[PATCH v5 8/8] loongarch: efi: enable generic EFI compressed boot

[陈华才]

Hi, Ard,


> -----原始邮件-----
> 发件人: "Ard Biesheuvel" <ardb at kernel.org>
> 发送时间:2022-09-12 18:18:05 (星期一)
> 收件人: "陈华才" <chenhuacai at loongson.cn>
> 抄送: linux-efi at vger.kernel.org, linux-arm-kernel at lists.infradead.org, linux-kernel at vger.kernel.org, "James E.J. Bottomley" <James.Bottomley at hansenpartnership.com>, "Matthew Garrett" <mjg59 at srcf.ucam.org>, "Peter Jones" <pjones at redhat.com>, "Ilias Apalodimas" <ilias.apalodimas at linaro.org>, "Heinrich Schuchardt" <heinrich.schuchardt at canonical.com>, "AKASHI Takahiro" <takahiro.akashi at linaro.org>, "Palmer Dabbelt" <palmer at dabbelt.com>, "Atish Patra" <atishp at atishpatra.org>, "Arnd Bergmann" <arnd at arndb.de>, "Xi Ruoyao" <xry111 at xry111.site>, "Lennart Poettering" <lennart at poettering.net>, "Jeremy Linton" <jeremy.linton at arm.com>, "Will Deacon" <will at kernel.org>, "Catalin Marinas" <catalin.marinas at arm.com>
> 主题: Re: Re: [PATCH v5 8/8] loongarch: efi: enable generic EFI compressed boot
> 
> On Sun, 11 Sept 2022 at 16:03, 陈华才 <chenhuacai at loongson.cn> wrote:
> >
> >
> >
> >
> > > -----原始邮件-----
> > > 发件人: "Ard Biesheuvel" <ardb at kernel.org>
> > > 发送时间:2022-09-10 22:28:04 (星期六)
> > > 收件人: "陈华才" <chenhuacai at loongson.cn>
> > > 抄送: linux-efi at vger.kernel.org, linux-arm-kernel at lists.infradead.org, linux-kernel at vger.kernel.org, "James E.J. Bottomley" <James.Bottomley at hansenpartnership.com>, "Matthew Garrett" <mjg59 at srcf.ucam.org>, "Peter Jones" <pjones at redhat.com>, "Ilias Apalodimas" <ilias.apalodimas at linaro.org>, "Heinrich Schuchardt" <heinrich.schuchardt at canonical.com>, "AKASHI Takahiro" <takahiro.akashi at linaro.org>, "Palmer Dabbelt" <palmer at dabbelt.com>, "Atish Patra" <atishp at atishpatra.org>, "Arnd Bergmann" <arnd at arndb.de>, "Xi Ruoyao" <xry111 at xry111.site>, "Lennart Poettering" <lennart at poettering.net>, "Jeremy Linton" <jeremy.linton at arm.com>, "Will Deacon" <will at kernel.org>, "Catalin Marinas" <catalin.marinas at arm.com>
> > > 主题: Re: [PATCH v5 8/8] loongarch: efi: enable generic EFI compressed boot
> > >
> > > On Sat, 10 Sept 2022 at 15:22, 陈华才 <chenhuacai at loongson.cn> wrote:
> > > >
> > > > Hi, Ard,
> > > >
> > > > I prefer to give a chance to disable ZBOOT, so I don't want to select EFI_ZBOOT unconditionally in Kconfig, and then the Makefile can be like this:
> > > > diff --git a/arch/loongarch/Makefile b/arch/loongarch/Makefile
> > > > index c3f579bdf9e5..bc6fe65125f5 100644
> > > > --- a/arch/loongarch/Makefile
> > > > +++ b/arch/loongarch/Makefile
> > > > @@ -14,6 +14,10 @@ else
> > > >  KBUILD_IMAGE   := $(boot)/vmlinux.efi
> > > >  endif
> > > >
> > > > +ifdef CONFIG_EFI_ZBOOT
> > > > +KBUILD_IMAGE    := $(boot)/vmlinuz.efi
> > > > +endif
> > > > +
> > > >  archscripts: scripts_basic
> > > >         $(Q)$(MAKE) $(build)=arch/loongarch/boot/tools relocs
> > > >
> > >
> > > OK, I will fold this in. This actually aligns it with the other
> > > architectures, so I prefer this approach as well.
> >
> > Thank you, and if "make install" can also handle the zboot case, that's even better. :)
> >
> > diff --git a/arch/loongarch/Makefile b/arch/loongarch/Makefile
> > index c3f579bdf9e5..5480fe2de7cd 100644
> > --- a/arch/loongarch/Makefile
> > +++ b/arch/loongarch/Makefile
> > @@ -137,7 +137,11 @@ vmlinux.elf vmlinux.efi vmlinuz.efi: vmlinux
> >  core-y += arch/loongarch/boot/dts/
> >
> >  install:
> > +ifndef CONFIG_EFI_ZBOOT
> >         $(Q)install -D -m 755 $(KBUILD_IMAGE) $(INSTALL_PATH)/vmlinux-$(KERNELRELEASE)
> > +else
> > +       $(Q)install -D -m 755 $(KBUILD_IMAGE) $(INSTALL_PATH)/vmlinuz-$(KERNELRELEASE)
> > +endif
> >         $(Q)install -D -m 644 .config $(INSTALL_PATH)/config-$(KERNELRELEASE)
> >         $(Q)install -D -m 644 System.map $(INSTALL_PATH)/System.map-$(KERNELRELEASE)
> >
> 
> Is there any reason in particular this is open coded like this? Other
> architectures just do something like
> 
> install:
>     $(call cmd,install)
> 
> and be done with it.
It seems that there are two problems:
1, the default install script doesn't install the configuration file;
2, the kernel name in "installkernel" isn't the same as the open coded version, it looks like this:
if [ $ARCH = 'ppc64' -o $ARCH = 'ppc' ]; then
    KERNEL_NAME=vmlinux
else
    KERNEL_NAME=vmlinuz
fi

Maybe we can provide an arch-specific install.sh as arm64 does, but it is even more complex than the open coded version.

Huacai



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