Re: [Xen-devel] [PATCH V2 8/8] xen/arm: Set logical CPUID in DT node for dom0 the same as MPIDR

[Julien Grall <julien.grall@xxxxxxxxxx>]

Hi Chen,

On 23/05/2015 15:52, Chen Baozi wrote:
> From: Chen Baozi <baozich@xxxxxxxxx>
>
> This patch does the same thing as the previous one but for dom0 kernel.
Please be explicit, the 2 patches may not be contiguous in Xen upstream.

> Signed-off-by: Chen Baozi <baozich@xxxxxxxxx>
> ---
>   xen/arch/arm/domain_build.c | 11 ++++++++---
>   1 file changed, 8 insertions(+), 3 deletions(-)
>
> diff --git a/xen/arch/arm/domain_build.c b/xen/arch/arm/domain_build.c
> index a156de9..28b4f75 100644
> --- a/xen/arch/arm/domain_build.c
> +++ b/xen/arch/arm/domain_build.c
> @@ -712,6 +712,7 @@ static int make_cpus_node(const struct domain *d, void *fdt,
>       char buf[15];
>       u32 clock_frequency;
>       bool_t clock_valid;
> +    uint32_t cpu_id;
>
>       DPRINT("Create cpus node\n");
>
> @@ -761,9 +762,13 @@ static int make_cpus_node(const struct domain *d, void 
> *fdt,
>
>       for ( cpu = 0; cpu < d->max_vcpus; cpu++ )
>       {
> -        DPRINT("Create cpu@%u node\n", cpu);
> +        /*
> +         * Linux kernel assumes that MPIDR is equal to logical CPUID
> +         */
Same remark as patch #7.

> +        cpu_id = vcpuid_to_vaffinity(cpu);
> +        DPRINT("Create cpu@%x node\n", cpu_id);
>
> -        snprintf(buf, sizeof(buf), "cpu@%u", cpu);
> +        snprintf(buf, sizeof(buf), "cpu@%x", cpu_id);
>           res = fdt_begin_node(fdt, buf);
>           if ( res )
>               return res;
> @@ -776,7 +781,7 @@ static int make_cpus_node(const struct domain *d, void *fdt,
>           if ( res )
>               return res;
>
> -        res = fdt_property_cell(fdt, "reg", cpu);
> +        res = fdt_property_cell(fdt, "reg", cpu_id);
>           if ( res )
>               return res;
Regards,

--
Julien Grall

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