[PATCH 0/4] KVM: arm64: vgic: Locking fixes

[Marc Zyngier]

On Thu, 18 May 2023 11:09:14 +0100, Jean-Philippe Brucker wrote:
> Another fun locking puzzle, between the new config_lock and srcu.
> Patch 1 attempts to fix it, and the other patches fix simpler issues.
> 
> I got these lockdep reports while running KVM QEMU on a TCG QEMU, but it
> can also be triggered by running the vgic_irq kselftest on TCG QEMU.
> Now, with the fix and lockdep enabled, vgic_irq hangs but I believe it's
> an unrelated weirdness: if I introduce a separate lockdep warning for
> some made up locks, then the test passes again. So I'm sending this out
> now for discussion, and will investigate that one later.
> 
> [...]

Applied to fixes, thanks!

[1/4] KVM: arm64: vgic: Fix a circular locking issue
      commit: 59112e9c390be595224e427827475a6cd3726021
[2/4] KVM: arm64: vgic: Wrap vgic_its_create() with config_lock
      commit: 9cf2f840c439b6b23bd99f584f2917ca425ae406
[3/4] KVM: arm64: vgic: Fix locking comment
      commit: c38b8400aef99d63be2b1ff131bb993465dcafe1
[4/4] KVM: arm64: vgic: Fix a comment
      commit: 62548732260976ca88fcb17ef98ab661e7ce7504

Cheers,

	M.
-- 
Without deviation from the norm, progress is not possible.