Re: [Qemu-devel] [PATCH 2/5] hw/pxa2xx_dma.c: drop VMSTATE_UINTTL usage

[Juan Quintela <quintela@redhat.com>]

Igor Mitsyanko <i.mitsyanko@samsung.com> wrote:
> Convert variables descr, src and dest from type target_phys_addr_t to uint32_t,
> use VMSTATE_UINT32 instead of VMSTATE_UINTTL for these variables.
> We can do it safely because:
> 1) pxa2xx has 32-bit physical address;
> 2) rest of the code in this file treats these variables as uint32_t;
> 3) we shouldn't have used VMSTATE_UINTTL in the first place because this macro
> is for target_ulong type (which can be different from target_phys_addr_t).

This is an incompatible change, we need to bump the version.

Looking at pxa2xx_dma_descriptor_fetch() it looks like your change is
enough:
    uint32_t desc[4];

    ....

    s->chan[ch].descr = desc[DDADR];
    s->chan[ch].src = desc[DSADR];
    s->chan[ch].dest = desc[DTADR];
    s->chan[ch].cmd = desc[DCMD];

i.e. we always asign from a 32bit register.

In general change is not valid.

As I don't know if this device can appear as 64bit hardware, I don't
know if the change is valid and let it to the ARM gurus.

Later, Juan.