Re: [Xen-devel] [PATCH v5 01/22] arm/acpi: Estimate memory required for acpi/efi tables

[Shannon Zhao <shannon.zhao@xxxxxxxxxx>]

On 2016/3/4 23:23, Stefano Stabellini wrote:
> On Fri, 4 Mar 2016, Shannon Zhao wrote:
> > >On 2016年03月04日 18:55, Stefano Stabellini wrote:
> > > > >On Fri, 4 Mar 2016, Jan Beulich wrote:
> > > > > > > > > > > > >>>>> > >>>On 04.03.16 at 07:15,<zhaoshenglong@xxxxxxxxxx>  wrote:
> > > > > > > > >>> > >From: Shannon Zhao<shannon.zhao@xxxxxxxxxx>
> > > > > > > > >>> > >
> > > > > > > > >>> > >Estimate the memory required for loading acpi/efi tables in Dom0. Make
> > > > > > > > >>> > >the length of each table aligned with 64bit. Alloc the pages to store
> > > > > > > > >>> > >the new created EFI and ACPI tables and free these pages when
> > > > > > > > >>> > >destroying domain.
> > > > > > > > >>> > >
> > > > > > > > >>> > >Cc: Jan Beulich<jbeulich@xxxxxxxx>
> > > > > > > > >>> > >Signed-off-by: Parth Dixit<parth.dixit@xxxxxxxxxx>
> > > > > > > > >>> > >Signed-off-by: Shannon Zhao<shannon.zhao@xxxxxxxxxx>
> > > > > > >> >
> > > > > > >> >Since the pattern repeats I finally have to ask: Who is the author
> > > > > > >> >of a patch with such a set of tag? You (From:) or Parth (first S-o-b)?
> > > > > > >> >
> > > > > > > > >>> > >--- a/xen/common/efi/boot.c
> > > > > > > > >>> > >+++ b/xen/common/efi/boot.c
> > > > > > > > >>> > >@@ -1151,6 +1151,13 @@ efi_start(EFI_HANDLE ImageHandle, 
> > > > > > > EFI_SYSTEM_TABLE *SystemTable)
> > > > > > > > >>> > >      for( ; ; ); /* not reached */
> > > > > > > > >>> > >  }
> > > > > > > > >>> > >
> > > > > > > > >>> > >+#if defined (CONFIG_ACPI) && defined (CONFIG_ARM)
> > > > > > > > >>> > >+struct meminfo __init *get_acpi_meminfo(void)
> > > > > > > > >>> > >+{
> > > > > > > > >>> > >+    return &acpi_mem;
> > > > > > > > >>> > >+}
> > > > > > > > >>> > >+#endif
> > > > > > >> >
> > > > > > >> >No such hackery in common code please, if at all avoidable. If ARM
> > > > > > >> >maintainers are fine with this in their code, it could be put into
> > > > > > >> >ARM's efi-boot.h.
> > > > >I am OK with that. If you move it under arch/arm, then drop the ifdef
> > > > >CONFIG_ARM.
> > > > >
> > >While I want to include efi-boot.h in efi-dom.c firstly, but there are
> > >many defined-but-not-used errors because there are some of functions in
> > >efi-boot.h which are not used in efi-dom0.c.
> > >So how could we solve such a problem?
> It is probably not a good idea to include efi-boot.h in efi-dom.c. Why
> are you trying to do that?
Use acpi_mem which is defined in efi-boot.h. Maybe as Jan suggested I 
should add a new header under asm-arm to extern acpi_mem then include 
this new header to efi-dom0.c. How about this?
Thanks,
--
Shannon

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