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Date:   Fri, 16 Sep 2022 13:01:31 +0100
From:   Catalin Marinas <catalin.marinas@arm.com>
To:     Mark Brown <broonie@kernel.org>
Cc:     Will Deacon <will@kernel.org>,
        Shuah Khan <skhan@linuxfoundation.org>,
        Shuah Khan <shuah@kernel.org>,
        Alan Hayward <alan.hayward@arm.com>,
        Luis Machado <luis.machado@arm.com>,
        linux-arm-kernel@lists.infradead.org,
        linux-kselftest@vger.kernel.org
Subject: Re: [PATCH v4 3/4] arm64/ptrace: Support access to TPIDR2_EL0
Message-ID: <YyRlm/koy30sze9Z@arm.com>
References: <20220829154921.837871-1-broonie@kernel.org>
 <20220829154921.837871-4-broonie@kernel.org>
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On Mon, Aug 29, 2022 at 04:49:20PM +0100, Mark Brown wrote:
> @@ -1392,7 +1407,7 @@ static const struct user_regset aarch64_regsets[] = {
>  	},
>  	[REGSET_TLS] = {
>  		.core_note_type = NT_ARM_TLS,
> -		.n = 1,
> +		.n = 2,
>  		.size = sizeof(void *),
>  		.align = sizeof(void *),
>  		.regset_get = tls_get,

Does this change confuse user-space? I presume an updated gdb would
check the iov.len to figure out whether a new register is available but
would existing debuggers complain of the new size of this regset?

-- 
Catalin