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| author | Kunkun Jiang <jiangkunkun@huawei.com> | 2024-12-04 12:23:17 -0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2024-12-14 19:48:33 +0100 |
| commit | c329033f1b722f5288f60b3fdb23fb5c9faa401e (patch) | |
| tree | 188111b6fe5a2c071ff807f5639686e0820ba954 /drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c | |
| parent | f4dbf393bfb42164d4e7e97e1dd3751ec699e2c8 (diff) | |
KVM: arm64: vgic-its: Clear DTE when MAPD unmaps a device
commit e9649129d33dca561305fc590a7c4ba8c3e5675a upstream.
vgic_its_save_device_tables will traverse its->device_list to
save DTE for each device. vgic_its_restore_device_tables will
traverse each entry of device table and check if it is valid.
Restore if valid.
But when MAPD unmaps a device, it does not invalidate the
corresponding DTE. In the scenario of continuous saves
and restores, there may be a situation where a device's DTE
is not saved but is restored. This is unreasonable and may
cause restore to fail. This patch clears the corresponding
DTE when MAPD unmaps a device.
Cc: stable@vger.kernel.org
Fixes: 57a9a117154c ("KVM: arm64: vgic-its: Device table save/restore")
Co-developed-by: Shusen Li <lishusen2@huawei.com>
Signed-off-by: Shusen Li <lishusen2@huawei.com>
Signed-off-by: Kunkun Jiang <jiangkunkun@huawei.com>
[Jing: Update with entry write helper]
Signed-off-by: Jing Zhang <jingzhangos@google.com>
Link: https://lore.kernel.org/r/20241107214137.428439-5-jingzhangos@google.com
Signed-off-by: Oliver Upton <oliver.upton@linux.dev>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c')
0 files changed, 0 insertions, 0 deletions