linux-kernel - Re: [PATCH] fill in missing pv_mmu_ops entries for PAGETABLE

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Date:	Sat, 19 Jan 2008 21:05:17 -0800
From:	Jeremy Fitzhardinge <jeremy@...p.org>
To:	Marcelo Tosatti <marcelo@...ck.org>
CC:	mingo@...e.hu, gcosta@...hat.com, ehabkost@...hat.com,
	glommer@...il.com, chrisw@...hat.com, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] fill in missing pv_mmu_ops entries for PAGETABLE_LEVELS
 >= 3

Marcelo Tosatti wrote:
> On Fri, Jan 18, 2008 at 03:20:15PM -0200, Glauber de Oliveira Costa wrote:
>   
>> Hi,
>>
>> This small series provides some more fixes towards the goal
>> to have the PARAVIRT selectable for x86_64. After that, just
>> some more small steps are needed.
>>
>> The first fix is not even specific for PARAVIRT, and it's actually
>> preventing the whole tree from booting.
>>
>>     
>
> And the following allows PARAVIRT kernels to boot on x86_64.
>
> -----
>
> Fill in missing pagetable manipulation entries in pv_mmu_ops 
> for PAGETABLE_LEVELS >= 3.
>
> Signed-off-by: Marcelo Tosatti <mtosatti@...hat.com>
>   

Looks good, thanks.

Acked-by: Jeremy Fitzhardinge <jeremy@...source.com>

>
> Index: linux-2.6-x86/arch/x86/kernel/paravirt.c
> ===================================================================
> --- linux-2.6-x86.orig/arch/x86/kernel/paravirt.c
> +++ linux-2.6-x86/arch/x86/kernel/paravirt.c
> @@ -396,16 +396,25 @@ struct pv_mmu_ops pv_mmu_ops = {
>  	.kmap_atomic_pte = kmap_atomic,
>  #endif
>  
> +#if PAGETABLE_LEVELS >= 3
>  #ifdef CONFIG_X86_PAE
>  	.set_pte_atomic = native_set_pte_atomic,
>  	.set_pte_present = native_set_pte_present,
> -	.set_pud = native_set_pud,
>  	.pte_clear = native_pte_clear,
>  	.pmd_clear = native_pmd_clear,
> -
> +#endif
> +	.set_pud = native_set_pud,
> +	.set_pgd = native_set_pgd,
> +	.pgd_clear = native_pgd_clear,
>  	.pmd_val = native_pmd_val,
>  	.make_pmd = native_make_pmd,
> +
> +#if PAGETABLE_LEVELS == 4
> +	.pud_val = native_pud_val,
> +	.make_pud = native_make_pud,
> +	.pud_clear = native_pud_clear,
>  #endif
> +#endif /* PAGETABLE_LEVELS >= 3 */
>  
>  	.pte_val = native_pte_val,
>  	.pgd_val = native_pgd_val,
>
>
>
> --
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