linux-kernel - [PATCH 13/21] AMD IOMMU: add domain cleanup helper function

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Message-ID: <1228832178-13429-14-git-send-email-joerg.roedel@amd.com>
Date:	Tue, 9 Dec 2008 15:16:10 +0100
From:	Joerg Roedel <joerg.roedel@....com>
To:	avi@...hat.com, mingo@...hat.com, dwmw2@...radead.org,
	gregkh@...e.de, weidong.han@...el.com
CC:	iommu@...ts.linux-foundation.org, linux-kernel@...r.kernel.org,
	kvm@...r.kernel.org, Joerg Roedel <joerg.roedel@....com>
Subject: [PATCH 13/21] AMD IOMMU: add domain cleanup helper function

Impact: add a function to remove all devices from a domain

Signed-off-by: Joerg Roedel <joerg.roedel@....com>
---
 arch/x86/kernel/amd_iommu.c |   14 ++++++++++++++
 1 files changed, 14 insertions(+), 0 deletions(-)

diff --git a/arch/x86/kernel/amd_iommu.c b/arch/x86/kernel/amd_iommu.c
index 47158e3..26b929b 100644
--- a/arch/x86/kernel/amd_iommu.c
+++ b/arch/x86/kernel/amd_iommu.c
@@ -1510,3 +1510,17 @@ static void detach_device(struct protection_domain *domain, u16 devid)
 	__detach_device(domain, devid);
 	write_unlock_irqrestore(&amd_iommu_devtable_lock, flags);
 }
+
+static void cleanup_domain(struct protection_domain *domain)
+{
+	unsigned long flags;
+	u16 devid;
+
+	write_lock_irqsave(&amd_iommu_devtable_lock, flags);
+
+	for (devid = 0; devid <= amd_iommu_last_bdf; ++devid)
+		if (amd_iommu_pd_table[devid] == domain)
+			__detach_device(domain, devid);
+
+	write_unlock_irqrestore(&amd_iommu_devtable_lock, flags);
+}
-- 
1.5.6.4


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