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Date: Thu, 14 Nov 2013 09:53:46 +0800 From: Dave Young <dyoung@...hat.com> To: Matt Fleming <matt@...sole-pimps.org> Cc: linux-kernel@...r.kernel.org, linux-efi@...r.kernel.org, x86@...nel.org, mjg59@...f.ucam.org, hpa@...or.com, James.Bottomley@...senPartnership.com, vgoyal@...hat.com, ebiederm@...ssion.com, horms@...ge.net.au, kexec@...ts.infradead.org, bp@...en8.de Subject: Re: [patch 7/7 v2] x86: add xloadflags bit for efi runtime support on kexec On 11/13/13 at 03:50pm, Matt Fleming wrote: > On Tue, 05 Nov, at 04:20:14PM, dyoung@...hat.com wrote: > > Old kexec-tools can not load new kernel. The reason is previously kexec-tools > > do not fill efi_info in x86 setup header thus efi init fail and switch > > to noefi boot. In new kexec-tools it will by default fill efi_info and > > pass other efi required infomation to 2nd kernel so kexec kernel efi > > initialization will success finally. > > > > To prevent from breaking userspace, add a new xloadflags bit so kexec-tools > > will check the flag and switch to old logic. > > > > Signed-off-by: Dave Young <dyoung@...hat.com> > > --- > > arch/x86/boot/header.S | 9 ++++++++- > > arch/x86/include/uapi/asm/bootparam.h | 1 + > > 2 files changed, 9 insertions(+), 1 deletion(-) > > > > --- linux-2.6.orig/arch/x86/boot/header.S > > +++ linux-2.6/arch/x86/boot/header.S > > @@ -391,7 +391,14 @@ xloadflags: > > #else > > # define XLF23 0 > > #endif > > - .word XLF0 | XLF1 | XLF23 > > + > > +#if defined(CONFIG_X86_64) && defined(CONFIG_EFI) > > && defined(CONFIG_KEXEC) ? Will add above. > > > +# define XLF4 XLF_EFI_KEXEC > > +#else > > +# define XLF4 0 > > +#endif > > + > > -- > Matt Fleming, Intel Open Source Technology Center -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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