mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/
synced 2026-10-22 19:14:51 +00:00
2a359e0725
Now that we can handle faults triggered through VNCR_EL2, we need to map the corresponding page at EL2. But where, you'll ask? Since each CPU in the system can run a vcpu, we need a per-CPU mapping. For that, we carve a NR_CPUS range in the fixmap, giving us a per-CPU va at which to map the guest's VNCR's page. The mapping occurs both on vcpu load and on the back of a fault, both generating a request that will take care of the mapping. That mapping will also get dropped on vcpu put. Yes, this is a bit heavy handed, but it is simple. Eventually, we may want to have a per-VM, per-CPU mapping, which would avoid all the TLBI overhead. Reviewed-by: Oliver Upton <oliver.upton@linux.dev> Link: https://lore.kernel.org/r/20250514103501.2225951-11-maz@kernel.org Signed-off-by: Marc Zyngier <maz@kernel.org>
121 lines
3.2 KiB
121 lines
3.2 KiB