@@ -89,10 +89,17 @@ u64 timer_get_cval(struct arch_timer_context *ctxt)
static u64 timer_get_offset(struct arch_timer_context *ctxt)
{
- if (ctxt && ctxt->offset.vm_offset)
- return *ctxt->offset.vm_offset;
+ u64 offset = 0;
- return 0;
+ if (!ctxt)
+ return 0;
+
+ if (ctxt->offset.vm_offset)
+ offset += *ctxt->offset.vm_offset;
+ if (ctxt->offset.vcpu_offset)
+ offset += *ctxt->offset.vcpu_offset;
+
+ return offset;
}
static void timer_set_ctl(struct arch_timer_context *ctxt, u32 ctl)
@@ -29,6 +29,11 @@ struct arch_timer_offset {
* structure. If NULL, assume a zero offset.
*/
u64 *vm_offset;
+ /*
+ * If set, pointer to one of the offsets in the vcpu's sysreg
+ * array. If NULL, assume a zero offset.
+ */
+ u64 *vcpu_offset;
};
struct arch_timer_vm_data {
Being able to set a global offset isn't enough. With NV, we also need to a per-vcpu, per-timer offset (for example, CNTVCT_EL0 being offset by CNTVOFF_EL2). Use a similar method as the VM-wide offset to have a timer point to the shadow register that contains the offset value. Signed-off-by: Marc Zyngier <maz@kernel.org> --- arch/arm64/kvm/arch_timer.c | 13 ++++++++++--- include/kvm/arm_arch_timer.h | 5 +++++ 2 files changed, 15 insertions(+), 3 deletions(-)