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authorSuravee Suthikulpanit <suravee.suthikulpanit@amd.com>2020-03-12 05:18:39 -0500
committerJoerg Roedel <jroedel@suse.de>2020-03-14 09:39:11 +0100
commit730ad0ede130015a773229573559e97ba0943065 (patch)
tree0ed7aac1335bb87fce1e1efe4f478c6c5ef492e6 /drivers/iommu/intel-iommu-debugfs.c
parentda72a379b2ec0bad3eb265787f7008bead0b040c (diff)
iommu/amd: Fix IOMMU AVIC not properly update the is_run bit in IRTE
Commit b9c6ff94e43a ("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: b9c6ff94e43a ("iommu/amd: Re-factor guest virtual APIC (de-)activation code") Signed-off-by: Suravee Suthikulpanit <suravee.suthikulpanit@amd.com> Signed-off-by: Joerg Roedel <jroedel@suse.de>
Diffstat (limited to 'drivers/iommu/intel-iommu-debugfs.c')
0 files changed, 0 insertions, 0 deletions