From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail.ozlabs.org (gandalf.ozlabs.org [150.107.74.76]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id C56A9158A11 for ; Tue, 9 Jul 2024 12:27:23 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=150.107.74.76 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1720528046; cv=none; b=evSvP8FyV4JPU7IR9T5AB+kREuhqpxVBpy8koEBipWtUDLWXYWtgjtLVrvKsewkBsgZlITbdGb8HV5oqkb5VnUFhEddBR3qM7VOGYfYID5spWf5yAfgKHR7Gwxejmo82EY+L1zYLCj0cRZqWCUw4rbhUph7ja9dK6LXC9ziOm1c= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1720528046; c=relaxed/simple; bh=tx6Q+H8v+nZJ8xSZhekIrhdfMQ/EMW1bDL63Q7jetTY=; h=From:To:Cc:Subject:In-Reply-To:References:Date:Message-ID: MIME-Version:Content-Type; b=UILlSYCF2uU4dACeX7YwHNgV25qc1i8dPU4qx4LVuPP9U6rg5Nki1a1jn7uXL643fihlvjOLfuSgMerBss3de/LLyrrns+KjMI2L8cjK6f0fJN1cYSQjnOsjNho6GjM7+vZcccm+p7umqs6fdrFfjKBh3W0ksgS823dhWm+1N4E= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=ellerman.id.au; spf=pass smtp.mailfrom=ellerman.id.au; dkim=pass (2048-bit key) header.d=ellerman.id.au header.i=@ellerman.id.au header.b=GdZNc7Lh; arc=none smtp.client-ip=150.107.74.76 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=ellerman.id.au Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=ellerman.id.au Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=ellerman.id.au header.i=@ellerman.id.au header.b="GdZNc7Lh" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ellerman.id.au; s=201909; t=1720528041; bh=yG8VM+AC2gBC/m6ETfftbKwWUlampOF7XBFC+g1UhG0=; h=From:To:Cc:Subject:In-Reply-To:References:Date:From; b=GdZNc7Lh+a4yCaeVMc5h8IA53+HPYYrHTJEOWxKXmwjYm82Zo/Kb/7Mtv7K8RN127 Q/KYLIPcvEr/8HwvSYN4/5VFuUzfsr14FNRAX34BGa/FUMgmCvunxkDIrEqu8d+Ciy 2I5koaK8wFuAIixCCFrQOgZA7+wdq3PmXzqovQpn7Q744mjgWi79PI1vi16GU+fAec cRRSIZLcIl6Ongs/7VKhAH4NYLFYWc7VGSBeENnyu9/c1fh9b21ed0a7SanPaXpdi6 07w7zCmi2C/9YBZtkLMMyb+/1qvUX1vXLUawqY/s6LAD83rLL/5a84BZRZ+qfOCudq 9OLqF6cHOJqYg== Received: from authenticated.ozlabs.org (localhost [127.0.0.1]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256) (No client certificate requested) by mail.ozlabs.org (Postfix) with ESMTPSA id 4WJKxj6M4bz4wc3; Tue, 9 Jul 2024 22:27:21 +1000 (AEST) From: Michael Ellerman To: Greg Kroah-Hartman , stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Benjamin Gray , Sasha Levin Subject: Re: [PATCH 6.9 057/197] powerpc/dexcr: Track the DEXCR per-process In-Reply-To: <20240709110711.171129088@linuxfoundation.org> References: <20240709110708.903245467@linuxfoundation.org> <20240709110711.171129088@linuxfoundation.org> Date: Tue, 09 Jul 2024 22:27:20 +1000 Message-ID: <87v81e6993.fsf@mail.lhotse> Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain Greg Kroah-Hartman writes: > 6.9-stable review patch. If anyone has any objections, please let me know. > > ------------------ > > From: Benjamin Gray > > [ Upstream commit 75171f06c4507c3b6b5a69d793879fb20d108bb1 ] > > Add capability to make the DEXCR act as a per-process SPR. > > We do not yet have an interface for changing the values per task. We > also expect the kernel to use a single DEXCR value across all tasks > while in privileged state, so there is no need to synchronize after > changing it (the userspace aspects will synchronize upon returning to > userspace). > > Signed-off-by: Benjamin Gray > Signed-off-by: Michael Ellerman > Link: https://msgid.link/20240417112325.728010-3-bgray@linux.ibm.com > Stable-dep-of: bbd99922d0f4 ("powerpc/dexcr: Reset DEXCR value across exec") This is listed as a dep, but I don't see that commit (bbd99922d0f4) queued up? This series included user-visible changes including new prctls, it shouldn't be backported piecemeal. I think this series shouldn't be backported unless someone explicitly wants it. cheers