linux-kernel - Re: [PATCH 0/6] trivial cleanup for iommu/vt-d

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Date:	Fri, 4 Jul 2014 11:22:09 +0200
From:	Joerg Roedel <joro@...tes.org>
To:	Yijing Wang <wangyijing@...wei.com>
Cc:	David Woodhouse <dwmw2@...radead.org>,
	iommu@...ts.linux-foundation.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 0/6] trivial cleanup for iommu/vt-d

On Tue, May 20, 2014 at 08:37:46PM +0800, Yijing Wang wrote:
> 
> Yijing Wang (6):
>   iommu/vt-d: Use list_for_each_safe() to simplify code
>   iommu/vt-d: move up no_iommu and dmar_disabled check
>   iommu/vt-d: clear the redundant assignment in dmar_enable_qi
>   iommu/vt-d: clear the redundant assignment for domain->nid
>   iommu/vt-d: use inline function dma_pte_superpage instead of macros
>   iommu/vt-d: fix reference count in iommu_prepare_isa

Applied patches 1, 3, 4, 5 and 6, thanks. Also added another patch
on-top, see below.

>From 77c704bebc5d023ece7af32ea18bc3508cdb0007 Mon Sep 17 00:00:00 2001
From: Joerg Roedel <jroedel@...e.de>
Date: Fri, 4 Jul 2014 11:19:10 +0200
Subject: [PATCH] iommu/vt-d: Don't use magic number in dma_pte_superpage

Use the already defined DMA_PTE_LARGE_PAGE for testing
instead of hardcoding the value again.

Signed-off-by: Joerg Roedel <jroedel@...e.de>
---
 drivers/iommu/intel-iommu.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/iommu/intel-iommu.c b/drivers/iommu/intel-iommu.c
index 9b9f28e..5d86e93 100644
--- a/drivers/iommu/intel-iommu.c
+++ b/drivers/iommu/intel-iommu.c
@@ -304,7 +304,7 @@ static inline bool dma_pte_present(struct dma_pte *pte)
 
 static inline bool dma_pte_superpage(struct dma_pte *pte)
 {
-	return (pte->val & (1 << 7));
+	return (pte->val & DMA_PTE_LARGE_PAGE);
 }
 
 static inline int first_pte_in_page(struct dma_pte *pte)
-- 
1.8.4.5


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