linux-kernel - [PATCH 16/28] iommu/amd: Block all interrupts by default with irq-remapping enabled

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Date:	Thu, 5 Jul 2012 14:36:36 +0200
From:	Joerg Roedel <joerg.roedel@....com>
To:	<iommu@...ts.linux-foundation.org>
CC:	<linux-kernel@...r.kernel.org>, Joerg Roedel <joerg.roedel@....com>
Subject: [PATCH 16/28] iommu/amd: Block all interrupts by default with irq-remapping enabled

When IRQ remapping is enabled all interrupts must be blocked
by default to be secure. Single interrupts are enabled on
demand later.

Signed-off-by: Joerg Roedel <joerg.roedel@....com>
---
 drivers/iommu/amd_iommu_init.c |    3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/iommu/amd_iommu_init.c b/drivers/iommu/amd_iommu_init.c
index ed4e690..e663f1d 100644
--- a/drivers/iommu/amd_iommu_init.c
+++ b/drivers/iommu/amd_iommu_init.c
@@ -1390,6 +1390,9 @@ static void init_device_table(void)
 	for (devid = 0; devid <= amd_iommu_last_bdf; ++devid) {
 		set_dev_entry_bit(devid, DEV_ENTRY_VALID);
 		set_dev_entry_bit(devid, DEV_ENTRY_TRANSLATION);
+
+		if (amd_iommu_irq_remap)
+			set_dev_entry_bit(devid, DEV_ENTRY_IRQ_TBL_EN);
 	}
 }
 
-- 
1.7.9.5


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