Re: [PATCH] hw/sd/pxa2xx_mmci: Disable reentrancy detection

[Philippe Mathieu-Daudé]

Hi Guenter,

On 13/12/23 18:12, Peter Maydell wrote:
> On Wed, 13 Dec 2023 at 01:49, Guenter Roeck <linux@roeck-us.net> wrote:
> > All tests using pxa2xx_mmc to access mmc cards on pxa2xx platforms
> > such as borzoi fail starting with commit a2e1753b80 ("memory: prevent
> > dma-reentracy issues"). Disable reentrancy guard to fix the problem.
> >
> > Fixes: a2e1753b80 ("memory: prevent dma-reentracy issues")
> > Signed-off-by: Guenter Roeck <linux@roeck-us.net>
> > ---
> >   hw/sd/pxa2xx_mmci.c | 2 ++
> >   1 file changed, 2 insertions(+)
> >
> > diff --git a/hw/sd/pxa2xx_mmci.c b/hw/sd/pxa2xx_mmci.c
> > index 5e8ea69188..27ae8f2888 100644
> > --- a/hw/sd/pxa2xx_mmci.c
> > +++ b/hw/sd/pxa2xx_mmci.c
> > @@ -555,6 +555,8 @@ static void pxa2xx_mmci_instance_init(Object *obj)
> >       qdev_init_gpio_out_named(dev, &s->rx_dma, "rx-dma", 1);
> >       qdev_init_gpio_out_named(dev, &s->tx_dma, "tx-dma", 1);
> >
> > +    s->iomem.disable_reentrancy_guard = true;
> > +
>
> All patches that set this flag should include a comment which
> explains what the device access path that triggers the reentrancy
> is, please.

Can we get a reproducer or backtrace please?