Please ignore this patch, its sent by mistake to wrong mailing list. Thanks, Tejas
> -----Original Message----- > From: Surendrakumar Upadhyay, TejaskumarX > <[email protected]> > Sent: 02 March 2022 10:00 > To: [email protected] > Cc: [email protected]; Surendrakumar Upadhyay, > TejaskumarX <[email protected]>; Talla, > RavitejaX Goud <[email protected]>; Vivi, Rodrigo > <[email protected]>; Lu Baolu <[email protected]> > Subject: [PATCH] iommu/vt-d: Add RPLS to quirk list to skip TE disabling > > The VT-d spec requires (10.4.4 Global Command Register, TE > field) that: > > Hardware implementations supporting DMA draining must drain any in-flight > DMA read/write requests queued within the Root-Complex before > completing the translation enable command and reflecting the status of the > command through the TES field in the Global Status register. > > Unfortunately, some integrated graphic devices fail to do so after some kind > of power state transition. As the result, the system might stuck in > iommu_disable_translati on(), waiting for the completion of TE transition. > > This adds RPLS to a quirk list for those devices and skips TE disabling if the > qurik hits. > > Link: https://gitlab.freedesktop.org/drm/intel/-/issues/4898 > Tested-by: Raviteja Goud Talla <[email protected]> > Cc: Rodrigo Vivi <[email protected]> > Acked-by: Lu Baolu <[email protected]> > Signed-off-by: Tejas Upadhyay > <[email protected]> > --- > drivers/iommu/intel/iommu.c | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/drivers/iommu/intel/iommu.c b/drivers/iommu/intel/iommu.c > index 639e4438827e..bd6dac90a948 100644 > --- a/drivers/iommu/intel/iommu.c > +++ b/drivers/iommu/intel/iommu.c > @@ -5741,7 +5741,7 @@ static void quirk_igfx_skip_te_disable(struct > pci_dev *dev) > ver = (dev->device >> 8) & 0xff; > if (ver != 0x45 && ver != 0x46 && ver != 0x4c && > ver != 0x4e && ver != 0x8a && ver != 0x98 && > - ver != 0x9a) > + ver != 0x9a && ver != 0xa7) > return; > > if (risky_device(dev)) > -- > 2.34.1 _______________________________________________ iommu mailing list [email protected] https://lists.linuxfoundation.org/mailman/listinfo/iommu
