On Tue, Apr 13, 2021 at 02:35:14AM -0400, Alexandre Ghiti wrote: > From: Vitaly Wool <vitaly.wool@xxxxxxxxxxxx> > > Introduce XIP (eXecute In Place) support for RISC-V platforms. > It allows code to be executed directly from non-volatile storage > directly addressable by the CPU, such as QSPI NOR flash which can > be found on many RISC-V platforms. This makes way for significant > optimization of RAM footprint. The XIP kernel is not compressed > since it has to run directly from flash, so it will occupy more > space on the non-volatile storage. The physical flash address used > to link the kernel object files and for storing it has to be known > at compile time and is represented by a Kconfig option. > > XIP on RISC-V will for the time being only work on MMU-enabled > kernels. > > Signed-off-by: Alexandre Ghiti <alex@xxxxxxxx> [ Rebase on top of "Move > kernel mapping outside the linear mapping" ] > Signed-off-by: Vitaly Wool <vitaly.wool@xxxxxxxxxxxx> > Reported-by: Naresh Kamboju <naresh.kamboju@xxxxxxxxxx> In next-20210426, when building riscv:allnoconfig or riscv:tinyconfig: arch/riscv/kernel/setup.c: In function 'setup_arch': arch/riscv/kernel/setup.c:284:32: error: implicit declaration of function 'XIP_FIXUP' Guenter
