Re: [Xen-devel] [PATCH v3 11/15] xen/arm: vgic-v2: Correctly handle RAZ/WI registers

[Ian Campbell <ian.campbell@xxxxxxxxxx>]

On Mon, 2015-02-16 at 14:50 +0000, Julien Grall wrote:
> All the GICv2 registers are word-accessible. Some them are also
> byte-accessible (see GICD_IPRIORITYR*).
> 
> Those registers are incorrectly implemented when they should be RAZ. Only
> word-access size are currently allowed for them.
> 
> To avoid further issues, introduce different label following the access-size
> of the registers:
>     - read_as_zero_32 and write_ignore_32: Used for registers accessible
>     via a word.
>     - read_as_zero: Used when we don't have to check the access size.
> 
> The latter is used when the access size has already been checked in the
> register emulation and/or when the register offset is reserved/implementation
> defined.
> 
> Note that, only used labels has been introduced.
> 
> Signed-off-by: Julien Grall <julien.grall@xxxxxxxxxx>

Acked-by: Ian Campbell <ian.campbell@xxxxxxxxxx>



_______________________________________________
Xen-devel mailing list
Xen-devel@xxxxxxxxxxxxx
http://lists.xen.org/xen-devel