kernel/linux.git/arch/arm64/lib/Makefile, branch v6.12.80

arm64: crypto: use CC_FLAGS_FPU for NEON CFLAGS

2024-05-19T21:36:18+00:00

Now that CC_FLAGS_FPU is exported and can be used anywhere in the source tree, use it instead of duplicating the flags here. Link: https://lkml.kernel.org/r/20240329072441.591471-6-samuel.holland@sifive.com Signed-off-by: Samuel Holland Reviewed-by: Christoph Hellwig Acked-by: Christian König Cc: Alex Deucher Cc: Borislav Petkov (AMD) Cc: Catalin Marinas Cc: Dave Hansen Cc: Huacai Chen Cc: Ingo Molnar Cc: Jonathan Corbet Cc: Masahiro Yamada Cc: Michael Ellerman Cc: Nathan Chancellor Cc: Nicolas Schier Cc: Palmer Dabbelt Cc: Russell King Cc: Thomas Gleixner Cc: WANG Xuerui Cc: Will Deacon Signed-off-by: Andrew Morton

isystem: delete global -isystem compile option

2021-09-22T00:26:24+00:00

Further isolate kernel from userspace, prevent accidental inclusion of undesireable headers, mainly float.h and stdatomic.h. nds32 keeps -isystem globally due to intrinsics used in entrenched header. -isystem is selectively reenabled for some files, again, for intrinsics. Compile tested on: hexagon-defconfig hexagon-allmodconfig alpha-allmodconfig alpha-allnoconfig alpha-defconfig arm64-allmodconfig arm64-allnoconfig arm64-defconfig arm-am200epdkit arm-aspeed_g4 arm-aspeed_g5 arm-assabet arm-at91_dt arm-axm55xx arm-badge4 arm-bcm2835 arm-cerfcube arm-clps711x arm-cm_x300 arm-cns3420vb arm-colibri_pxa270 arm-colibri_pxa300 arm-collie arm-corgi arm-davinci_all arm-dove arm-ep93xx arm-eseries_pxa arm-exynos arm-ezx arm-footbridge arm-gemini arm-h3600 arm-h5000 arm-hackkit arm-hisi arm-imote2 arm-imx_v4_v5 arm-imx_v6_v7 arm-integrator arm-iop32x arm-ixp4xx arm-jornada720 arm-keystone arm-lart arm-lpc18xx arm-lpc32xx arm-lpd270 arm-lubbock arm-magician arm-mainstone arm-milbeaut_m10v arm-mini2440 arm-mmp2 arm-moxart arm-mps2 arm-multi_v4t arm-multi_v5 arm-multi_v7 arm-mv78xx0 arm-mvebu_v5 arm-mvebu_v7 arm-mxs arm-neponset arm-netwinder arm-nhk8815 arm-omap1 arm-omap2plus arm-orion5x arm-oxnas_v6 arm-palmz72 arm-pcm027 arm-pleb arm-pxa arm-pxa168 arm-pxa255-idp arm-pxa3xx arm-pxa910 arm-qcom arm-realview arm-rpc arm-s3c2410 arm-s3c6400 arm-s5pv210 arm-sama5 arm-shannon arm-shmobile arm-simpad arm-socfpga arm-spear13xx arm-spear3xx arm-spear6xx arm-spitz arm-stm32 arm-sunxi arm-tct_hammer arm-tegra arm-trizeps4 arm-u8500 arm-versatile arm-vexpress arm-vf610m4 arm-viper arm-vt8500_v6_v7 arm-xcep arm-zeus csky-allmodconfig csky-allnoconfig csky-defconfig h8300-edosk2674 h8300-h8300h-sim h8300-h8s-sim i386-allmodconfig i386-allnoconfig i386-defconfig ia64-allmodconfig ia64-allnoconfig ia64-bigsur ia64-generic ia64-gensparse ia64-tiger ia64-zx1 m68k-amcore m68k-amiga m68k-apollo m68k-atari m68k-bvme6000 m68k-hp300 m68k-m5208evb m68k-m5249evb m68k-m5272c3 m68k-m5275evb m68k-m5307c3 m68k-m5407c3 m68k-m5475evb m68k-mac m68k-multi m68k-mvme147 m68k-mvme16x m68k-q40 m68k-stmark2 m68k-sun3 m68k-sun3x microblaze-allmodconfig microblaze-allnoconfig microblaze-mmu mips-ar7 mips-ath25 mips-ath79 mips-bcm47xx mips-bcm63xx mips-bigsur mips-bmips_be mips-bmips_stb mips-capcella mips-cavium_octeon mips-ci20 mips-cobalt mips-cu1000-neo mips-cu1830-neo mips-db1xxx mips-decstation mips-decstation_64 mips-decstation_r4k mips-e55 mips-fuloong2e mips-gcw0 mips-generic mips-gpr mips-ip22 mips-ip27 mips-ip28 mips-ip32 mips-jazz mips-jmr3927 mips-lemote2f mips-loongson1b mips-loongson1c mips-loongson2k mips-loongson3 mips-malta mips-maltaaprp mips-malta_kvm mips-malta_qemu_32r6 mips-maltasmvp mips-maltasmvp_eva mips-maltaup mips-maltaup_xpa mips-mpc30x mips-mtx1 mips-nlm_xlp mips-nlm_xlr mips-omega2p mips-pic32mzda mips-pistachio mips-qi_lb60 mips-rb532 mips-rbtx49xx mips-rm200 mips-rs90 mips-rt305x mips-sb1250_swarm mips-tb0219 mips-tb0226 mips-tb0287 mips-vocore2 mips-workpad mips-xway nds32-allmodconfig nds32-allnoconfig nds32-defconfig nios2-10m50 nios2-3c120 nios2-allmodconfig nios2-allnoconfig openrisc-allmodconfig openrisc-allnoconfig openrisc-or1klitex openrisc-or1ksim openrisc-simple_smp parisc-allnoconfig parisc-generic-32bit parisc-generic-64bit powerpc-acadia powerpc-adder875 powerpc-akebono powerpc-amigaone powerpc-arches powerpc-asp8347 powerpc-bamboo powerpc-bluestone powerpc-canyonlands powerpc-cell powerpc-chrp32 powerpc-cm5200 powerpc-currituck powerpc-ebony powerpc-eiger powerpc-ep8248e powerpc-ep88xc powerpc-fsp2 powerpc-g5 powerpc-gamecube powerpc-ge_imp3a powerpc-holly powerpc-icon powerpc-iss476-smp powerpc-katmai powerpc-kilauea powerpc-klondike powerpc-kmeter1 powerpc-ksi8560 powerpc-linkstation powerpc-lite5200b powerpc-makalu powerpc-maple powerpc-mgcoge powerpc-microwatt powerpc-motionpro powerpc-mpc512x powerpc-mpc5200 powerpc-mpc7448_hpc2 powerpc-mpc8272_ads powerpc-mpc8313_rdb powerpc-mpc8315_rdb powerpc-mpc832x_mds powerpc-mpc832x_rdb powerpc-mpc834x_itx powerpc-mpc834x_itxgp powerpc-mpc834x_mds powerpc-mpc836x_mds powerpc-mpc836x_rdk powerpc-mpc837x_mds powerpc-mpc837x_rdb powerpc-mpc83xx powerpc-mpc8540_ads powerpc-mpc8560_ads powerpc-mpc85xx_cds powerpc-mpc866_ads powerpc-mpc885_ads powerpc-mvme5100 powerpc-obs600 powerpc-pasemi powerpc-pcm030 powerpc-pmac32 powerpc-powernv powerpc-ppa8548 powerpc-ppc40x powerpc-ppc44x powerpc-ppc64 powerpc-ppc64e powerpc-ppc6xx powerpc-pq2fads powerpc-ps3 powerpc-pseries powerpc-rainier powerpc-redwood powerpc-sam440ep powerpc-sbc8548 powerpc-sequoia powerpc-skiroot powerpc-socrates powerpc-storcenter powerpc-stx_gp3 powerpc-taishan powerpc-tqm5200 powerpc-tqm8540 powerpc-tqm8541 powerpc-tqm8548 powerpc-tqm8555 powerpc-tqm8560 powerpc-tqm8xx powerpc-walnut powerpc-warp powerpc-wii powerpc-xes_mpc85xx riscv-allmodconfig riscv-allnoconfig riscv-nommu_k210 riscv-nommu_k210_sdcard riscv-nommu_virt riscv-rv32 s390-allmodconfig s390-allnoconfig s390-debug s390-zfcpdump sh-ap325rxa sh-apsh4a3a sh-apsh4ad0a sh-dreamcast sh-ecovec24 sh-ecovec24-romimage sh-edosk7705 sh-edosk7760 sh-espt sh-hp6xx sh-j2 sh-kfr2r09 sh-kfr2r09-romimage sh-landisk sh-lboxre2 sh-magicpanelr2 sh-microdev sh-migor sh-polaris sh-r7780mp sh-r7785rp sh-rsk7201 sh-rsk7203 sh-rsk7264 sh-rsk7269 sh-rts7751r2d1 sh-rts7751r2dplus sh-sdk7780 sh-sdk7786 sh-se7206 sh-se7343 sh-se7619 sh-se7705 sh-se7712 sh-se7721 sh-se7722 sh-se7724 sh-se7750 sh-se7751 sh-se7780 sh-secureedge5410 sh-sh03 sh-sh2007 sh-sh7710voipgw sh-sh7724_generic sh-sh7757lcr sh-sh7763rdp sh-sh7770_generic sh-sh7785lcr sh-sh7785lcr_32bit sh-shmin sh-shx3 sh-titan sh-ul2 sh-urquell sparc-allmodconfig sparc-allnoconfig sparc-sparc32 sparc-sparc64 um-i386-allmodconfig um-i386-allnoconfig um-i386-defconfig um-x86_64-allmodconfig um-x86_64-allnoconfig x86_64-allmodconfig x86_64-allnoconfig x86_64-defconfig xtensa-allmodconfig xtensa-allnoconfig xtensa-audio_kc705 xtensa-cadence_csp xtensa-common xtensa-generic_kc705 xtensa-iss xtensa-nommu_kc705 xtensa-smp_lx200 xtensa-virt xtensa-xip_kc705 Tested-by: Nathan Chancellor # build (hexagon) Signed-off-by: Alexey Dobriyan Acked-by: Ard Biesheuvel Signed-off-by: Masahiro Yamada

arch: remove compat_alloc_user_space

2021-09-08T22:32:35+00:00

All users of compat_alloc_user_space() and copy_in_user() have been removed from the kernel, only a few functions in sparc remain that can be changed to calling arch_copy_in_user() instead. Link: https://lkml.kernel.org/r/20210727144859.4150043-7-arnd@kernel.org Signed-off-by: Arnd Bergmann Reviewed-by: Christoph Hellwig Cc: Al Viro Cc: Benjamin Herrenschmidt Cc: Borislav Petkov Cc: Catalin Marinas Cc: Christian Borntraeger Cc: Christoph Hellwig Cc: "David S. Miller" Cc: Eric Biederman Cc: Feng Tang Cc: Heiko Carstens Cc: Helge Deller Cc: "H. Peter Anvin" Cc: Ingo Molnar Cc: "James E.J. Bottomley" Cc: Michael Ellerman Cc: Paul Mackerras Cc: Thomas Bogendoerfer Cc: Thomas Gleixner Cc: Vasily Gorbik Cc: Will Deacon Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

Merge branch 'for-next/kasan' into for-next/core

2021-06-24T13:04:00+00:00

Optimise out-of-line KASAN checking when using software tagging. * for-next/kasan: kasan: arm64: support specialized outlined tag mismatch checks

Merge branch 'for-next/insn' into for-next/core

2021-06-24T13:03:24+00:00

Refactoring of our instruction decoding routines and addition of some missing encodings. * for-next/insn: arm64: insn: avoid circular include dependency arm64: insn: move AARCH64_INSN_SIZE into arm64: insn: decouple patching from insn code arm64: insn: Add load/store decoding helpers arm64: insn: Add some opcodes to instruction decoder arm64: insn: Add barrier encodings arm64: insn: Add SVE instruction class arm64: Move instruction encoder/decoder under lib/ arm64: Move aarch32 condition check functions arm64: Move patching utilities out of instruction encoding/decoding

arm64: Import latest memcpy()/memmove() implementation

2021-06-01T17:34:38+00:00

Import the latest implementation of memcpy(), based on the upstream code of string/aarch64/memcpy.S at commit afd6244 from https://github.com/ARM-software/optimized-routines, and subsuming memmove() in the process. Note that for simplicity Arm have chosen to contribute this code to Linux under GPLv2 rather than the original MIT license. Note also that the needs of the usercopy routines vs. regular memcpy() have now diverged so far that we abandon the shared template idea and the damage which that incurred to the tuning of LDP/STP loops. We'll be back to tackle those routines separately in future. Signed-off-by: Robin Murphy Link: https://lore.kernel.org/r/3c953af43506581b2422f61952261e76949ba711.1622128527.git.robin.murphy@arm.com Signed-off-by: Will Deacon

arm64: Move instruction encoder/decoder under lib/

2021-05-27T16:38:30+00:00

Aarch64 instruction set encoding and decoding logic can prove useful for some features/tools both part of the kernel and outside the kernel. Isolate the function dealing only with encoding/decoding instructions, with minimal dependency on kernel utilities in order to be able to reuse that code. Code was only moved, no code should have been added, removed nor modifier. Signed-off-by: Julien Thierry Link: https://lore.kernel.org/r/20210303170536.1838032-5-jthierry@redhat.com Signed-off-by: Will Deacon

kasan: arm64: support specialized outlined tag mismatch checks

2021-05-26T22:31:26+00:00

By using outlined checks we can achieve a significant code size improvement by moving the tag-based ASAN checks into separate functions. Unlike the existing CONFIG_KASAN_OUTLINE mode these functions have a custom calling convention that preserves most registers and is specialized to the register containing the address and the type of access, and as a result we can eliminate the code size and performance overhead of a standard calling convention such as AAPCS for these functions. This change depends on a separate series of changes to Clang [1] to support outlined checks in the kernel, although the change works fine without them (we just don't get outlined checks). This is because the flag -mllvm -hwasan-inline-all-checks=0 has no effect until the Clang changes land. The flag was introduced in the Clang 9.0 timeframe as part of the support for outlined checks in userspace and because our minimum Clang version is 10.0 we can pass it unconditionally. Outlined checks require a new runtime function with a custom calling convention. Add this function to arch/arm64/lib. I measured the code size of defconfig + tag-based KASAN, as well as boot time (i.e. time to init launch) on a DragonBoard 845c with an Android arm64 GKI kernel. The results are below: code size boot time CONFIG_KASAN_INLINE=y before 92824064 6.18s CONFIG_KASAN_INLINE=y after 38822400 6.65s CONFIG_KASAN_OUTLINE=y 39215616 11.48s We can see straight away that specialized outlined checks beat the existing CONFIG_KASAN_OUTLINE=y on both code size and boot time for tag-based ASAN. As for the comparison between CONFIG_KASAN_INLINE=y before and after we saw similar performance numbers in userspace [2] and decided that since the performance overhead is minimal compared to the overhead of tag-based ASAN itself as well as compared to the code size improvements we would just replace the inlined checks with the specialized outlined checks without the option to select between them, and that is what I have implemented in this patch. Signed-off-by: Peter Collingbourne Acked-by: Andrey Konovalov Reviewed-by: Mark Rutland Tested-by: Mark Rutland Link: https://linux-review.googlesource.com/id/I1a30036c70ab3c3ee78d75ed9b87ef7cdc3fdb76 Link: [1] https://reviews.llvm.org/D90426 Link: [2] https://reviews.llvm.org/D56954 Link: https://lore.kernel.org/r/20210526174927.2477847-3-pcc@google.com Signed-off-by: Will Deacon

arm64: mte: Clear the tags when a page is mapped in user-space with PROT_MTE

2020-09-04T11:46:06+00:00

Pages allocated by the kernel are not guaranteed to have the tags zeroed, especially as the kernel does not (yet) use MTE itself. To ensure the user can still access such pages when mapped into its address space, clear the tags via set_pte_at(). A new page flag - PG_mte_tagged (PG_arch_2) - is used to track pages with valid allocation tags. Since the zero page is mapped as pte_special(), it won't be covered by the above set_pte_at() mechanism. Clear its tags during early MTE initialisation. Co-developed-by: Steven Price Signed-off-by: Steven Price Signed-off-by: Catalin Marinas Cc: Will Deacon

arm64: Implement optimised checksum routine

2020-01-16T15:23:29+00:00

Apparently there exist certain workloads which rely heavily on software checksumming, for which the generic do_csum() implementation becomes a significant bottleneck. Therefore let's give arm64 its own optimised version - for ease of maintenance this foregoes assembly or intrisics, and is thus not actually arm64-specific, but does rely heavily on C idioms that translate well to the A64 ISA and the typical load/store capabilities of most ARMv8 CPU cores. The resulting increase in checksum throughput scales nicely with buffer size, tending towards 4x for a small in-order core (Cortex-A53), and up to 6x or more for an aggressive big core (Ampere eMAG). Reported-by: Lingyan Huang Tested-by: Lingyan Huang Signed-off-by: Robin Murphy Signed-off-by: Will Deacon