[PATCH v9 14/43] KVM: arm64: Support timers in realm RECs

[Gavin Shan]

On 6/11/25 8:48 PM, Steven Price wrote:
> The RMM keeps track of the timer while the realm REC is running, but on
> exit to the normal world KVM is responsible for handling the timers.
> 
> The RMM doesn't provide a mechanism to set the counter offset, so don't
> expose KVM_CAP_COUNTER_OFFSET for a realm VM.
> 
> A later patch adds the support for propagating the timer values from the
> exit data structure and calling kvm_realm_timers_update().
> 
> Reviewed-by: Suzuki K Poulose <suzuki.poulose at arm.com>
> Signed-off-by: Steven Price <steven.price at arm.com>
> ---
> Changes since v7:
>   * Hide KVM_CAP_COUNTER_OFFSET for realm guests.
> ---
>   arch/arm64/kvm/arch_timer.c  | 48 +++++++++++++++++++++++++++++++++---
>   arch/arm64/kvm/arm.c         |  2 +-
>   include/kvm/arm_arch_timer.h |  2 ++
>   3 files changed, 47 insertions(+), 5 deletions(-)
> 

Reviewed-by: Gavin Shan <gshan at redhat.com>