Re: [PATCH 0/1] target/arm: Fix SCR_EL3 migration issue

[Philippe Mathieu-Daudé]

Cc'ing avocado-devel for test idea.

On 1/28/21 3:31 PM, michael.nawrocki--- via wrote:
> The SCR_EL3 register reset value (0)  and the value produced when
> writing 0 via the scr_write function (set as writefn in the register
> struct) differ. This causes migration to fail.
> 
> I believe the solution is to specify a raw_writefn for that register.
> 
> Failing invocation:
> $ qemu-system-arm -machine vexpress-a9 -cpu cortex-a9 -nographic
> QEMU 5.2.0 monitor - type 'help' for more information
> (qemu) migrate "exec:cat > img"
> (qemu) q
> $ qemu-system-arm -machine vexpress-a9 -cpu cortex-a9 -nographic -incoming 
> "exec:cat img"
> qemu-system-arm: error while loading state for instance 0x0 of device 'cpu'
> qemu-system-arm: load of migration failed: Operation not permitted
> 
> 
> Mike Nawrocki (1):
>   target/arm: Add raw_writefn to SCR_EL3 register
> 
>  target/arm/helper.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
>