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

From: Catalin Marinas <[email-masked]>
Date: Thu, 12 Nov 2020 09:46:54 +0000

On Tue, Nov 10, 2020 at 11:10:41PM +0100, Andrey Konovalov wrote:
> From: Vincenzo Frascino <[email-masked]>
> 
> 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 <[email-masked]>
> Signed-off-by: Andrey Konovalov <[email-masked]>

Acked-by: Catalin Marinas <[email-masked]>

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