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Re: hw/misc/aspeed_scu: 5d971f9e breaks Supermicro AST2400

From: Erik Smit
Subject: Re: hw/misc/aspeed_scu: 5d971f9e breaks Supermicro AST2400
Date: Mon, 13 Jul 2020 10:06:54 +0200

Hi Cédric,

On Mon, 13 Jul 2020 at 09:52, Cédric Le Goater <clg@kaod.org> wrote:
> With this patch, the supermicro firmware boots further but there is still
> an issue. It might be the flash definition I used. The machine is detected
> as an AST2300 SoC which is weird.

> BMC flash ID:0x19ba20
> Unable to handle kernel NULL pointer dereference at virtual address 00000000

The firmware is expecting the flash ID to repeat. The following makes it boot.
Not sure if this is the right way to go.

diff --git a/hw/block/m25p80.c b/hw/block/m25p80.c
index 8227088441..5000930800 100644
--- a/hw/block/m25p80.c
+++ b/hw/block/m25p80.c
@@ -1041,7 +1041,7 @@ static void decode_new_cmd(Flash *s, uint32_t value)
             s->data[i] = s->pi->id[i];
         for (; i < SPI_NOR_MAX_ID_LEN; i++) {
-            s->data[i] = 0;
+            s->data[i] = s->pi->id[i % s->pi->id_len];

         s->len = SPI_NOR_MAX_ID_LEN;

Best Regards,

Erik Smit

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