On Wed, Apr 29, 2020 at 09:07:32PM +0200, Ard Biesheuvel wrote:
> On Wed, 29 Apr 2020 at 19:41, Arvind Sankar <nived...@alum.mit.edu> wrote:
> >
> > Add support for the x86 CMDLINE_BOOL and CMDLINE_OVERRIDE configuration
> > options.
> >
> > Signed-off-by: Arvind Sankar <nived...@alum.mit.edu>
> > ---
> > drivers/firmware/efi/libstub/x86-stub.c | 12 ++++++++----
> > 1 file changed, 8 insertions(+), 4 deletions(-)
> >
> > diff --git a/drivers/firmware/efi/libstub/x86-stub.c
> > b/drivers/firmware/efi/libstub/x86-stub.c
> > index 85a924fecc87..0faba30d6406 100644
> > --- a/drivers/firmware/efi/libstub/x86-stub.c
> > +++ b/drivers/firmware/efi/libstub/x86-stub.c
> > @@ -680,7 +680,6 @@ unsigned long efi_main(efi_handle_t handle,
> > unsigned long buffer_start, buffer_end;
> > struct setup_header *hdr = &boot_params->hdr;
> > efi_status_t status;
> > - unsigned long cmdline_paddr;
> >
> > efi_system_table = sys_table_arg;
> >
> > @@ -739,9 +738,14 @@ unsigned long efi_main(efi_handle_t handle,
> > image_offset = 0;
> > }
> >
> > - cmdline_paddr = ((u64)hdr->cmd_line_ptr |
> > - ((u64)boot_params->ext_cmd_line_ptr << 32));
> > - efi_parse_options((char *)cmdline_paddr);
> > +#ifdef CONFIG_CMDLINE_BOOL
> > + efi_parse_options(CONFIG_CMDLINE);
> > +#endif
>
> Can we use IS_ENABLED() here as well?
Unfortunately on x86, CONFIG_CMDLINE is not defined if
CONFIG_CMDLINE_BOOL isn't enabled. So turning this into an
IS_ENABLED(CONFIG_CMDLINE_BOOL) causes a compile error when it's
disabled due to CONFIG_CMDLINE being an undeclared symbol.
>
> > + if (!IS_ENABLED(CONFIG_CMDLINE_OVERRIDE)) {
> > + unsigned long cmdline_paddr = ((u64)hdr->cmd_line_ptr |
> > +
> > ((u64)boot_params->ext_cmd_line_ptr << 32));
> > + efi_parse_options((char *)cmdline_paddr);
> > + }
> >
> > /*
> > * At this point, an initrd may already have been loaded by the
> > --
> > 2.26.2
> >
