Re: [Xen-devel] [PATCH v5 2/3] x86/boot: Introduce the kernel_info.setup_type_max

[Daniel Kiper <daniel.kiper@xxxxxxxxxx>]

On Fri, Nov 08, 2019 at 11:09:30AM +0100, Borislav Petkov wrote:
> On Mon, Nov 04, 2019 at 04:13:53PM +0100, Daniel Kiper wrote:
> > This field contains maximal allowed type for setup_data.
> >
> > This patch does not bump setup_header version in arch/x86/boot/header.S
> > because it will be followed by additional changes coming into the
> > Linux/x86 boot protocol.
> >
> > Suggested-by: H. Peter Anvin (Intel) <hpa@xxxxxxxxx>
> > Signed-off-by: Daniel Kiper <daniel.kiper@xxxxxxxxxx>
> > Reviewed-by: Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx>
> > Reviewed-by: Ross Philipson <ross.philipson@xxxxxxxxxx>
> > Reviewed-by: H. Peter Anvin (Intel) <hpa@xxxxxxxxx>
> > ---
> > v5 - suggestions/fixes:
> >    - move incorrect references to the setup_indirect to the
> >      patch introducing it,
> >    - do not bump setup_header version in arch/x86/boot/header.S
> >      (suggested by H. Peter Anvin).
> > ---
> >  Documentation/x86/boot.rst             | 9 ++++++++-
> >  arch/x86/boot/compressed/kernel_info.S | 5 +++++
> >  arch/x86/include/uapi/asm/bootparam.h  | 3 +++
> >  3 files changed, 16 insertions(+), 1 deletion(-)
> >
> > diff --git a/Documentation/x86/boot.rst b/Documentation/x86/boot.rst
> > index c60fafda9427..1dad6eee8a5c 100644
> > --- a/Documentation/x86/boot.rst
> > +++ b/Documentation/x86/boot.rst
> > @@ -73,7 +73,7 @@ Protocol 2.14:    BURNT BY INCORRECT COMMIT 
> > ae7e1238e68f2a472a125673ab506d49158c188
> >             (x86/boot: Add ACPI RSDP address to setup_header)
> >             DO NOT USE!!! ASSUME SAME AS 2.13.
> >
> > -Protocol 2.15:     (Kernel 5.5) Added the kernel_info.
> > +Protocol 2.15:     (Kernel 5.5) Added the kernel_info and 
> > kernel_info.setup_type_max.
> >  =============      
> > ============================================================
> >
> >  .. note::
> > @@ -981,6 +981,13 @@ Offset/size:   0x0008/4
> >    This field contains the size of the kernel_info including 
> > kernel_info.header
> >    and kernel_info.kernel_info_var_len_data.
> >
> > +============       ==============
> > +Field name:        setup_type_max
> > +Offset/size:       0x0008/4
>
> You already have
>
> Field name:     size_total
> Offset/size:    0x0008/4
>
> at that offset.
>
> I guess you mean setup_type_max's offset to be 0x000c and it would be
> that member:
>
> .long   0x01234567      /* Some fixed size data for the bootloaders. */
>
> ?

Yeah, you are right. Would you like me to repost whole patch series or
could you fix it before committing?

Daniel

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