[PATCH v2 03/24] KVM: arm64: Add flags to struct hyp_page

[Vincent Donnefort]

On Thu, Jun 30, 2022 at 02:57:26PM +0100, Will Deacon wrote:
> From: Quentin Perret <qperret at google.com>
> 
> Add a 'flags' field to struct hyp_page, and reduce the size of the order
> field to u8 to avoid growing the struct size.
> 
> Signed-off-by: Quentin Perret <qperret at google.com>
> Signed-off-by: Will Deacon <will at kernel.org>
> ---
>  arch/arm64/kvm/hyp/include/nvhe/gfp.h    |  6 +++---
>  arch/arm64/kvm/hyp/include/nvhe/memory.h |  3 ++-
>  arch/arm64/kvm/hyp/nvhe/page_alloc.c     | 14 +++++++-------
>  3 files changed, 12 insertions(+), 11 deletions(-)
> 
> diff --git a/arch/arm64/kvm/hyp/include/nvhe/gfp.h b/arch/arm64/kvm/hyp/include/nvhe/gfp.h
> index 0a048dc06a7d..9330b13075f8 100644
> --- a/arch/arm64/kvm/hyp/include/nvhe/gfp.h
> +++ b/arch/arm64/kvm/hyp/include/nvhe/gfp.h
> @@ -7,7 +7,7 @@
>  #include <nvhe/memory.h>
>  #include <nvhe/spinlock.h>
>  
> -#define HYP_NO_ORDER	USHRT_MAX
> +#define HYP_NO_ORDER	0xff

BUG_ON in hyp_page_ref_inc() might now need to test for 0xff/HYP_NO_ORDER
instead of USHRT_MAX.

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