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| author | Russell King <rmk+kernel@armlinux.org.uk> | 2017-07-20 01:09:58 +0300 |
|---|---|---|
| committer | Russell King <rmk+kernel@armlinux.org.uk> | 2017-07-20 13:37:42 +0300 |
| commit | 0d70262a2d60886da6fe5b1fc8bbcd76cbbc306d (patch) | |
| tree | a5ba2a9cc7793d3cc4f14338ea37611356712f38 /arch/arm/include | |
| parent | 67556d7a851c20116923c23f1d49ecdec954e3a0 (diff) | |
| download | linux-0d70262a2d60886da6fe5b1fc8bbcd76cbbc306d.tar.xz | |
ARM: kexec: fix failure to boot crash kernel
When kexec was converted to DTB, the dtb address was passed between
machine_kexec_prepare() and machine_kexec() using a static variable.
This is bad news if you load a crash kernel followed by a normal
kernel or vice versa - the last loaded kernel overwrites the dtb
address.
This can result in kexec failures, as (eg) we try to boot the crash
kernel with the last loaded dtb. For example, with:
the crash kernel fails to find the dtb.
Avoid this by defining a kimage architecture structure, and store
the address to be passed in r2 there, which will either be the ATAGs
or the dtb blob.
Fixes: 4cabd1d9625c ("ARM: 7539/1: kexec: scan for dtb magic in segments")
Fixes: 42d720d1731a ("ARM: kexec: Make .text R/W in machine_kexec")
Reported-by: Keerthy <j-keerthy@ti.com>
Tested-by: Keerthy <j-keerthy@ti.com>
Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
Diffstat (limited to 'arch/arm/include')
| -rw-r--r-- | arch/arm/include/asm/kexec.h | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/arch/arm/include/asm/kexec.h b/arch/arm/include/asm/kexec.h index 1869af6bac5c..25021b798a1e 100644 --- a/arch/arm/include/asm/kexec.h +++ b/arch/arm/include/asm/kexec.h @@ -19,6 +19,11 @@ #ifndef __ASSEMBLY__ +#define ARCH_HAS_KIMAGE_ARCH +struct kimage_arch { + u32 kernel_r2; +}; + /** * crash_setup_regs() - save registers for the panic kernel * @newregs: registers are saved here |