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  • Vincenzo Frascino's avatar
    kselftest/arm64: Check GCR_EL1 after context switch · adce6dd2
    Vincenzo Frascino authored
    This test is specific to MTE and verifies that the GCR_EL1 register
    is context switched correctly.
    It spawn 1024 processes and each process spawns 5 threads. Each thread
    writes a random setting of GCR_EL1 through the prctl() system call and
    reads it back verifying that it is the same. If the values are not the
    same it reports a failure.
    Note: The test has been extended to verify that even SYNC and ASYNC mode
    setting is preserved correctly over context switching.
    Signed-off-by: default avatarVincenzo Frascino <>
    Signed-off-by: default avatarAndrey Konovalov <>
    Change-Id: Ia917684a2b8e5f29e705ca5cbf360b010df6f61e