[PATCH 0/2] s390/pai: Add support for Processor Activity Instrumentation

Thomas Richter
2022-05-04T06:24:17Z

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

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2.32.0