Messages in this thread | | | Subject | Re: [RFC PATCH 03/10] powerpc: introduce kimage_vaddr to store the kernel base | From | Christophe Leroy <> | Date | Mon, 29 Jul 2019 13:00:28 +0200 |
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Le 17/07/2019 à 10:06, 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 <yanaijie@huawei.com> > Cc: Diana Craciun <diana.craciun@nxp.com> > Cc: Michael Ellerman <mpe@ellerman.id.au> > Cc: Christophe Leroy <christophe.leroy@c-s.fr> > Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> > Cc: Paul Mackerras <paulus@samba.org> > Cc: Nicholas Piggin <npiggin@gmail.com> > Cc: Kees Cook <keescook@chromium.org>
Reviewed-by: Christophe Leroy <christophe.leroy@c-s.fr>
> --- > 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 9273c38009cb..c7a98c73e5c1 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(memstart_addr); > phys_addr_t kernstart_addr; > EXPORT_SYMBOL(kernstart_addr); > +unsigned long kimage_vaddr = KERNELBASE; > +EXPORT_SYMBOL(kimage_vaddr); > > static bool disable_kuep = !IS_ENABLED(CONFIG_PPC_KUEP); > static bool disable_kuap = !IS_ENABLED(CONFIG_PPC_KUAP); >
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