kernel/linux
0
Fork 0
mirror of https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ synced 2026-11-10 20:48:12 +00:00
Code Issues Releases Packages Activity

KVM: arm64: Turn vgic-v3 errata traps into a patched-in constant

Browse source 
The trap bits are currently only set to manage CPU errata. However,
we are about to make use of them for purposes beyond beating broken
CPUs into submission.

For this purpose, turn these errata-driven bits into a patched-in
constant that is merged with the KVM-driven value at the point of
programming the ICH_HCR_EL2 register, rather than being directly
stored with with the shadow value..

This allows the KVM code to distinguish between a trap being handled
for the purpose of an erratum workaround, or for KVM's own need.

Tested-by: Fuad Tabba <tabba@google.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Tested-by: Mark Brown <broonie@kernel.org>
Link: https://msgid.link/20251120172540.2267180-5-maz@kernel.org
Signed-off-by: Oliver Upton <oupton@kernel.org>
This commit is contained in:
Marc Zyngier 2025-11-20 17:24:54 +00:00 • committed by Oliver Upton
commit 8d3dfab1d3
5 changed files with 84 additions and 49 deletions
Download patch file Download diff file Expand all files Collapse all files