tree 5add1e5401d88abbbdd1e364419f367d0c1746bd
parent cd3e93cb9f18b4e83553cc16756d0e31c453c4ab
author Punit Agrawal <punit.agrawal@arm.com> 1496942728 +0100
committer Bharath <bharath@teamb58.org> 1710761160 +0530

arm64: mm: Update perf accounting to handle poison faults

Re-organise the perf accounting for fault handling in preparation for
enabling handling of hardware poison faults in subsequent commits. The
change updates perf accounting to be inline with the behaviour on
x86.

With this update, the perf fault accounting -

  * Always report PERF_COUNT_SW_PAGE_FAULTS

  * Doesn't report anything else for VM_FAULT_ERROR (which includes
    hwpoison faults)

  * Reports PERF_COUNT_SW_PAGE_FAULTS_MAJ if it's a major
    fault (indicated by VM_FAULT_MAJOR)

  * Otherwise, reports PERF_COUNT_SW_PAGE_FAULTS_MIN

Test: run vts -m drop_caches_test
Change-Id: I4be2180ef9d046fb4f8edcbcc9dc30ce0c6622d2
Signed-off-by: Punit Agrawal <punit.agrawal@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
(cherry picked from commit 0e3a9026396cd7d0eb5777ba923a8f30a3d9db19)