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Re: [RFC PATCH 21/21] xen/arm: vIOMMU: Modify the partial device tree for dom0less
- To: Rahul Singh <rahul.singh@xxxxxxx>, <xen-devel@xxxxxxxxxxxxxxxxxxxx>
- From: Stewart Hildebrand <stewart.hildebrand@xxxxxxx>
- Date: Tue, 3 Jan 2023 10:25:12 -0500
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- Cc: Stefano Stabellini <sstabellini@xxxxxxxxxx>, Julien Grall <julien@xxxxxxx>, Bertrand Marquis <bertrand.marquis@xxxxxxx>, "Volodymyr Babchuk" <Volodymyr_Babchuk@xxxxxxxx>
- Delivery-date: Tue, 03 Jan 2023 15:25:29 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
On 12/1/22 11:02, Rahul Singh wrote:
> To configure IOMMU in guest for passthrough devices, user will need to
> copy the unmodified "iommus" property from host device tree to partial
> device tree. To enable the dom0 linux kernel to confiure the IOMMU
> correctly replace the phandle in partial device tree with virtual
> IOMMU phandle when "iommus" property is set.
>
> Signed-off-by: Rahul Singh <rahul.singh@xxxxxxx>
> ---
> xen/arch/arm/domain_build.c | 31 ++++++++++++++++++++++++++++++-
> 1 file changed, 30 insertions(+), 1 deletion(-)
>
> diff --git a/xen/arch/arm/domain_build.c b/xen/arch/arm/domain_build.c
> index 7cd99a6771..afb3e76409 100644
> --- a/xen/arch/arm/domain_build.c
> +++ b/xen/arch/arm/domain_build.c
> @@ -3235,7 +3235,35 @@ static int __init handle_prop_pfdt(struct kernel_info
> *kinfo,
> return ( propoff != -FDT_ERR_NOTFOUND ) ? propoff : 0;
> }
>
> -static int __init scan_pfdt_node(struct kernel_info *kinfo, const void *pfdt,
> +static void modify_pfdt_node(void *pfdt, int nodeoff)
This should have the __init attribute
|
