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| author | Felix Fietkau <nbd@nbd.name> | 2017-03-07 20:22:50 +0100 |
|---|---|---|
| committer | Felix Fietkau <nbd@nbd.name> | 2017-03-08 14:38:22 +0100 |
| commit | 2a3952bcd5ab1818da6e7a9859c0e08086f01c3b (patch) | |
| tree | cf9aa75507b4e0b713b1cc7151bc38155a49402e /target/linux/ipq806x/patches-4.9 | |
| parent | 9f09bd66064cd3a00631d54e579b1fb2baa0b262 (diff) | |
| download | upstream-2a3952bcd5ab1818da6e7a9859c0e08086f01c3b.tar.gz upstream-2a3952bcd5ab1818da6e7a9859c0e08086f01c3b.tar.bz2 upstream-2a3952bcd5ab1818da6e7a9859c0e08086f01c3b.zip | |
kernel: re-apply 300-arch-arm-force-ZRELADDR-on-arch-qcom.patch on 4.9 (FS#549)
Fixes memory corruption issues. See commit bdcba36442a4 for more
details.
Signed-off-by: Felix Fietkau <nbd@nbd.name>
Diffstat (limited to 'target/linux/ipq806x/patches-4.9')
| -rw-r--r-- | target/linux/ipq806x/patches-4.9/300-arch-arm-force-ZRELADDR-on-arch-qcom.patch | 62 |
1 files changed, 62 insertions, 0 deletions
diff --git a/target/linux/ipq806x/patches-4.9/300-arch-arm-force-ZRELADDR-on-arch-qcom.patch b/target/linux/ipq806x/patches-4.9/300-arch-arm-force-ZRELADDR-on-arch-qcom.patch new file mode 100644 index 0000000000..c30856060c --- /dev/null +++ b/target/linux/ipq806x/patches-4.9/300-arch-arm-force-ZRELADDR-on-arch-qcom.patch @@ -0,0 +1,62 @@ +From b12e230f09d4481424e6a5d7e2ae566b6954e83f Mon Sep 17 00:00:00 2001 +From: Mathieu Olivari <mathieu@codeaurora.org> +Date: Wed, 29 Apr 2015 15:21:46 -0700 +Subject: [PATCH] HACK: arch: arm: force ZRELADDR on arch-qcom + +ARCH_QCOM is using the ARCH_MULTIPLATFORM option, as now recommended +on most ARM architectures. This automatically calculate ZRELADDR by +masking PHYS_OFFSET with 0xf8000000. + +However, on IPQ806x, the first ~20MB of RAM is reserved for the hardware +network accelerators, and the bootloader removes this section from the +layout passed from the ATAGS (when used). + +For newer bootloader, when DT is used, this is not a problem, we just +reserve this memory in the device tree. But if the bootloader doesn't +have DT support, then ATAGS have to be used. In this case, the ARM +decompressor will position the kernel in this low mem, which will not be +in the RAM section mapped by the bootloader, which means the kernel will +freeze in the middle of the boot process trying to map the memory. + +As a work around, this patch allows disabling AUTO_ZRELADDR when +ARCH_QCOM is selected. It makes the zImage usage possible on bootloaders +which don't support device-tree, which is the case on certain early +IPQ806x based designs. + +Signed-off-by: Mathieu Olivari <mathieu@codeaurora.org> +--- + arch/arm/Kconfig | 2 +- + arch/arm/Makefile | 2 ++ + arch/arm/mach-qcom/Makefile.boot | 1 + + 3 files changed, 4 insertions(+), 1 deletion(-) + create mode 100644 arch/arm/mach-qcom/Makefile.boot + +--- a/arch/arm/Kconfig ++++ b/arch/arm/Kconfig +@@ -332,7 +332,7 @@ config ARCH_MULTIPLATFORM + depends on MMU + select ARM_HAS_SG_CHAIN + select ARM_PATCH_PHYS_VIRT +- select AUTO_ZRELADDR ++ select AUTO_ZRELADDR if !ARCH_QCOM + select CLKSRC_OF + select COMMON_CLK + select GENERIC_CLOCKEVENTS +--- a/arch/arm/Makefile ++++ b/arch/arm/Makefile +@@ -251,9 +251,11 @@ MACHINE := arch/arm/mach-$(word 1,$(mac + else + MACHINE := + endif ++ifeq ($(CONFIG_ARCH_QCOM),) + ifeq ($(CONFIG_ARCH_MULTIPLATFORM),y) + MACHINE := + endif ++endif + + machdirs := $(patsubst %,arch/arm/mach-%/,$(machine-y)) + platdirs := $(patsubst %,arch/arm/plat-%/,$(sort $(plat-y))) +--- /dev/null ++++ b/arch/arm/mach-qcom/Makefile.boot +@@ -0,0 +1 @@ ++zreladdr-y+= 0x42208000 |