Sorry, I forgot the changelog again:
|v4: - Remove the kasan limitation by compiling 'local' fdt functions,
as done in arm64 by Ard - Remove RB from Björn as the cmdline handling
changed v3: - Massage commit log to make no4lvl clearer, as asked by
Conor - Add a note to kernel-parameters.txt regarding the impossibility
to use those parameters when KASAN is enabled, as suggested by Conor -
Add RB from Björn v2: - Honor CMDLINE_EXTEND and CMDLINE_FORCE as
noticed by Björn|
On 1/31/23 16:11, Alexandre Ghiti wrote:
This new version gets rid of the limitation that prevented KASAN kernels
to use the newly introduced parameters.
While looking into KASLR, I fell onto commit aacd149b6238 ("arm64: head:
avoid relocating the kernel twice for KASLR"): it allows to use the fdt
functions very early in the boot process with KASAN enabled by simply
compiling a new version of those functions without instrumentation.
I had to change the handling of the command line parsing to make the
code self-contained in kernel/pi/cmd_early.c to avoid calling too many
__pi prefixed functions from outside this file.
I'll use this approach like arm64 to handle the extraction of the random
seedi from the device tree for KASLR.
@Ard: I copied the "pi" name but I have to admit I don't know what it
means.
Alexandre Ghiti (1):
riscv: Allow to downgrade paging mode from the command line
.../admin-guide/kernel-parameters.txt | 5 +-
arch/riscv/kernel/Makefile | 2 +
arch/riscv/kernel/pi/Makefile | 34 ++++++++++++
arch/riscv/kernel/pi/cmdline_early.c | 52 +++++++++++++++++++
arch/riscv/lib/memcpy.S | 2 +
arch/riscv/lib/memmove.S | 2 +
arch/riscv/mm/init.c | 36 ++++++++++---
7 files changed, 126 insertions(+), 7 deletions(-)
create mode 100644 arch/riscv/kernel/pi/Makefile
create mode 100644 arch/riscv/kernel/pi/cmdline_early.c
