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From: Ard Biesheuvel <ardb@kernel.org>
Date: Tue, 20 Sep 2022 16:53:57 +0200
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Subject: Re: [PATCH 11/12] efi/loongarch: libstub: remove dependency on
 flattened DT
To: Huacai Chen <chenhuacai@kernel.org>
Cc: linux-efi <linux-efi@vger.kernel.org>, loongarch@lists.linux.dev, 
	"Russell King (Oracle)" <linux@armlinux.org.uk>, Arnd Bergmann <arnd@arndb.de>, 
	Ilias Apalodimas <ilias.apalodimas@linaro.org>, Huacai Chen <chenhuacai@loongson.cn>, 
	Xi Ruoyao <xry111@xry111.site>
Content-Type: text/plain; charset="UTF-8"

On Tue, 20 Sept 2022 at 15:12, Huacai Chen <chenhuacai@kernel.org> wrote:
>
> Hi, Ard,
>
> On Tue, Sep 20, 2022 at 4:04 PM Ard Biesheuvel <ardb@kernel.org> wrote:
> >
> > On Tue, 20 Sept 2022 at 03:45, Huacai Chen <chenhuacai@kernel.org> wrote:
> > >
> > > Hi, Ard,
> > >
> > ...
> > > I'm very sorry, after an offline discussion with my colleagues,
> > > non-EFI DT boot is still needed (very sadly, we want to drop non-EFI
> > > firmware but we can't do that). However, for non-EFI DT boot we will
> > > use the same parameter passing method (a0=efi boot flag, a1=cmdline,
> > > a2=systemtable), firmware will generate a simple systemtable only for
> > > DT. In this way all boot methods share the same logic, and also make
> > > kexec easy to implement.
> > >
> >
> > OK, that should work. So I suppose you create a EFI system table along
> > with EFI configuration tables for DT, SMBIOS, etc? In this case, I
> > suggest you omit the MEMMAP config table that I am adding here, so
> > that there is no ambiguity between the EFI provided memory map and the
> > one provided by DT.
> >
> > I think that should be a clean way to implement this.
> OK, thanks.
>
> I have merged efi-cleanups-for-v6.1-v2 to
> https://github.com/loongson/linux/commits/loongarch-next. It seems
> everything work well except kexec.
>

OK thanks for testing. I will send out a v2 today and merge the
changes into efi/next tomorrow.