Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]

Groups > linux.kernel > #1231889

[PATCH 08/10] iommu/amd: Do not update the information of domain to devtables before device driver init

Show all headers | View raw

update_domain() is the only place where domain->pt_root will be got and
set into dev entry. So before the device driver initialization we do
nothing if it's in previously enabled translation status.

Signed-off-by: Baoquan He <bhe@redhat.com>
---
 drivers/iommu/amd_iommu.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/iommu/amd_iommu.c b/drivers/iommu/amd_iommu.c
index 0d59f79..aee1ae4 100644
--- a/drivers/iommu/amd_iommu.c
+++ b/drivers/iommu/amd_iommu.c
@@ -2350,7 +2350,7 @@ static void update_device_table(struct protection_domain *domain)
 
 static void update_domain(struct protection_domain *domain)
 {
-	if (!domain->updated)
+	if (!domain->updated || translation_pre_enabled())
 		return;
 
 	update_device_table(domain);
-- 
2.4.0

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/

Back to linux.kernel | Previous | Next — Previous in thread | Next in thread | Find similar | Unroll thread

Thread

[PATCH 00/10] Fix AMD IOMMU faults in kdump kernel Baoquan He <bhe@redhat.com> - 2015-09-24 08:40 +0200
  [PATCH 04/10] iommu/amd: Detect pre enabled translation Baoquan He <bhe@redhat.com> - 2015-09-24 08:40 +0200
  [PATCH 09/10] iommu/amd: Clear the iommu pre enabled setting Baoquan He <bhe@redhat.com> - 2015-09-24 08:40 +0200
    Re: [PATCH 09/10] iommu/amd: Clear the iommu pre enabled setting Joerg Roedel <joro@8bytes.org> - 2015-09-29 18:20 +0200
  [PATCH 08/10] iommu/amd: Do not update the information of domain to devtables before device driver init Baoquan He <bhe@redhat.com> - 2015-09-24 08:40 +0200
  [PATCH 05/10] iommu/amd: Add function copy_dev_tables Baoquan He <bhe@redhat.com> - 2015-09-24 08:50 +0200
  [PATCH 02/10] iommu/amd: Adjust functons which get first/last devid by reading pci config Baoquan He <bhe@redhat.com> - 2015-09-24 08:50 +0200
  [PATCH 03/10] iommu/amd: Get the first/last device of iommu earlier Baoquan He <bhe@redhat.com> - 2015-09-24 08:50 +0200

csiph-web