Re: [Xen-devel] [PATCH v3 53/62] arm/acpi: Map the new created EFI and ACPI tables to Dom0

[Stefano Stabellini <stefano.stabellini@xxxxxxxxxxxxx>]

On Tue, 17 Nov 2015, shannon.zhao@xxxxxxxxxx wrote:
> From: Shannon Zhao <shannon.zhao@xxxxxxxxxx>
> 
> Here we map these new created EFI and ACPI tables to the non-RAM space
> of Dom0. Then Dom0 could visit them.

"Map the UEFI and ACPI tables which we created to non-RAM space in
Dom0."


> Signed-off-by: Shannon Zhao <shannon.zhao@xxxxxxxxxx>
> ---
>  xen/arch/arm/domain_build.c | 15 +++++++++++++++
>  1 file changed, 15 insertions(+)
> 
> diff --git a/xen/arch/arm/domain_build.c b/xen/arch/arm/domain_build.c
> index 073c634..55f85b4 100644
> --- a/xen/arch/arm/domain_build.c
> +++ b/xen/arch/arm/domain_build.c
> @@ -1740,6 +1740,21 @@ static int prepare_acpi(struct domain *d, struct 
> kernel_info *kinfo)
>      acpi_create_efi_mmap_table(d->arch.efi_acpi_gpa, d->arch.efi_acpi_table,
>                                 &kinfo->mem, tbl_add);
>  
> +    /* Map the EFI and ACPI tables to Dom0 */
> +    rc = map_regions(d,
> +                     paddr_to_pfn(d->arch.efi_acpi_gpa),
> +                     DIV_ROUND_UP(d->arch.efi_acpi_len, PAGE_SIZE),

PFN_UP


> +                     paddr_to_pfn(virt_to_maddr(d->arch.efi_acpi_table)));
> +    if ( rc != 0 )
> +    {
> +        printk(XENLOG_ERR "Unable to map 0x%"PRIx64
> +               " - 0x%"PRIx64" in domain %d\n",
> +               d->arch.efi_acpi_gpa & PAGE_MASK,
> +               PAGE_ALIGN(d->arch.efi_acpi_gpa + d->arch.efi_acpi_len) - 1,
> +               d->domain_id);
> +        return rc;
> +    }
> +
>      return 0;
>  }
>  #else
> -- 
> 2.1.0
> 

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