September 2019 - Linux-kselftest-mirror

[PATCH 0/7] firmware: add partial read support in request_firmware_into_buf

by Scott Branden

This patch series adds partial read support in request_firmware_into_buf. In order to accept the enhanced API it has been requested that kernel selftests and upstreamed driver utilize the API enhancement and so are included in this patch series. Also, no tests existed for existing request_firmware_into_buf kernel API. Therefore tests have been created and submitted upstream here: "[PATCH v2 0/2] firmware: selftest for request_firmware_into_buf" https://lkml.org/lkml/2019/8/22/1367 The firmware selftests patches here require those patches to be applied first in order for the firmware selftest patches in this series to be valid. Finally, in this patch series is the addition of a new Broadcom Valkyrie driver utilizing the new request_firmware_into_buf enhanced API. Scott Branden (7): fs: introduce kernel_pread_file* support firmware: add offset to request_firmware_into_buf test_firmware: add partial read support for request_firmware_into_buf selftests: firmware: Test partial file reads of request_firmware_into_buf bcm-vk: add bcm_vk UAPI misc: bcm-vk: add Broadcom Valkyrie driver MAINTAINERS: bcm-vk: Add maintainer for Broadcom Valkyrie Driver MAINTAINERS | 7 + drivers/base/firmware_loader/firmware.h | 5 + drivers/base/firmware_loader/main.c | 49 +- drivers/misc/Kconfig | 1 + drivers/misc/Makefile | 1 + drivers/misc/bcm-vk/Kconfig | 16 + drivers/misc/bcm-vk/Makefile | 7 + drivers/misc/bcm-vk/README | 29 + drivers/misc/bcm-vk/bcm_vk.h | 229 +++ drivers/misc/bcm-vk/bcm_vk_dev.c | 1558 +++++++++++++++++ drivers/misc/bcm-vk/bcm_vk_msg.c | 963 ++++++++++ drivers/misc/bcm-vk/bcm_vk_msg.h | 169 ++ drivers/misc/bcm-vk/bcm_vk_sg.c | 273 +++ drivers/misc/bcm-vk/bcm_vk_sg.h | 60 + drivers/soc/qcom/mdt_loader.c | 7 +- fs/exec.c | 77 +- include/linux/firmware.h | 8 +- include/linux/fs.h | 15 + include/uapi/linux/misc/bcm_vk.h | 88 + lib/test_firmware.c | 139 +- .../selftests/firmware/fw_filesystem.sh | 80 + 21 files changed, 3744 insertions(+), 37 deletions(-) create mode 100644 drivers/misc/bcm-vk/Kconfig create mode 100644 drivers/misc/bcm-vk/Makefile create mode 100644 drivers/misc/bcm-vk/README create mode 100644 drivers/misc/bcm-vk/bcm_vk.h create mode 100644 drivers/misc/bcm-vk/bcm_vk_dev.c create mode 100644 drivers/misc/bcm-vk/bcm_vk_msg.c create mode 100644 drivers/misc/bcm-vk/bcm_vk_msg.h create mode 100644 drivers/misc/bcm-vk/bcm_vk_sg.c create mode 100644 drivers/misc/bcm-vk/bcm_vk_sg.h create mode 100644 include/uapi/linux/misc/bcm_vk.h -- 2.17.1

4 years, 2 months

7
35
0 0

[PATCH v2 0/8] vdso: Complete the conversion to 32bit syscalls

by Vincenzo Frascino

This patch series is a follow up to "lib/vdso, x86/vdso: Fix fallout from generic VDSO conversion" [1]. The main purpose is to complete the 32bit vDSOs conversion to use the legacy 32bit syscalls as a fallback. With the conversion of all the architectures present in -next complete, this patch series removes as well the conditional choice in between 32 and 64 bit for 32bit vDSOs. This series has been rebased on linux-next/master. [1] https://lkml.org/lkml/2019/7/28/86 Cc: Catalin Marinas <catalin.marinas(a)arm.com> Cc: Will Deacon <will(a)kernel.org> Cc: Paul Burton <paul.burton(a)mips.com> Cc: Thomas Gleixner <tglx(a)linutronix.de> Cc: Dmitry Safonov <0x7f454c46(a)gmail.com> Cc: Andy Lutomirski <luto(a)kernel.org> Signed-off-by: Vincenzo Frascino <vincenzo.frascino(a)arm.com> Vincenzo Frascino (8): arm64: compat: vdso: Expose BUILD_VDSO32 lib: vdso: Build 32 bit specific functions in the right context mips: compat: vdso: Use legacy syscalls as fallback lib: vdso: Remove VDSO_HAS_32BIT_FALLBACK lib: vdso: Remove checks on return value for 32 bit vDSO arm64: compat: vdso: Remove unused VDSO_HAS_32BIT_FALLBACK mips: vdso: Remove unused VDSO_HAS_32BIT_FALLBACK x86: vdso: Remove unused VDSO_HAS_32BIT_FALLBACK .../include/asm/vdso/compat_gettimeofday.h | 2 +- arch/mips/include/asm/vdso/gettimeofday.h | 43 +++++++++++++++++++ arch/mips/vdso/config-n32-o32-env.c | 1 + arch/x86/include/asm/vdso/gettimeofday.h | 2 - lib/vdso/gettimeofday.c | 30 ++++++------- 5 files changed, 57 insertions(+), 21 deletions(-) -- 2.23.0

4 years, 3 months

4
22
0 0

[PATCH v7 00/25] Unify vDSOs across more architectures

by Vincenzo Frascino

vDSO (virtual dynamic shared object) is a mechanism that the Linux kernel provides as an alternative to system calls to reduce where possible the costs in terms of cycles. This is possible because certain syscalls like gettimeofday() do not write any data and return one or more values that are stored in the kernel, which makes relatively safe calling them directly as a library function. Even if the mechanism is pretty much standard, every architecture in the last few years ended up implementing their own vDSO library in the architectural code. The purpose of this patch-set is to identify the commonalities in between the architectures and try to consolidate the common code paths, starting with gettimeofday(). This implementation contains the following design choices: * Every architecture defines the arch specific code in an header in "asm/vdso/". * The generic implementation includes the arch specific one and lives in "lib/vdso". * The arch specific code for gettimeofday lives in "<arch path>/vdso/gettimeofday.c" and includes the generic code only. * The generic implementation of update_vsyscall and update_vsyscall_tz lives in kernel/vdso and provide the bindings that can be implemented by each architecture. * Each architecture provides its implementation of the bindings in "asm/vdso/vsyscall.h". * This approach allows to consolidate the common code in a single place with the benefit of avoiding code duplication. This implementation contains the portings to the common library for: arm64, compat mode for arm64, arm, mips, x86_64, x32, compat mode for x86_64 and i386. The mips porting has been tested on qemu for mips32el. A configuration to repeat the tests can be found at [4]. The x86_64 porting has been tested on an Intel Xeon 5120T based machine running Ubuntu 18.04 and using the Ubuntu provided defconfig. The i386 porting has been tested on qemu using the i386_defconfig configuration. Last but not least from this porting arm64, compat arm64, arm and mips gain the support for: * CLOCK_BOOTTIME that can be useful in certain scenarios since it keeps track of the time during sleep as well. * CLOCK_TAI that is like CLOCK_REALTIME, but uses the International Atomic Time (TAI) reference instead of UTC to avoid jumping on leap second updates. for both clock_gettime and clock_getres. The porting has been validated using the vdsotest test-suite [1] extended to cover all the clock ids [2]. A new test has been added to the linux kselftest in order to validate the newly added library. The porting has been benchmarked and the performance results are provided as part of this cover letter. To simplify the testing, a copy of the patchset on top of a recent linux tree can be found at [3] and [4]. The v7 of this patchseries has been rebased on [5]. [1] https://github.com/nathanlynch/vdsotest [2] https://github.com/fvincenzo/vdsotest [3] git://linux-arm.org/linux-vf.git vdso/v7 [4] git://linux-arm.org/linux-vf.git vdso-mips/v7 [5] git://git.kernel.org/pub/scm/linux/kernel/git/hyperv/linux.git hyperv-next Changes: -------- v7: - Rebased on [5] (5.2-rc3). - Added performance numbers for arm64 provided by Shijith Thotton. - Aimed at 1:1 replacement for pre-exisiting vDSO libraries. - Provided separate patches for newly added API. - Addressed review comments. v6: - Rebased on 5.2-rc2. - Added performance numbers. - Removed vdso_types.h. - Unified update_vsyscall and update_vsyscall_tz. - Reworked the kselftest included in this patchset. - Addressed review comments. v5: - Rebased on 5.0-rc7. - Added x86_64, compat mode for x86_64 and i386 portings. - Extended vDSO kselftest. - Addressed review comments. v4: - Rebased on 5.0-rc2. - Addressed review comments. - Disabled compat vdso on arm64 when the kernel is compiled with clang. v3: - Ported the latest fixes and optimizations done on the x86 architecture to the generic library. - Addressed review comments. - Improved the documentation of the interfaces. - Changed the HAVE_ARCH_TIMER config option to a more generic HAVE_HW_COUNTER. v2: - Added -ffixed-x18 to arm64 - Repleced occurrences of timeval and timespec - Modified datapage.h to be compliant with y2038 on all the architectures - Removed __u_vdso type Cc: Catalin Marinas <catalin.marinas(a)arm.com> Cc: Will Deacon <will.deacon(a)arm.com> Cc: Arnd Bergmann <arnd(a)arndb.de> Cc: Russell King <linux(a)armlinux.org.uk> Cc: Ralf Baechle <ralf(a)linux-mips.org> Cc: Paul Burton <paul.burton(a)mips.com> Cc: Daniel Lezcano <daniel.lezcano(a)linaro.org> Cc: Thomas Gleixner <tglx(a)linutronix.de> Cc: Mark Salyzyn <salyzyn(a)android.com> Cc: Peter Collingbourne <pcc(a)google.com> Cc: Shuah Khan <shuah(a)kernel.org> Cc: Dmitry Safonov <0x7f454c46(a)gmail.com> Cc: Rasmus Villemoes <linux(a)rasmusvillemoes.dk> Cc: Huw Davies <huw(a)codeweavers.com> Cc: Shijith Thotton <sthotton(a)marvell.com> Cc: Andre Przywara <andre.przywara(a)arm.com> Signed-off-by: Vincenzo Frascino <vincenzo.frascino(a)arm.com> Tested-by: Shijith Thotton <sthotton(a)marvell.com> Tested-by: Andre Przywara <andre.przywara(a)arm.com> Performance Numbers: Linux 5.2.0-rc2 - Xeon Gold 5120T ====================================================== Unified vDSO: ------------- clock-gettime-monotonic: syscall: 342 nsec/call clock-gettime-monotonic: libc: 25 nsec/call clock-gettime-monotonic: vdso: 24 nsec/call clock-getres-monotonic: syscall: 296 nsec/call clock-getres-monotonic: libc: 296 nsec/call clock-getres-monotonic: vdso: 3 nsec/call clock-gettime-monotonic-coarse: syscall: 294 nsec/call clock-gettime-monotonic-coarse: libc: 5 nsec/call clock-gettime-monotonic-coarse: vdso: 5 nsec/call clock-getres-monotonic-coarse: syscall: 295 nsec/call clock-getres-monotonic-coarse: libc: 292 nsec/call clock-getres-monotonic-coarse: vdso: 5 nsec/call clock-gettime-monotonic-raw: syscall: 343 nsec/call clock-gettime-monotonic-raw: libc: 25 nsec/call clock-gettime-monotonic-raw: vdso: 23 nsec/call clock-getres-monotonic-raw: syscall: 290 nsec/call clock-getres-monotonic-raw: libc: 290 nsec/call clock-getres-monotonic-raw: vdso: 4 nsec/call clock-gettime-tai: syscall: 332 nsec/call clock-gettime-tai: libc: 24 nsec/call clock-gettime-tai: vdso: 23 nsec/call clock-getres-tai: syscall: 288 nsec/call clock-getres-tai: libc: 288 nsec/call clock-getres-tai: vdso: 3 nsec/call clock-gettime-boottime: syscall: 342 nsec/call clock-gettime-boottime: libc: 24 nsec/call clock-gettime-boottime: vdso: 23 nsec/call clock-getres-boottime: syscall: 284 nsec/call clock-getres-boottime: libc: 291 nsec/call clock-getres-boottime: vdso: 3 nsec/call clock-gettime-realtime: syscall: 337 nsec/call clock-gettime-realtime: libc: 24 nsec/call clock-gettime-realtime: vdso: 23 nsec/call clock-getres-realtime: syscall: 287 nsec/call clock-getres-realtime: libc: 284 nsec/call clock-getres-realtime: vdso: 3 nsec/call clock-gettime-realtime-coarse: syscall: 307 nsec/call clock-gettime-realtime-coarse: libc: 4 nsec/call clock-gettime-realtime-coarse: vdso: 4 nsec/call clock-getres-realtime-coarse: syscall: 294 nsec/call clock-getres-realtime-coarse: libc: 291 nsec/call clock-getres-realtime-coarse: vdso: 4 nsec/call getcpu: syscall: 246 nsec/call getcpu: libc: 14 nsec/call getcpu: vdso: 11 nsec/call gettimeofday: syscall: 293 nsec/call gettimeofday: libc: 26 nsec/call gettimeofday: vdso: 25 nsec/call Stock Kernel: ------------- clock-gettime-monotonic: syscall: 338 nsec/call clock-gettime-monotonic: libc: 24 nsec/call clock-gettime-monotonic: vdso: 23 nsec/call clock-getres-monotonic: syscall: 291 nsec/call clock-getres-monotonic: libc: 304 nsec/call clock-getres-monotonic: vdso: not tested Note: vDSO version of clock_getres not found clock-gettime-monotonic-coarse: syscall: 297 nsec/call clock-gettime-monotonic-coarse: libc: 5 nsec/call clock-gettime-monotonic-coarse: vdso: 4 nsec/call clock-getres-monotonic-coarse: syscall: 281 nsec/call clock-getres-monotonic-coarse: libc: 286 nsec/call clock-getres-monotonic-coarse: vdso: not tested Note: vDSO version of clock_getres not found clock-gettime-monotonic-raw: syscall: 336 nsec/call clock-gettime-monotonic-raw: libc: 340 nsec/call clock-gettime-monotonic-raw: vdso: 346 nsec/call clock-getres-monotonic-raw: syscall: 297 nsec/call clock-getres-monotonic-raw: libc: 301 nsec/call clock-getres-monotonic-raw: vdso: not tested Note: vDSO version of clock_getres not found clock-gettime-tai: syscall: 351 nsec/call clock-gettime-tai: libc: 24 nsec/call clock-gettime-tai: vdso: 23 nsec/call clock-getres-tai: syscall: 298 nsec/call clock-getres-tai: libc: 290 nsec/call clock-getres-tai: vdso: not tested Note: vDSO version of clock_getres not found clock-gettime-boottime: syscall: 342 nsec/call clock-gettime-boottime: libc: 347 nsec/call clock-gettime-boottime: vdso: 355 nsec/call clock-getres-boottime: syscall: 296 nsec/call clock-getres-boottime: libc: 295 nsec/call clock-getres-boottime: vdso: not tested Note: vDSO version of clock_getres not found clock-gettime-realtime: syscall: 346 nsec/call clock-gettime-realtime: libc: 24 nsec/call clock-gettime-realtime: vdso: 22 nsec/call clock-getres-realtime: syscall: 295 nsec/call clock-getres-realtime: libc: 291 nsec/call clock-getres-realtime: vdso: not tested Note: vDSO version of clock_getres not found clock-gettime-realtime-coarse: syscall: 292 nsec/call clock-gettime-realtime-coarse: libc: 5 nsec/call clock-gettime-realtime-coarse: vdso: 4 nsec/call clock-getres-realtime-coarse: syscall: 300 nsec/call clock-getres-realtime-coarse: libc: 301 nsec/call clock-getres-realtime-coarse: vdso: not tested Note: vDSO version of clock_getres not found getcpu: syscall: 252 nsec/call getcpu: libc: 14 nsec/call getcpu: vdso: 11 nsec/call gettimeofday: syscall: 293 nsec/call gettimeofday: libc: 24 nsec/call gettimeofday: vdso: 25 nsec/call Performance Numbers: Linux 5.2.0-rc2 - ThunderX2 (arm64) ======================================================== Provided by: Shijith Thotton <sthotton(a)marvell.com> Unified vDSO: ------------- clock-gettime-monotonic: syscall: 346 nsec/call clock-gettime-monotonic: libc: 38 nsec/call clock-gettime-monotonic: vdso: 36 nsec/call clock-getres-monotonic: syscall: 262 nsec/call clock-getres-monotonic: libc: 6 nsec/call clock-getres-monotonic: vdso: 5 nsec/call clock-gettime-monotonic-coarse: syscall: 296 nsec/call clock-gettime-monotonic-coarse: libc: 39 nsec/call clock-gettime-monotonic-coarse: vdso: 38 nsec/call clock-getres-monotonic-coarse: syscall: 260 nsec/call clock-getres-monotonic-coarse: libc: 8 nsec/call clock-getres-monotonic-coarse: vdso: 5 nsec/call clock-gettime-monotonic-raw: syscall: 345 nsec/call clock-gettime-monotonic-raw: libc: 35 nsec/call clock-gettime-monotonic-raw: vdso: 34 nsec/call clock-getres-monotonic-raw: syscall: 261 nsec/call clock-getres-monotonic-raw: libc: 7 nsec/call clock-getres-monotonic-raw: vdso: 5 nsec/call clock-gettime-tai: syscall: 357 nsec/call clock-gettime-tai: libc: 38 nsec/call clock-gettime-tai: vdso: 36 nsec/call clock-getres-tai: syscall: 257 nsec/call clock-getres-tai: libc: 7 nsec/call clock-getres-tai: vdso: 5 nsec/call clock-gettime-boottime: syscall: 356 nsec/call clock-gettime-boottime: libc: 38 nsec/call clock-gettime-boottime: vdso: 36 nsec/call clock-getres-boottime: syscall: 257 nsec/call clock-getres-boottime: libc: 6 nsec/call clock-getres-boottime: vdso: 5 nsec/call clock-gettime-realtime: syscall: 345 nsec/call clock-gettime-realtime: libc: 38 nsec/call clock-gettime-realtime: vdso: 36 nsec/call clock-getres-realtime: syscall: 257 nsec/call clock-getres-realtime: libc: 7 nsec/call clock-getres-realtime: vdso: 5 nsec/call clock-gettime-realtime-coarse: syscall: 295 nsec/call clock-gettime-realtime-coarse: libc: 39 nsec/call clock-gettime-realtime-coarse: vdso: 38 nsec/call clock-getres-realtime-coarse: syscall: 260 nsec/call clock-getres-realtime-coarse: libc: 8 nsec/call clock-getres-realtime-coarse: vdso: 5 nsec/call getcpu: syscall: 244 nsec/call getcpu: libc: 247 nsec/call getcpu: vdso: not tested Note: vDSO version of getcpu not found gettimeofday: syscall: 383 nsec/call gettimeofday: libc: 39 nsec/call gettimeofday: vdso: 35 nsec/call Stock Kernel: ------------- clock-gettime-monotonic: syscall: 344 nsec/call clock-gettime-monotonic: libc: 74 nsec/call clock-gettime-monotonic: vdso: 73 nsec/call clock-getres-monotonic: syscall: 258 nsec/call clock-getres-monotonic: libc: 6 nsec/call clock-getres-monotonic: vdso: 4 nsec/call clock-gettime-monotonic-coarse: syscall: 300 nsec/call clock-gettime-monotonic-coarse: libc: 36 nsec/call clock-gettime-monotonic-coarse: vdso: 34 nsec/call clock-getres-monotonic-coarse: syscall: 261 nsec/call clock-getres-monotonic-coarse: libc: 6 nsec/call clock-getres-monotonic-coarse: vdso: 4 nsec/call clock-gettime-monotonic-raw: syscall: 346 nsec/call clock-gettime-monotonic-raw: libc: 74 nsec/call clock-gettime-monotonic-raw: vdso: 72 nsec/call clock-getres-monotonic-raw: syscall: 254 nsec/call clock-getres-monotonic-raw: libc: 6 nsec/call clock-getres-monotonic-raw: vdso: 4 nsec/call clock-gettime-tai: syscall: 345 nsec/call clock-gettime-tai: libc: 361 nsec/call clock-gettime-tai: vdso: 359 nsec/call clock-getres-tai: syscall: 259 nsec/call clock-getres-tai: libc: 262 nsec/call clock-getres-tai: vdso: 258 nsec/call clock-gettime-boottime: syscall: 353 nsec/call clock-gettime-boottime: libc: 365 nsec/call clock-gettime-boottime: vdso: 362 nsec/call clock-getres-boottime: syscall: 260 nsec/call clock-getres-boottime: libc: 267 nsec/call clock-getres-boottime: vdso: 259 nsec/call clock-gettime-realtime: syscall: 344 nsec/call clock-gettime-realtime: libc: 73 nsec/call clock-gettime-realtime: vdso: 72 nsec/call clock-getres-realtime: syscall: 255 nsec/call clock-getres-realtime: libc: 7 nsec/call clock-getres-realtime: vdso: 4 nsec/call clock-gettime-realtime-coarse: syscall: 296 nsec/call clock-gettime-realtime-coarse: libc: 35 nsec/call clock-gettime-realtime-coarse: vdso: 33 nsec/call clock-getres-realtime-coarse: syscall: 258 nsec/call clock-getres-realtime-coarse: libc: 6 nsec/call clock-getres-realtime-coarse: vdso: 4 nsec/call getcpu: syscall: 237 nsec/call getcpu: libc: 242 nsec/call getcpu: vdso: not tested Note: vDSO version of getcpu not found gettimeofday: syscall: 378 nsec/call gettimeofday: libc: 73 nsec/call gettimeofday: vdso: 70 nsec/call Peter Collingbourne (1): arm64: Build vDSO with -ffixed-x18 Vincenzo Frascino (24): kernel: Standardize vdso_datapage kernel: Define gettimeofday vdso common code kernel: Unify update_vsyscall implementation arm64: Substitute gettimeofday with C implementation arm64: compat: Add missing syscall numbers arm64: compat: Expose signal related structures arm64: compat: Generate asm offsets for signals lib: vdso: Add compat support arm64: compat: Add vDSO arm64: Refactor vDSO code arm64: compat: vDSO setup for compat layer arm64: elf: vDSO code page discovery arm64: compat: Get sigreturn trampolines from vDSO arm64: Add vDSO compat support arm: Add support for generic vDSO arm: Add clock_getres entry point arm: Add clock_gettime64 entry point mips: Add support for generic vDSO mips: Add clock_getres entry point mips: Add clock_gettime64 entry point x86: Add support for generic vDSO x86: Add clock_getres entry point x86: Add clock_gettime64 entry point kselftest: Extend vDSO selftest arch/arm/Kconfig | 3 + arch/arm/include/asm/vdso/gettimeofday.h | 94 +++++ arch/arm/include/asm/vdso/vsyscall.h | 71 ++++ arch/arm/include/asm/vdso_datapage.h | 29 +- arch/arm/kernel/vdso.c | 87 +---- arch/arm/vdso/Makefile | 13 +- arch/arm/vdso/note.c | 15 + arch/arm/vdso/vdso.lds.S | 2 + arch/arm/vdso/vgettimeofday.c | 256 +------------ arch/arm64/Kconfig | 3 + arch/arm64/Makefile | 23 +- arch/arm64/include/asm/elf.h | 14 + arch/arm64/include/asm/signal32.h | 46 +++ arch/arm64/include/asm/unistd.h | 5 + arch/arm64/include/asm/vdso.h | 3 + arch/arm64/include/asm/vdso/compat_barrier.h | 51 +++ .../include/asm/vdso/compat_gettimeofday.h | 110 ++++++ arch/arm64/include/asm/vdso/gettimeofday.h | 86 +++++ arch/arm64/include/asm/vdso/vsyscall.h | 53 +++ arch/arm64/include/asm/vdso_datapage.h | 48 --- arch/arm64/kernel/Makefile | 6 +- arch/arm64/kernel/asm-offsets.c | 39 +- arch/arm64/kernel/signal32.c | 72 ++-- arch/arm64/kernel/vdso.c | 356 ++++++++++++------ arch/arm64/kernel/vdso/Makefile | 34 +- arch/arm64/kernel/vdso/gettimeofday.S | 334 ---------------- arch/arm64/kernel/vdso/vgettimeofday.c | 28 ++ arch/arm64/kernel/vdso32/.gitignore | 2 + arch/arm64/kernel/vdso32/Makefile | 186 +++++++++ arch/arm64/kernel/vdso32/note.c | 15 + arch/arm64/kernel/vdso32/sigreturn.S | 62 +++ arch/arm64/kernel/vdso32/vdso.S | 19 + arch/arm64/kernel/vdso32/vdso.lds.S | 82 ++++ arch/arm64/kernel/vdso32/vgettimeofday.c | 59 +++ arch/mips/Kconfig | 2 + arch/mips/include/asm/vdso.h | 78 +--- arch/mips/include/asm/vdso/gettimeofday.h | 177 +++++++++ arch/mips/{ => include/asm}/vdso/vdso.h | 6 +- arch/mips/include/asm/vdso/vsyscall.h | 43 +++ arch/mips/kernel/vdso.c | 37 +- arch/mips/vdso/Makefile | 27 +- arch/mips/vdso/elf.S | 2 +- arch/mips/vdso/sigreturn.S | 2 +- arch/mips/vdso/vdso.lds.S | 4 + arch/mips/vdso/vgettimeofday.c | 58 +++ arch/x86/Kconfig | 3 + arch/x86/entry/vdso/Makefile | 9 + arch/x86/entry/vdso/vclock_gettime.c | 249 +++--------- arch/x86/entry/vdso/vdso.lds.S | 2 + arch/x86/entry/vdso/vdso32/vdso32.lds.S | 2 + arch/x86/entry/vdso/vdsox32.lds.S | 1 + arch/x86/entry/vsyscall/Makefile | 2 - arch/x86/entry/vsyscall/vsyscall_gtod.c | 83 ---- arch/x86/include/asm/pvclock.h | 2 +- arch/x86/include/asm/vdso/gettimeofday.h | 205 ++++++++++ arch/x86/include/asm/vdso/vsyscall.h | 44 +++ arch/x86/include/asm/vgtod.h | 75 +--- arch/x86/include/asm/vvar.h | 7 +- arch/x86/kernel/pvclock.c | 1 + include/asm-generic/vdso/vsyscall.h | 56 +++ include/linux/hrtimer.h | 15 +- include/linux/hrtimer_defs.h | 25 ++ include/linux/timekeeper_internal.h | 9 + include/vdso/datapage.h | 93 +++++ include/vdso/helpers.h | 56 +++ include/vdso/vsyscall.h | 11 + kernel/Makefile | 1 + kernel/vdso/Makefile | 2 + kernel/vdso/vsyscall.c | 131 +++++++ lib/Kconfig | 5 + lib/vdso/Kconfig | 36 ++ lib/vdso/Makefile | 22 ++ lib/vdso/gettimeofday.c | 231 ++++++++++++ tools/testing/selftests/vDSO/Makefile | 2 + tools/testing/selftests/vDSO/vdso_config.h | 90 +++++ tools/testing/selftests/vDSO/vdso_full_test.c | 244 ++++++++++++ 76 files changed, 3044 insertions(+), 1412 deletions(-) create mode 100644 arch/arm/include/asm/vdso/gettimeofday.h create mode 100644 arch/arm/include/asm/vdso/vsyscall.h create mode 100644 arch/arm/vdso/note.c create mode 100644 arch/arm64/include/asm/vdso/compat_barrier.h create mode 100644 arch/arm64/include/asm/vdso/compat_gettimeofday.h create mode 100644 arch/arm64/include/asm/vdso/gettimeofday.h create mode 100644 arch/arm64/include/asm/vdso/vsyscall.h delete mode 100644 arch/arm64/include/asm/vdso_datapage.h delete mode 100644 arch/arm64/kernel/vdso/gettimeofday.S create mode 100644 arch/arm64/kernel/vdso/vgettimeofday.c create mode 100644 arch/arm64/kernel/vdso32/.gitignore create mode 100644 arch/arm64/kernel/vdso32/Makefile create mode 100644 arch/arm64/kernel/vdso32/note.c create mode 100644 arch/arm64/kernel/vdso32/sigreturn.S create mode 100644 arch/arm64/kernel/vdso32/vdso.S create mode 100644 arch/arm64/kernel/vdso32/vdso.lds.S create mode 100644 arch/arm64/kernel/vdso32/vgettimeofday.c create mode 100644 arch/mips/include/asm/vdso/gettimeofday.h rename arch/mips/{ => include/asm}/vdso/vdso.h (89%) create mode 100644 arch/mips/include/asm/vdso/vsyscall.h create mode 100644 arch/mips/vdso/vgettimeofday.c delete mode 100644 arch/x86/entry/vsyscall/vsyscall_gtod.c create mode 100644 arch/x86/include/asm/vdso/gettimeofday.h create mode 100644 arch/x86/include/asm/vdso/vsyscall.h create mode 100644 include/asm-generic/vdso/vsyscall.h create mode 100644 include/linux/hrtimer_defs.h create mode 100644 include/vdso/datapage.h create mode 100644 include/vdso/helpers.h create mode 100644 include/vdso/vsyscall.h create mode 100644 kernel/vdso/Makefile create mode 100644 kernel/vdso/vsyscall.c create mode 100644 lib/vdso/Kconfig create mode 100644 lib/vdso/Makefile create mode 100644 lib/vdso/gettimeofday.c create mode 100644 tools/testing/selftests/vDSO/vdso_config.h create mode 100644 tools/testing/selftests/vDSO/vdso_full_test.c -- 2.21.0

4 years, 4 months

18
107
0 0

[PATCH v4 0/6] lib/string: Add strscpy_pad() function

by Tobin C. Harding

Hi Shua, Here is the set with cleanup as suggested by Kees on v3. Configured, built, and tested all modules loaded by tools/testing/selftests/lib/*.sh >From previous cover letters ... While doing the testing for strscpy_pad() it was noticed that there is duplication in how test modules are being fed to kselftest and also in the test modules themselves. This set makes an attempt at adding a framework to kselftest for writing kernel test modules. It also adds a script for use in creating script test runners for kselftest. My macro-foo is not great, all criticism and suggestions very much appreciated. The design is based on test modules lib/test_printf.c, lib/test_bitmap.c, lib/test_xarray.c. Changes since last version: - Remove dependency on Bash (thanks Kees) - Use oneliner to implement kselftest test runners (thanks Kees) - Squash patch that adds kselftest script creator script with patch that uses it. - Fix typos (thanks Randy) - Add Kees' Acked-by tags to all patches thanks, Tobin. Tobin C. Harding (6): lib/test_printf: Add empty module_exit function kselftest: Add test runner creation script kselftest: Add test module framework header lib: Use new kselftest header lib/string: Add strscpy_pad() function lib: Add test module for strscpy_pad Documentation/dev-tools/kselftest.rst | 94 +++++++++++- include/linux/string.h | 4 + lib/Kconfig.debug | 3 + lib/Makefile | 1 + lib/string.c | 47 +++++- lib/test_bitmap.c | 20 +-- lib/test_printf.c | 17 +-- lib/test_strscpy.c | 150 +++++++++++++++++++ tools/testing/selftests/kselftest_module.h | 48 ++++++ tools/testing/selftests/kselftest_module.sh | 84 +++++++++++ tools/testing/selftests/lib/Makefile | 2 +- tools/testing/selftests/lib/bitmap.sh | 18 +-- tools/testing/selftests/lib/config | 1 + tools/testing/selftests/lib/prime_numbers.sh | 17 +-- tools/testing/selftests/lib/printf.sh | 19 +-- tools/testing/selftests/lib/strscpy.sh | 3 + 16 files changed, 440 insertions(+), 88 deletions(-) create mode 100644 lib/test_strscpy.c create mode 100644 tools/testing/selftests/kselftest_module.h create mode 100755 tools/testing/selftests/kselftest_module.sh create mode 100755 tools/testing/selftests/lib/strscpy.sh -- 2.21.0

4 years, 5 months

5
11
0 0

Plan for hybrid testing

by Brendan Higgins

Hey Knut and Shuah, Following up on our offline discussion on Wednesday night: We decided that it would make sense for Knut to try to implement Hybrid Testing (testing that crosses the kernel userspace boundary) that he introduced here[1] on top of the existing KUnit infrastructure. We discussed several possible things in the kernel that Knut could test with the new Hybrid Testing feature as an initial example. Those were (in reverse order of expected difficulty): 1. RDS (Reliable Datagram Sockets) - We decided that, although this was one of the more complicated subsystems to work with, it was probably the best candidate for Knut to start with because it was in desperate need of better testing, much of the testing would require crossing the kernel userspace boundary to be effective, and Knut has access to RDS (since he works at Oracle). 2. KMOD - Probably much simpler than RDS, and the maintainer, Luis Chamberlain (CC'ed) would like to see better testing here, but probably still not as good as RDS because it is in less dire need of testing, collaboration on this would be more difficult, and Luis is currently on an extended vacation. Luis and I had already been discussing testing KMOD here[2]. 3. IP over USB - Least desirable option, but still possible. More complicated than KMOD, and not as easy to collaborate on as RDS. I don't really think we discussed how this would work. I remember that I mentioned that it would be easier if I sent out a patch that centralizes where KUnit tests are dispatched from in the kernel; I will try to get an RFC for that out, probably sometime next week. That should provide a pretty straightforward place for Knut to move his work on top of. The next question is what the userspace component of this should look like. To me it seems like we should probably have the kselftest test runner manage when the test gets run, and collecting and reporting the result of the test, but I think Knut has thought more about this than I, and Shuah is the kselftest maintainer, so I am guessing this will probably mostly be a discussion between the two of you. So I think we have a couple of TODOs between us: Brendan: - Need to send out patch that provides a single place where all tests are dispatched from. Knut: - Start splitting out the hybrid test stuff from the rest of the RFC you sent previously. Knut and Shuah: - Start figuring out what the userspace component of this will look like. Cheers! [1] https://lore.kernel.org/linux-kselftest/524b4e062500c6a240d4d7c0e1d0a299680… [2] https://groups.google.com/forum/#!topic/kunit-dev/CdIytJtii00

4 years, 6 months

4
14
0 0

[PATCH v2] selftests: Add kselftest-all and kselftest-install targets

by Shuah Khan

Add kselftest-all target to build tests from the top level Makefile. This is to simplify kselftest use-cases for CI and distributions where build and test systems are different. Current kselftest target builds and runs tests on a development system which is a developer use-case. Add kselftest-install target to install tests from the top level Makefile. This is to simplify kselftest use-cases for CI and distributions where build and test systems are different. This change addresses requests from developers and testers to add support for installing kselftest from the main Makefile. In addition, make the install directory the same when install is run using "make kselftest-install" or by running kselftest_install.sh. Also fix the INSTALL_PATH variable conflict between main Makefile and selftests Makefile. Signed-off-by: Shuah Khan <skhan(a)linuxfoundation.org> --- Changes since v1: - Collpased two patches that added separate targets to build and install into one patch using pattern rule to invoke all, install, and clean targets from main Makefile. Makefile | 5 ++--- tools/testing/selftests/Makefile | 8 ++++++-- tools/testing/selftests/kselftest_install.sh | 4 ++-- 3 files changed, 10 insertions(+), 7 deletions(-) diff --git a/Makefile b/Makefile index d456746da347..ec296c60c1af 100644 --- a/Makefile +++ b/Makefile @@ -1237,9 +1237,8 @@ PHONY += kselftest kselftest: $(Q)$(MAKE) -C $(srctree)/tools/testing/selftests run_tests -PHONY += kselftest-clean -kselftest-clean: - $(Q)$(MAKE) -C $(srctree)/tools/testing/selftests clean +kselftest-%: FORCE + $(Q)$(MAKE) -C $(srctree)/tools/testing/selftests $* PHONY += kselftest-merge kselftest-merge: diff --git a/tools/testing/selftests/Makefile b/tools/testing/selftests/Makefile index c3feccb99ff5..bad18145ed1a 100644 --- a/tools/testing/selftests/Makefile +++ b/tools/testing/selftests/Makefile @@ -171,9 +171,12 @@ run_pstore_crash: # 1. output_dir=kernel_src # 2. a separate output directory is specified using O= KBUILD_OUTPUT # 3. a separate output directory is specified using KBUILD_OUTPUT +# Avoid conflict with INSTALL_PATH set by the main Makefile # -INSTALL_PATH ?= $(BUILD)/install -INSTALL_PATH := $(abspath $(INSTALL_PATH)) +KSFT_INSTALL_PATH ?= $(BUILD)/kselftest_install +KSFT_INSTALL_PATH := $(abspath $(KSFT_INSTALL_PATH)) +# Avoid changing the rest of the logic here and lib.mk. +INSTALL_PATH := $(KSFT_INSTALL_PATH) ALL_SCRIPT := $(INSTALL_PATH)/run_kselftest.sh install: all @@ -203,6 +206,7 @@ ifdef INSTALL_PATH echo "[ -w /dev/kmsg ] && echo \"kselftest: Running tests in $$TARGET\" >> /dev/kmsg" >> $(ALL_SCRIPT); \ echo "cd $$TARGET" >> $(ALL_SCRIPT); \ echo -n "run_many" >> $(ALL_SCRIPT); \ + echo -n "Emit Tests for $$TARGET\n"; \ $(MAKE) -s --no-print-directory OUTPUT=$$BUILD_TARGET -C $$TARGET emit_tests >> $(ALL_SCRIPT); \ echo "" >> $(ALL_SCRIPT); \ echo "cd \$$ROOT" >> $(ALL_SCRIPT); \ diff --git a/tools/testing/selftests/kselftest_install.sh b/tools/testing/selftests/kselftest_install.sh index ec304463883c..e2e1911d62d5 100755 --- a/tools/testing/selftests/kselftest_install.sh +++ b/tools/testing/selftests/kselftest_install.sh @@ -24,12 +24,12 @@ main() echo "$0: Installing in specified location - $install_loc ..." fi - install_dir=$install_loc/kselftest + install_dir=$install_loc/kselftest_install # Create install directory mkdir -p $install_dir # Build tests - INSTALL_PATH=$install_dir make install + KSFT_INSTALL_PATH=$install_dir make install } main "$@" -- 2.20.1

4 years, 6 months

3
4
0 0

[PATCH v2] riscv: add support for SECCOMP and SECCOMP_FILTER

by David Abdurachmanov

This patch was extensively tested on Fedora/RISCV (applied by default on top of 5.2-rc7 kernel for <2 months). The patch was also tested with 5.3-rc on QEMU and SiFive Unleashed board. libseccomp (userspace) was rebased: https://github.com/seccomp/libseccomp/pull/134 Fully passes libseccomp regression testing (simulation and live). There is one failing kernel selftest: global.user_notification_signal v1 -> v2: - return immediatly if secure_computing(NULL) returns -1 - fixed whitespace issues - add missing seccomp.h - remove patch #2 (solved now) - add riscv to seccomp kernel selftest Cc: keescook(a)chromium.org Cc: me(a)carlosedp.com Signed-off-by: David Abdurachmanov <david.abdurachmanov(a)sifive.com> --- arch/riscv/Kconfig | 14 ++++++++++ arch/riscv/include/asm/seccomp.h | 10 +++++++ arch/riscv/include/asm/thread_info.h | 5 +++- arch/riscv/kernel/entry.S | 27 +++++++++++++++++-- arch/riscv/kernel/ptrace.c | 10 +++++++ tools/testing/selftests/seccomp/seccomp_bpf.c | 8 +++++- 6 files changed, 70 insertions(+), 4 deletions(-) create mode 100644 arch/riscv/include/asm/seccomp.h diff --git a/arch/riscv/Kconfig b/arch/riscv/Kconfig index 59a4727ecd6c..441e63ff5adc 100644 --- a/arch/riscv/Kconfig +++ b/arch/riscv/Kconfig @@ -31,6 +31,7 @@ config RISCV select GENERIC_SMP_IDLE_THREAD select GENERIC_ATOMIC64 if !64BIT select HAVE_ARCH_AUDITSYSCALL + select HAVE_ARCH_SECCOMP_FILTER select HAVE_MEMBLOCK_NODE_MAP select HAVE_DMA_CONTIGUOUS select HAVE_FUTEX_CMPXCHG if FUTEX @@ -235,6 +236,19 @@ menu "Kernel features" source "kernel/Kconfig.hz" +config SECCOMP + bool "Enable seccomp to safely compute untrusted bytecode" + help + This kernel feature is useful for number crunching applications + that may need to compute untrusted bytecode during their + execution. By using pipes or other transports made available to + the process as file descriptors supporting the read/write + syscalls, it's possible to isolate those applications in + their own address space using seccomp. Once seccomp is + enabled via prctl(PR_SET_SECCOMP), it cannot be disabled + and the task is only allowed to execute a few safe syscalls + defined by each seccomp mode. + endmenu menu "Boot options" diff --git a/arch/riscv/include/asm/seccomp.h b/arch/riscv/include/asm/seccomp.h new file mode 100644 index 000000000000..bf7744ee3b3d --- /dev/null +++ b/arch/riscv/include/asm/seccomp.h @@ -0,0 +1,10 @@ +/* SPDX-License-Identifier: GPL-2.0 */ + +#ifndef _ASM_SECCOMP_H +#define _ASM_SECCOMP_H + +#include <asm/unistd.h> + +#include <asm-generic/seccomp.h> + +#endif /* _ASM_SECCOMP_H */ diff --git a/arch/riscv/include/asm/thread_info.h b/arch/riscv/include/asm/thread_info.h index 905372d7eeb8..a0b2a29a0da1 100644 --- a/arch/riscv/include/asm/thread_info.h +++ b/arch/riscv/include/asm/thread_info.h @@ -75,6 +75,7 @@ struct thread_info { #define TIF_MEMDIE 5 /* is terminating due to OOM killer */ #define TIF_SYSCALL_TRACEPOINT 6 /* syscall tracepoint instrumentation */ #define TIF_SYSCALL_AUDIT 7 /* syscall auditing */ +#define TIF_SECCOMP 8 /* syscall secure computing */ #define _TIF_SYSCALL_TRACE (1 << TIF_SYSCALL_TRACE) #define _TIF_NOTIFY_RESUME (1 << TIF_NOTIFY_RESUME) @@ -82,11 +83,13 @@ struct thread_info { #define _TIF_NEED_RESCHED (1 << TIF_NEED_RESCHED) #define _TIF_SYSCALL_TRACEPOINT (1 << TIF_SYSCALL_TRACEPOINT) #define _TIF_SYSCALL_AUDIT (1 << TIF_SYSCALL_AUDIT) +#define _TIF_SECCOMP (1 << TIF_SECCOMP) #define _TIF_WORK_MASK \ (_TIF_NOTIFY_RESUME | _TIF_SIGPENDING | _TIF_NEED_RESCHED) #define _TIF_SYSCALL_WORK \ - (_TIF_SYSCALL_TRACE | _TIF_SYSCALL_TRACEPOINT | _TIF_SYSCALL_AUDIT) + (_TIF_SYSCALL_TRACE | _TIF_SYSCALL_TRACEPOINT | _TIF_SYSCALL_AUDIT | \ + _TIF_SECCOMP ) #endif /* _ASM_RISCV_THREAD_INFO_H */ diff --git a/arch/riscv/kernel/entry.S b/arch/riscv/kernel/entry.S index bc7a56e1ca6f..0bbedfa3e47d 100644 --- a/arch/riscv/kernel/entry.S +++ b/arch/riscv/kernel/entry.S @@ -203,8 +203,25 @@ check_syscall_nr: /* Check to make sure we don't jump to a bogus syscall number. */ li t0, __NR_syscalls la s0, sys_ni_syscall - /* Syscall number held in a7 */ - bgeu a7, t0, 1f + /* + * The tracer can change syscall number to valid/invalid value. + * We use syscall_set_nr helper in syscall_trace_enter thus we + * cannot trust the current value in a7 and have to reload from + * the current task pt_regs. + */ + REG_L a7, PT_A7(sp) + /* + * Syscall number held in a7. + * If syscall number is above allowed value, redirect to ni_syscall. + */ + bge a7, t0, 1f + /* + * Check if syscall is rejected by tracer or seccomp, i.e., a7 == -1. + * If yes, we pretend it was executed. + */ + li t1, -1 + beq a7, t1, ret_from_syscall_rejected + /* Call syscall */ la s0, sys_call_table slli t0, a7, RISCV_LGPTR add s0, s0, t0 @@ -215,6 +232,12 @@ check_syscall_nr: ret_from_syscall: /* Set user a0 to kernel a0 */ REG_S a0, PT_A0(sp) + /* + * We didn't execute the actual syscall. + * Seccomp already set return value for the current task pt_regs. + * (If it was configured with SECCOMP_RET_ERRNO/TRACE) + */ +ret_from_syscall_rejected: /* Trace syscalls, but only if requested by the user. */ REG_L t0, TASK_TI_FLAGS(tp) andi t0, t0, _TIF_SYSCALL_WORK diff --git a/arch/riscv/kernel/ptrace.c b/arch/riscv/kernel/ptrace.c index 368751438366..63e47c9f85f0 100644 --- a/arch/riscv/kernel/ptrace.c +++ b/arch/riscv/kernel/ptrace.c @@ -154,6 +154,16 @@ void do_syscall_trace_enter(struct pt_regs *regs) if (tracehook_report_syscall_entry(regs)) syscall_set_nr(current, regs, -1); + /* + * Do the secure computing after ptrace; failures should be fast. + * If this fails we might have return value in a0 from seccomp + * (via SECCOMP_RET_ERRNO/TRACE). + */ + if (secure_computing(NULL) == -1) { + syscall_set_nr(current, regs, -1); + return; + } + #ifdef CONFIG_HAVE_SYSCALL_TRACEPOINTS if (test_thread_flag(TIF_SYSCALL_TRACEPOINT)) trace_sys_enter(regs, syscall_get_nr(current, regs)); diff --git a/tools/testing/selftests/seccomp/seccomp_bpf.c b/tools/testing/selftests/seccomp/seccomp_bpf.c index 6ef7f16c4cf5..492e0adad9d3 100644 --- a/tools/testing/selftests/seccomp/seccomp_bpf.c +++ b/tools/testing/selftests/seccomp/seccomp_bpf.c @@ -112,6 +112,8 @@ struct seccomp_data { # define __NR_seccomp 383 # elif defined(__aarch64__) # define __NR_seccomp 277 +# elif defined(__riscv) +# define __NR_seccomp 277 # elif defined(__hppa__) # define __NR_seccomp 338 # elif defined(__powerpc__) @@ -1582,6 +1584,10 @@ TEST_F(TRACE_poke, getpid_runs_normally) # define ARCH_REGS struct user_pt_regs # define SYSCALL_NUM regs[8] # define SYSCALL_RET regs[0] +#elif defined(__riscv) && __riscv_xlen == 64 +# define ARCH_REGS struct user_regs_struct +# define SYSCALL_NUM a7 +# define SYSCALL_RET a0 #elif defined(__hppa__) # define ARCH_REGS struct user_regs_struct # define SYSCALL_NUM gr[20] @@ -1671,7 +1677,7 @@ void change_syscall(struct __test_metadata *_metadata, EXPECT_EQ(0, ret) {} #if defined(__x86_64__) || defined(__i386__) || defined(__powerpc__) || \ - defined(__s390__) || defined(__hppa__) + defined(__s390__) || defined(__hppa__) || defined(__riscv) { regs.SYSCALL_NUM = syscall; } -- 2.21.0

4 years, 6 months

8
25
0 0

[PATCH v5 0/7] hugetlb_cgroup: Add hugetlb_cgroup reservation limits

by Mina Almasry

Patch series implements hugetlb_cgroup reservation usage and limits, which track hugetlb reservations rather than hugetlb memory faulted in. Details of the approach is 1/7. Changes in v5: - Moved the bulk of the description to the first patch in the series. - Clang formatted the entire series. - Split off 'hugetlb: remove duplicated code' and 'hugetlb: region_chg provides only cache entry' into their own patch series. - Added comments to HUGETLB_RES enum. - Fixed bug in 'hugetlb: disable region_add file_region coalescing' calculating the wrong number of regions_needed in some cases. - Changed sleeps in test to proper conditions. - Misc fixes in test based on shuah@ review. Changes in v4: - Split up 'hugetlb_cgroup: add accounting for shared mappings' into 4 patches for better isolation and context on the indvidual changes: - hugetlb_cgroup: add accounting for shared mappings - hugetlb: disable region_add file_region coalescing - hugetlb: remove duplicated code - hugetlb: region_chg provides only cache entry - Fixed resv->adds_in_progress accounting. - Retained behavior that region_add never fails, in earlier patchsets region_add could return failure. - Fixed libhugetlbfs failure. - Minor fix to the added tests that was preventing them from running on some environments. Changes in v3: - Addressed comments of Hillf Danton: - Added docs. - cgroup_files now uses enum. - Various readability improvements. - Addressed comments of Mike Kravetz. - region_* functions no longer coalesce file_region entries in the resv_map. - region_add() and region_chg() refactored to make them much easier to understand and remove duplicated code so this patch doesn't add too much complexity. - Refactored common functionality into helpers. Changes in v2: - Split the patch into a 5 patch series. - Fixed patch subject. Mina Almasry (7): hugetlb_cgroup: Add hugetlb_cgroup reservation counter hugetlb_cgroup: add interface for charge/uncharge hugetlb reservations hugetlb_cgroup: add reservation accounting for private mappings hugetlb: disable region_add file_region coalescing hugetlb_cgroup: add accounting for shared mappings hugetlb_cgroup: Add hugetlb_cgroup reservation tests hugetlb_cgroup: Add hugetlb_cgroup reservation docs .../admin-guide/cgroup-v1/hugetlb.rst | 85 +++- include/linux/hugetlb.h | 31 +- include/linux/hugetlb_cgroup.h | 33 +- mm/hugetlb.c | 423 +++++++++++----- mm/hugetlb_cgroup.c | 190 ++++++-- tools/testing/selftests/vm/.gitignore | 1 + tools/testing/selftests/vm/Makefile | 1 + .../selftests/vm/charge_reserved_hugetlb.sh | 461 ++++++++++++++++++ .../selftests/vm/write_hugetlb_memory.sh | 22 + .../testing/selftests/vm/write_to_hugetlbfs.c | 250 ++++++++++ 10 files changed, 1306 insertions(+), 191 deletions(-) create mode 100755 tools/testing/selftests/vm/charge_reserved_hugetlb.sh create mode 100644 tools/testing/selftests/vm/write_hugetlb_memory.sh create mode 100644 tools/testing/selftests/vm/write_to_hugetlbfs.c -- 2.23.0.351.gc4317032e6-goog

4 years, 6 months

4
24
0 0

[PATCH v2 0/3] seccomp: continue syscall from notifier

by Christian Brauner

Hey everyone, /* v2 */ This is the patchset coming out of the KSummit session Kees and I gave in Lisbon last week (cf. [3] which also contains slides with more details on related things such as deep argument inspection). The simple idea is to extend the seccomp notifier to allow for the continuation of a syscall. The rationale for this can be found in the commit message to [1]. For the curious there is more detail in [2]. This patchset would unblock supervising an extended set of syscalls such as mount() where a privileged process is supervising the syscalls of a lesser privileged process and emulates the syscall for the latter in userspace. For more comments on security see [1] and the comments in include/uapi/linux/seccomp.h added by this patchset. Kees, if you prefer a pr the series can be pulled from: git@gitolite.kernel.org:pub/scm/linux/kernel/git/brauner/linux tags/seccomp-notify-syscall-continue-v5.5 For anyone who wants to play with this it's sitting in: https://git.kernel.org/pub/scm/linux/kernel/git/brauner/linux.git/log/?h=se… /* v1 */ Link: https://lore.kernel.org/r/20190919095903.19370-1-christian.brauner@ubuntu.c… - Kees Cook <keescook(a)chromium.org>: - dropped patch because it is already present in linux-next [PATCH 2/4] seccomp: add two missing ptrace ifdefines Link: https://lore.kernel.org/r/20190918084833.9369-3-christian.brauner@ubuntu.com /* v0 */ Link: https://lore.kernel.org/r/20190918084833.9369-1-christian.brauner@ubuntu.com Thanks! Christian *** BLURB HERE *** Christian Brauner (3): seccomp: add SECCOMP_USER_NOTIF_FLAG_CONTINUE seccomp: avoid overflow in implicit constant conversion seccomp: test SECCOMP_USER_NOTIF_FLAG_CONTINUE include/uapi/linux/seccomp.h | 28 +++++ kernel/seccomp.c | 28 ++++- tools/testing/selftests/seccomp/seccomp_bpf.c | 110 +++++++++++++++++- 3 files changed, 159 insertions(+), 7 deletions(-) -- 2.23.0

4 years, 6 months

3
6
0 0

[PATCH v6 00/11] Add arm64/signal initial kselftest support

by Cristian Marussi

Hi this patchset aims to add the initial arch-specific arm64 support to kselftest starting with signals-related test-cases. This series is based on arm64/for-next/core [1]: commit 9ce1263033cd ("selftests, arm64: add a selftest for passing tagged pointers to kernel") A common internal test-case layout is proposed for signal tests and it is wired-up to the toplevel kselftest Makefile, so that it should be possible at the end to run it on an arm64 target in the usual way with KSFT. ~/linux# make TARGETS=arm64 kselftest New KSFT arm64 testcases live inside tools/testing/selftests/arm64 grouped by family inside subdirectories: arm64/signal is the first family proposed with this series. This series converts also to this subdirectory scheme the pre-existing (already queued on arm64/for-next/core) KSFT arm64 tags tests, moving them into arm64/tags. Thanks Cristian [1] git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-next/core Notes: ----- - further details in the included READMEs - more tests still to be written (current strategy is going through the related Kernel signal-handling code and write a test for each possible and sensible code-path) A few ideas for more TODO testcases: - fake_sigreturn_unmapped_sp: SP into unmapped addrs - fake_sigreturn_kernelspace_sp: SP into kernel addrs - fake_sigreturn_sve_bad_extra_context: SVE extra context badly formed - fake_sigreturn_misaligned_sp_4: misaligned SP by 4 (i.e., __alignof__(struct _aarch64_ctx)) - fake_sigreturn_misaligned_sp_8: misaligned SP by 8 (i.e., sizeof(struct _aarch64_ctx)) - fake_sigreturn_bad_size_non_aligned: a size that doesn't overflow __reserved[], but is not a multiple of 16 - fake_sigreturn_bad_size_tiny: a size that is less than 16 - fake_sigreturn_bad_size_overflow_tiny: a size that does overflow __reserved[], but by less than 16 bytes? - mangle_sve_invalid_extra_context: SVE extra_context invalid - SVE signal testcases and special handling will be part of an additional patch still to be released - KSFT arm64 tags test patch https://lore.kernel.org/linux-arm-kernel/c1e6aad230658bc175b42d92daeff2e300… is relocated into its own directory under tools/testing/selftests/arm64/tags Changes: -------- v5-->v6: - added arm64 toplevel Makefile SUBTARGETS env var to be able to selectively build only some arm64/ tests subdirectories - removed unneed toplevel Makefile exports and fixed Copyright - better checks for supported features and features names helpers - converted some run-time critical assert() to abort() to avoid issues when -NDEBUG is set - default_handler() signal handler refactored and split - using SIGTRAP for get_current_context() - use volatile where proper - refactor and relocate test_init() invocation - review usage of MRS SSBS instructions depending on HW_SSBS - cleanup fake_sigreturn trampoline - cleanup get_starting_header helper - avoiding timeout test failures wherever possible (fail immediately if possible) v4-->v5: - rebased on arm64/for-next-core merging 01/11 with KSFT tags tests: commit 9ce1263033cd ("selftests, arm64: add a selftest for passing tagged pointers to kernel") - moved .gitignore up on elevel - moved kernel header search mechanism into KSFT arm64 toplevel Makefile so that it can be used easily also by each arm64 KSFT subsystem inside subdirs of arm64 v3-->v4: - rebased on v5.3-rc6 - added test descriptions - fixed commit messages (imperative mood) - added missing includes and removed unneeded ones - added/used new get_starting_head() helper - fixed/simplified signal.S::fakke_sigreturn() - added set_regval() macro and .init initialization func - better synchonization in get_current_context() - macroization of mangle_pstate_invalid_mode_el - split mangle_pstate_invalid_mode_el h/t - removed standalone mode - simplified CPU features checks - fixed/refactored get_header() and validation routines - simplfied docs v2-->v3: - rebased on v5.3-rc2 - better test result characterization looking for SEGV_ACCERR in si_code on SIGSEGV - using KSFT Framework macros for retvalues - removed SAFE_WRITE()/dump_uc: buggy, un-needed and unused - reviewed generation process of test_arm64_signals.sh runner script - re-added a fixed fake_sigreturn_misaligned_sp testcase and a properly extended fake_sigreturn() helper - added tests' TODO notes v1-->v2: - rebased on 5.2-rc7 - various makefile's cleanups - mixed READMEs fixes - fixed test_arm64_signals.sh runner script - cleaned up assembly code in signal.S - improved get_current_context() logic - fixed SAFE_WRITE() - common support code split into more chunks, each one introduced when needed by some new testcases - fixed some headers validation routines in testcases.c - removed some still broken/immature tests: + fake_sigreturn_misaligned + fake_sigreturn_overflow_reserved + mangle_pc_invalid + mangle_sp_misaligned - fixed some other testcases: + mangle_pstate_ssbs_regs: better checks of SSBS bit when feature unsupported + mangle_pstate_invalid_compat_toggle: name fix + mangle_pstate_invalid_mode_el[1-3]: precautionary zeroing PSTATE.MODE + fake_sigreturn_bad_magic, fake_sigreturn_bad_size, fake_sigreturn_bad_size_for_magic0: - accounting for available space...dropping extra when needed - keeping alignent - new testcases on FPSMID context: + fake_sigreturn_missing_fpsimd + fake_sigreturn_duplicated_fpsimd Cristian Marussi (11): kselftest: arm64: extend toplevel skeleton Makefile kselftest: arm64: mangle_pstate_invalid_compat_toggle and common utils kselftest: arm64: mangle_pstate_invalid_daif_bits kselftest: arm64: mangle_pstate_invalid_mode_el[123][ht] kselftest: arm64: mangle_pstate_ssbs_regs kselftest: arm64: fake_sigreturn_bad_magic kselftest: arm64: fake_sigreturn_bad_size_for_magic0 kselftest: arm64: fake_sigreturn_missing_fpsimd kselftest: arm64: fake_sigreturn_duplicated_fpsimd kselftest: arm64: fake_sigreturn_bad_size kselftest: arm64: fake_sigreturn_misaligned_sp tools/testing/selftests/Makefile | 1 + tools/testing/selftests/arm64/Makefile | 63 +++- tools/testing/selftests/arm64/README | 25 ++ .../testing/selftests/arm64/signal/.gitignore | 3 + tools/testing/selftests/arm64/signal/Makefile | 32 ++ tools/testing/selftests/arm64/signal/README | 59 ++++ .../testing/selftests/arm64/signal/signals.S | 64 ++++ .../selftests/arm64/signal/test_signals.c | 29 ++ .../selftests/arm64/signal/test_signals.h | 125 +++++++ .../arm64/signal/test_signals_utils.c | 331 ++++++++++++++++++ .../arm64/signal/test_signals_utils.h | 120 +++++++ .../testcases/fake_sigreturn_bad_magic.c | 52 +++ .../testcases/fake_sigreturn_bad_size.c | 77 ++++ .../fake_sigreturn_bad_size_for_magic0.c | 46 +++ .../fake_sigreturn_duplicated_fpsimd.c | 50 +++ .../testcases/fake_sigreturn_misaligned_sp.c | 37 ++ .../testcases/fake_sigreturn_missing_fpsimd.c | 50 +++ .../mangle_pstate_invalid_compat_toggle.c | 31 ++ .../mangle_pstate_invalid_daif_bits.c | 35 ++ .../mangle_pstate_invalid_mode_el1h.c | 15 + .../mangle_pstate_invalid_mode_el1t.c | 15 + .../mangle_pstate_invalid_mode_el2h.c | 15 + .../mangle_pstate_invalid_mode_el2t.c | 15 + .../mangle_pstate_invalid_mode_el3h.c | 15 + .../mangle_pstate_invalid_mode_el3t.c | 15 + .../mangle_pstate_invalid_mode_template.h | 28 ++ .../testcases/mangle_pstate_ssbs_regs.c | 88 +++++ .../arm64/signal/testcases/testcases.c | 196 +++++++++++ .../arm64/signal/testcases/testcases.h | 104 ++++++ tools/testing/selftests/arm64/tags/Makefile | 6 + .../arm64/{ => tags}/run_tags_test.sh | 0 .../selftests/arm64/{ => tags}/tags_test.c | 0 32 files changed, 1738 insertions(+), 4 deletions(-) create mode 100644 tools/testing/selftests/arm64/README create mode 100644 tools/testing/selftests/arm64/signal/.gitignore create mode 100644 tools/testing/selftests/arm64/signal/Makefile create mode 100644 tools/testing/selftests/arm64/signal/README create mode 100644 tools/testing/selftests/arm64/signal/signals.S create mode 100644 tools/testing/selftests/arm64/signal/test_signals.c create mode 100644 tools/testing/selftests/arm64/signal/test_signals.h create mode 100644 tools/testing/selftests/arm64/signal/test_signals_utils.c create mode 100644 tools/testing/selftests/arm64/signal/test_signals_utils.h create mode 100644 tools/testing/selftests/arm64/signal/testcases/fake_sigreturn_bad_magic.c create mode 100644 tools/testing/selftests/arm64/signal/testcases/fake_sigreturn_bad_size.c create mode 100644 tools/testing/selftests/arm64/signal/testcases/fake_sigreturn_bad_size_for_magic0.c create mode 100644 tools/testing/selftests/arm64/signal/testcases/fake_sigreturn_duplicated_fpsimd.c create mode 100644 tools/testing/selftests/arm64/signal/testcases/fake_sigreturn_misaligned_sp.c create mode 100644 tools/testing/selftests/arm64/signal/testcases/fake_sigreturn_missing_fpsimd.c create mode 100644 tools/testing/selftests/arm64/signal/testcases/mangle_pstate_invalid_compat_toggle.c create mode 100644 tools/testing/selftests/arm64/signal/testcases/mangle_pstate_invalid_daif_bits.c create mode 100644 tools/testing/selftests/arm64/signal/testcases/mangle_pstate_invalid_mode_el1h.c create mode 100644 tools/testing/selftests/arm64/signal/testcases/mangle_pstate_invalid_mode_el1t.c create mode 100644 tools/testing/selftests/arm64/signal/testcases/mangle_pstate_invalid_mode_el2h.c create mode 100644 tools/testing/selftests/arm64/signal/testcases/mangle_pstate_invalid_mode_el2t.c create mode 100644 tools/testing/selftests/arm64/signal/testcases/mangle_pstate_invalid_mode_el3h.c create mode 100644 tools/testing/selftests/arm64/signal/testcases/mangle_pstate_invalid_mode_el3t.c create mode 100644 tools/testing/selftests/arm64/signal/testcases/mangle_pstate_invalid_mode_template.h create mode 100644 tools/testing/selftests/arm64/signal/testcases/mangle_pstate_ssbs_regs.c create mode 100644 tools/testing/selftests/arm64/signal/testcases/testcases.c create mode 100644 tools/testing/selftests/arm64/signal/testcases/testcases.h create mode 100644 tools/testing/selftests/arm64/tags/Makefile rename tools/testing/selftests/arm64/{ => tags}/run_tags_test.sh (100%) rename tools/testing/selftests/arm64/{ => tags}/tags_test.c (100%) -- 2.17.1

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Linux-kselftest-mirror September 2019