Re: [PATCH] [PATCH] system/memory: Fix max access size

[Paolo Bonzini]

On Sat, Jul 20, 2024 at 4:30 PM Peter Maydell <peter.maydell@linaro.org> wrote:
> If the HPET timer device is supposed to permit 64 bit writes and it is not
> doing so, then that needs to be fixed in the HPET timer device model, by
> making sure that its read/write functions correctly handle the size=8 case
> and then setting access_size_max =8 in its MemoryRegionOps struct.

It does, and I've started looking into it[1].

The replacement for this patch is simple (on top of that branch):

diff --git a/hw/timer/hpet.c b/hw/timer/hpet.c
index 5e60fedc089..ac55dd1ebd6 100644
--- a/hw/timer/hpet.c
+++ b/hw/timer/hpet.c
@@ -637,6 +637,10 @@ static const MemoryRegionOps hpet_ram_ops = {
         .min_access_size = 4,
         .max_access_size = 8,
     },
+    .impl = {
+        .min_access_size = 4,
+        .max_access_size = 8,
+    },
     .endianness = DEVICE_NATIVE_ENDIAN,
 };

I'll now look into the other patch for interrupts. Thanks for testing
my changes!

Paolo

[1] https://gitlab.com/bonzini/qemu/-/commits/hpet