1 files changed, 0 insertions, 195 deletions
diff --git a/SOURCES/acso.patch b/SOURCES/acso.patch
deleted file mode 100644
index 424fab4..0000000
--- a/SOURCES/acso.patch
+++ /dev/null
@@ -1,195 +0,0 @@
-From fd848b79a1acbe986bcf604826c2fa5fab06566e Mon Sep 17 00:00:00 2001
-From: Mark Weiman <mark.weiman@markzz.com>
-Date: Sun, 12 Aug 2018 11:36:21 -0400
-Subject: [PATCH 03/36] pci: Enable overrides for missing ACS capabilities
-
-This an updated version of Alex Williamson's patch from:
-https://lkml.org/lkml/2013/5/30/513
-
-Original commit message follows:
-
-PCIe ACS (Access Control Services) is the PCIe 2.0+ feature that
-allows us to control whether transactions are allowed to be redirected
-in various subnodes of a PCIe topology.  For instance, if two
-endpoints are below a root port or downsteam switch port, the
-downstream port may optionally redirect transactions between the
-devices, bypassing upstream devices.  The same can happen internally
-on multifunction devices.  The transaction may never be visible to the
-upstream devices.
-
-One upstream device that we particularly care about is the IOMMU.  If
-a redirection occurs in the topology below the IOMMU, then the IOMMU
-cannot provide isolation between devices.  This is why the PCIe spec
-encourages topologies to include ACS support.  Without it, we have to
-assume peer-to-peer DMA within a hierarchy can bypass IOMMU isolation.
-
-Unfortunately, far too many topologies do not support ACS to make this
-a steadfast requirement.  Even the latest chipsets from Intel are only
-sporadically supporting ACS.  We have trouble getting interconnect
-vendors to include the PCIe spec required PCIe capability, let alone
-suggested features.
-
-Therefore, we need to add some flexibility.  The pcie_acs_override=
-boot option lets users opt-in specific devices or sets of devices to
-assume ACS support.  The "downstream" option assumes full ACS support
-on root ports and downstream switch ports.  The "multifunction"
-option assumes the subset of ACS features available on multifunction
-endpoints and upstream switch ports are supported.  The "id:nnnn:nnnn"
-option enables ACS support on devices matching the provided vendor
-and device IDs, allowing more strategic ACS overrides.  These options
-may be combined in any order.  A maximum of 16 id specific overrides
-are available.  It's suggested to use the most limited set of options
-necessary to avoid completely disabling ACS across the topology.
-Note to hardware vendors, we have facilities to permanently quirk
-specific devices which enforce isolation but not provide an ACS
-capability.  Please contact me to have your devices added and save
-your customers the hassle of this boot option.
-
-Signed-off-by: Mark Weiman <mark.weiman@markzz.com>
-Signed-off-by: Alexandre Frade <admfrade@gmail.com>
----
- .../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 6cfa6e3996cf..fdbe34c0fbf3 100644
---- a/Documentation/admin-guide/kernel-parameters.txt
-+++ b/Documentation/admin-guide/kernel-parameters.txt
-@@ -4178,6 +4178,14 @@
- 		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 494fa46f5767..41150eb8bd4c 100644
---- a/drivers/pci/quirks.c
-+++ b/drivers/pci/quirks.c
-@@ -194,6 +194,106 @@ static int __init pci_apply_final_quirks(void)
- }
- fs_initcall_sync(pci_apply_final_quirks);
- 
-+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;
-+}
-+
- /*
-  * Decoding should be disabled for a PCI device during BAR sizing to avoid
-  * conflict. But doing so may cause problems on host bridge and perhaps other
-@@ -5002,6 +5102,8 @@ 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 }
- };
- 
--- 
-2.39.2