linux-kernel - RE: [PATCH v4 09/11] x86/head64.c: Early update ucode in 64-bit

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Message-ID: <3E5A0FA7E9CA944F9D5414FEC6C71220471099EF@ORSMSX105.amr.corp.intel.com>
Date:	Fri, 21 Dec 2012 04:44:36 +0000
From:	"Yu, Fenghua" <fenghua.yu@...el.com>
To:	Yinghai Lu <yinghai@...nel.org>
CC:	H Peter Anvin <hpa@...or.com>, Ingo Molnar <mingo@...e.hu>,
	Thomas Gleixner <tglx@...utronix.de>,
	"Mallick, Asit K" <asit.k.mallick@...el.com>,
	Tigran Aivazian <tigran@...azian.fsnet.co.uk>,
	Andreas Herrmann <andreas.herrmann3@....com>,
	Borislav Petkov <borislav.petkov@....com>,
	linux-kernel <linux-kernel@...r.kernel.org>, x86 <x86@...nel.org>
Subject: RE: [PATCH v4 09/11] x86/head64.c: Early update ucode in 64-bit

> -----Original Message-----
> From: yhlu.kernel@...il.com [mailto:yhlu.kernel@...il.com] On Behalf Of
> Yinghai Lu
> Sent: Thursday, December 20, 2012 8:10 PM
> To: Yu, Fenghua
> Cc: H Peter Anvin; Ingo Molnar; Thomas Gleixner; Mallick, Asit K;
> Tigran Aivazian; Andreas Herrmann; Borislav Petkov; linux-kernel; x86
> Subject: Re: [PATCH v4 09/11] x86/head64.c: Early update ucode in 64-
> bit
> 
> On Thu, Dec 20, 2012 at 11:48 AM, Fenghua Yu <fenghua.yu@...el.com>
> wrote:
> > From: Fenghua Yu <fenghua.yu@...el.com>
> >
> > This updates ucode on BSP in 64-bit mode. Paging and virtual address
> are
> > working now.
> >
> > Signed-off-by: Fenghua Yu <fenghua.yu@...el.com>
> > ---
> >  arch/x86/kernel/head64.c | 6 ++++++
> >  1 file changed, 6 insertions(+)
> >
> > diff --git a/arch/x86/kernel/head64.c b/arch/x86/kernel/head64.c
> > index e1cb611..1ccbaf1 100644
> > --- a/arch/x86/kernel/head64.c
> > +++ b/arch/x86/kernel/head64.c
> > @@ -26,6 +26,7 @@
> >  #include <asm/kdebug.h>
> >  #include <asm/e820.h>
> >  #include <asm/bios_ebda.h>
> > +#include <asm/microcode.h>
> >
> >  /*
> >   * Manage page tables very early on.
> > @@ -179,6 +180,11 @@ void __init x86_64_start_kernel(char *
> real_mode_data)
> >         }
> >         load_idt((const struct desc_ptr *)&idt_descr);
> >
> > +       /*
> > +        * Load microcode early on BSP.
> > +        */
> > +       load_ucode_bsp(__va(real_mode_data));
> > +
> >         copy_bootdata(__va(real_mode_data));
> 
> can you make load_ucode_bsp take boot_param directly instead of
> real_mode_data. ?
> 
> could be
> 
> 
>         copy_bootdata(__va(real_mode_data));
> +
> +        /* Load microcode early on BSP. */
> +       load_ucode_bsp(&boot_params);
> +
> 
> because copy_bootdata, already copy boot_params...
> 
> Thanks
> 
> Yinghai

That's right. Will fix this.

Thanks.

-Fenghua
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