linux-kernel - [PATCH 0/7] powerpc/watchpoint: 2nd DAWR kvm enablement + selftests

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Date:   Thu, 23 Jul 2020 15:50:51 +0530
From:   Ravi Bangoria <ravi.bangoria@...ux.ibm.com>
To:     mpe@...erman.id.au, paulus@...ba.org
Cc:     ravi.bangoria@...ux.ibm.com, mikey@...ling.org, npiggin@...il.com,
        pbonzini@...hat.com, christophe.leroy@....fr, jniethe5@...il.com,
        pedromfc@...ibm.com, rogealve@...ibm.com, kvm@...r.kernel.org,
        kvm-ppc@...r.kernel.org, linux-kernel@...r.kernel.org,
        linuxppc-dev@...ts.ozlabs.org, linux-kselftest@...r.kernel.org
Subject: [PATCH 0/7] powerpc/watchpoint: 2nd DAWR kvm enablement + selftests

Patch #1, #2 and #3 enables p10 2nd DAWR feature for Book3S kvm guest. DAWR
is a hypervisor resource and thus H_SET_MODE hcall is used to set/unset it.
A new case H_SET_MODE_RESOURCE_SET_DAWR1 is introduced in H_SET_MODE hcall
for setting/unsetting 2nd DAWR. Also, new capability KVM_CAP_PPC_DAWR1 has
been added to query 2nd DAWR support via kvm ioctl.

This feature also needs to be enabled in Qemu to really use it. I'll reply
link to qemu patches once I post them in qemu-devel mailing list.

Patch #4, #5, #6 and #7 adds selftests to test 2nd DAWR.

Dependency:
  1: p10 kvm base enablement
     https://lore.kernel.org/linuxppc-dev/20200602055325.6102-1-alistair@popple.id.au

  2: 2nd DAWR powervm/baremetal enablement
     https://lore.kernel.org/linuxppc-dev/20200723090813.303838-1-ravi.bangoria@linux.ibm.com

  3: ptrace PPC_DEBUG_FEATURE_DATA_BP_DAWR_ARCH_31 flag
     https://lore.kernel.org/linuxppc-dev/20200723093330.306341-1-ravi.bangoria@linux.ibm.com

Patches in this series applies fine on top of powerpc/next (9a77c4a0a125)
plus above dependency patches.

Ravi Bangoria (7):
  powerpc/watchpoint/kvm: Rename current DAWR macros and variables
  powerpc/watchpoint/kvm: Add infrastructure to support 2nd DAWR
  powerpc/watchpoint/kvm: Introduce new capability for 2nd DAWR
  powerpc/selftests/ptrace-hwbreak: Add testcases for 2nd DAWR
  powerpc/selftests/perf-hwbreak: Coalesce event creation code
  powerpc/selftests/perf-hwbreak: Add testcases for 2nd DAWR
  powerpc/selftests: Add selftest to test concurrent perf/ptrace events

 Documentation/virt/kvm/api.rst                |   6 +-
 arch/powerpc/include/asm/hvcall.h             |   2 +
 arch/powerpc/include/asm/kvm_host.h           |   6 +-
 arch/powerpc/include/uapi/asm/kvm.h           |   8 +-
 arch/powerpc/kernel/asm-offsets.c             |   6 +-
 arch/powerpc/kvm/book3s_hv.c                  |  73 +-
 arch/powerpc/kvm/book3s_hv_nested.c           |  15 +-
 arch/powerpc/kvm/book3s_hv_rmhandlers.S       |  43 +-
 arch/powerpc/kvm/powerpc.c                    |   3 +
 include/uapi/linux/kvm.h                      |   1 +
 tools/arch/powerpc/include/uapi/asm/kvm.h     |   8 +-
 .../selftests/powerpc/ptrace/.gitignore       |   1 +
 .../testing/selftests/powerpc/ptrace/Makefile |   2 +-
 .../selftests/powerpc/ptrace/perf-hwbreak.c   | 646 +++++++++++++++--
 .../selftests/powerpc/ptrace/ptrace-hwbreak.c |  79 +++
 .../powerpc/ptrace/ptrace-perf-hwbreak.c      | 659 ++++++++++++++++++
 16 files changed, 1476 insertions(+), 82 deletions(-)
 create mode 100644 tools/testing/selftests/powerpc/ptrace/ptrace-perf-hwbreak.c

-- 
2.26.2