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

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Date:   Wed,  4 May 2022 08:23:49 +0200
From:   Thomas Richter <tmricht@...ux.ibm.com>
To:     linux-kernel@...r.kernel.org, linux-s390@...r.kernel.org
Cc:     Thomas Richter <tmricht@...ux.ibm.com>
Subject: [PATCH 0/2] s390/pai: Add support for Processor Activity Instrumentation

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