[PATCH v9 44/44] kselftest/arm64: Check GCR_EL1 after context switch

[Catalin Marinas]

On Tue, Nov 10, 2020 at 11:10:41PM +0100, Andrey Konovalov wrote:
> From: Vincenzo Frascino <vincenzo.frascino at arm.com>
> 
> 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: Vincenzo Frascino <vincenzo.frascino at arm.com>
> Signed-off-by: Andrey Konovalov <andreyknvl at google.com>

Acked-by: Catalin Marinas <catalin.marinas at arm.com>