powerpc/fsl_booke/32: implement KASLR infrastructure
This patch add support to boot kernel from places other than KERNELBASE. Since CONFIG_RELOCATABLE has already supported, what we need to do is map or copy kernel to a proper place and relocate. Freescale Book-E parts expect lowmem to be mapped by fixed TLB entries(TLB1). The TLB1 entries are not suitable to map the kernel directly in a randomized region, so we chose to copy the kernel to a proper place and restart to relocate. The offset of the kernel was not randomized yet(a fixed 64M is set). We will randomize it in the next patch. Signed-off-by:Jason Yan <yanaijie@huawei.com> Tested-by:
Diana Craciun <diana.craciun@nxp.com> Reviewed-by:
Christophe Leroy <christophe.leroy@c-s.fr> Signed-off-by:
Scott Wood <oss@buserror.net> [mpe: Use PTRRELOC() in early_init()] Signed-off-by:
Michael Ellerman <mpe@ellerman.id.au>
parent
c061b38a
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