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Date: Mon, 21 Jan 2008 20:24:37 +0300 From: Cyrill Gorcunov <gorcunov@...il.com> To: Yinghai Lu <Yinghai.Lu@....COM> Cc: Andi Kleen <ak@...e.de>, Ingo Molnar <mingo@...e.hu>, "H. Peter Anvin" <hpa@...or.com>, LKML <linux-kernel@...r.kernel.org>, Jesse Barnes <jesse.barnes@...el.com>, Andrew Morton <akpm@...ux-foundation.org> Subject: Re: [PATCH] x86_64: check if Tom2 is enabled [Yinghai Lu - Sun, Jan 20, 2008 at 10:57:46PM -0800] | [PATCH] x86_64: check if Tom2 is enabled | | need to applied after andi's amd special tom2 wb check patch | | in amd_special_default_mtrr need to check if TOM2 is enabled | | Signed-off-by: Yinghai Lu <yinghai.lu@....com> | | diff --git a/arch/x86/kernel/cpu/mtrr/main.c b/arch/x86/kernel/cpu/mtrr/main.c | index 289ba1a..26eed57 100644 | --- a/arch/x86/kernel/cpu/mtrr/main.c | +++ b/arch/x86/kernel/cpu/mtrr/main.c | @@ -641,6 +641,7 @@ early_param("disable_mtrr_trim", disable_mtrr_trim_setup); | * Note this won't check if the MTRRs < 4GB where the magic bit doesn't | * apply to are wrong, but so far we don't know of any such case in the wild. | */ | +#define Tom2Enabled (1U << 21) | #define Tom2ForceMemTypeWB (1U << 22) | | static __init int amd_special_default_mtrr(void) | @@ -661,7 +662,8 @@ static __init int amd_special_default_mtrr(void) | * Memory between 4GB and top of mem is forced WB by this magic bit. | * Reserved before K8RevF, but should be zero there. | */ | - if (l & Tom2ForceMemTypeWB) | + if ((l & (Tom2Enabled | Tom2ForceMemTypeWB)) == | + (Tom2Enabled | Tom2ForceMemTypeWB)) | return 1; | return 0; | } is it possible to change 'l' and 'h' to 'low' and 'high'? 'cause 'l' does look like '1' (one) number... - Cyrill - -- 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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