Re: [PATCH 3/3] x86/PVH: Support relocatable dom0 kernels

[Jan Beulich <jbeulich@xxxxxxxx>]

On 06.03.2024 19:50, Jason Andryuk wrote:
> --- a/xen/arch/x86/hvm/dom0_build.c
> +++ b/xen/arch/x86/hvm/dom0_build.c
> @@ -537,6 +537,109 @@ static paddr_t __init find_memory(
>      return INVALID_PADDR;
>  }
>  
> +static bool __init check_load_address(
> +    const struct domain *d, const struct elf_binary *elf)
> +{
> +    paddr_t kernel_start = (paddr_t)elf->dest_base & PAGE_MASK;
> +    paddr_t kernel_end = ROUNDUP((paddr_t)elf->dest_base + elf->dest_size,
> +                                 PAGE_SIZE);
> +    unsigned int i;
> +
> +    /*
> +     * The memory map is sorted and all RAM regions starts and sizes are
> +     * aligned to page boundaries.
> +     */
> +    for ( i = 0; i < d->arch.nr_e820; i++ )
> +    {
> +        paddr_t start = d->arch.e820[i].addr;
> +        paddr_t end = d->arch.e820[i].addr + d->arch.e820[i].size;
> +
> +        if ( start <= kernel_start &&
> +             end >= kernel_end &&
> +             d->arch.e820[i].type == E820_RAM )
> +            return true;
> +    }
> +
> +    return false;
> +}
> +
> +/*
> + * Find an e820 RAM region that fits the kernel at a suitable alignment.
> + */
> +static paddr_t find_kernel_memory(

__init ?

Jan