On Thu, Sep 13, 2018 at 3:46 AM, Chao Fan <fanc.fnst@xxxxxxxxxxxxxx> wrote: > If CONFIG_MEMORY_HOTREMOVE enabled, walk through the acpi srat memory > tables and store those immovable memory regions so that kaslr can get > where to choose for randomization. > > Signed-off-by: Chao Fan <fanc.fnst@xxxxxxxxxxxxxx> > --- > arch/x86/boot/compressed/kaslr.c | 5 +++++ > 1 file changed, 5 insertions(+) > > diff --git a/arch/x86/boot/compressed/kaslr.c b/arch/x86/boot/compressed/kaslr.c > index 9ed9709d9947..0c3567bc231c 100644 > --- a/arch/x86/boot/compressed/kaslr.c > +++ b/arch/x86/boot/compressed/kaslr.c > @@ -417,6 +417,11 @@ static void mem_avoid_init(unsigned long input, unsigned long input_size, > /* Mark the memmap regions we need to avoid */ > handle_mem_options(); > > +#ifdef CONFIG_MEMORY_HOTREMOVE > + /* Mark the immovable regions we need to choose */ > + get_immovable_mem(); > +#endif Style nit-pick: I'd prefer the definition of get_immovable_mem() do the ifdef so it doesn't appear here. -Kees > + > #ifdef CONFIG_X86_VERBOSE_BOOTUP > /* Make sure video RAM can be used. */ > add_identity_map(0, PMD_SIZE); > -- > 2.17.1 > > > -- Kees Cook Pixel Security
