From: Baoquan He <bhe@redhat.com>
To: joro@8bytes.org
Cc: iommu@lists.linux-foundation.org, vincent.wan@amd.com,
xlpang@redhat.com, dyoung@redhat.com,
linux-kernel@vger.kernel.org, Baoquan HE <bhe@redhat.com>,
Baoquan He <bhe@redhat.com>
Subject: [Patch v4 8/9] iommu/amd: Do not initialize dev tables again in kdump
Date: Wed, 25 May 2016 14:28:54 +0800 [thread overview]
Message-ID: <1464157735-8865-9-git-send-email-bhe@redhat.com> (raw)
In-Reply-To: <1464157735-8865-1-git-send-email-bhe@redhat.com>
From: Baoquan HE <bhe@dhcp-129-10.nay.redhat.com>
The init should have been done in normal kernel, skip it in kdump
kernel. And clean up the function comments.
Signed-off-by: Baoquan He <bhe@redhat.com>
---
drivers/iommu/amd_iommu_init.c | 9 ++++++---
1 file changed, 6 insertions(+), 3 deletions(-)
diff --git a/drivers/iommu/amd_iommu_init.c b/drivers/iommu/amd_iommu_init.c
index 66a1fa5..47e5972 100644
--- a/drivers/iommu/amd_iommu_init.c
+++ b/drivers/iommu/amd_iommu_init.c
@@ -1432,7 +1432,11 @@ static int __init amd_iommu_init_pci(void)
break;
}
- init_device_table_dma();
+ for_each_iommu(iommu) {
+ if ( !translation_pre_enabled(iommu) )
+ init_device_table_dma();
+ break;
+ }
for_each_iommu(iommu)
iommu_flush_all_caches(iommu);
@@ -1612,8 +1616,7 @@ static int __init init_memory_definitions(struct acpi_table_header *table)
}
/*
- * Init the device table to not allow DMA access for devices and
- * suppress all page faults
+ * Init the device table to not allow DMA access for devices.
*/
static void init_device_table_dma(void)
{
--
2.5.5
next prev parent reply other threads:[~2016-05-25 6:29 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-05-25 6:28 [Patch v4 0/9] *** Fix kdump failure in system with amd iommu*** Baoquan He
2016-05-25 6:28 ` [Patch v4 1/9] iommu/amd: clean up the cmpxchg64 invocation Baoquan He
2016-05-25 6:28 ` [Patch v4 2/9] iommu/amd: Use standard bitmap operation to set bitmap Baoquan He
2016-05-25 6:28 ` [Patch v4 3/9] iommu/amd: Detect pre enabled translation Baoquan He
2016-05-28 12:49 ` Wan Zongshun
2016-05-30 3:24 ` Baoquan He
2016-05-30 3:27 ` Baoquan He
2016-05-25 6:28 ` [Patch v4 4/9] iommu/amd: add early_enable_iommu() helper function Baoquan He
2016-05-25 6:28 ` [Patch v4 5/9] iommu/amd: Define bit fields for DTE particularly Baoquan He
2016-05-25 6:28 ` [Patch v4 6/9] iommu/amd: Add function copy_dev_tables Baoquan He
2016-05-28 13:08 ` Wan Zongshun
2016-05-30 3:32 ` Baoquan He
2016-05-25 6:28 ` [Patch v4 7/9] iommu/amd: copy old trans table from old kernel Baoquan He
2016-05-28 13:25 ` Wan Zongshun
2016-05-25 6:28 ` Baoquan He [this message]
2016-05-25 6:28 ` [Patch v4 9/9] iommu/amd: Check the validation of irq table and domain id Baoquan He
2016-05-28 13:30 ` Wan Zongshun
2016-05-30 5:10 ` Baoquan He
2016-05-25 7:02 ` [Patch v4 0/9] *** Fix kdump failure in system with amd iommu*** Baoquan He
2016-05-25 7:15 ` Baoquan He
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