This patch series adds support for Processor Activity Instrumentation (PAI) for cryptography instructions. A new Performance Measurement Unit (PMU) is introduced. It reads memory mapped counter values incremented when a CPU executes certain instructions. To differentiate between user space and kernel space counter increments, the memory mapping is changed on system call entry/exit and IRQ entry/exit. Patch 1 prepares that transition, patch 2 introduces the new PMU and kernel vs user space memory mappings. Sven Schnelle (1): entry: Rename arch_check_user_regs() to arch_enter_from_user_mode() Thomas Richter (1): s390/pai: Add support for cryptography counters arch/s390/include/asm/ctl_reg.h | 4 +- arch/s390/include/asm/entry-common.h | 14 +- arch/s390/include/asm/lowcore.h | 5 +- arch/s390/include/asm/nmi.h | 2 +- arch/s390/include/asm/pai.h | 74 +++ arch/s390/kernel/Makefile | 1 + arch/s390/kernel/entry.S | 1 + arch/s390/kernel/nmi.c | 6 +- arch/s390/kernel/perf_pai_crypto.c | 688 +++++++++++++++++++++++++++ arch/x86/include/asm/entry-common.h | 4 +- include/linux/entry-common.h | 8 +- kernel/entry/common.c | 2 +- 12 files changed, 793 insertions(+), 16 deletions(-) create mode 100644 arch/s390/include/asm/pai.h create mode 100644 arch/s390/kernel/perf_pai_crypto.c -- 2.32.0
