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| author |   Oliver Upton <oliver.upton@linux.dev> | 2025-02-26 10:31:23 -0800 |
|---|---|---|
| committer | Oliver Upton <oliver.upton@linux.dev> | 2025-02-26 13:22:49 -0800 |
| commit | 5c57533eb8c1efeeab4e2e417fa983d65707b925 (patch) | |
| tree | 741e27b722c7e59b6aeb0ca2c1a692e4767c4234 /scripts/lib/kdoc/kdoc_output.py | |
| parent | KVM: arm64: vgic-v4: Only WARN for HW IRQ mismatch when unmapping vLPI (diff) | |
| download | linux-rng-5c57533eb8c1efeeab4e2e417fa983d65707b925.tar.xz linux-rng-5c57533eb8c1efeeab4e2e417fa983d65707b925.zip | |
KVM: arm64: vgic-v4: Fall back to software irqbypass if LPI not found
Continuing with the theme of broken VMMs and guests, irqbypass
registration can fail if the virtual ITS lacks a translation for the
MSI. Either the guest hasn't mapped it or userspace may have forgotten
to restore the ITS.
Exit silently and allow irqbypass configuration to succeed. As a reward
for ingenuity, LPIs are demoted to software injection.
Tested-by: Sudheer Dantuluri <dantuluris@google.com>
Fixes: 196b136498b3 ("KVM: arm/arm64: GICv4: Wire mapping/unmapping of VLPIs in VFIO irq bypass")
Acked-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20250226183124.82094-4-oliver.upton@linux.dev
Signed-off-by: Oliver Upton <oliver.upton@linux.dev>
Diffstat (limited to 'scripts/lib/kdoc/kdoc_output.py')
0 files changed, 0 insertions, 0 deletions