mirror of
https://aur.archlinux.org/linux-vfio.git
synced 2025-07-23 06:53:54 +00:00
6.14.1
This commit is contained in:
xiota
152
1001-6.14.0-add-acs-overrides.patch
Normal file
152
1001-6.14.0-add-acs-overrides.patch
Normal file
@@ -0,0 +1,152 @@
|
||||
From 10155f0a9e245f4fb6dd68785a59c83722d436d7 Mon Sep 17 00:00:00 2001
|
||||
From: xiota <>
|
||||
Date: Wed, 13 Mar 2024 02:36:37 +0000
|
||||
Subject: [PATCH] add-acs-overrides
|
||||
|
||||
---
|
||||
.../admin-guide/kernel-parameters.txt | 8 ++
|
||||
drivers/pci/quirks.c | 102 ++++++++++++++++++
|
||||
2 files changed, 110 insertions(+)
|
||||
|
||||
diff --git a/Documentation/admin-guide/kernel-parameters.txt b/Documentation/admin-guide/kernel-parameters.txt
|
||||
index fb8752b42..f652c063a 100644
|
||||
--- a/Documentation/admin-guide/kernel-parameters.txt
|
||||
+++ b/Documentation/admin-guide/kernel-parameters.txt
|
||||
@@ -4642,6 +4642,14 @@
|
||||
nomsi [MSI] If the PCI_MSI kernel config parameter is
|
||||
enabled, this kernel boot option can be used to
|
||||
disable the use of MSI interrupts system-wide.
|
||||
+ pci_acs_override [PCIE] Override missing PCIe ACS support for:
|
||||
+ downstream
|
||||
+ All downstream ports - full ACS capabilities
|
||||
+ multifunction
|
||||
+ Add multifunction devices - multifunction ACS subset
|
||||
+ id:nnnn:nnnn
|
||||
+ Specific device - full ACS capabilities
|
||||
+ Specified as vid:did (vendor/device ID) in hex
|
||||
noioapicquirk [APIC] Disable all boot interrupt quirks.
|
||||
Safety option to keep boot IRQs enabled. This
|
||||
should never be necessary.
|
||||
diff --git a/drivers/pci/quirks.c b/drivers/pci/quirks.c
|
||||
index 82b21e34c..b9cc12277 100644
|
||||
--- a/drivers/pci/quirks.c
|
||||
+++ b/drivers/pci/quirks.c
|
||||
@@ -5018,6 +5018,106 @@ static int pci_quirk_wangxun_nic_acs(struct pci_dev *dev, u16 acs_flags)
|
||||
return false;
|
||||
}
|
||||
|
||||
+static bool acs_on_downstream;
|
||||
+static bool acs_on_multifunction;
|
||||
+
|
||||
+#define NUM_ACS_IDS 16
|
||||
+struct acs_on_id {
|
||||
+ unsigned short vendor;
|
||||
+ unsigned short device;
|
||||
+};
|
||||
+static struct acs_on_id acs_on_ids[NUM_ACS_IDS];
|
||||
+static u8 max_acs_id;
|
||||
+
|
||||
+static __init int pcie_acs_override_setup(char *p)
|
||||
+{
|
||||
+ if (!p)
|
||||
+ return -EINVAL;
|
||||
+
|
||||
+ while (*p) {
|
||||
+ if (!strncmp(p, "downstream", 10))
|
||||
+ acs_on_downstream = true;
|
||||
+ if (!strncmp(p, "multifunction", 13))
|
||||
+ acs_on_multifunction = true;
|
||||
+ if (!strncmp(p, "id:", 3)) {
|
||||
+ char opt[5];
|
||||
+ int ret;
|
||||
+ long val;
|
||||
+
|
||||
+ if (max_acs_id >= NUM_ACS_IDS - 1) {
|
||||
+ pr_warn("Out of PCIe ACS override slots (%d)\n",
|
||||
+ NUM_ACS_IDS);
|
||||
+ goto next;
|
||||
+ }
|
||||
+
|
||||
+ p += 3;
|
||||
+ snprintf(opt, 5, "%s", p);
|
||||
+ ret = kstrtol(opt, 16, &val);
|
||||
+ if (ret) {
|
||||
+ pr_warn("PCIe ACS ID parse error %d\n", ret);
|
||||
+ goto next;
|
||||
+ }
|
||||
+ acs_on_ids[max_acs_id].vendor = val;
|
||||
+ p += strcspn(p, ":");
|
||||
+ if (*p != ':') {
|
||||
+ pr_warn("PCIe ACS invalid ID\n");
|
||||
+ goto next;
|
||||
+ }
|
||||
+
|
||||
+ p++;
|
||||
+ snprintf(opt, 5, "%s", p);
|
||||
+ ret = kstrtol(opt, 16, &val);
|
||||
+ if (ret) {
|
||||
+ pr_warn("PCIe ACS ID parse error %d\n", ret);
|
||||
+ goto next;
|
||||
+ }
|
||||
+ acs_on_ids[max_acs_id].device = val;
|
||||
+ max_acs_id++;
|
||||
+ }
|
||||
+next:
|
||||
+ p += strcspn(p, ",");
|
||||
+ if (*p == ',')
|
||||
+ p++;
|
||||
+ }
|
||||
+
|
||||
+ if (acs_on_downstream || acs_on_multifunction || max_acs_id)
|
||||
+ pr_warn("Warning: PCIe ACS overrides enabled; This may allow non-IOMMU protected peer-to-peer DMA\n");
|
||||
+
|
||||
+ return 0;
|
||||
+}
|
||||
+early_param("pcie_acs_override", pcie_acs_override_setup);
|
||||
+
|
||||
+static int pcie_acs_overrides(struct pci_dev *dev, u16 acs_flags)
|
||||
+{
|
||||
+ int i;
|
||||
+
|
||||
+ /* Never override ACS for legacy devices or devices with ACS caps */
|
||||
+ if (!pci_is_pcie(dev) ||
|
||||
+ pci_find_ext_capability(dev, PCI_EXT_CAP_ID_ACS))
|
||||
+ return -ENOTTY;
|
||||
+
|
||||
+ for (i = 0; i < max_acs_id; i++)
|
||||
+ if (acs_on_ids[i].vendor == dev->vendor &&
|
||||
+ acs_on_ids[i].device == dev->device)
|
||||
+ return 1;
|
||||
+
|
||||
+switch (pci_pcie_type(dev)) {
|
||||
+ case PCI_EXP_TYPE_DOWNSTREAM:
|
||||
+ case PCI_EXP_TYPE_ROOT_PORT:
|
||||
+ if (acs_on_downstream)
|
||||
+ return 1;
|
||||
+ break;
|
||||
+ case PCI_EXP_TYPE_ENDPOINT:
|
||||
+ case PCI_EXP_TYPE_UPSTREAM:
|
||||
+ case PCI_EXP_TYPE_LEG_END:
|
||||
+ case PCI_EXP_TYPE_RC_END:
|
||||
+ if (acs_on_multifunction && dev->multifunction)
|
||||
+ return 1;
|
||||
+ }
|
||||
+
|
||||
+ return -ENOTTY;
|
||||
+}
|
||||
+
|
||||
static const struct pci_dev_acs_enabled {
|
||||
u16 vendor;
|
||||
u16 device;
|
||||
@@ -5171,6 +5271,8 @@ static const struct pci_dev_acs_enabled {
|
||||
{ PCI_VENDOR_ID_ZHAOXIN, PCI_ANY_ID, pci_quirk_zhaoxin_pcie_ports_acs },
|
||||
/* Wangxun nics */
|
||||
{ PCI_VENDOR_ID_WANGXUN, PCI_ANY_ID, pci_quirk_wangxun_nic_acs },
|
||||
+ /* allow acs for any */
|
||||
+ { PCI_ANY_ID, PCI_ANY_ID, pcie_acs_overrides },
|
||||
{ 0 }
|
||||
};
|
||||
|
||||
--
|
||||
2.49.0
|
||||
|
||||
Reference in New Issue
Block a user