kernel: generic: Add kernel 4.14 support

This adds initial support for kernel 4.14 based on the patches for
kernel 4.9.

In the configuration I deactivated some of the new possible security
features like:
CONFIG_REFCOUNT_FULL
CONFIG_SLAB_FREELIST_HARDENED
CONFIG_SOFTLOCKUP_DETECTOR
CONFIG_WARN_ALL_UNSEEDED_RANDOM

And these overlay FS options are also deactivated:
CONFIG_OVERLAY_FS_INDEX
CONFIG_OVERLAY_FS_REDIRECT_DIR

I activated this:
CONFIG_FORTIFY_SOURCE
CONFIG_POSIX_TIMERS
CONFIG_SLAB_MERGE_DEFAULT
CONFIG_WATCHDOG_HANDLE_BOOT_ENABLED

I am not sure if I did the porting correct for the following patches:
target/linux/generic/backport-4.14/020-backport_netfilter_rtcache.patch
target/linux/generic/hack-4.14/220-gc_sections.patch
target/linux/generic/hack-4.14/321-powerpc_crtsavres_prereq.patch
target/linux/generic/pending-4.14/305-mips_module_reloc.patch
target/linux/generic/pending-4.14/611-netfilter_match_bypass_default_table.patch
target/linux/generic/pending-4.14/680-NET-skip-GRO-for-foreign-MAC-addresses.patch

Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>

1 files changed, 127 insertions, 0 deletions

diff --git a/target/linux/generic/pending-4.14/681-NET-add-of_get_mac_address_mtd.patch b/target/linux/generic/pending-4.14/681-NET-add-of_get_mac_address_mtd.patch
new file mode 100644
index 0000000..b29b5f1
--- /dev/null
+++ b/target/linux/generic/pending-4.14/681-NET-add-of_get_mac_address_mtd.patch
@@ -0,0 +1,127 @@
+From: John Crispin <blogic@openwrt.org>
+Subject: NET: add mtd-mac-address support to of_get_mac_address()
+
+Many embedded devices have information such as mac addresses stored inside mtd
+devices. This patch allows us to add a property inside a node describing a
+network interface. The new property points at a mtd partition with an offset
+where the mac address can be found.
+
+Signed-off-by: John Crispin <blogic@openwrt.org>
+Signed-off-by: Felix Fietkau <nbd@nbd.name>
+---
+ drivers/of/of_net.c    |   37 +++++++++++++++++++++++++++++++++++++
+ include/linux/of_net.h |    1 +
+ 2 files changed, 38 insertions(+)
+
+--- a/drivers/of/of_net.c
++++ b/drivers/of/of_net.c
+@@ -10,6 +10,7 @@
+ #include <linux/of_net.h>
+ #include <linux/phy.h>
+ #include <linux/export.h>
++#include <linux/mtd/mtd.h>
+ 
+ /**
+  * of_get_phy_mode - Get phy mode for given device_node
+@@ -38,7 +39,7 @@ int of_get_phy_mode(struct device_node *
+ }
+ EXPORT_SYMBOL_GPL(of_get_phy_mode);
+ 
+-static const void *of_get_mac_addr(struct device_node *np, const char *name)
++static void *of_get_mac_addr(struct device_node *np, const char *name)
+ {
+ 	struct property *pp = of_find_property(np, name, NULL);
+ 
+@@ -47,6 +48,73 @@ static const void *of_get_mac_addr(struc
+ 	return NULL;
+ }
+ 
++static const void *of_get_mac_address_mtd(struct device_node *np)
++{
++#ifdef CONFIG_MTD
++	struct device_node *mtd_np = NULL;
++	struct property *prop;
++	size_t retlen;
++	int size, ret;
++	struct mtd_info *mtd;
++	const char *part;
++	const __be32 *list;
++	phandle phandle;
++	u32 mac_inc = 0;
++	u8 mac[ETH_ALEN];
++	void *addr;
++
++	list = of_get_property(np, "mtd-mac-address", &size);
++	if (!list || (size != (2 * sizeof(*list))))
++		return NULL;
++
++	phandle = be32_to_cpup(list++);
++	if (phandle)
++		mtd_np = of_find_node_by_phandle(phandle);
++
++	if (!mtd_np)
++		return NULL;
++
++	part = of_get_property(mtd_np, "label", NULL);
++	if (!part)
++		part = mtd_np->name;
++
++	mtd = get_mtd_device_nm(part);
++	if (IS_ERR(mtd))
++		return NULL;
++
++	ret = mtd_read(mtd, be32_to_cpup(list), 6, &retlen, mac);
++	put_mtd_device(mtd);
++
++	if (!of_property_read_u32(np, "mtd-mac-address-increment", &mac_inc))
++		mac[5] += mac_inc;
++
++	if (!is_valid_ether_addr(mac))
++		return NULL;
++
++	addr = of_get_mac_addr(np, "mac-address");
++	if (addr) {
++		memcpy(addr, mac, ETH_ALEN);
++		return addr;
++	}
++
++	prop = kzalloc(sizeof(*prop), GFP_KERNEL);
++	if (!prop)
++		return NULL;
++
++	prop->name = "mac-address";
++	prop->length = ETH_ALEN;
++	prop->value = kmemdup(mac, ETH_ALEN, GFP_KERNEL);
++	if (!prop->value || of_add_property(np, prop))
++		goto free;
++
++	return prop->value;
++free:
++	kfree(prop->value);
++	kfree(prop);
++#endif
++	return NULL;
++}
++
+ /**
+  * Search the device tree for the best MAC address to use.  'mac-address' is
+  * checked first, because that is supposed to contain to "most recent" MAC
+@@ -64,11 +132,18 @@ static const void *of_get_mac_addr(struc
+  * addresses.  Some older U-Boots only initialized 'local-mac-address'.  In
+  * this case, the real MAC is in 'local-mac-address', and 'mac-address' exists
+  * but is all zeros.
++ *
++ * If a mtd-mac-address property exists, try to fetch the MAC address from the
++ * specified mtd device, and store it as a 'mac-address' property
+ */
+ const void *of_get_mac_address(struct device_node *np)
+ {
+ 	const void *addr;
+ 
++	addr = of_get_mac_address_mtd(np);
++	if (addr)
++		return addr;
++
+ 	addr = of_get_mac_addr(np, "mac-address");
+ 	if (addr)
+ 		return addr;