On Tue, Jan 14, 2025, Valentin Schneider wrote: > Later patches will require issuing a __flush_tlb_all() from noinstr code. > This requires making both __flush_tlb_local() and __flush_tlb_global() > noinstr-compliant. > > For __flush_tlb_local(), xen_flush_tlb() has already been made noinstr, so > it's just native_flush_tlb_global(), and simply __always_inline'ing > invalidate_user_asid() gets us there > > Signed-off-by: Valentin Schneider <vschneid@xxxxxxxxxx> > --- ... > @@ -1206,7 +1206,7 @@ STATIC_NOPV noinstr void native_flush_tlb_global(void) > /* > * Flush the entire current user mapping > */ > -STATIC_NOPV void native_flush_tlb_local(void) > +STATIC_NOPV noinstr void native_flush_tlb_local(void) native_write_cr3() and __native_read_cr3() need to be __always_inline. vmlinux.o: warning: objtool: native_flush_tlb_local+0x8: call to __native_read_cr3() leaves .noinstr.text section
