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| author | Oliver Upton <oliver.upton@linux.dev> | 2024-02-21 08:42:44 +0300 |
|---|---|---|
| committer | Oliver Upton <oliver.upton@linux.dev> | 2024-02-24 00:46:01 +0300 |
| commit | 1d6f83f60f79ff0118823d904dc1f04ba89f9428 (patch) | |
| tree | fbdc3db196a8eee199653b7247070d651e319056 /include/kvm | |
| parent | 6613476e225e090cc9aad49be7fa504e290dd33d (diff) | |
| download | linux-1d6f83f60f79ff0118823d904dc1f04ba89f9428.tar.xz | |
KVM: arm64: vgic: Store LPIs in an xarray
Using a linked-list for LPIs is less than ideal as it of course requires
iterative searches to find a particular entry. An xarray is a better
data structure for this use case, as it provides faster searches and can
still handle a potentially sparse range of INTID allocations.
Start by storing LPIs in an xarray, punting usage of the xarray to a
subsequent change. The observant among you will notice that we added yet
another lock to the chain of locking order rules; document the ordering
of the xa_lock. Don't worry, we'll get rid of the lpi_list_lock one
day...
Reviewed-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20240221054253.3848076-2-oliver.upton@linux.dev
Signed-off-by: Oliver Upton <oliver.upton@linux.dev>
Diffstat (limited to 'include/kvm')
| -rw-r--r-- | include/kvm/arm_vgic.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/include/kvm/arm_vgic.h b/include/kvm/arm_vgic.h index 8cc38e836f54..795b35656b54 100644 --- a/include/kvm/arm_vgic.h +++ b/include/kvm/arm_vgic.h @@ -13,6 +13,7 @@ #include <linux/spinlock.h> #include <linux/static_key.h> #include <linux/types.h> +#include <linux/xarray.h> #include <kvm/iodev.h> #include <linux/list.h> #include <linux/jump_label.h> @@ -275,6 +276,7 @@ struct vgic_dist { /* Protects the lpi_list and the count value below. */ raw_spinlock_t lpi_list_lock; + struct xarray lpi_xa; struct list_head lpi_list_head; int lpi_list_count; |