From: Tejas Upadhyay Date: Wed, 2 Mar 2022 04:32:56 +0000 (+0530) Subject: iommu/vt-d: Add RPLS to quirk list to skip TE disabling X-Git-Tag: v5.15.73~3866 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=4475d3c3b224ce8c0790198a13a4e72ff60b1226;p=platform%2Fkernel%2Flinux-rpi.git iommu/vt-d: Add RPLS to quirk list to skip TE disabling [ Upstream commit 0a967f5bfd9134b89681cae58deb222e20840e76 ] 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 Cc: Rodrigo Vivi Acked-by: Lu Baolu Signed-off-by: Tejas Upadhyay Reviewed-by: Rodrigo Vivi Signed-off-by: Rodrigo Vivi Link: https://patchwork.freedesktop.org/patch/msgid/20220302043256.191529-1-tejaskumarx.surendrakumar.upadhyay@intel.com Signed-off-by: Sasha Levin --- diff --git a/drivers/iommu/intel/iommu.c b/drivers/iommu/intel/iommu.c index 91a5c75..a1ffb3d 100644 --- a/drivers/iommu/intel/iommu.c +++ b/drivers/iommu/intel/iommu.c @@ -5728,7 +5728,7 @@ 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))