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KVM: arm64: vgic-v3: Iterate the xarray to find pending LPIs

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Start walking the LPI xarray to find pending LPIs in preparation for
the removal of the LPI linked-list. Note that the 'basic' iterator
is chosen here as each iteration needs to drop the xarray read lock
(RCU) as reads/writes to guest memory can potentially block.

Reviewed-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20240221054253.3848076-4-oliver.upton@linux.dev
Signed-off-by: Oliver Upton <oliver.upton@linux.dev>
This commit is contained in:
Oliver Upton 2024-02-21 05:42:46 +00:00
parent 5a021df719
commit 49f0a468a1
1 changed files with 2 additions and 1 deletions
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3
arch/arm64/kvm/vgic/vgic-v3.c
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@ -380,6 +380,7 @@ int vgic_v3_save_pending_tables(struct kvm *kvm)
struct vgic_irq *irq;
gpa_t last_ptr = ~(gpa_t)0;
bool vlpi_avail = false;
unsigned long index;
int ret = 0;
u8 val;
@ -396,7 +397,7 @@ int vgic_v3_save_pending_tables(struct kvm *kvm)
vlpi_avail = true;
}
list_for_each_entry(irq, &dist->lpi_list_head, lpi_list) {
xa_for_each(&dist->lpi_xa, index, irq) {
int byte_offset, bit_nr;
struct kvm_vcpu *vcpu;
gpa_t pendbase, ptr;