diff options
| author | Marc Zyngier <maz@kernel.org> | 2019-11-07 16:04:11 +0000 |
|---|---|---|
| committer | Marc Zyngier <maz@kernel.org> | 2019-11-08 11:13:24 +0000 |
| commit | 5bd90b0989731520f2cdcfbbe467f1271f3cc803 (patch) | |
| tree | f54a4b2b5212fa7916d6ecdf90c8eabf9ae9bff8 /include | |
| parent | 9090825fa99740f0c794f94b9cbd57ad79101228 (diff) | |
| download | linux-5bd90b0989731520f2cdcfbbe467f1271f3cc803.tar.bz2 | |
KVM: vgic-v4: Track the number of VLPIs per vcpu
In order to find out whether a vcpu is likely to be the target of
VLPIs (and to further optimize the way we deal with those), let's
track the number of VLPIs a vcpu can receive.
This gets implemented with an atomic variable that gets incremented
or decremented on map, unmap and move of a VLPI.
Signed-off-by: Marc Zyngier <maz@kernel.org>
Reviewed-by: Zenghui Yu <yuzenghui@huawei.com>
Reviewed-by: Christoffer Dall <christoffer.dall@arm.com>
Link: https://lore.kernel.org/r/20191107160412.30301-2-maz@kernel.org
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/irqchip/arm-gic-v4.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/include/linux/irqchip/arm-gic-v4.h b/include/linux/irqchip/arm-gic-v4.h index ab1396afe08a..5dbcfc65f21e 100644 --- a/include/linux/irqchip/arm-gic-v4.h +++ b/include/linux/irqchip/arm-gic-v4.h @@ -32,6 +32,8 @@ struct its_vm { struct its_vpe { struct page *vpt_page; struct its_vm *its_vm; + /* per-vPE VLPI tracking */ + atomic_t vlpi_count; /* Doorbell interrupt */ int irq; irq_hw_number_t vpe_db_lpi; |