From 85d3ccc8b75bb5a443edb3c42fa22e97da2e60ec Mon Sep 17 00:00:00 2001 From: Oliver Upton Date: Mon, 22 Apr 2024 20:01:44 +0000 Subject: KVM: arm64: vgic-debug: Use an xarray mark for debug iterator The vgic debug iterator is the final user of vgic_copy_lpi_list(), but is a bit more complicated to transition to something else. Use a mark in the LPI xarray to record the indices 'known' to the debug iterator. Protect against the LPIs from being freed by associating an additional reference with the xarray mark. Rework iter_next() to let the xarray walk 'drive' the iteration after visiting all of the SGIs, PPIs, and SPIs. Signed-off-by: Oliver Upton Link: https://lore.kernel.org/r/20240422200158.2606761-6-oliver.upton@linux.dev Signed-off-by: Marc Zyngier --- include/kvm/arm_vgic.h | 2 ++ 1 file changed, 2 insertions(+) (limited to 'include/kvm') diff --git a/include/kvm/arm_vgic.h b/include/kvm/arm_vgic.h index 47035946648e..8eb72721dac1 100644 --- a/include/kvm/arm_vgic.h +++ b/include/kvm/arm_vgic.h @@ -276,6 +276,8 @@ struct vgic_dist { /* Protects the lpi_list. */ raw_spinlock_t lpi_list_lock; + +#define LPI_XA_MARK_DEBUG_ITER XA_MARK_0 struct xarray lpi_xa; atomic_t lpi_count; -- cgit v1.2.3