Le ven. 29 mars 2019 10:20, Peter Maydell <peter.mayd...@linaro.org> a écrit :
> On Thu, 28 Mar 2019 at 21:29, Wainer dos Santos Moschetta > <waine...@redhat.com> wrote: > > > > > > On 03/28/2019 12:29 PM, Peter Maydell wrote: > > > The Raspberry Pi boards have a physical memory map which does > > > not allow for more than 1GB of RAM. Currently if the user tries > > > to ask for more then we fail in a confusing way: > > > > > > $ qemu-system-aarch64 --machine raspi3 -m 8G > > > Unexpected error in visit_type_uintN() at qapi/qapi-visit-core.c:164: > > > qemu-system-aarch64: Parameter 'vcram-base' expects uint32_t > > > Aborted (core dumped) > > > > > > Catch this earlier and diagnose it with a more friendly message: > > > $ qemu-system-aarch64 --machine raspi3 -m 8G > > > qemu-system-aarch64: Requested ram size is too large for this machine: > maximum is 1GB > > > > > > Fixes: https://bugs.launchpad.net/qemu/+bug/1794187 > > > Signed-off-by: Peter Maydell <peter.mayd...@linaro.org> > > > --- > > > Changes v1->v2: use '>', not '>='... > > > > > > hw/arm/raspi.c | 7 +++++++ > > > 1 file changed, 7 insertions(+) > > > > > > diff --git a/hw/arm/raspi.c b/hw/arm/raspi.c > > > index 66899c28dc1..fe2bb511b98 100644 > > > --- a/hw/arm/raspi.c > > > +++ b/hw/arm/raspi.c > > > @@ -12,6 +12,7 @@ > > > */ > > > > > > #include "qemu/osdep.h" > > > +#include "qemu/units.h" > > > #include "qapi/error.h" > > > #include "qemu-common.h" > > > #include "cpu.h" > > > @@ -175,6 +176,12 @@ static void raspi_init(MachineState *machine, int > version) > > > BusState *bus; > > > DeviceState *carddev; > > > > > > + if (machine->ram_size > 1 * GiB) { > > > + error_report("Requested ram size is too large for this > machine: " > > > + "maximum is 1GB"); > > > > 1GB vs 1GiB... maybe the message should display "GiB" to avoid any > > confusion? > > I don't know why we call our #defined constant GiB -- to me > the unit is GB and I think printing anything else in user > messages is weird. > There was a discussion with Stefan and few other in 2017 the outcome was to use the explicit IEC standard (and avoid confusion with 1kHz i.e.). https://en.m.wikipedia.org/wiki/Kibibyte "The *kibibyte* is a multiple of the unit byte <https://en.m.wikipedia.org/wiki/Byte> for quantities of digital information <https://en.m.wikipedia.org/wiki/Information>. The binary prefix <https://en.m.wikipedia.org/wiki/Binary_prefix> *kibi <https://en.m.wikipedia.org/wiki/Kibi->* means 210, or 1024; therefore, 1 kibibyte is 1024 bytes. The unit symbol for the kibibyte is *KiB*." > thanks > -- PMM >