Alvise Rigo <a.r...@virtualopensystems.com> writes:
> Allow each architecture to set the exclusive range at any LoadLink
> operation through a CPUClass hook.
nit: space or continue paragraph.
> This comes in handy to emulate, for instance, the exclusive monitor
> implemented in some ARM architectures (more precisely, the Exclusive
> Reservation Granule).
>
> Suggested-by: Jani Kokkonen <jani.kokko...@huawei.com>
> Suggested-by: Claudio Fontana <claudio.font...@huawei.com>
> Signed-off-by: Alvise Rigo <a.r...@virtualopensystems.com>
Reviewed-by: Alex Bennée <alex.ben...@linaro.org>
> ---
> include/qom/cpu.h | 4 ++++
> qom/cpu.c | 7 +++++++
> 2 files changed, 11 insertions(+)
>
> diff --git a/include/qom/cpu.h b/include/qom/cpu.h
> index c6bb6b6..9e409ce 100644
> --- a/include/qom/cpu.h
> +++ b/include/qom/cpu.h
> @@ -175,6 +175,10 @@ typedef struct CPUClass {
> void (*cpu_exec_exit)(CPUState *cpu);
> bool (*cpu_exec_interrupt)(CPUState *cpu, int interrupt_request);
>
> + /* Atomic instruction handling */
> + void (*cpu_set_excl_protected_range)(CPUState *cpu, hwaddr addr,
> + hwaddr size);
> +
> void (*disas_set_info)(CPUState *cpu, disassemble_info *info);
> } CPUClass;
>
> diff --git a/qom/cpu.c b/qom/cpu.c
> index fb80d13..a5c25a8 100644
> --- a/qom/cpu.c
> +++ b/qom/cpu.c
> @@ -203,6 +203,12 @@ static bool cpu_common_exec_interrupt(CPUState *cpu, int
> int_req)
> return false;
> }
>
> +static void cpu_common_set_excl_range(CPUState *cpu, hwaddr addr, hwaddr
> size)
> +{
> + cpu->excl_protected_range.begin = addr;
> + cpu->excl_protected_range.end = addr + size;
> +}
> +
> void cpu_dump_state(CPUState *cpu, FILE *f, fprintf_function cpu_fprintf,
> int flags)
> {
> @@ -355,6 +361,7 @@ static void cpu_class_init(ObjectClass *klass, void *data)
> k->cpu_exec_enter = cpu_common_noop;
> k->cpu_exec_exit = cpu_common_noop;
> k->cpu_exec_interrupt = cpu_common_exec_interrupt;
> + k->cpu_set_excl_protected_range = cpu_common_set_excl_range;
> dc->realize = cpu_common_realizefn;
> /*
> * Reason: CPUs still need special care by board code: wiring up
--
Alex Bennée
