arm-bsp/linux-yocto: add recipe for v6.4 kernel

The v6.4 kernel is needed for some platforms in meta-arm-bsp.
Temporarily add it here to give those machines enough time to
update to the latest version.  Also, add the patch to the
defconfig.

Signed-off-by: Jon Mason <jon.mason@arm.com>

meta-arm-bsp/recipes-kernel/linux/files/aarch64/0001-arm64-defconfig-remove-CONFIG_COMMON_CLK_NPCM8XX-y.patch

@@ -0,0 +1,50 @@
+From 94a5e7ffe5855272708a94190820534c4f51bdd8 Mon Sep 17 00:00:00 2001
+From: Mikko Rapeli <mikko.rapeli@linaro.org>
+Date: Tue, 15 Aug 2023 10:36:56 +0300
+Subject: [PATCH] arm64: defconfig: remove CONFIG_COMMON_CLK_NPCM8XX=y
+
+There is no code for this config option and enabling it in defconfig
+causes warnings from tools which are detecting unused and obsolete
+kernel config flags since the flag will be completely missing from
+effective build config after "make olddefconfig".
+
+Fixes yocto kernel recipe build time warning:
+
+WARNING: [kernel config]: This BSP contains fragments with warnings:
+...
+[INFO]: the following symbols were not found in the active
+configuration:
+     - CONFIG_COMMON_CLK_NPCM8XX
+
+The flag was added with commit 45472f1e5348c7b755b4912f2f529ec81cea044b
+v5.19-rc4-15-g45472f1e5348 so 6.1 and 6.4 stable kernel trees are
+affected.
+
+Fixes: 45472f1e5348c7b755b4912f2f529ec81cea044b ("arm64: defconfig: Add Nuvoton NPCM family support")
+Cc: stable@kernel.org
+Cc: Bruce Ashfield <bruce.ashfield@gmail.com>
+Cc: Jon Mason <jon.mason@arm.com>
+Cc: Jon Mason <jdmason@kudzu.us>
+Cc: Ross Burton <ross@burtonini.com>
+Cc: Arnd Bergmann <arnd@arndb.de>
+Signed-off-by: Mikko Rapeli <mikko.rapeli@linaro.org>
+
+Signed-off-by: Jon Mason <jon.mason@arm.com>
+Upstream-Status: Submitted [https://lists.infradead.org/pipermail/linux-arm-kernel/2023-August/859760.html]
+
+---
+ arch/arm64/configs/defconfig | 1 -
+ 1 file changed, 1 deletion(-)
+
+diff --git a/arch/arm64/configs/defconfig b/arch/arm64/configs/defconfig
+index 0777bcae9104..1cf24537fda2 100644
+--- a/arch/arm64/configs/defconfig
++++ b/arch/arm64/configs/defconfig
+@@ -1146,7 +1146,6 @@ CONFIG_COMMON_CLK_S2MPS11=y
+ CONFIG_COMMON_CLK_PWM=y
+ CONFIG_COMMON_CLK_RS9_PCIE=y
+ CONFIG_COMMON_CLK_VC5=y
+-CONFIG_COMMON_CLK_NPCM8XX=y
+ CONFIG_COMMON_CLK_BD718XX=m
+ CONFIG_CLK_RASPBERRYPI=m
+ CONFIG_CLK_IMX8MM=y

meta-arm-bsp/recipes-kernel/linux/linux-yocto_6.4.bb

@@ -0,0 +1,39 @@
+KBRANCH ?= "v6.4/standard/base"
+
+require recipes-kernel/linux/linux-yocto.inc
+
+# CVE exclusions
+include recipes-kernel/linux/cve-exclusion.inc
+include recipes-kernel/linux/cve-exclusion_6.4.inc
+
+SRCREV_machine ?= "ef91ff6a4be36037808af1ca786fdd557f265a1d"
+SRCREV_meta ?= "13efe44fe9dd2626eaf6552288ea31770ec71cf1"
+
+# set your preferred provider of linux-yocto to 'linux-yocto-upstream', and you'll
+# get the <version>/base branch, which is pure upstream -stable, and the same
+# meta SRCREV as the linux-yocto-standard builds. Select your version using the
+# normal PREFERRED_VERSION settings.
+BBCLASSEXTEND = "devupstream:target"
+SRCREV_machine:class-devupstream ?= "ae4e4fc35b4258626644c162a702e2bce2b79190"
+PN:class-devupstream = "linux-yocto-upstream"
+KBRANCH:class-devupstream = "v6.4/base"
+
+SRC_URI = "git://git.yoctoproject.org/linux-yocto.git;name=machine;branch=${KBRANCH};protocol=https \
+           git://git.yoctoproject.org/yocto-kernel-cache;type=kmeta;name=meta;branch=yocto-6.4;destsuffix=${KMETA};protocol=https"
+
+LIC_FILES_CHKSUM = "file://COPYING;md5=6bc538ed5bd9a7fc9398086aedcd7e46"
+LINUX_VERSION ?= "6.4.16"
+
+PV = "${LINUX_VERSION}+git"
+
+KMETA = "kernel-meta"
+KCONF_BSP_AUDIT_LEVEL = "1"
+
+# Functionality flags
+KERNEL_EXTRA_FEATURES ?= "features/netfilter/netfilter.scc"
+KERNEL_FEATURES:append = " ${KERNEL_EXTRA_FEATURES}"
+KERNEL_FEATURES:append = " ${@bb.utils.contains("TUNE_FEATURES", "mx32", " cfg/x32.scc", "", d)}"
+KERNEL_FEATURES:append = " ${@bb.utils.contains("DISTRO_FEATURES", "ptest", " features/scsi/scsi-debug.scc", "", d)}"
+KERNEL_FEATURES:append = " ${@bb.utils.contains("DISTRO_FEATURES", "ptest", " features/gpio/mockup.scc", "", d)}"
+
+SRC_URI:append:aarch64 = " file://0001-arm64-defconfig-remove-CONFIG_COMMON_CLK_NPCM8XX-y.patch"