| Message ID | 20220512144557.18025-1-yf.wang@mediatek.com (mailing list archive) |
|---|---|
| Headers | show |
| Series | MediaTek TTBR up to 35bit support | expand |
On Thu, 2022-05-12 at 22:45 +0800, yf.wang@mediatek.com wrote: > This patchset adds MediaTek TTBR up to 35bit support. > > > Changes in v3: > - Add version changes description, there is No new code change in V3. > > Changes in v2: > - Update patch and commit message > - Add Level 1 pgtable PA up to 35bit. Why add this for lvl1 pgtable? Did you get real problem? lvl2 pgtable is allocated/freed dynamically, it may be allocated failed in ZONE_DMA32 when burning test. But the lvl1 pgtable only is allocated once after bootup. I think this is no need for lvl1 pgtable. > - This is new feature, remove stable@vger.kernel.org > - Update commit message. > > Ning Li (2): > iommu/io-pgtable-arm-v7s: Add a quirk to allow pgtable PA up to > 35bit > iomm/mediatek: Allow page table PA up to 35bit > > drivers/iommu/io-pgtable-arm-v7s.c | 56 ++++++++++++++++++++++---- > ---- > drivers/iommu/mtk_iommu.c | 29 +++++++++++++--- > include/linux/io-pgtable.h | 15 +++++--- > 3 files changed, 77 insertions(+), 23 deletions(-) > >
On Sat, 2022-05-14 at 10:09 +0800, Yong Wu wrote: > On Thu, 2022-05-12 at 22:45 +0800, yf.wang@mediatek.com wrote: > > This patchset adds MediaTek TTBR up to 35bit support. > > > > > > Changes in v3: > > - Add version changes description, there is No new code change in > > V3. > > > > Changes in v2: > > - Update patch and commit message > > - Add Level 1 pgtable PA up to 35bit. > > Why add this for lvl1 pgtable? Did you get real problem? > > lvl2 pgtable is allocated/freed dynamically, it may be allocated > failed > in ZONE_DMA32 when burning test. But the lvl1 pgtable only is > allocated > once after bootup. I think this is no need for lvl1 pgtable. Hi Yong, There is no DMA32 zone in some mediatek smartphone chip. Thanks, Yunfei.