Skip to content
Commit 730ad0ed authored by Suravee Suthikulpanit's avatar Suravee Suthikulpanit Committed by Joerg Roedel
Browse files

iommu/amd: Fix IOMMU AVIC not properly update the is_run bit in IRTE



Commit b9c6ff94 ("iommu/amd: Re-factor guest virtual APIC
(de-)activation code") accidentally left out the ir_data pointer when
calling modity_irte_ga(), which causes the function amd_iommu_update_ga()
to return prematurely due to struct amd_ir_data.ref is NULL and
the "is_run" bit of IRTE does not get updated properly.

This results in bad I/O performance since IOMMU AVIC always generate GA Log
entry and notify IOMMU driver and KVM when it receives interrupt from the
PCI pass-through device instead of directly inject interrupt to the vCPU.

Fixes by passing ir_data when calling modify_irte_ga() as done previously.

Fixes: b9c6ff94 ("iommu/amd: Re-factor guest virtual APIC (de-)activation code")
Signed-off-by: default avatarSuravee Suthikulpanit <suravee.suthikulpanit@amd.com>
Signed-off-by: default avatarJoerg Roedel <jroedel@suse.de>
parent da72a379
0% or .
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment