Messages in this thread Patch in this message | | | From | Greg Kroah-Hartman <> | Subject | [PATCH 4.10 043/167] iommu/vt-d: Tylersburg isoch identity map check is done too late. | Date | Fri, 10 Mar 2017 10:08:06 +0100 |
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4.10-stable review patch. If anyone has any objections, please let me know.
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From: Ashok Raj <ashok.raj@intel.com>
commit 21e722c4c8377b5bc82ad058fed12165af739c1b upstream.
The check to set identity map for tylersburg is done too late. It needs to be done before the check for identity_map domain is done.
To: Joerg Roedel <joro@8bytes.org> To: David Woodhouse <dwmw2@infradead.org> Cc: iommu@lists.linux-foundation.org Cc: linux-kernel@vger.kernel.org Cc: Ashok Raj <ashok.raj@intel.com>
Fixes: 86080ccc22 ("iommu/vt-d: Allocate si_domain in init_dmars()") Signed-off-by: Ashok Raj <ashok.raj@intel.com> Reported-by: Yunhong Jiang <yunhong.jiang@intel.com> Signed-off-by: Joerg Roedel <jroedel@suse.de> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
--- drivers/iommu/intel-iommu.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-)
--- a/drivers/iommu/intel-iommu.c +++ b/drivers/iommu/intel-iommu.c @@ -3325,13 +3325,14 @@ static int __init init_dmars(void) iommu_identity_mapping |= IDENTMAP_GFX; #endif + check_tylersburg_isoch(); + if (iommu_identity_mapping) { ret = si_domain_init(hw_pass_through); if (ret) goto free_iommu; } - check_tylersburg_isoch(); /* * If we copied translations from a previous kernel in the kdump
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