Re: [Xen-devel] [PATCH v2 2/2] xen/arm: Blacklist SMMU on Thunder-X

[Stefano Stabellini <sstabellini@xxxxxxxxxx>]

On Wed, 14 Feb 2018, Julien Grall wrote:
> Xen does not yet support Cavium SMMU because it requires some
> workaround. For the time being, blacklist them.
> 
> Signed-off-by: Julien Grall <julien.grall@xxxxxxx>

Acked-by: Stefano Stabellini <sstabellini@xxxxxxxxxx>


> ---
>     Changes in v2:
>         - Fix compatible string
> ---
>  xen/arch/arm/platforms/Makefile   |  1 +
>  xen/arch/arm/platforms/thunderx.c | 39 
> +++++++++++++++++++++++++++++++++++++++
>  2 files changed, 40 insertions(+)
>  create mode 100644 xen/arch/arm/platforms/thunderx.c
> 
> diff --git a/xen/arch/arm/platforms/Makefile b/xen/arch/arm/platforms/Makefile
> index 53a47e48d2..80e555cc14 100644
> --- a/xen/arch/arm/platforms/Makefile
> +++ b/xen/arch/arm/platforms/Makefile
> @@ -6,5 +6,6 @@ obj-$(CONFIG_ARM_32) += omap5.o
>  obj-$(CONFIG_ARM_32) += rcar2.o
>  obj-$(CONFIG_ARM_64) += seattle.o
>  obj-y += sunxi.o
> +obj-$(CONFIG_ARM_64) += thunderx.o
>  obj-$(CONFIG_ARM_64) += xgene-storm.o
>  obj-$(CONFIG_ARM_64) += xilinx-zynqmp.o
> diff --git a/xen/arch/arm/platforms/thunderx.c 
> b/xen/arch/arm/platforms/thunderx.c
> new file mode 100644
> index 0000000000..9b32a29c6b
> --- /dev/null
> +++ b/xen/arch/arm/platforms/thunderx.c
> @@ -0,0 +1,39 @@
> +/*
> + * xen/arch/arm/platforms/thunderx.c
> + *
> + * Cavium Thunder-X specific settings
> + *
> + * Copyright (c) 2018 ARM Ltd.
> + *
> + * This program is free software; you can redistribute it and/or modify
> + * it under the terms of the GNU General Public License as published by
> + * the Free Software Foundation; under version 2 of the License.
> + *
> + * This program is distributed in the hope that it will be useful,
> + * but WITHOUT ANY WARRANTY; without even the implied warranty of
> + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
> + * GNU General Public License for more details.
> + *
> + * You should have received a copy of the GNU General Public License
> + * along with this program; If not, see <http://www.gnu.org/licenses/>.
> + */
> +
> +#include <asm/platform.h>
> +
> +static const char * const thunderx_dt_compat[] __initconst =
> +{
> +    "cavium,thunder-88xx",
> +    NULL
> +};
> +
> +static const struct dt_device_match thunderx_blacklist_dev[] __initconst =
> +{
> +    /* Cavium has its own SMMU which is not yet supported. */
> +    DT_MATCH_COMPATIBLE("cavium,smmu-v2"),
> +    { /* sentinel */ },
> +};
> +
> +PLATFORM_START(thunderx, "THUNDERX")
> +    .compatible = thunderx_dt_compat,
> +    .blacklist_dev = thunderx_blacklist_dev,
> +PLATFORM_END
> -- 
> 2.11.0
> 

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