KVM: arm64: Introduce per-EC entry handlers for pKVM

Add an ESR_EL2.EC-indexed handler table, entry_hyp_vm_handlers[],
read from flush_hyp_vcpu() on re-entry when the previous exit was
a trap: sync_hyp_vcpu() records the exit reason in the hyp vCPU as
exit_code, and the trap's exception class comes from its ESR_EL2. Its
single generic handler stands in until the per-EC marshalling patch
replaces the table with protected-only ones.

Entry carries the host's requested PC updates to the hyp vCPU: add
vcpu_copy_flag() to copy a masked set of flags between the two vCPU
structures, with PC_UPDATE_REQ covering INCREMENT_PC and the
pending-exception flags. The wholesale iflags copy moves into the
non-protected branch; a protected vCPU takes only PC_UPDATE_REQ.

Reviewed-by: Joey Gouly <joey.gouly@arm.com>
Co-developed-by: Fuad Tabba <fuad.tabba@linux.dev>
Signed-off-by: Fuad Tabba <fuad.tabba@linux.dev>
Link: https://patch.msgid.link/20261001135711.1640520-6-fuad.tabba@linux.dev
Signed-off-by: Marc Zyngier <maz@kernel.org>

0 files changed, 0 insertions, 0 deletions