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charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org On Tue, May 28, 2024 at 08:18:29AM +0100, Shameer Kolothum wrote: > .read_and_clear_dirty() IOMMU domain op takes care of reading the dirty > bits (i.e. PTE has DBM set and AP[2] clear) and marshalling into a > bitmap of a given page size. > > While reading the dirty bits we also set the PTE AP[2] bit to mark it > as writeable-clean depending on read_and_clear_dirty() flags. > > PTE states with respect to DBM bit: > > DBM bit AP[2]("RDONLY" bit) > 1. writable_clean 1 1 > 2. writable_dirty 1 0 > 3. read-only 0 1 > > Reviewed-by: Ryan Roberts > Signed-off-by: Shameer Kolothum > --- > drivers/iommu/io-pgtable-arm.c | 114 ++++++++++++++++++++++++++++++++- > 1 file changed, 112 insertions(+), 2 deletions(-) Reviewed-by: Jason Gunthorpe Jason _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel