diff options
Diffstat (limited to 'sys-kernel')
| -rw-r--r-- | sys-kernel/gentoo-sources/override_for_missing_acs_capabilities.patch | 124 |
1 files changed, 0 insertions, 124 deletions
diff --git a/sys-kernel/gentoo-sources/override_for_missing_acs_capabilities.patch b/sys-kernel/gentoo-sources/override_for_missing_acs_capabilities.patch deleted file mode 100644 index 00f864e..0000000 --- a/sys-kernel/gentoo-sources/override_for_missing_acs_capabilities.patch +++ /dev/null @@ -1,124 +0,0 @@ ---- a/drivers/pci/quirks.c 2020-05-12 20:48:40.153152132 +0300 -+++ b/drivers/pci/quirks.c 2020-05-13 15:59:18.477619314 +0300 -@@ -4695,6 +4695,111 @@ - PCI_ACS_SV | PCI_ACS_RR | PCI_ACS_CR | PCI_ACS_UF); - } - -+/* -+* PCIe ACS Override -+*/ -+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; -@@ -5001,6 +5001,8 @@ - /* Zhaoxin Root/Downstream Ports */ - { 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 }, -+ /* IOMMU ACS override patch */ -+ { PCI_ANY_ID, PCI_ANY_ID, pcie_acs_overrides }, - { 0 } - }; - |