Am 01.08.2013 16:12, schrieb Jason J. Herne:
> From: "Jason J. Herne" <jjhe...@us.ibm.com>
>
> Modify s390_cpu_addr2state to allow fetching state information for cpu
> addresses
> above smp_cpus. Hotplug requires this capability.
>
> Also add s390_cpu_set_state function to allow modification of ipi_state
> entries
> during hotplug.
>
> Signed-off-by: Jason J. Herne <jjhe...@us.ibm.com>
> ---
> hw/s390x/s390-virtio.c | 9 +++++----
> target-s390x/cpu.h | 2 +-
> 2 files changed, 6 insertions(+), 5 deletions(-)
>
> diff --git a/hw/s390x/s390-virtio.c b/hw/s390x/s390-virtio.c
> index 21e9124..5ad9cf3 100644
> --- a/hw/s390x/s390-virtio.c
> +++ b/hw/s390x/s390-virtio.c
> @@ -54,12 +54,13 @@
> static VirtIOS390Bus *s390_bus;
> static S390CPU **ipi_states;
>
> -S390CPU *s390_cpu_addr2state(uint16_t cpu_addr)
> +void s390_cpu_set_ipistate(uint16_t cpu_addr, S390CPU *state)
> {
> - if (cpu_addr >= smp_cpus) {
> - return NULL;
> - }
> + ipi_states[cpu_addr] = state;
> +}
>
> +S390CPU *s390_cpu_addr2state(uint16_t cpu_addr)
> +{
> return ipi_states[cpu_addr];
> }
>
This is what got us into the link<> discussion last time. If we do
for (i = 0; i < ARRAY_SIZE(ipi_states); i++) {
name = g_strdup_printf("cpu[%i]", i);
object_property_add_link(qdev_get_machine(), name, TYPE_S390_CPU,
&ipi_states[i], &err);
}
then we get said /machine/cpu[n] link<> properties, at a QMP level
either returning nothing or the canonical path to the CPU object.
On IRC I didn't get an answer of whether it was being done the above way
because there is infrastructure missing, and a look at object.h now
confirms that suspicion. CC'ing Anthony and Paolo.
Since object_property_add_link() uses a NULL opaque, my idea would be to
add a single setter hook argument passed through as opaque to
object_set_link_property(), which would call it with the old and the new
value.
The purpose would be to avoid growing our own internal setter API, which
is disjoint from the QMP qom-set we are targetting at.
Regards,
Andreas
> diff --git a/target-s390x/cpu.h b/target-s390x/cpu.h
> index 877eac7..62eb810 100644
> --- a/target-s390x/cpu.h
> +++ b/target-s390x/cpu.h
> @@ -377,7 +377,7 @@ static inline void kvm_s390_interrupt_internal(S390CPU
> *cpu, int type,
>
> uint8_t *s390_get_storage_keys(void);
> void s390_alloc_storage_keys(ram_addr_t ram_size);
> -
> +void s390_cpu_set_ipistate(uint16_t cpu_addr, S390CPU *state);
> S390CPU *s390_cpu_addr2state(uint16_t cpu_addr);
> void s390_add_running_cpu(S390CPU *cpu);
> unsigned s390_del_running_cpu(S390CPU *cpu);
>
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