On Thu, Jun 1, 2023 at 3:13 AM Mike Rapoport <rppt@xxxxxxxxxx> wrote: > > From: "Mike Rapoport (IBM)" <rppt@xxxxxxxxxx> > > Extend jitalloc parameters to accommodate more complex overrides of > module_alloc() by architectures. > > This includes specification of a fallback range required by arm, arm64 > and powerpc and support for allocation of KASAN shadow required by > arm64, s390 and x86. > > The core implementation of jit_alloc() takes care of suppressing warnings > when the initial allocation fails but there is a fallback range defined. > > Signed-off-by: Mike Rapoport (IBM) <rppt@xxxxxxxxxx> [...] > > diff --git a/arch/arm64/kernel/module.c b/arch/arm64/kernel/module.c > index 5af4975caeb5..ecf1f4030317 100644 > --- a/arch/arm64/kernel/module.c > +++ b/arch/arm64/kernel/module.c > @@ -17,56 +17,49 @@ > #include <linux/moduleloader.h> > #include <linux/scs.h> > #include <linux/vmalloc.h> > +#include <linux/jitalloc.h> > #include <asm/alternative.h> > #include <asm/insn.h> > #include <asm/scs.h> > #include <asm/sections.h> > > -void *module_alloc(unsigned long size) > +static struct jit_alloc_params jit_alloc_params = { > + .alignment = MODULE_ALIGN, > + .flags = JIT_ALLOC_KASAN_SHADOW, > +}; > + > +struct jit_alloc_params *jit_alloc_arch_params(void) > { > u64 module_alloc_end = module_alloc_base + MODULES_VSIZE; module_alloc_base() is initialized in kaslr_init(), which is called after mm_core_init(). We will need some special logic for this. Thanks, Song > - gfp_t gfp_mask = GFP_KERNEL; > - void *p; > - > - /* Silence the initial allocation */ > - if (IS_ENABLED(CONFIG_ARM64_MODULE_PLTS)) > - gfp_mask |= __GFP_NOWARN; > [...]