Le 30/07/2019 à 09:42, Jason Yan a écrit :
> Now the kernel base is a fixed value - KERNELBASE. To support KASLR, we
> need a variable to store the kernel base.
>
> Signed-off-by: Jason Yan <[email protected]>
> Cc: Diana Craciun <[email protected]>
> Cc: Michael Ellerman <[email protected]>
> Cc: Christophe Leroy <[email protected]>
> Cc: Benjamin Herrenschmidt <[email protected]>
> Cc: Paul Mackerras <[email protected]>
> Cc: Nicholas Piggin <[email protected]>
> Cc: Kees Cook <[email protected]>
Reviewed-by: Christophe Leroy <[email protected]>
> ---
> arch/powerpc/include/asm/page.h | 2 ++
> arch/powerpc/mm/init-common.c | 2 ++
> 2 files changed, 4 insertions(+)
>
> diff --git a/arch/powerpc/include/asm/page.h b/arch/powerpc/include/asm/page.h
> index 0d52f57fca04..60a68d3a54b1 100644
> --- a/arch/powerpc/include/asm/page.h
> +++ b/arch/powerpc/include/asm/page.h
> @@ -315,6 +315,8 @@ void arch_free_page(struct page *page, int order);
>
> struct vm_area_struct;
>
> +extern unsigned long kimage_vaddr;
> +
> #include <asm-generic/memory_model.h>
> #endif /* __ASSEMBLY__ */
> #include <asm/slice.h>
> diff --git a/arch/powerpc/mm/init-common.c b/arch/powerpc/mm/init-common.c
> index 152ae0d21435..d4801ce48dc5 100644
> --- a/arch/powerpc/mm/init-common.c
> +++ b/arch/powerpc/mm/init-common.c
> @@ -25,6 +25,8 @@ phys_addr_t memstart_addr = (phys_addr_t)~0ull;
> EXPORT_SYMBOL_GPL(memstart_addr);
> phys_addr_t kernstart_addr;
> EXPORT_SYMBOL_GPL(kernstart_addr);
> +unsigned long kimage_vaddr = KERNELBASE;
> +EXPORT_SYMBOL_GPL(kimage_vaddr);
>
> static bool disable_kuep = !IS_ENABLED(CONFIG_PPC_KUEP);
> static bool disable_kuap = !IS_ENABLED(CONFIG_PPC_KUAP);
>