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| author | Sean Christopherson <[email protected]> | 2025-03-19 02:20:59 +0000 |
|---|---|---|
| committer | Joerg Roedel <[email protected]> | 2025-03-20 08:03:56 +0000 |
| commit | 2454823e97a63d85a6b215905f71e5a06324eab7 (patch) | |
| tree | c5d8c253f06d9392bf2b112e39ed038404bcd23e /lib/net_utils.c | |
| parent | iommu/vt-d: Cleanup intel_context_flush_present() (diff) | |
| download | kernel-2454823e97a63d85a6b215905f71e5a06324eab7.tar.gz kernel-2454823e97a63d85a6b215905f71e5a06324eab7.zip | |
iommu/vt-d: Put IRTE back into posted MSI mode if vCPU posting is disabled
Add a helper to take care of reconfiguring an IRTE to deliver IRQs to the
host, i.e. not to a vCPU, and use the helper when an IRTE's vCPU affinity
is nullified, i.e. when KVM puts an IRTE back into "host" mode. Because
posted MSIs use an ephemeral IRTE, using modify_irte() puts the IRTE into
full remapped mode, i.e. unintentionally disables posted MSIs on the IRQ.
Fixes: ed1e48ea4370 ("iommu/vt-d: Enable posted mode for device MSIs")
Cc: [email protected]
Cc: Thomas Gleixner <[email protected]>
Cc: Jacob Pan <[email protected]>
Signed-off-by: Sean Christopherson <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Lu Baolu <[email protected]>
Signed-off-by: Joerg Roedel <[email protected]>
Diffstat (limited to 'lib/net_utils.c')
0 files changed, 0 insertions, 0 deletions