KVM: arm64: Add {flush,sync}_hyp_timer_state() primitives

A protected guest's virtual timer is programmed from EL2's own copy of
the state and read back there, so the host can't change the guest's
deadline. cntvoff_el2 is zeroed, so the guest's virtual time is the
physical time.

The flush also preserves the guest's CNTV and CNTP CVAL/CTL across the
host's full-context copy into the hyp vCPU, until the per-EC
marshalling patch removes that copy.

Co-developed-by: Fuad Tabba <fuad.tabba@linux.dev>
Signed-off-by: Fuad Tabba <fuad.tabba@linux.dev>
Link: https://patch.msgid.link/20261001135711.1640520-8-fuad.tabba@linux.dev
Signed-off-by: Marc Zyngier <maz@kernel.org>

0 files changed, 0 insertions, 0 deletions