current/SOURCES/iommu-intel-Disable-source-id-verification-for-ITHC.patch

From 2d5bd3e7dfa89a691941ffb5a047ca094b654fc9 Mon Sep 17 00:00:00 2001
From: Dorian Stoll <dorian.stoll@tmsp.io>
Date: Sun, 11 Dec 2022 12:03:38 +0100
Subject: [PATCH] iommu: intel: Disable source id verification for ITHC

Signed-off-by: Dorian Stoll <dorian.stoll@tmsp.io>
Patchset: ithc
---
 drivers/iommu/intel/irq_remapping.c | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

diff --git a/drivers/iommu/intel/irq_remapping.c b/drivers/iommu/intel/irq_remapping.c
index 5962bb5027d06..86fa129d10d40 100644
--- a/drivers/iommu/intel/irq_remapping.c
+++ b/drivers/iommu/intel/irq_remapping.c
@@ -396,6 +396,22 @@ static int set_msi_sid(struct irte *irte, struct pci_dev *dev)
        data.busmatch_count = 0;
        pci_for_each_dma_alias(dev, set_msi_sid_cb, &data);
 
+       /*
+        * The Intel Touch Host Controller is at 00:10.6, but for some reason
+        * the MSI interrupts have request id 01:05.0.
+        * Disable id verification to work around this.
+        * FIXME Find proper fix or turn this into a quirk.
+        */
+       if (dev->vendor == PCI_VENDOR_ID_INTEL && (dev->class >> 8) == PCI_CLASS_INPUT_PEN) {
+               switch(dev->device) {
+               case 0x98d0: case 0x98d1: // LKF
+               case 0xa0d0: case 0xa0d1: // TGL LP
+               case 0x43d0: case 0x43d1: // TGL H
+                       set_irte_sid(irte, SVT_NO_VERIFY, SQ_ALL_16, 0);
+                       return 0;
+               }
+       }
+
        /*
         * DMA alias provides us with a PCI device and alias.  The only case
         * where the it will return an alias on a different bus than the
1	From 2d5bd3e7dfa89a691941ffb5a047ca094b654fc9 Mon Sep 17 00:00:00 2001
2	From: Dorian Stoll <dorian.stoll@tmsp.io>
3	Date: Sun, 11 Dec 2022 12:03:38 +0100
4	Subject: [PATCH] iommu: intel: Disable source id verification for ITHC
5
6	Signed-off-by: Dorian Stoll <dorian.stoll@tmsp.io>
7	Patchset: ithc
8	---
9	drivers/iommu/intel/irq_remapping.c \| 16 ++++++++++++++++
10	1 file changed, 16 insertions(+)
11
12	diff --git a/drivers/iommu/intel/irq_remapping.c b/drivers/iommu/intel/irq_remapping.c
13	index 5962bb5027d06..86fa129d10d40 100644
14	--- a/drivers/iommu/intel/irq_remapping.c
15	+++ b/drivers/iommu/intel/irq_remapping.c
16	@@ -396,6 +396,22 @@ static int set_msi_sid(struct irte irte, struct pci_dev dev)
17	data.busmatch_count = 0;
18	pci_for_each_dma_alias(dev, set_msi_sid_cb, &data);
19
20	+ /*
21	+ * The Intel Touch Host Controller is at 00:10.6, but for some reason
22	+ * the MSI interrupts have request id 01:05.0.
23	+ * Disable id verification to work around this.
24	+ * FIXME Find proper fix or turn this into a quirk.
25	+ */
26	+ if (dev->vendor == PCI_VENDOR_ID_INTEL && (dev->class >> 8) == PCI_CLASS_INPUT_PEN) {
27	+ switch(dev->device) {
28	+ case 0x98d0: case 0x98d1: // LKF
29	+ case 0xa0d0: case 0xa0d1: // TGL LP
30	+ case 0x43d0: case 0x43d1: // TGL H
31	+ set_irte_sid(irte, SVT_NO_VERIFY, SQ_ALL_16, 0);
32	+ return 0;
33	+ }
34	+ }
35	+
36	/*
37	* DMA alias provides us with a PCI device and alias. The only case
38	* where the it will return an alias on a different bus than the