Re: [kvm-unit-tests PATCH] s390x: Initialize the physical allocator on mem init

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On 10.01.19 11:34, Janosch Frank wrote:
> The physical and virtual allocators can coexist, so we can initialize
> the former and allocate pages without breaking VM alloc.
> 
> Signed-off-by: Janosch Frank <frankja@xxxxxxxxxxxxx>
> ---
>  lib/s390x/sclp.c | 9 +++++++++
>  1 file changed, 9 insertions(+)
> 
> diff --git a/lib/s390x/sclp.c b/lib/s390x/sclp.c
> index e14f25d..52be655 100644
> --- a/lib/s390x/sclp.c
> +++ b/lib/s390x/sclp.c
> @@ -18,6 +18,7 @@
>  #include <asm/spinlock.h>
>  #include "sclp.h"
>  #include <alloc_phys.h>
> +#include <alloc_page.h>
>  
>  extern unsigned long stacktop;
>  
> @@ -31,9 +32,17 @@ static struct spinlock sclp_lock;
>  
>  static void mem_init(phys_addr_t mem_end)
>  {
> +	phys_addr_t base, top;

nit: move this one line down

>  	phys_addr_t freemem_start = (phys_addr_t)&stacktop;
>  
>  	phys_alloc_init(freemem_start, mem_end - freemem_start);
> +	phys_alloc_get_unused(&base, &top);
> +	base = (base + PAGE_SIZE - 1) & -PAGE_SIZE;
> +	top = top & -PAGE_SIZE;
> +
> +	/* Make the pages available to the physical allocator */
> +	free_pages((void *)(unsigned long)base, top - base);
> +	page_alloc_ops_enable();
>  }
>  
>  static void sclp_setup_int(void)
> 

This does not apply upstream. (sclp_setup_int) I guess this is based on
your other series.

Tests still run fine

Acked-by: David Hildenbrand <david@xxxxxxxxxx>

-- 

Thanks,

David / dhildenb



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