Re: [PATCH v7 6/6] lsi53c895a: disable reentrancy detection for script RAM

[Darren Kenny]

On Monday, 2023-03-13 at 04:24:17 -04, Alexander Bulekov wrote:
> As the code is designed to use the memory APIs to access the script ram,
> disable reentrancy checks for the pseudo-RAM ram_io MemoryRegion.
>
> In the future, ram_io may be converted from an IO to a proper RAM 
> MemoryRegion.
>
> Reported-by: Fiona Ebner <f.ebner@proxmox.com>
> Signed-off-by: Alexander Bulekov <alxndr@bu.edu>

Reviewed-by: Darren Kenny <darren.kenny@oracle.com>

> ---
>  hw/scsi/lsi53c895a.c | 6 ++++++
>  1 file changed, 6 insertions(+)
>
> diff --git a/hw/scsi/lsi53c895a.c b/hw/scsi/lsi53c895a.c
> index af93557a9a..db27872963 100644
> --- a/hw/scsi/lsi53c895a.c
> +++ b/hw/scsi/lsi53c895a.c
> @@ -2302,6 +2302,12 @@ static void lsi_scsi_realize(PCIDevice *dev, Error 
> **errp)
>      memory_region_init_io(&s->io_io, OBJECT(s), &lsi_io_ops, s,
>                            "lsi-io", 256);
>  
> +    /*
> +     * Since we use the address-space API to interact with ram_io, disable 
> the
> +     * re-entrancy guard.
> +     */
> +    s->ram_io.disable_reentrancy_guard = true;
> +
>      address_space_init(&s->pci_io_as, pci_address_space_io(dev), 
> "lsi-pci-io");
>      qdev_init_gpio_out(d, &s->ext_irq, 1);
>  
> -- 
> 2.39.0