| Date | Thu, 28 Sep 2017 10:19:39 +0200 | From | Ingo Molnar <> | Subject | Re: [PATCHv7 07/19] x86/mm: Make virtual memory layout movable for CONFIG_X86_5LEVEL |
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* Kirill A. Shutemov <kirill.shutemov@linux.intel.com> wrote:
> We need to be able to adjust virtual memory layout at runtime to be able > to switch between 4- and 5-level paging at boot-time. > > KASLR already has movable __VMALLOC_BASE, __VMEMMAP_BASE and __PAGE_OFFSET. > Let's re-use it. > > Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com> > --- > arch/x86/include/asm/kaslr.h | 4 ---- > arch/x86/include/asm/page_64.h | 4 ++++ > arch/x86/include/asm/page_64_types.h | 2 +- > arch/x86/include/asm/pgtable_64_types.h | 2 +- > arch/x86/kernel/head64.c | 9 +++++++++ > arch/x86/mm/kaslr.c | 8 -------- > 6 files changed, 15 insertions(+), 14 deletions(-)
> +#if defined(CONFIG_RANDOMIZE_MEMORY) || defined(CONFIG_X86_5LEVEL) > +#if defined(CONFIG_RANDOMIZE_MEMORY) || defined(CONFIG_X86_5LEVEL) > +#if defined(CONFIG_RANDOMIZE_MEMORY) || defined(CONFIG_X86_5LEVEL)
Yeah, so this calls for a new, properly named Kconfig helper variable.
Thanks,
Ingo
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