Re: [Qemu-devel] [PATCH 1/1] vmstateify rc4030

["Dr. David Alan Gilbert" <dgilbert@redhat.com>]

* Hervé Poussineau (hpoussin@reactos.org) wrote:
> Hi,
> 
> Le 18/07/2016 à 17:18, Dr. David Alan Gilbert (git) a écrit :
> > From: "Dr. David Alan Gilbert" <dgilbert@redhat.com>
> > 
> > rc4030 seems to be part of a MIPS chipset; this converts it to
> > VMState.
> > 
> >   Note:
> >     a) It builds but I've not found a way to boot a MIPS Jazz image to
> > test it.
> >     b) It was saving 0..<15 on the 16 entry rem_speed array; I've not
> > got a clue what that array is but I'm now saving the whole 16 entries
> > rather than 15.
> > 
> > Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
> 
> rc4030 is the main chipset of MIPS Jazz machines (like Magnum or PICA 61). It is both a interrupt controller, a DMA controller and a memory controller.
> - savevm on magnum doesn't work (before and after your patch) and crashes QEMU when saving(?) g364 framebuffer state.

Fun - your vmstate_g364fb looks OK, assuming vram_size is sane.

> - savevm + loadvm on pica61 works.

Great.

> The rem_speed[15] (whatever rem_speed means) is the interrupt mask register, that is currently stored in imr_jazz field.

Except Aurelien's patch 9ea0b7a139 made rem_speed[15] exist, where it used to be just 0..14?

> Reviewed-by: Hervé Poussineau <hpoussin@reactos.org>
> Tested-by: Hervé Poussineau <hpoussin@reactos.org>

Thanks!

Dave

> 
> Hervé
> 
> > ---
> >  hw/dma/rc4030.c | 81 +++++++++++++++++++--------------------------------------
> >  1 file changed, 27 insertions(+), 54 deletions(-)
> > 
> > diff --git a/hw/dma/rc4030.c b/hw/dma/rc4030.c
> > index 2f2576f..17c8518 100644
> > --- a/hw/dma/rc4030.c
> > +++ b/hw/dma/rc4030.c
> > @@ -616,34 +616,9 @@ static void rc4030_reset(DeviceState *dev)
> >      qemu_irq_lower(s->jazz_bus_irq);
> >  }
> > 
> > -static int rc4030_load(QEMUFile *f, void *opaque, int version_id)
> > +static int rc4030_post_load(void *opaque, int version_id)
> >  {
> >      rc4030State* s = opaque;
> > -    int i, j;
> > -
> > -    if (version_id != 2)
> > -        return -EINVAL;
> > -
> > -    s->config = qemu_get_be32(f);
> > -    s->invalid_address_register = qemu_get_be32(f);
> > -    for (i = 0; i < 8; i++)
> > -        for (j = 0; j < 4; j++)
> > -            s->dma_regs[i][j] = qemu_get_be32(f);
> > -    s->dma_tl_base = qemu_get_be32(f);
> > -    s->dma_tl_limit = qemu_get_be32(f);
> > -    s->cache_maint = qemu_get_be32(f);
> > -    s->remote_failed_address = qemu_get_be32(f);
> > -    s->memory_failed_address = qemu_get_be32(f);
> > -    s->cache_ptag = qemu_get_be32(f);
> > -    s->cache_ltag = qemu_get_be32(f);
> > -    s->cache_bmask = qemu_get_be32(f);
> > -    s->memory_refresh_rate = qemu_get_be32(f);
> > -    s->nvram_protect = qemu_get_be32(f);
> > -    for (i = 0; i < 15; i++)
> > -        s->rem_speed[i] = qemu_get_be32(f);
> > -    s->imr_jazz = qemu_get_be32(f);
> > -    s->isr_jazz = qemu_get_be32(f);
> > -    s->itr = qemu_get_be32(f);
> > 
> >      set_next_tick(s);
> >      update_jazz_irq(s);
> > @@ -651,32 +626,31 @@ static int rc4030_load(QEMUFile *f, void *opaque, int version_id)
> >      return 0;
> >  }
> > 
> > -static void rc4030_save(QEMUFile *f, void *opaque)
> > -{
> > -    rc4030State* s = opaque;
> > -    int i, j;
> > -
> > -    qemu_put_be32(f, s->config);
> > -    qemu_put_be32(f, s->invalid_address_register);
> > -    for (i = 0; i < 8; i++)
> > -        for (j = 0; j < 4; j++)
> > -            qemu_put_be32(f, s->dma_regs[i][j]);
> > -    qemu_put_be32(f, s->dma_tl_base);
> > -    qemu_put_be32(f, s->dma_tl_limit);
> > -    qemu_put_be32(f, s->cache_maint);
> > -    qemu_put_be32(f, s->remote_failed_address);
> > -    qemu_put_be32(f, s->memory_failed_address);
> > -    qemu_put_be32(f, s->cache_ptag);
> > -    qemu_put_be32(f, s->cache_ltag);
> > -    qemu_put_be32(f, s->cache_bmask);
> > -    qemu_put_be32(f, s->memory_refresh_rate);
> > -    qemu_put_be32(f, s->nvram_protect);
> > -    for (i = 0; i < 15; i++)
> > -        qemu_put_be32(f, s->rem_speed[i]);
> > -    qemu_put_be32(f, s->imr_jazz);
> > -    qemu_put_be32(f, s->isr_jazz);
> > -    qemu_put_be32(f, s->itr);
> > -}
> > +static const VMStateDescription vmstate_rc4030 = {
> > +    .name = "rc4030",
> > +    .version_id = 3,
> > +    .post_load = rc4030_post_load,
> > +    .fields = (VMStateField []) {
> > +        VMSTATE_UINT32(config, rc4030State),
> > +        VMSTATE_UINT32(invalid_address_register, rc4030State),
> > +        VMSTATE_UINT32_2DARRAY(dma_regs, rc4030State, 8, 4),
> > +        VMSTATE_UINT32(dma_tl_base, rc4030State),
> > +        VMSTATE_UINT32(dma_tl_limit, rc4030State),
> > +        VMSTATE_UINT32(cache_maint, rc4030State),
> > +        VMSTATE_UINT32(remote_failed_address, rc4030State),
> > +        VMSTATE_UINT32(memory_failed_address, rc4030State),
> > +        VMSTATE_UINT32(cache_ptag, rc4030State),
> > +        VMSTATE_UINT32(cache_ltag, rc4030State),
> > +        VMSTATE_UINT32(cache_bmask, rc4030State),
> > +        VMSTATE_UINT32(memory_refresh_rate, rc4030State),
> > +        VMSTATE_UINT32(nvram_protect, rc4030State),
> > +        VMSTATE_UINT32_ARRAY(rem_speed, rc4030State, 16),
> > +        VMSTATE_UINT32(imr_jazz, rc4030State),
> > +        VMSTATE_UINT32(isr_jazz, rc4030State),
> > +        VMSTATE_UINT32(itr, rc4030State),
> > +        VMSTATE_END_OF_LIST()
> > +    }
> > +};
> > 
> >  static void rc4030_do_dma(void *opaque, int n, uint8_t *buf, int len, int is_write)
> >  {
> > @@ -753,8 +727,6 @@ static void rc4030_initfn(Object *obj)
> >      sysbus_init_irq(sysbus, &s->timer_irq);
> >      sysbus_init_irq(sysbus, &s->jazz_bus_irq);
> > 
> > -    register_savevm(NULL, "rc4030", 0, 2, rc4030_save, rc4030_load, s);
> > -
> >      sysbus_init_mmio(sysbus, &s->iomem_chipset);
> >      sysbus_init_mmio(sysbus, &s->iomem_jazzio);
> >  }
> > @@ -813,6 +785,7 @@ static void rc4030_class_init(ObjectClass *klass, void *class_data)
> >      dc->realize = rc4030_realize;
> >      dc->unrealize = rc4030_unrealize;
> >      dc->reset = rc4030_reset;
> > +    dc->vmsd = &vmstate_rc4030;
> >  }
> > 
> >  static const TypeInfo rc4030_info = {
> > 
> 
--
Dr. David Alan Gilbert / dgilbert@redhat.com / Manchester, UK