On 03/16/2018 09:31 PM, Aaron Lindsay wrote:
> Signed-off-by: Aaron Lindsay <alind...@codeaurora.org>
> ---
> target/arm/cpu.c | 15 ++++++++++-----
> target/arm/cpu.h | 23 ++++++++++++-----------
> target/arm/internals.h | 7 ++++---
> 3 files changed, 26 insertions(+), 19 deletions(-)
>
> diff --git a/target/arm/cpu.c b/target/arm/cpu.c
> index 072cbbf..5f782bf 100644
> --- a/target/arm/cpu.c
> +++ b/target/arm/cpu.c
> @@ -55,13 +55,16 @@ static bool arm_cpu_has_work(CPUState *cs)
> | CPU_INTERRUPT_EXITTB);
> }
>
> -void arm_register_el_change_hook(ARMCPU *cpu, ARMELChangeHook *hook,
> +void arm_register_el_change_hook(ARMCPU *cpu, ARMELChangeHookFn *hook,
> void *opaque)
> {
> - /* We currently only support registering a single hook function */
> - assert(!cpu->el_change_hook);
> - cpu->el_change_hook = hook;
> - cpu->el_change_hook_opaque = opaque;
> + ARMELChangeHook *entry;
> + entry = g_malloc0(sizeof (*entry));
imho g_malloc() is enough.
> +
> + entry->hook = hook;
> + entry->opaque = opaque;
> +
> + QLIST_INSERT_HEAD(&cpu->el_change_hooks, entry, node);
> }
>
> static void cp_reg_reset(gpointer key, gpointer value, gpointer opaque)
> @@ -744,6 +747,8 @@ static void arm_cpu_realizefn(DeviceState *dev, Error
> **errp)
> return;
> }
>
> + QLIST_INIT(&cpu->el_change_hooks);
> +
You missed to fill arm_cpu_unrealizefn() with:
QLIST_FOREACH(...) {
QLIST_REMOVE(...);
g_free(...);
}
> /* Some features automatically imply others: */
> if (arm_feature(env, ARM_FEATURE_V8)) {
> set_feature(env, ARM_FEATURE_V7);
> diff --git a/target/arm/cpu.h b/target/arm/cpu.h
> index f17592b..3b45d3d 100644
> --- a/target/arm/cpu.h
> +++ b/target/arm/cpu.h
> @@ -633,11 +633,17 @@ typedef struct CPUARMState {
>
> /**
> * ARMELChangeHook:
> - * type of a function which can be registered via
> arm_register_el_change_hook()
> - * to get callbacks when the CPU changes its exception level or mode.
> + * Support registering functions with ARMELChangeHookFn's signature via
> + * arm_register_el_change_hook() to get callbacks when the CPU changes its
> + * exception level or mode.
> */
> -typedef void ARMELChangeHook(ARMCPU *cpu, void *opaque);
> -
> +typedef void ARMELChangeHookFn(ARMCPU *cpu, void *opaque);
> +typedef struct ARMELChangeHook ARMELChangeHook;
> +struct ARMELChangeHook {
> + ARMELChangeHookFn *hook;
> + void *opaque;
> + QLIST_ENTRY(ARMELChangeHook) node;
> +};
>
> /* These values map onto the return values for
> * QEMU_PSCI_0_2_FN_AFFINITY_INFO */
> @@ -826,8 +832,7 @@ struct ARMCPU {
> */
> bool cfgend;
>
> - ARMELChangeHook *el_change_hook;
> - void *el_change_hook_opaque;
> + QLIST_HEAD(, ARMELChangeHook) el_change_hooks;
>
> int32_t node_id; /* NUMA node this CPU belongs to */
>
> @@ -2895,12 +2900,8 @@ static inline AddressSpace *arm_addressspace(CPUState
> *cs, MemTxAttrs attrs)
> * CPU changes exception level or mode. The hook function will be
> * passed a pointer to the ARMCPU and the opaque data pointer passed
> * to this function when the hook was registered.
> - *
> - * Note that we currently only support registering a single hook function,
> - * and will assert if this function is called twice.
> - * This facility is intended for the use of the GICv3 emulation.
> */
> -void arm_register_el_change_hook(ARMCPU *cpu, ARMELChangeHook *hook,
> +void arm_register_el_change_hook(ARMCPU *cpu, ARMELChangeHookFn *hook,
> void *opaque);
>
> /**
> diff --git a/target/arm/internals.h b/target/arm/internals.h
> index 47cc224..7df3eda 100644
> --- a/target/arm/internals.h
> +++ b/target/arm/internals.h
> @@ -727,11 +727,12 @@ void arm_cpu_do_transaction_failed(CPUState *cs, hwaddr
> physaddr,
> int mmu_idx, MemTxAttrs attrs,
> MemTxResult response, uintptr_t retaddr);
>
> -/* Call the EL change hook if one has been registered */
> +/* Call any registered EL change hooks */
> static inline void arm_call_el_change_hook(ARMCPU *cpu)
> {
> - if (cpu->el_change_hook) {
> - cpu->el_change_hook(cpu, cpu->el_change_hook_opaque);
> + ARMELChangeHook *hook, *next;
> + QLIST_FOREACH_SAFE(hook, &cpu->el_change_hooks, node, next) {
> + hook->hook(cpu, hook->opaque);
> }
> }
>
>
