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]. 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 -- 2.40.1
