On Mon, May 17, 2021 at 03:17:53PM +0800, Lu Baolu wrote: > 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@xxxxxxxxx> > > > Signed-off-by: Lu Baolu <baolu.lu@xxxxxxxxxxxxxxx> > > > Link: https://lore.kernel.org/r/20210115004202.953965-1-baolu.lu@xxxxxxxxxxxxxxx > > > Signed-off-by: Joerg Roedel <jroedel@xxxxxxx> > > > Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx> > > > --- > > > 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@xxxxxxxxxxxxxxxxxxx/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. But the above commit is already in 5.10.y. And what about 5.11 and 5.12, were those backports incorrect? confused, greg k-h
