Le 14/12/2023 à 06:55, Nicholas Miehlbradt a écrit : > This series provides the minimal support for Kernal Memory Sanitizer on > powerpc pseries le guests. Kernal Memory Sanitizer is a tool which detects > uses of uninitialized memory. Currently KMSAN is clang only. > > The clang support for powerpc has not yet been merged, the pull request can > be found here [1]. As clang doesn't support it yet, it is probably prematurate to merge that in the kernel. I have open https://github.com/linuxppc/issues/issues/475 to follow through In the meantime I flag this series as "change requested" for a revisit it when time comes Christophe > > In addition to this series, there are a number of changes required in > generic kmsan code. These changes are already on mailing lists as part of > the series implementing KMSAN for s390 [2]. This series is intended to be > rebased on top of the s390 series. > > In addition, I found a bug in the rtc driver used on powerpc. I have sent > a fix to this in a seperate series [3]. > > With this series and the two series mentioned above, I can successfully > boot pseries le defconfig without KMSAN warnings. I have not tested other > powerpc platforms. > > [1] https://github.com/llvm/llvm-project/pull/73611 > [2] https://lore.kernel.org/linux-mm/20231121220155.1217090-1-iii@xxxxxxxxxxxxx/ > [3] https://lore.kernel.org/linux-rtc/20231129073647.2624497-1-nicholas@xxxxxxxxxxxxx/ > > Nicholas Miehlbradt (13): > kmsan: Export kmsan_handle_dma > hvc: Fix use of uninitialized array in udbg_hvc_putc > powerpc: Disable KMSAN santitization for prom_init, vdso and purgatory > powerpc: Disable CONFIG_DCACHE_WORD_ACCESS when KMSAN is enabled > powerpc: Unpoison buffers populated by hcalls > powerpc/pseries/nvram: Unpoison buffer populated by rtas_call > powerpc/kprobes: Unpoison instruction in kprobe struct > powerpc: Unpoison pt_regs > powerpc: Disable KMSAN checks on functions which walk the stack > powerpc: Define KMSAN metadata address ranges for vmalloc and ioremap > powerpc: Implement architecture specific KMSAN interface > powerpc/string: Add KMSAN support > powerpc: Enable KMSAN on powerpc > > arch/powerpc/Kconfig | 3 +- > arch/powerpc/include/asm/book3s/64/pgtable.h | 42 +++++++++++++++ > arch/powerpc/include/asm/interrupt.h | 2 + > arch/powerpc/include/asm/kmsan.h | 51 +++++++++++++++++++ > arch/powerpc/include/asm/string.h | 18 ++++++- > arch/powerpc/kernel/Makefile | 2 + > arch/powerpc/kernel/irq_64.c | 2 + > arch/powerpc/kernel/kprobes.c | 2 + > arch/powerpc/kernel/module.c | 2 +- > arch/powerpc/kernel/process.c | 6 +-- > arch/powerpc/kernel/stacktrace.c | 10 ++-- > arch/powerpc/kernel/vdso/Makefile | 1 + > arch/powerpc/lib/Makefile | 2 + > arch/powerpc/lib/mem_64.S | 5 +- > arch/powerpc/lib/memcpy_64.S | 2 + > arch/powerpc/perf/callchain.c | 2 +- > arch/powerpc/platforms/pseries/hvconsole.c | 2 + > arch/powerpc/platforms/pseries/nvram.c | 4 ++ > arch/powerpc/purgatory/Makefile | 1 + > arch/powerpc/sysdev/xive/spapr.c | 3 ++ > drivers/tty/hvc/hvc_vio.c | 2 +- > mm/kmsan/hooks.c | 1 + > .../selftests/powerpc/copyloops/asm/kmsan.h | 0 > .../powerpc/copyloops/linux/export.h | 1 + > 24 files changed, 152 insertions(+), 14 deletions(-) > create mode 100644 arch/powerpc/include/asm/kmsan.h > create mode 100644 tools/testing/selftests/powerpc/copyloops/asm/kmsan.h >
