From: Thomas Richter <tmricht@linux.ibm.com>
To: linux-kernel@vger.kernel.org, linux-s390@vger.kernel.org
Cc: Thomas Richter <tmricht@linux.ibm.com>
Subject: [PATCH 0/2] s390/pai: Add support for Processor Activity Instrumentation
Date: Wed, 4 May 2022 08:23:49 +0200 [thread overview]
Message-ID: <20220504062351.2954280-1-tmricht@linux.ibm.com> (raw)
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
next reply other threads:[~2022-05-04 6:24 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-05-04 6:23 Thomas Richter [this message]
2022-05-04 6:23 ` [PATCH 1/2] entry: Rename arch_check_user_regs() to arch_enter_from_user_mode() Thomas Richter
2022-05-06 19:31 ` Peter Zijlstra
2022-05-09 6:20 ` Sven Schnelle
2022-05-09 7:08 ` Peter Zijlstra
2022-05-09 9:55 ` Heiko Carstens
2022-05-06 19:38 ` Thomas Gleixner
2022-05-06 19:49 ` Heiko Carstens
2022-05-06 21:55 ` Thomas Gleixner
2022-05-04 6:23 ` [PATCH 2/2] s390/pai: Add support for cryptography counters Thomas Richter
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