Re: [PATCH V2] hw/riscv: virt: Remove size restriction for pflash

["Alex Bennée" <alex.bennee@linaro.org>]

Sunil V L <sunilvl@ventanamicro.com> writes:

> On Mon, Nov 07, 2022 at 01:06:38PM +0000, Peter Maydell wrote:
>> On Mon, 7 Nov 2022 at 13:03, Sunil V L <sunilvl@ventanamicro.com> wrote:
>> >
>> > The pflash implementation currently assumes fixed size of the
>> > backend storage. Due to this, the backend storage file needs to be
>> > exactly of size 32M. Otherwise, there will be an error like below.
>> >
>> > "device requires 33554432 bytes, block backend provides 4194304 bytes"
>> >
>> > Fix this issue by using the actual size of the backing store.
>> >
>> > Signed-off-by: Sunil V L <sunilvl@ventanamicro.com>
>> > ---
>> 
>> Do you really want the flash device size presented to the guest
>> to be variable depending on what the user passed as a block backend?
>> I don't think this is how we handle flash devices on other boards...
>> 
>
> Hi Peter,
>
> x86 appears to support variable flash but arm doesn't. What is
> the reason for not supporting variable size flash in arm?

If I recall from the last time we went around this is was the question
of what you should pad it with.

  https://patchew.org/QEMU/20190307093723.655-1-armbru@redhat.com/20190307093723.655-3-armbru@redhat.com/

>
> Thanks
> Sunil


-- 
Alex Bennée