email protected]> Reviewed-by: Nathan Chancellor <[email protected]> Link: https://lore.kernel.org/lkml/[email protected] Cc: Thomas Bogendoerfer <[email protected]> Cc: Marc Zyngier <[email protected]> Cc: Guenter Roeck <[email protected]> Cc: Yanteng Si <[email protected]> Cc: [email protected] Signed-off-by: Kees Cook <[email protected]> Reviewed-by: Nick Desaulniers <[email protected]> Signed-off-by: Thomas Bogendoerfer <[email protected]>
2022-03-07DEC: Limit PMAX memory probing to R3k systemsMaciej W. Rozycki1-10/+5
Recent tightening of the opcode table in binutils so as to consistently disallow the assembly or disassembly of CP0 instructions not supported by the processor architecture chosen has caused a regression like below: arch/mips/dec/prom/locore.S: Assembler messages: arch/mips/dec/prom/locore.S:29: Error: opcode not supported on this processor: r4600 (mips3) `rfe' in a piece of code used to probe for memory with PMAX DECstation models, which have non-REX firmware. Those computers always have an R2000 CPU and consequently the exception handler used in memory probing uses the RFE instruction, which those processors use. While adding 64-bit support this code was correctly excluded for 64-bit configurations, however it should have also been excluded for irrelevant 32-bit configurations. Do this now then, and only enable PMAX memory probing for R3k systems. Reported-by: Jan-Benedict Glaw <[email protected]> Reported-by: Sudip Mukherjee <[email protected]> Signed-off-by: Maciej W. Rozycki <[email protected]> Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2") Cc: [email protected] # v2.6.12+ Signed-off-by: Thomas Bogendoerfer <[email protected]>
2022-03-07MIPS: fix fortify panic when copying asm exception handlersAlexander Lobakin1-1/+1
With KCFLAGS="-O3", I was able to trigger a fortify-source memcpy() overflow panic on set_vi_srs_handler(). Although O3 level is not supported in the mainline, under some conditions that may've happened with any optimization settings, it's just a matter of inlining luck. The panic itself is correct, more precisely, 50/50 false-positive and not at the same time. From the one side, no real overflow happens. Exception handler defined in asm just gets copied to some reserved places in the memory. But the reason behind is that C code refers to that exception handler declares it as `char`, i.e. something of 1 byte length. It's obvious that the asm function itself is way more than 1 byte, so fortify logics thought we are going to past the symbol declared. The standard way to refer to asm symbols from C code which is not supposed to be called from C is to declare them as `extern const u8[]`. This is fully correct from any point of view, as any code itself is just a bunch of bytes (including 0 as it is for syms like _stext/_etext/etc.), and the exact size is not known at the moment of compilation. Adjust the type of the except_vec_vi_*() and related variables. Make set_handler() take `const` as a second argument to avoid cast-away warnings and give a little more room for optimization. Signed-off-by: Alexander Lobakin <[email protected]> Signed-off-by: Thomas Bogendoerfer <[email protected]>
2022-03-01mips: Implement "current_stack_pointer"Kees Cook1-0/+2
To follow the existing per-arch conventions replace open-coded uses of asm "sp" as "current_stack_pointer". This will let it be used in non-arch places (like HARDENED_USERCOPY). Cc: Thomas Bogendoerfer <[email protected]> Cc: Marc Zyngier <[email protected]> Cc: Guenter Roeck <[email protected]> Cc: Mark Rutland <[email protected]> Cc: Yanteng Si <[email protected]> Cc: [email protected] Signed-off-by: Kees Cook <[email protected]> Signed-off-by: Thomas Bogendoerfer <[email protected]>
2022-03-01MIPS: Remove TX39XX supportThomas Bogendoerfer33-637/+4
No (active) developer owns this hardware, so let's remove Linux support. Signed-off-by: Thomas Bogendoerfer <[email protected]> Acked-by: Guenter Roeck <[email protected]> Reviewed-by: Geert Uytterhoeven <[email protected]> Tested-by: Geert Uytterhoeven <[email protected]> Acked-by: Atsushi Nemoto <[email protected]>
2022-02-25Merge branch 'set_fs-4' of ↵Arnd Bergmann1-46/+3
git://git.kernel.org/pub/scm/linux/kernel/git/arnd/asm-generic into asm-generic Christoph Hellwig and a few others spent a huge effort on removing set_fs() from most of the important architectures, but about half the other architectures were never completed even though most of them don't actually use set_fs() at all. I did a patch for microblaze at some point, which turned out to be fairly generic, and now ported it to most other architectures, using new generic implementations of access_ok() and __{get,put}_kernel_nocheck(). Three architectures (sparc64, ia64, and sh) needed some extra work, which I also completed. * 'set_fs-4' of git://git.kernel.org/pub/scm/linux/kernel/git/arnd/asm-generic: uaccess: remove CONFIG_SET_FS ia64: remove CONFIG_SET_FS support sh: remove CONFIG_SET_FS support sparc64: remove CONFIG_SET_FS support lib/test_lockup: fix kernel pointer check for separate address spaces uaccess: generalize access_ok() uaccess: fix type mismatch warnings from access_ok() arm64: simplify access_ok() m68k: fix access_ok for coldfire MIPS: use simpler access_ok() MIPS: Handle address errors for accesses above CPU max virtual user address uaccess: add generic __{get,put}_kernel_nofault nios2: drop access_ok() check from __put_user() x86: use more conventional access_ok() definition x86: remove __range_not_ok() sparc64: add __{get,put}_kernel_nofault() nds32: fix access_ok() checks in get/put_user uaccess: fix nios2 and microblaze get_user_8() uaccess: fix integer overflow on access_ok()
2022-02-25uaccess: generalize access_ok()Arnd Bergmann1-28/+1
There are many different ways that access_ok() is defined across architectures, but in the end, they all just compare against the user_addr_max() value or they accept anything. Provide one definition that works for most architectures, checking against TASK_SIZE_MAX for user processes or skipping the check inside of uaccess_kernel() sections. For architectures without CONFIG_SET_FS(), this should be the fastest check, as it comes down to a single comparison of a pointer against a compile-time constant, while the architecture specific versions tend to do something more complex for historic reasons or get something wrong. Type checking for __user annotations is handled inconsistently across architectures, but this is easily simplified as well by using an inline function that takes a 'const void __user *' argument. A handful of callers need an extra __user annotation for this. Some architectures had trick to use 33-bit or 65-bit arithmetic on the addresses to calculate the overflow, however this simpler version uses fewer registers, which means it can produce better object code in the end despite needing a second (statically predicted) branch. Reviewed-by: Christoph Hellwig <[email protected]> Acked-by: Mark Rutland <[email protected]> [arm64, asm-generic] Acked-by: Geert Uytterhoeven <[email protected]> Acked-by: Stafford Horne <[email protected]> Acked-by: Dinh Nguyen <[email protected]> Signed-off-by: Arnd Bergmann <[email protected]>
2022-02-25MIPS: use simpler access_ok()Arnd Bergmann1-18/+4
Before unifying the mips version of __access_ok() with the generic code, this converts it to the same algorithm. This is a change in behavior on mips64, as now address in the user segment, the lower 2^62 bytes, is taken to be valid, relying on a page fault for addresses that are within that segment but not valid on that CPU. The new version should be the most effecient way to do this, but it gets rid of the special handling for size=0 that most other architectures ignore as well. Signed-off-by: Arnd Bergmann <[email protected]>
2022-02-25uaccess: add generic __{get,put}_kernel_nofaultArnd Bergmann1-2/+0
Nine architectures are still missing __{get,put}_kernel_nofault: alpha, ia64, microblaze, nds32, nios2, openrisc, sh, sparc32, xtensa. Add a generic version that lets everything use the normal copy_{from,to}_kernel_nofault() code based on these, removing the last use of get_fs()/set_fs() from architecture-independent code. Reviewed-by: Christoph Hellwig <[email protected]> Acked-by: Geert Uytterhoeven <[email protected]> Signed-off-by: Arnd Bergmann <[email protected]>
2022-02-22MIPS: remove asm/war.hThomas Bogendoerfer4-76/+0
The major part for workaround handling has already moved to config options. This change replaces the remaining defines by already available config options and gets rid of war.h Signed-off-by: Thomas Bogendoerfer <[email protected]>
2022-02-17PCI: Add defines for normal and subtractive PCI bridgesPali Rohár1-2/+0
Add these PCI class codes to pci_ids.h: PCI_CLASS_BRIDGE_PCI_NORMAL PCI_CLASS_BRIDGE_PCI_SUBTRACTIVE Use these defines in all kernel code for describing PCI class codes for normal and subtractive PCI bridges. [bhelgaas: similar change in pci-mvebu.c] Link: https://lore.kernel.org/r/[email protected] Signed-off-by: Pali Rohár <[email protected]> Signed-off-by: Bjorn Helgaas <[email protected]>
2022-02-17shmbuf.h: add asm/shmbuf.h to UAPI compile-test coverageMasahiro Yamada1-2/+5
asm/shmbuf.h is currently excluded from the UAPI compile-test because of the errors like follows: HDRTEST usr/include/asm/shmbuf.h In file included from ./usr/include/asm/shmbuf.h:6, from <command-line>: ./usr/include/asm-generic/shmbuf.h:26:33: error: field ‘shm_perm’ has incomplete type 26 | struct ipc64_perm shm_perm; /* operation perms */ | ^~~~~~~~ ./usr/include/asm-generic/shmbuf.h:27:9: error: unknown type name ‘size_t’ 27 | size_t shm_segsz; /* size of segment (bytes) */ | ^~~~~~ ./usr/include/asm-generic/shmbuf.h:40:9: error: unknown type name ‘__kernel_pid_t’ 40 | __kernel_pid_t shm_cpid; /* pid of creator */ | ^~~~~~~~~~~~~~ ./usr/include/asm-generic/shmbuf.h:41:9: error: unknown type name ‘__kernel_pid_t’ 41 | __kernel_pid_t shm_lpid; /* pid of last operator */ | ^~~~~~~~~~~~~~ The errors can be fixed by replacing size_t with __kernel_size_t and by including proper headers. Then, remove the no-header-test entry from user/include/Makefile. Signed-off-by: Masahiro Yamada <[email protected]> Reviewed-by: Arnd Bergmann <[email protected]> Signed-off-by: Arnd Bergmann <[email protected]>
2022-02-17signal.h: add linux/signal.h and asm/signal.h to UAPI compile-test coverageMasahiro Yamada1-1/+1
linux/signal.h and asm/signal.h are currently excluded from the UAPI compile-test because of the errors like follows: HDRTEST usr/include/asm/signal.h In file included from <command-line>: ./usr/include/asm/signal.h:103:9: error: unknown type name ‘size_t’ 103 | size_t ss_size; | ^~~~~~ The errors can be fixed by replacing size_t with __kernel_size_t. Then, remove the no-header-test entries from user/include/Makefile. Signed-off-by: Masahiro Yamada <[email protected]> Reviewed-by: Arnd Bergmann <[email protected]> Reviewed-by: Geert Uytterhoeven <[email protected]> Acked-by: Geert Uytterhoeven <[email protected]> Signed-off-by: Arnd Bergmann <[email protected]>
2022-02-07MIPS: ath79: add support for QCN550xWenli Looi1-0/+1
Adds support for QCN550x, which appears to be very similar to QCA956x. Signed-off-by: Wenli Looi <[email protected]> Signed-off-by: Thomas Bogendoerfer <[email protected]>
2022-02-03Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/netJakub Kicinski4-94/+94
No conflicts. Signed-off-by: Jakub Kicinski <[email protected]>
2022-01-31txhash: Add socket option to control TX hash rethink behaviorAkhmat Karakotov1-0/+2
Add the SO_TXREHASH socket option to control hash rethink behavior per socket. When default mode is set, sockets disable rehash at initialization and use sysctl option when entering listen state. setsockopt() overrides default behavior. Signed-off-by: Akhmat Karakotov <[email protected]> Reviewed-by: Eric Dumazet <[email protected]> Signed-off-by: David S. Miller <[email protected]>
2022-01-27MIPS: Fix build error due to PTR used in more placesThomas Bogendoerfer4-94/+94
Use PTR_WD instead of PTR to avoid clashes with other parts. Signed-off-by: Thomas Bogendoerfer <[email protected]>
2022-01-23Merge tag 'bitmap-5.17-rc1' of git://github.com/norov/linuxLinus Torvalds1-1/+0
Pull bitmap updates from Yury Norov: - introduce for_each_set_bitrange() - use find_first_*_bit() instead of find_next_*_bit() where possible - unify for_each_bit() macros * tag 'bitmap-5.17-rc1' of git://github.com/norov/linux: vsprintf: rework bitmap_list_string lib: bitmap: add performance test for bitmap_print_to_pagebuf bitmap: unify find_bit operations mm/percpu: micro-optimize pcpu_is_populated() Replace for_each_*_bit_from() with for_each_*_bit() where appropriate find: micro-optimize for_each_{set,clear}_bit() include/linux: move for_each_bit() macros from bitops.h to find.h cpumask: replace cpumask_next_* with cpumask_first_* where appropriate tools: sync tools/bitmap with mother linux all: replace find_next{,_zero}_bit with find_first{,_zero}_bit where appropriate cpumask: use find_first_and_bit() lib: add find_first_and_bit() arch: remove GENERIC_FIND_FIRST_BIT entirely include: move find.h from asm_generic to linux bitops: move find_bit_*_le functions from le.h to find.h bitops: protect find_first_{,zero}_bit properly
2022-01-16Merge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvmLinus Torvalds1-1/+0
Pull kvm updates from Paolo Bonzini: "RISCV: - Use common KVM implementation of MMU memory caches - SBI v0.2 support for Guest - Initial KVM selftests support - Fix to avoid spurious virtual interrupts after clearing hideleg CSR - Update email address for Anup and Atish ARM: - Simplification of the 'vcpu first run' by integrating it into KVM's 'pid change' flow - Refactoring of the FP and SVE state tracking, also leading to a simpler state and less shared data between EL1 and EL2 in the nVHE case - Tidy up the header file usage for the nvhe hyp object - New HYP unsharing mechanism, finally allowing pages to be unmapped from the Stage-1 EL2 page-tables - Various pKVM cleanups around refcounting and sharing - A couple of vgic fixes for bugs that would trigger once the vcpu xarray rework is merged, but not sooner - Add minimal support for ARMv8.7's PMU extension - Rework kvm_pgtable initialisation ahead of the NV work - New selftest for IRQ injection - Teach selftests about the lack of default IPA space and page sizes - Expand sysreg selftest to deal with Pointer Authentication - The usual bunch of cleanups and doc update s390: - fix sigp sense/start/stop/inconsistency - cleanups x86: - Clean up some function prototypes more - improved gfn_to_pfn_cache with proper invalidation, used by Xen emulation - add KVM_IRQ_ROUTING_XEN_EVTCHN and event channel delivery - completely remove potential TOC/TOU races in nested SVM consistency checks - update some PMCs on emulated instructions - Intel AMX support (joint work between Thomas and Intel) - large MMU cleanups - module parameter to disable PMU virtualization - cleanup register cache - first part of halt handling cleanups - Hyper-V enlightened MSR bitmap support for nested hypervisors Generic: - clean up Makefiles - introduce CONFIG_HAVE_KVM_DIRTY_RING - optimize memslot lookup using a tree - optimize vCPU array usage by converting to xarray" * tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm: (268 commits) x86/fpu: Fix inline prefix warnings selftest: kvm: Add amx selftest selftest: kvm: Move struct kvm_x86_state to header selftest: kvm: Reorder vcpu_load_state steps for AMX kvm: x86: Disable interception for IA32_XFD on demand x86/fpu: Provide fpu_sync_guest_vmexit_xfd_state() kvm: selftests: Add support for KVM_CAP_XSAVE2 kvm: x86: Add support for getting/setting expanded xstate buffer x86/fpu: Add uabi_size to guest_fpu kvm: x86: Add CPUID support for Intel AMX kvm: x86: Add XCR0 support for Intel AMX kvm: x86: Disable RDMSR interception of IA32_XFD_ERR kvm: x86: Emulate IA32_XFD_ERR for guest kvm: x86: Intercept #NM for saving IA32_XFD_ERR x86/fpu: Prepare xfd_err in struct fpu_guest kvm: x86: Add emulation for IA32_XFD x86/fpu: Provide fpu_update_guest_xfd() for IA32_XFD emulation kvm: x86: Enable dynamic xfeatures at KVM_SET_CPUID2 x86/fpu: Provide fpu_enable_guest_xfd_features() for KVM x86/fpu: Add guest support to xfd_enable_feature() ...
2022-01-15include: move find.h from asm_generic to linuxYury Norov1-1/+0
find_bit API and bitmap API are closely related, but inclusion paths are different - include/asm-generic and include/linux, correspondingly. In the past it made a lot of troubles due to circular dependencies and/or undefined symbols. Fix this by moving find.h under include/linux. Signed-off-by: Yury Norov <[email protected]> Tested-by: Wolfram Sang <[email protected]> Acked-by: Geert Uytterhoeven <[email protected]>
2022-01-14Merge tag 'mips_5.17' of ↵Linus Torvalds20-993/+85
git://git.kernel.org/pub/scm/linux/kernel/git/mips/linux Pull MIPS updates from Thomas Bogendoerfer: - add support for more BCM47XX based devices - add MIPS support for brcmstb PCIe controller - add Loongson 2K1000 reset driver - remove board support for rbtx4938/rbtx4939 - remove support for TX4939 SoCs - fixes and cleanups * tag 'mips_5.17' of git://git.kernel.org/pub/scm/linux/kernel/git/mips/linux: (59 commits) MIPS: ath79: drop _machine_restart again PCI: brcmstb: Augment driver for MIPs SOCs MIPS: bmips: Remove obsolete DMA mapping support MIPS: bmips: Add support PCIe controller device nodes dt-bindings: PCI: Add compatible string for Brcmstb 74[23]5 MIPs SOCs MIPS: compressed: Fix build with ZSTD compression MIPS: BCM47XX: Add support for Netgear WN2500RP v1 & v2 MIPS: BCM47XX: Add support for Netgear R6300 v1 MIPS: BCM47XX: Add LEDs and buttons for Asus RTN-10U MIPS: BCM47XX: Add board entry for Linksys WRT320N v1 MIPS: BCM47XX: Define Linksys WRT310N V2 buttons MIPS: Remove duplicated include in local.h MIPS: retire "asm/llsc.h" MIPS: rework local_t operation on MIPS64 MIPS: fix local_{add,sub}_return on MIPS64 mips/pci: remove redundant ret variable MIPS: Loongson64: Add missing of_node_put() in ls2k_reset_init() MIPS: new Kconfig option ZBOOT_LOAD_ADDRESS MIPS: enable both vmlinux.gz.itb and vmlinuz for generic MIPS: signal: Return immediately if call fails ...
2022-01-11Merge tag 'locking_core_for_v5.17_rc1' of ↵Linus Torvalds1-10/+17
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull locking updates from Borislav Petkov: "Lots of cleanups and preparation. Highlights: - futex: Cleanup and remove runtime futex_cmpxchg detection - rtmutex: Some fixes for the PREEMPT_RT locking infrastructure - kcsan: Share owner_on_cpu() between mutex,rtmutex and rwsem and annotate the racy owner->on_cpu access *once*. - atomic64: Dead-Code-Elemination" [ Description above by Peter Zijlstra ] * tag 'locking_core_for_v5.17_rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: locking/atomic: atomic64: Remove unusable atomic ops futex: Fix additional regressions locking: Allow to include asm/spinlock_types.h from linux/spinlock_types_raw.h x86/mm: Include spinlock_t definition in pgtable. locking: Mark racy reads of owner->on_cpu locking: Make owner_on_cpu() into <linux/sched.h> lockdep/selftests: Adapt ww-tests for PREEMPT_RT lockdep/selftests: Skip the softirq related tests on PREEMPT_RT lockdep/selftests: Unbalanced migrate_disable() & rcu_read_lock(). lockdep/selftests: Avoid using local_lock_{acquire|release}(). lockdep: Remove softirq accounting on PREEMPT_RT. locking/rtmutex: Add rt_mutex_lock_nest_lock() and rt_mutex_lock_killable(). locking/rtmutex: Squash self-deadlock check for ww_rt_mutex. locking: Remove rt_rwlock_is_contended(). sched: Trigger warning if ->migration_disabled counter underflows. futex: Fix sparc32/m68k/nds32 build regression futex: Remove futex_cmpxchg detection futex: Ensure futex_atomic_cmpxchg_inatomic() is present kernel/locking: Use a pointer in ww_mutex_trylock().
2022-01-09MIPS: BCM47XX: Add support for Netgear WN2500RP v1 & v2Florian Fainelli1-0/+2
Add support for the Netgear WN2500 RP v1 and v2 Wi-Fi range extenders based on the BCM5357 chipset and supporting 802.11n and 802.11ac. Signed-off-by: Florian Fainelli <[email protected]> Signed-off-by: Thomas Bogendoerfer <[email protected]>
2022-01-09MIPS: BCM47XX: Add support for Netgear R6300 v1Florian Fainelli1-0/+1
Add support for the Netgear R6300 v1 Wi-Fi router using a Broadcom BCM4706 chipset and supporting 802.11n and 802.11ac. Signed-off-by: Florian Fainelli <[email protected]> Signed-off-by: Thomas Bogendoerfer <[email protected]>
2022-01-09MIPS: BCM47XX: Add board entry for Linksys WRT320N v1Florian Fainelli1-0/+1
This router is based on a Broadcom BCM4717A1 chipset and supports 802.11n Wi-Fi. Add a board entry for that router and register LEDs and buttons accordingly. Signed-off-by: Florian Fainelli <[email protected]> Signed-off-by: Thomas Bogendoerfer <[email protected]>
2022-01-09MIPS: Remove duplicated include in local.hYang Li1-1/+0
Fix following includecheck warning: ./arch/mips/include/asm/local.h: asm/asm.h is included more than once. Reported-by: Abaci Robot <[email protected]> Signed-off-by: Yang Li <[email protected]> Signed-off-by: Thomas Bogendoerfer <[email protected]>
2022-01-05MIPS: lantiq: dma: increase descritor countAleksander Jan Bajkowski1-1/+1
NAT Performance results on BT Home Hub 5A (kernel 5.10.89, mtu 1500): Down Up Before 539 Mbps 599 Mbps After 545 Mbps 625 Mbps Signed-off-by: Aleksander Jan Bajkowski <[email protected]> Signed-off-by: Jakub Kicinski <[email protected]>
2022-01-05MIPS: retire "asm/llsc.h"Huang Pei6-69/+31
all that "asm/llsc.h" does is just to help inline asm, which can be stringifyed from "asm/asm.h" +. Since "asm/asm.h" has all we need, retire "asm/llsc.h" +. remove unused header file Inspired-by: Maciej W. Rozycki <[email protected]> Signed-off-by: Huang Pei <[email protected]> Signed-off-by: Thomas Bogendoerfer <[email protected]>
2022-01-05MIPS: rework local_t operation on MIPS64Huang Pei2-45/+32
+. remove "asm/war.h" since R10000_LLSC_WAR became a config option +. clean up Suggested-by: Maciej W. Rozycki <[email protected]> Signed-off-by: Huang Pei <[email protected]> Signed-off-by: Thomas Bogendoerfer <[email protected]>
2022-01-05MIPS: fix local_{add,sub}_return on MIPS64Huang Pei1-4/+5
Use "daddu/dsubu" for long int on MIPS64 instead of "addu/subu" Fixes: 7232311ef14c ("local_t: mips extension") Signed-off-by: Huang Pei <[email protected]> Signed-off-by: Thomas Bogendoerfer <[email protected]>
2022-01-02MIPS: TXX9: Remove TX4939 SoC supportThomas Bogendoerfer1-524/+0
After removal of RBTX4939 board support remove code for the TX4939 SoC. Signed-off-by: Thomas Bogendoerfer <[email protected]> Tested-by: Geert Uytterhoeven <[email protected]>
2022-01-02MIPS: TXX9: Remove rbtx4939 board supportThomas Bogendoerfer3-153/+0
No active MIPS user own this board, so let's remove it. Signed-off-by: Thomas Bogendoerfer <[email protected]> Reviewed-by: Geert Uytterhoeven <[email protected]> Tested-by: Geert Uytterhoeven <[email protected]>
2021-12-21MIPS: only register MT SMP ops if MT is supportedSander Vanheule1-0/+3
Verify that the current CPU actually supports multi-threading before registering MT SMP ops, instead of unconditionally registering them if the kernel is compiled with CONFIG_MIPS_MT_SMP. Suggested-by: Jiaxun Yang <[email protected]> Signed-off-by: Sander Vanheule <[email protected]> Signed-off-by: Thomas Bogendoerfer <[email protected]>
2021-12-21MIPS: Octeon: Fix build errors using clangTianjia Zhang1-2/+2
A large number of the following errors is reported when compiling with clang: cvmx-bootinfo.h:326:3: error: adding 'int' to a string does not append to the string [-Werror,-Wstring-plus-int] ENUM_BRD_TYPE_CASE(CVMX_BOARD_TYPE_NULL) ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ cvmx-bootinfo.h:321:20: note: expanded from macro 'ENUM_BRD_TYPE_CASE' case x: return(#x + 16); /* Skip CVMX_BOARD_TYPE_ */ ~~~^~~~ cvmx-bootinfo.h:326:3: note: use array indexing to silence this warning cvmx-bootinfo.h:321:20: note: expanded from macro 'ENUM_BRD_TYPE_CASE' case x: return(#x + 16); /* Skip CVMX_BOARD_TYPE_ */ ^ Follow the prompts to use the address operator '&' to fix this error. Signed-off-by: Tianjia Zhang <[email protected]> Reviewed-by: Nathan Chancellor <[email protected]> Reviewed-by: Philippe Mathieu-Daudé <[email protected]> Signed-off-by: Thomas Bogendoerfer <[email protected]>
2021-12-16mips: kgdb: adjust the comment to the actual ifdef conditionLukas Bulwahn1-1/+1
The comment refers to CONFIG_CPU_32BIT, but the ifdef uses CONFIG_32BIT. As this ifdef and comment was introduced with initial mips-kgdb commit 8854700115ec ("[MIPS] kgdb: add arch support for the kernel's kgdb core"), it is probably just a minor issue that was overlooked during the patch creation and refactoring before submission. This inconsistency was identified with ./scripts/checkkconfigsymbols.py. This script has been quite useful to identify a number of bugs with Kconfig symbols and deserves to be executed and checked regularly. So, adjust the comment to the actual ifdef condition to reduce the reports made the script and simplify to use this script, as new issues are easier to spot when the list of reports is shorter. Signed-off-by: Lukas Bulwahn <[email protected]> Signed-off-by: Thomas Bogendoerfer <[email protected]>
2021-12-14MIPS: fix typo in a commentJason Wang1-1/+1
The double `Address' in the comment in line 487 is repeated. Remove one of them from the comment. Signed-off-by: Jason Wang <[email protected]> Signed-off-by: Thomas Bogendoerfer <[email protected]>
2021-12-13Merge tag 'v5.16-rc5' into locking/core, to pick up fixesIngo Molnar1-2/+0
Signed-off-by: Ingo Molnar <[email protected]>
2021-12-11futex: Fix additional regressionsArnd Bergmann1-3/+3
Naresh reported another architecture that was broken by the same typo that was already fixed for three architectures: mips also refers to the futex_atomic_op_inuser_local() function by the wrong name and runs into a missing closing '}' as well. Going through the source tree the same typo was found in the documentation as well as in the xtensa code, both of which ended up escaping the regression testing so far. In the case of xtensa, it appears that the broken code path is only used when building for platforms that are not supported by the default gcc configuration, so they are impossible to test for with default setups. After going through these more carefully and fixing up the typos, all architectures have been build-tested again to ensure that this is now complete. Fixes: 4e0d84634445 ("futex: Fix sparc32/m68k/nds32 build regression") Fixes: 3f2bedabb62c ("futex: Ensure futex_atomic_cmpxchg_inatomic() is present") Reported-by: Linux Kernel Functional Testing <[email protected]> Reported-by: Naresh Kamboju <[email protected]> Signed-off-by: Arnd Bergmann <[email protected]> Signed-off-by: Thomas Gleixner <[email protected]> Link: https://lore.kernel.org/r/[email protected]
2021-12-09MIPS: TXX9: Remove rbtx4938 board supportThomas Bogendoerfer3-182/+0
No active MIPS user own this board, so let's remove it. Signed-off-by: Thomas Bogendoerfer <[email protected]> Reviewed-by: Geert Uytterhoeven <[email protected]> Tested-by: Geert Uytterhoeven <[email protected]>
2021-12-09MIPS: Loongson64: Use three arguments for sltiNathan Chancellor1-2/+2
LLVM's integrated assembler does not support 'slti <reg>, <imm>': <instantiation>:16:12: error: invalid operand for instruction slti $12, (0x6300 | 0x0008) ^ arch/mips/kernel/head.S:86:2: note: while in macro instantiation kernel_entry_setup # cpu specific setup ^ <instantiation>:16:12: error: invalid operand for instruction slti $12, (0x6300 | 0x0008) ^ arch/mips/kernel/head.S:150:2: note: while in macro instantiation smp_slave_setup ^ To increase compatibility with LLVM's integrated assembler, use the full form of 'slti <reg>, <reg>, <imm>', which matches the rest of arch/mips/. This does not result in any change for GNU as. Link: https://github.com/ClangBuiltLinux/linux/issues/1526 Reported-by: Ryutaroh Matsumoto <[email protected]> Signed-off-by: Nathan Chancellor <[email protected]> Signed-off-by: Thomas Bogendoerfer <[email protected]>
2021-12-09MIPS: Only define pci_remap_iospace() for RalinkTiezhu Yang2-4/+2
After commit 9f76779f2418 ("MIPS: implement architecture-specific 'pci_remap_iospace()'"), there exists the following warning on the Loongson64 platform: loongson-pci 1a000000.pci: IO 0x0018020000..0x001803ffff -> 0x0000020000 loongson-pci 1a000000.pci: MEM 0x0040000000..0x007fffffff -> 0x0040000000 ------------[ cut here ]------------ WARNING: CPU: 2 PID: 1 at arch/mips/pci/pci-generic.c:55 pci_remap_iospace+0x84/0x90 resource start address is not zero ... Call Trace: [<ffffffff8020dc78>] show_stack+0x40/0x120 [<ffffffff80cf4a0c>] dump_stack_lvl+0x58/0x74 [<ffffffff8023a0b0>] __warn+0xe0/0x110 [<ffffffff80cee02c>] warn_slowpath_fmt+0xa4/0xd0 [<ffffffff80cecf24>] pci_remap_iospace+0x84/0x90 [<ffffffff807f9864>] devm_pci_remap_iospace+0x5c/0xb8 [<ffffffff808121b0>] devm_of_pci_bridge_init+0x178/0x1f8 [<ffffffff807f4000>] devm_pci_alloc_host_bridge+0x78/0x98 [<ffffffff80819454>] loongson_pci_probe+0x34/0x160 [<ffffffff809203cc>] platform_probe+0x6c/0xe0 [<ffffffff8091d5d4>] really_probe+0xbc/0x340 [<ffffffff8091d8f0>] __driver_probe_device+0x98/0x110 [<ffffffff8091d9b8>] driver_probe_device+0x50/0x118 [<ffffffff8091dea0>] __driver_attach+0x80/0x118 [<ffffffff8091b280>] bus_for_each_dev+0x80/0xc8 [<ffffffff8091c6d8>] bus_add_driver+0x130/0x210 [<ffffffff8091ead4>] driver_register+0x8c/0x150 [<ffffffff80200a8c>] do_one_initcall+0x54/0x288 [<ffffffff811a5320>] kernel_init_freeable+0x27c/0x2e4 [<ffffffff80cfc380>] kernel_init+0x2c/0x134 [<ffffffff80205a2c>] ret_from_kernel_thread+0x14/0x1c ---[ end trace e4a0efe10aa5cce6 ]--- loongson-pci 1a000000.pci: error -19: failed to map resource [io 0x20000-0x3ffff] We can see that the resource start address is 0x0000020000, because the ISA Bridge used the zero address which is defined in the dts file arch/mips/boot/dts/loongson/ls7a-pch.dtsi: ISA Bridge: /bus@10000000/isa@18000000 IO 0x0000000018000000..0x000000001801ffff -> 0x0000000000000000 Based on the above analysis, the architecture-specific pci_remap_iospace() is not suitable for Loongson64, we should only define pci_remap_iospace() for Ralink on MIPS based on the commit background. Fixes: 9f76779f2418 ("MIPS: implement architecture-specific 'pci_remap_iospace()'") Suggested-by: Thomas Bogendoerfer <[email protected]> Signed-off-by: Tiezhu Yang <[email protected]> Tested-by: Sergio Paracuellos <[email protected]> Acked-by: Sergio Paracuellos <[email protected]> Signed-off-by: Thomas Bogendoerfer <[email protected]>
2021-12-08Merge branch 'kvm-on-hv-msrbm-fix' into HEADPaolo Bonzini1-2/+0
Merge bugfix for enlightened MSR Bitmap, before adding support to KVM for exposing the feature to nested guests.
2021-12-08KVM: Drop obsolete kvm_arch_vcpu_block_finish()Sean Christopherson1-1/+0
Drop kvm_arch_vcpu_block_finish() now that all arch implementations are nops. No functional change intended. Acked-by: Christian Borntraeger <[email protected]> Reviewed-by: David Matlack <[email protected]> Signed-off-by: Sean Christopherson <[email protected]> Message-Id: <[email protected]> Signed-off-by: Paolo Bonzini <[email protected]>
2021-11-29MIPS: CPS: Use bitfield helpersGeert Uytterhoeven1-12/+7
Use the FIELD_GET() helper, instead of open-coding the same operation. Signed-off-by: Geert Uytterhoeven <[email protected]> Signed-off-by: Thomas Bogendoerfer <[email protected]>
2021-11-25futex: Ensure futex_atomic_cmpxchg_inatomic() is presentArnd Bergmann1-11/+18
The boot-time detection of futex_atomic_cmpxchg_inatomic() has a bug on some 32-bit arm builds, and Thomas Gleixner suggested that setting CONFIG_HAVE_FUTEX_CMPXCHG would avoid the problem, as it is always present anyway. Looking into which other architectures could do the same showed that almost all architectures have it, the exceptions being: - some old 32-bit MIPS uniprocessor cores without ll/sc - one xtensa variant with no SMP - 32-bit SPARC when built for SMP Fix MIPS And Xtensa by rearranging the generic code to let it be used as a fallback. For SPARC, the SMP definition just ends up turning off futex anyway, so this can be done at Kconfig time instead. Note that sparc32 glibc requires the CASA instruction for its mutexes anyway, which is only available when running on SPARCv9 or LEON CPUs, but needs to be implemented in the sparc32 kernel for those. Signed-off-by: Arnd Bergmann <[email protected]> Signed-off-by: Thomas Gleixner <[email protected]> Acked-by: Max Filippov <[email protected]> Acked-by: Geert Uytterhoeven <[email protected]> Acked-by: Rich Felker <[email protected]> Link: https://lore.kernel.org/r/[email protected]
2021-11-17Add linux/cacheflush.hMatthew Wilcox (Oracle)1-2/+0
Many architectures do not include asm-generic/cacheflush.h, so turn the includes on their head and add linux/cacheflush.h which includes asm/cacheflush.h. Move the flush_dcache_folio() declaration from asm-generic/cacheflush.h to linux/cacheflush.h and change linux/highmem.h to include linux/cacheflush.h instead of asm/cacheflush.h so that all necessary places will see flush_dcache_folio(). More functions should have their default implementations moved in the future, but those are for follow-on patches. This fixes csky, sparc and sparc64 which were missed in the commit which added flush_dcache_folio(). Fixes: 08b0b0059bf1 ("mm: Add flush_dcache_folio()") Suggested-by: Christoph Hellwig <[email protected]> Signed-off-by: Matthew Wilcox (Oracle) <[email protected]> Acked-by: Geert Uytterhoeven <[email protected]>
2021-11-13Merge tag 'mips_5.16_1' of ↵Linus Torvalds1-1/+1
git://git.kernel.org/pub/scm/linux/kernel/git/mips/linux Pull more MIPS updates from Thomas Bogendoerfer: - Config updates for BMIPS platform - Build fixes - Makefile cleanups * tag 'mips_5.16_1' of git://git.kernel.org/pub/scm/linux/kernel/git/mips/linux: mips: decompressor: do not copy source files while building MIPS: boot/compressed/: add __bswapdi2() to target for ZSTD decompression MIPS: fix duplicated slashes for Platform file path MIPS: fix *-pkg builds for loongson2ef platform PCI: brcmstb: Allow building for BMIPS_GENERIC MIPS: BMIPS: Enable PCI Kconfig MIPS: VDSO: remove -nostdlib compiler flag mips: BCM63XX: ensure that CPU_SUPPORTS_32BIT_KERNEL is set MIPS: Update bmips_stb_defconfig MIPS: Allow modules to set board_be_handler
2021-11-09MIPS: Allow modules to set board_be_handlerFlorian Fainelli1-1/+1
After making the brcmstb_gisb driver modular with 707a4cdf86e5 ("bus: brcmstb_gisb: Allow building as module") Guenter reported that mips allmodconfig failed to link because board_be_handler was referenced. Thomas indicated that if we were to continue making the brcmstb_gisb driver modular for MIPS we would need to introduce a function that allows setting the board_be_handler and export that function towards modules. This is what is being done here: board_be_handler is made static and is now settable with a mips_set_be_handler() function which is exported. Reported-by: Guenter Roeck <[email protected]> Suggested-by: Thomas Bogendoerfer <[email protected]> Fixes: 707a4cdf86e5 ("bus: brcmstb_gisb: Allow building as module") Signed-off-by: Florian Fainelli <[email protected]> Tested-by: Guenter Roeck <[email protected]> Signed-off-by: Thomas Bogendoerfer <[email protected]>
2021-11-05Merge tag 'mips_5.16' of ↵Linus Torvalds39-3708/+189
git://git.kernel.org/pub/scm/linux/kernel/git/mips/linux Pull MIPS updates from Thomas Bogendoerfer: - added printing of CPU options for /proc/cpuinfo - removed support for Netlogic SOCs - fixes and cleanup * tag 'mips_5.16' of git://git.kernel.org/pub/scm/linux/kernel/git/mips/linux: MIPS: Cobalt: Explain GT64111 early PCI fixup mips: fix HUGETLB function without THP enabled mips: cm: Convert to bitfield API to fix out-of-bounds access MIPS: Remove NETLOGIC support MIPS: kernel: proc: add CPU option reporting MIPS: kernel: proc: use seq_puts instead of seq_printf MIPS: kernel: proc: fix trivial style errors MIPS: Fix assembly error from MIPSr2 code used within MIPS_ISA_ARCH_LEVEL MIPS: octeon: Remove unused functions MIPS: Loongson64: Add of_node_put() before break bcm47xx: Replace printk(KERN_ALERT ... pci_devname(dev)) with pci_alert() bcm47xx: Get rid of redundant 'else' MIPS: sni: Fix the build MIPS: Avoid macro redefinitions MIPS: loongson64: Fix no screen display during boot-up MIPS: loongson64: make CPU_LOONGSON64 depends on MIPS_FP_SUPPORT
2021-11-04Merge tag 'staging-5.16-rc1' of ↵Linus Torvalds2-2/+6
git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging Pull staging driver updates from Greg KH: "Here is the big set of staging driver updates and cleanups for 5.16-rc1. Overall we ended up removing a lot of code this time, a bit over 20,000 lines are now gone thanks to a lot of cleanup work by many developers. Nothing huge in here functionality wise, just loads of cleanups: - r8188eu driver major cleanups and removal of unused and dead code - wlan-ng minor cleanups - fbtft driver cleanups - most driver cleanups - rtl8* drivers cleanups - rts5208 driver cleanups - vt6655 driver cleanups - vc04_services drivers cleanups - wfx cleanups on the way to almost getting this merged out of staging (it's close!) - tiny mips changes needed for the mt7621 drivers, they have been acked by the respective subsystem maintainers to go through this tree. All of these have been in linux-next for a while with no reported issues" * tag 'staging-5.16-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging: (622 commits) staging: r8188eu: hal: remove goto statement and local variable staging: rtl8723bs: hal remove the assignment to itself staging: rtl8723bs: fix unmet dependency on CRYPTO for CRYPTO_LIB_ARC4 staging: vchiq_core: get rid of typedef staging: fieldbus: anybus: reframe comment to avoid warning staging: r8188eu: fix missing unlock in rtw_resume() staging: r8188eu: core: remove the goto from rtw_IOL_accquire_xmit_frame staging: r8188eu: core: remove goto statement staging: vt6655: Rename `dwAL7230InitTable` array staging: vt6655: Rename `dwAL2230PowerTable` array staging: vt6655: Rename `dwAL7230InitTableAMode` array staging: vt6655: Rename `dwAL7230ChannelTable2` array staging: vt6655: Rename `dwAL7230ChannelTable1` array staging: vt6655: Rename `dwAL7230ChannelTable0` array staging: vt6655: Rename `dwAL2230ChannelTable1` array staging: vt6655: Rename `dwAL2230ChannelTable0` array staging: r8712u: fix control-message timeout staging: rtl8192u: fix control-message timeouts staging: mt7621-dts: add missing SPDX license to files staging: vchiq_core: fix quoted strings split across lines ...
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