[Qemu-devel] Re: [PATCH 2/5] isolate io handling routing

[Anthony Liguori <anthony@codemonkey.ws>]

Glauber Costa wrote:
> introduce cpu_physical_memory_do_io, which handles
> the mmio part of cpu_physical_memory_rw. KVM can use
> it to do mmio, since mmio is essentially the same for
> both KVM and tcg.
>
> Signed-off-by: Glauber Costa <glommer@redhat.com>
> ---
>  cpu-all.h |    2 +
>  exec.c    |   89 ++++++++++++++++++++++++++++++++++--------------------------
>  2 files changed, 52 insertions(+), 39 deletions(-)
>
> diff --git a/cpu-all.h b/cpu-all.h
> index 648264c..d46da05 100644
> --- a/cpu-all.h
> +++ b/cpu-all.h
> @@ -910,6 +910,8 @@ int cpu_register_io_memory(int io_index,
>  CPUWriteMemoryFunc **cpu_get_io_memory_write(int io_index);
>  CPUReadMemoryFunc **cpu_get_io_memory_read(int io_index);
>  
> +int cpu_physical_memory_do_io(target_phys_addr_t addr, uint8_t *buf, int l,
> +                            int is_write, unsigned long pd);
>  void cpu_physical_memory_rw(target_phys_addr_t addr, uint8_t *buf,
>                              int len, int is_write);
>  static inline void cpu_physical_memory_read(target_phys_addr_t addr,
> diff --git a/exec.c b/exec.c
> index 44f6a42..04eadfe 100644
> --- a/exec.c
> +++ b/exec.c
> @@ -2891,12 +2891,58 @@ void cpu_physical_memory_rw(target_phys_addr_t addr, uint8_t *buf,
>  }
>  
>  #else
> +int cpu_physical_memory_do_io(target_phys_addr_t addr, uint8_t *buf, int l, int is_write, unsigned long pd)
> +{
> +    int io_index;
> +    uint32_t val;
> +
> +    io_index = (pd >> IO_MEM_SHIFT) & (IO_MEM_NB_ENTRIES - 1);
> +    if (is_write) {
> +                /* XXX: could force cpu_single_env to NULL to avoid
>   

That's      some       big      identing      :-)

Regards,

Anthony Liguori