Re: [Xen-devel] [PATCH v4 11/19] xen: get memory map from hypervisor for PVH

[Roger Pau Monné <roger.pau@xxxxxxxxxx>]

On Fri, Nov 02, 2018 at 01:37:30PM +0100, Juergen Gross wrote:
> Retrieve the memory map from the hypervisor and normalize it to contain
> no overlapping entries and to be sorted by address.
> 
> Signed-off-by: Juergen Gross <jgross@xxxxxxxx>
> ---
> V3: use grub_e820_mmap_entry instead of own struct (Daniel Kiper)
> ---
>  grub-core/kern/i386/xen/pvh.c | 96 
> ++++++++++++++++++++++++++++++++++++++++++-
>  1 file changed, 95 insertions(+), 1 deletion(-)
> 
> diff --git a/grub-core/kern/i386/xen/pvh.c b/grub-core/kern/i386/xen/pvh.c
> index 7e90a4538..58e6fefd5 100644
> --- a/grub-core/kern/i386/xen/pvh.c
> +++ b/grub-core/kern/i386/xen/pvh.c
> @@ -23,9 +23,14 @@
>  #include <grub/i386/cpuid.h>
>  #include <grub/i386/io.h>
>  #include <grub/xen.h>
> +#include <grub/i386/linux.h>
>  #include <grub/machine/kernel.h>
> +#include <grub/machine/memory.h>
> +#include <xen/memory.h>
>  
> -#define XEN_CONSOLE_PORT   0xe9
> +#define XEN_CONSOLE_PORT      0xe9
> +
> +#define XEN_MEMORY_MAP_SIZE   128
>  
>  grub_uint64_t grub_rsdp_addr;
>  
> @@ -33,6 +38,8 @@ static char hypercall_page[GRUB_XEN_PAGE_SIZE]
>    __attribute__ ((aligned (GRUB_XEN_PAGE_SIZE)));
>  
>  static grub_uint32_t xen_cpuid_base;
> +static struct grub_e820_mmap_entry map[XEN_MEMORY_MAP_SIZE];
> +static unsigned int nr_map_entries;
>  
>  static void
>  grub_xen_panic (const char *msg)
> @@ -92,11 +99,98 @@ grub_xen_hypercall (grub_uint32_t callno, grub_uint32_t 
> a0,
>    return __res;
>  }
>  
> +static void
> +grub_xen_sort_mmap (void)

There's nothing Xen-specific about this function, shouldn't it reside
in some x86 related file?

Thanks, Roger.

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