* Kirill A. Shutemov <[email protected]> wrote:
> We are going to support boot-time switching between 4- and 5-level
> paging. For KASAN it means we cannot have different KASAN_SHADOW_OFFSET
> for different paging modes: the constant is passed to gcc to generate
> code and cannot be changed at runtime.
>
> This patch changes KASAN code to use 0xdffffc0000000000 as shadow offset
> for both 4- and 5-level paging.
>
> For 5-level paging it means that shadow memory region is not aligned to
> PGD boundary anymore and we have to handle unaligned parts of the region
> properly.
>
> In addition, we have to exclude paravirt code from KASAN instrumentation
> as we now use set_pgd() before KASAN is fully ready.
>
> Signed-off-by: Andrey Ryabinin <[email protected]>
> [[email protected]: clenaup, changelog message]
> Signed-off-by: Kirill A. Shutemov <[email protected]>
Bad SOB chain. If Andrey the true author of this patch then it be reflected in
a
"From:" line.
> ---
> arch/x86/Kconfig | 1 -
> arch/x86/kernel/Makefile | 3 +-
> arch/x86/mm/kasan_init_64.c | 86
> ++++++++++++++++++++++++++++++++++-----------
> 3 files changed, 67 insertions(+), 23 deletions(-)
This is a lot of complex code added with exactly zero lines of comments that
explains all the complexity ...
Thanks,
Ingo
