From: Lu Baolu <baolu.lu@linux.intel.com>
To: Greg KH <gregkh@linuxfoundation.org>
Cc: baolu.lu@linux.intel.com, sashal@kernel.org, ashok.raj@intel.com,
jroedel@suse.de, linux-kernel@vger.kernel.org,
stable@vger.kernel.org
Subject: Re: [REWORKED PATCH 1/1] iommu/vt-d: Preset Access/Dirty bits for IOVA over FL
Date: Mon, 17 May 2021 15:17:53 +0800 [thread overview]
Message-ID: <726aede1-3d9f-6666-b31d-9db8e4301a0c@linux.intel.com> (raw)
In-Reply-To: <YKIWS0lFKTcZ9094@kroah.com>
Hi Greg,
On 5/17/21 3:07 PM, Greg KH wrote:
> On Mon, May 17, 2021 at 11:49:13AM +0800, Lu Baolu wrote:
>> [ Upstream commit a8ce9ebbecdfda3322bbcece6b3b25888217f8e3 ]
>>
>> The Access/Dirty bits in the first level page table entry will be set
>> whenever a page table entry was used for address translation or write
>> permission was successfully translated. This is always true when using
>> the first-level page table for kernel IOVA. Instead of wasting hardware
>> cycles to update the certain bits, it's better to set them up at the
>> beginning.
>>
>> Suggested-by: Ashok Raj <ashok.raj@intel.com>
>> Signed-off-by: Lu Baolu <baolu.lu@linux.intel.com>
>> Link: https://lore.kernel.org/r/20210115004202.953965-1-baolu.lu@linux.intel.com
>> Signed-off-by: Joerg Roedel <jroedel@suse.de>
>> Signed-off-by: Sasha Levin <sashal@kernel.org>
>> ---
>> drivers/iommu/intel/iommu.c | 14 ++++++++++++--
>> include/linux/intel-iommu.h | 2 ++
>> 2 files changed, 14 insertions(+), 2 deletions(-)
>>
>> [Note:
>> - This is a reworked patch of
>> https://lore.kernel.org/stable/20210512144819.664462530@linuxfoundation.org/T/#m65267f0a0091c2fcbde097cea91089775908faad.
>> - It aims to fix a reported issue of
>> https://bugzilla.kernel.org/show_bug.cgi?id=213077.
>> - Please help to review and test.]
>
> What stable tree(s) is this supposed to be for?
It's for 5.10.37.
>
> thanks,
>
> greg k-h
>
Best regards,
baolu
next prev parent reply other threads:[~2021-05-17 7:18 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-05-17 3:49 [REWORKED PATCH 1/1] iommu/vt-d: Preset Access/Dirty bits for IOVA over FL Lu Baolu
2021-05-17 7:07 ` Greg KH
2021-05-17 7:17 ` Lu Baolu [this message]
2021-05-17 7:27 ` Greg KH
2021-05-17 7:51 ` Lu Baolu
2021-05-17 10:01 ` Greg KH
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